CN102252961A - Measuring device of the adhesive intensity of toner and the measuring method thereof - Google Patents
Measuring device of the adhesive intensity of toner and the measuring method thereof Download PDFInfo
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- CN102252961A CN102252961A CN2011101039594A CN201110103959A CN102252961A CN 102252961 A CN102252961 A CN 102252961A CN 2011101039594 A CN2011101039594 A CN 2011101039594A CN 201110103959 A CN201110103959 A CN 201110103959A CN 102252961 A CN102252961 A CN 102252961A
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Abstract
The invention provides a measuring device of the adhesive intensity of toner and the measuring method thereof. The measuring device includes a developer holding section Including a first magnet for holding the two-component developer by a magnetic force; an airflow supply section for supplying airflow to the two-component developer held by the first magnet; a separated toner detecting section for detecting the number of toner separated from the carrier by the airflow; and an adhesion calculating section for calculating the adhesion of the toner to the carrier or an index of the adhesion, based on wind speed of the airflow and the detected number of the separated toner. Thus, the device can measure the adhesion of the toner to the carrier with high reproducibility and exactness.
Description
Technical field
The present invention relates to toner adhesive strength determinator and toner adhesive strength assay method that a kind of adhesive strength that is used for measuring toner that tow-component developer contains and carrier distributes.
Background technology
All the time, the image processing system that uses by carrier and contain the electrofax mode of the tow-component developer that the carrier of magnetic composition constitutes is in the public eye.In this image processing system, at the electrostatic latent image of photosensitive surface formation and view data correspondence, it is also visual by toner this electrostatic latent image to be developed.In this case, the tow-component developer that will contain toner and carrier is sent to the position relative with photosensitive surface, by because of above-mentioned electrostatic latent image generation effect, than the strong electrostatic attraction of adhesive strength (adhesion) of toner and carrier, toner is moved to above-mentioned electrostatic latent image.
And in using the developing process of tow-component developer, people know and can the adhesive strength of toner and carrier be impacted the ratio electric charge of toner, the shape of toner etc.And know that the charging property of toner can reduce gradually because of long-term the use.
When the adhesive strength of toner and carrier reduces, produce that to move to the amount of toner of photoreceptor from developing apparatus excessive and make image quality decrease, or toner is from problems such as developing apparatus disperse.
Therefore, require a kind of exploitation of the toner that in carrying out tow-component developer, uses, to the basis of the optimization of developing process, the evaluation of degree of degeneration etc., can be easily and correctly measure the adhesive strength of toner and carrier or the technology that adhesive strength distributes.
Generally speaking, the adhesive strength of the powder of toner etc. is separated powder required power and is detected from the body that is attached that powder adheres to by measuring.And as making powder from being attached the method that body separates, centrifugal separation, electric field method, to spurt method etc. comparatively known.
In centrifugal separation (for example with reference to patent documentation 1～3), on the relative position of the test portion substrate that powder is adhered to, configuration receives from the reception substrate of the powder of test portion substrate separation, the test portion substrate is arranged in the rotor of centrifugal separating device, utilize the centrifugal force of the rotation generation of rotor, powder is separated from the test portion substrate, and be attached to the reception substrate.And measure the quality that is attached to the powder that receives substrate,, calculate and separate required centrifugal force, obtain the adhesive strength of powder with respect to the test portion substrate according to the quality of powder and the rotation number of rotor.
In electric field method (for example with reference to patent documentation 4～6), on the relative position of the electric conductivity test portion substrate that powder is adhered to, configuration receives from the electric conductivity of the powder of test portion substrate separation and receives substrate, to the electrode that is disposed at test portion substrate one side and be disposed between the electrode that receives substrate one side and apply electric field, thereby charged powder is separated from the test portion substrate, be attached on the reception substrate.And, measure the quality that is attached to the powder that receives substrate, utilize the quality of mensuration, measure the quantity of electric charge of good powder, the electric field intensity that applies in advance, obtain and separate required electrostatic force, thereby calculate the adhesive strength of powder with respect to the test portion substrate.
In the method for spurting (for example with reference to patent documentation 2), spray pressurized air to the test portion substrate that is attached with powder with predetermined wind speed, thereby powder is separated from the test portion substrate, catch the powder that separates with precipitron, the volume of the powder of catching according to precipitron, obtain the air resistance that powder is subjected to, calculate the adhesive strength of powder in view of the above with respect to the test portion substrate.
And patent documentation 7 discloses following method: high-speed mobile is attached with the test portion substrate of powder, thereby powder is separated from the test portion substrate, and population and mass particle according to after separating detect the adhesive strength of powder with respect to the test portion substrate.
And, patent documentation 8 discloses following method: make developer magnetic adherence that the potpourri of toner and carrier constitutes to the test portion substrate, when this developer applies certain electric field, make the relative real estate of test portion substrate to the vertical direction high-speed mobile, thereby make the toner separation carrier, obtain population and mass particle before and after breaking away from, thereby measure the adhesive strength of carrier and toner.
Patent documentation 1: Japanese kokai publication hei 10-267772 communique (putting down on October 9th, 10 openly)
Patent documentation 2: Japanese kokai publication hei 11-237327 communique (putting down on August 31st, 11 openly)
Patent documentation 3: Japanese kokai publication hei 11-258081 communique (putting down on September 24th, 11 openly)
Patent documentation 4: Japanese kokai publication hei 11-153538 communique (putting down on June 8th, 11 openly)
Patent documentation 5: TOHKEMY 2001-228075 communique (putting down on August 24th, 13 openly)
Patent documentation 6: TOHKEMY 2005-201884 communique (putting down on July 28th, 17 openly)
Patent documentation 7: TOHKEMY 2003-156426 communique (putting down on May 30th, 15 openly)
Patent documentation 8: TOHKEMY 2003-098065 communique (putting down on April 3rd, 15 openly)
But in the method for above-mentioned patent documentation 1～7,, can't measure the adhesive strength between toner and the carrier though can measure adhesive strength between powder and the test portion substrate.That is, in the method for patent documentation 1～7, not only toner separates from the test portion substrate, and carrier also separates, and therefore is difficult to measure the adhesive strength of toner and carrier.And, when method is spurted in use, be difficult to make the air-flow of uniform wind speed to blow to each toner in the developer, and not only toner disperse, carrier also disperses owing to air-flow, measurement result produces variation, is difficult to carry out the good mensuration of reappearance.
And, though put down in writing the adhesive strength that detects toner and carrier in the patent documentation 8, but apply impact by the test portion substrate that magnetic adherence is had developer, particulate is separated from magnetic particle, therefore momentary action can produce inequality in the power of each developer, and precision is lower, the problem of poor reproducibility because of measuring appears in these factors.
Summary of the invention
The object of the present invention is to provide a kind of reproducibility preferably, correctly to determine toner adhesive strength determinator and the toner adhesive strength assay method of toner with respect to the adhesive strength of carrier.
And, be not to take place fifty-fifty in the degeneration of toner charging property all toners in developer, there is individual difference between each toner.That is, in the long-term developer that uses, mixing exists the toner of charging property reduction and the toner that charging property does not reduce substantially.And when there was inequality in the shape of toner, there was greatly different situations in the adhesive strength of toner and carrier at each toner.Therefore, for degree of degeneration, the characteristic of estimating toner, the distribution situation of the adhesive strength of each toner that contains in the developer is grasped in requirement.But in the technology of patent documentation 8, the average adhesive strength of the toner integral body that can only obtain to contain in the developer can't detect the distribution situation of the adhesive strength of toner.
Other purposes of the present invention are, provide a kind of reproducibility well, correctly to measure toner adhesive strength determinator and the toner adhesive strength assay method of toner with respect to the adhesive strength distribution of carrier.
Toner adhesive strength determinator of the present invention measure contain toner and have in the tow-component developer of carrier of magnetic composition, above-mentioned toner is with respect to the adhesive strength of above-mentioned carrier, it is characterized in that, have: the developer maintaining part has the 1st magnet that keeps above-mentioned tow-component developer by magnetic force; The air-flow supply unit provides air-flow to the above-mentioned tow-component developer that is kept by above-mentioned the 1st magnet; Separate the toner test section, detect conduct because of the number of said flow from the separation toner of the toner of above-mentioned carrier separation; And the adhesive strength calculating part, according to the wind speed and the above-mentioned number of separating the detected separation toner of toner test section of said flow, carry out the calculating of index of the degree of the calculating of adhesive strength of above-mentioned toner and above-mentioned carrier or expression adhesive strength.In addition, These parameters is not particularly limited so long as can represent getting final product of adhesive strength degree, for example also can use according to the detection number that separates toner, detect wall portion cut-out power that the wind gage when separating toner calculates etc.
And, toner adhesive strength assay method of the present invention measure contain toner and have in the tow-component developer of carrier of magnetic composition, above-mentioned toner is with respect to the adhesive strength of above-mentioned carrier, it is characterized in that, comprise: developer keeps step, makes the 1st magnet keep above-mentioned tow-component developer by magnetic force; The air-flow supplying step provides air-flow to the above-mentioned tow-component developer that is kept by above-mentioned the 1st magnet; Separate toner and detect step, detect conduct because of the number of said flow from the separation toner of the toner of above-mentioned carrier separation; And the adhesive strength calculation procedure, according to the wind speed of said flow with above-mentionedly separate the number that toner detects detected separation toner in the step, calculate the index of the degree of the adhesive strength of above-mentioned toner and above-mentioned carrier or expression adhesive strength.
According to above-mentioned toner adhesive strength determinator and toner adhesive strength assay method, make the 1st magnet keep tow-component developer, thereby tow-component developer can be remained the magnetic brush shape by magnetic force.That is, tow-component developer is remained, the vertical direction of maintenance face of the tow-component developer in relative the 1st magnet erects arranges the ground maintenance.Therefore, each carrier and each toner that air-flow is contacted substantially fifty-fifty contain in the tow-component developer.So, provide air-flow to the tow-component developer that keeps by the 1st magnet, detection is because of the number of this air-flow from the separation toner of carrier separation, according to the wind speed of said flow and the number of separating toner of detection, calculate the adhesive strength of toner and carrier or the index of degree of expression adhesive strength, thereby reproducibility well, is correctly measured the index of the degree of the adhesive strength of toner and carrier or expression adhesive strength.
Description of drawings
Fig. 1 is the block diagram of the formation of the toner adhesive strength measure of spread device that relates to of expression an embodiment of the invention.
Fig. 2 is the skeleton view of the developer maintaining part that has of expression toner adhesive strength measure of spread device shown in Figure 1.
Fig. 3 is the cut-open view of the developer maintaining part that has of expression toner adhesive strength measure of spread device shown in Figure 1.
Fig. 4 is the planimetric map of the 1st magnet that has of Fig. 2 and developer maintaining part shown in Figure 3.
Fig. 5 is the key diagram that the characteristic of the toner that uses is tested in expression.
Fig. 6 is the chart that an example of the experimental result that toner adhesive strength measure of spread device shown in Figure 1 carries out is used in expression, the detection frequency of separation toner when the expression wind speed increased with certain proportion corresponding to the elapsed time, under each elapsed time.
Fig. 7 is the chart that an example of the experimental result that toner adhesive strength measure of spread device shown in Figure 1 carries out is used in expression, last figure expression is to having mixed the tow-component developer of toner and carrier, the detection frequency of the separation toner under each elapsed time when wind speed was increased with certain proportion corresponding to the elapsed time, figure below is represented the carrier monomer to unmixed toner, the detection frequency of the carrier under each elapsed time when wind speed was increased with certain proportion corresponding to the elapsed time.
Fig. 8 is the chart that an example of the experimental result that toner adhesive strength measure of spread device shown in Figure 1 carries out is used in expression, the cumulative distribution of the detection number of the separation toner under each elapsed time when expression makes wind speed increase with certain proportion corresponding to the elapsed time.
Fig. 9 is the chart that an example of the experimental result that toner adhesive strength measure of spread device shown in Figure 1 carries out is used in expression, the cumulative distribution of the detection number of the separation toner under each elapsed time when expression makes wind speed increase with certain proportion corresponding to the elapsed time.
Figure 10 is the chart that an example of the experimental result that toner adhesive strength measure of spread device shown in Figure 1 carries out is used in expression, be for a plurality of toners more different, drawn the chart of the wind speed of 50% in the toner that contains in the tow-component developer when carrier separates than electric charge.
Figure 11 is the skeleton view of the developer maintaining part that has of toner adhesive strength determinator that comparative example relates to.
Figure 12 is the skeleton view of the developer container that has of developer maintaining part shown in Figure 11.
Figure 13 is the chart that an example of the experimental result that toner adhesive strength measure of spread device shown in Figure 1 carries out is used in expression, the cumulative distribution of the detection number of the separation toner under each elapsed time when expression makes wind speed increase with certain proportion corresponding to the elapsed time, the result when under identical conditions, repeating secondary.
Figure 14 is the chart of an example of toner adhesive strength measure of spread device that expression uses comparative example shown in Figure 11 the to relate to experimental result of carrying out, the cumulative distribution of the detection number of the separation toner under each elapsed time when expression makes wind speed increase with certain proportion corresponding to the elapsed time, the result when under identical conditions, repeating secondary.
Figure 15 (a) is the skeleton view of the variation of the developer maintaining part that has of expression toner adhesive strength measure of spread device shown in Figure 1.
Figure 15 (b) has amplified the 1st magnet that the developer maintaining part shown in Figure 15 (a) has and the skeleton view of the 2nd magnet.
Figure 16 is the cut-open view of the variation of the developer maintaining part that has of expression toner adhesive strength measure of spread device shown in Figure 1.
Figure 17 is the skeleton view of the variation of the 1st magnet that has of the toner adhesive strength measure of spread device shown in expression Figure 15 (a) and Figure 15 (b) and the 2nd magnet.
Figure 18 is the skeleton view of the variation of the 1st magnet that has of the toner adhesive strength measure of spread device shown in expression Figure 15 (a) and Figure 15 (b) and the 2nd magnet.
Embodiment
(the 1. formation of toner adhesive strength measure of spread device 1)
An embodiment of the invention are described.Fig. 1 is the block diagram of the formation of the toner adhesive strength measure of spread device (toner adhesive strength determinator) 1 that relates to of expression present embodiment.
As shown in the drawing, toner adhesive strength measure of spread device 1 has: developer maintaining part 2, air-flow supply unit 3, separation toner test section 4, calculating part 5 and exhaust apparatus 6.
Air-flow supply unit 3 has filtrator 3a, compressor 3b, dryer 3c and wind speed and adjusts machine 3d as shown in Figure 1, and filtrator 3a, compressor 3b, dryer 3c and wind speed are adjusted machine 3d and be linked in sequence according to this by ajutage 7a, 7b, 7c.
Filtrator 3a is used for removing dust etc. from the extraneous gas that compressor 3b attracts.
Fig. 2 is the skeleton view of developer maintaining part 2, and Fig. 3 is the cut-open view of developer maintaining part 2.As shown in Figures 2 and 3, developer maintaining part 2 has: the mozzle 21 that is made of the pipe of the corner post shape of hollow form; The 1st magnet 22 that the inwall of mozzle 21 has.
As mozzle 21, using the shape of the inner wall part in long 140mm, the cross section vertical with bearing of trend is the device of the rectangle of wide (flow path width) 8mm, height (stream height) 1mm.But the shape and the size of mozzle 21 are not limited thereto.
The 1st magnet 22 is configured to: on the bottom surface in mozzle 21, the bottom surface beyond the zone of configuration the 1st magnet 22 in the surface of the inboard of the mozzle 21 in the 1st magnet 22 and the inner wall part of mozzle 21 is same plane.And the 1st magnet 22 is configured to, and the S utmost point is towards the inboard of mozzle 21, and the N utmost point is towards the outside of mozzle 21.So, form radial magnetic field between the S utmost point in the 1st magnet 22 and the N utmost point, schematically shown in Figure 3, by toner T1 and contain tow-component developer that the support C of magnetic composition constitutes by the 1st magnet 22 remain the magnetic brush shape (with the direction of the 1st magnet 22 Surface Vertical on arrange keep).
And in the present embodiment, as the 1st magnet 22, using the surface of mozzle 21 inboards is the rectangle of wide 8mm, long 27mm, the permanent magnet of magnetic flux density 120mT.But the formation of the 1st magnet 22 is not limited thereto.And in the present embodiment, the S utmost point towards mozzle 21 inboards, the N utmost point is towards the ground configuration of mozzle 21 outsides, but be not limited thereto, but also the N utmost point towards mozzle 21 inboards, the S utmost point is towards the configuration of ground, mozzle 21 outsides.
Separate toner test section 4 and detect from the tow-component developer that keeps by the 1st magnet 22 number of separating toner T2 of separating, transporting in the lump with air-flow, and the number information of the separation toner T2 that will detect outputs to calculating part 5 in real time.Can detect the toner number that contains in the airflow as long as separate toner test section 4, be not particularly limited, for example can use commercially available particle analyzer etc.In the present embodiment, レ one ザ one ダ ス ト モ ニ タ one (particle analyzer) LD-1 that has used bavin field science Co., Ltd. to make).
And as shown in Figure 1, separate toner test section 4 and be connected to cone shape mozzle 8, the direction that this mozzle 8 is got over towards developer maintaining part 2, the sectional area of peristome is big more, the airflow A that discharges from the mozzle 21 of developer maintaining part 2, and around the mozzle 21 leaked-in air stream B be inhaled into simultaneously.So, suck leaked-in air stream B around the mozzle 21 simultaneously with airflow A, thereby can suppress to separate the wall that toner T2 is attached to mozzle 8, can improve the mensuration precision.
Exhaust apparatus 6 has makes filtrator and the air attractor (all not shown) of separation toner T2 from air separation, is connected to by gas outlet 9 and separates toner test section 4.So, attract from the air of separation toner test section 4 discharges, and separate the separation toner T2 that contains in the air that attracts, be discharged to the outside having removed the air that separates toner T2 with filtrator with the air attractor.
(2. experimental result)
The measurement result (testing result that the toner adhesive strength distributes) of the toner adhesive strength that use toner adhesive strength measure of spread device 1 carries out then is described.
Experimental technique is, at first the tow-component developer mixed/stirred that will be made of toner and carrier makes toner charged, kept by the 1st magnet 22 of developer maintaining part 2.And in the present embodiment, as shown in Figure 4, only the central portion by the upper surface (the maintenance face of tow-component developer) of the 1st magnet 22 keeps developer.This be because, can reduce the influence of air turbulence that the wall of mozzle 21 causes to measurement result, and by only in the zone of the maintenance face approximate vertical of the relative tow-component developer of magnetic line of force direction of the 1st magnet 22, keeping developer, tow-component developer can be remained the magnetic brush shape, make air-flow contact each carrier and each toner fifty-fifty.Promptly, in the peripheral edge portion of the 1st magnet, magnetic line of force direction and maintenance face angulation diminish, be difficult to tow-component developer is remained the magnetic brush shape, therefore in the present embodiment, for the developer that makes determination object remains the magnetic brush shape equably, only the central portion at the upper surface of the 1st magnet 22 keeps developer.
Particularly, the peripheral edge portion of the upper surface of the 1st magnet 22 film with nonmagnetic material is covered wide 4mm * long 23mm, area 92mm in the central portion of the upper surface of the 1st magnet 22
2Zone (the oblique line portion of Fig. 4) in, be sprinkled into the tow-component developer that mixed/stirred crosses and make its dispersion, 20mg is fallen by gravity.Therefore, the developer level under the unit area is 0.22mg/mm
2=0.22kg/m
2In addition, sieve uses the device of mesh 75 μ m (200).So, the tow-component developer that drops on the 1st magnet 22 is that ferromagnetism, carrier have the magnetic composition because of the 1st magnet 22, thus the magnetic brush shape erect arrangement (with the direction of the 1st magnet 22 Surface Vertical on erect arrangement).Peel off the above-mentioned film that covers employed nonmagnetic material afterwards, will keep the 1st magnet 22 of tow-component developer to be set on the developer maintaining part 2.
Then provide air-flow to mozzle 21, increase (dull increasing) wind speed, so that wind speed reaches 150m/s after at the fixed time with certain proportion from 3 beginnings of air-flow supply unit.
So, the toner T1 that is attached to the support C in the developer maintaining part 2 is subjected to the air resistance with the wind speed correspondence.And when the air resistance that toner T1 is subjected to was bigger than the adhesive strength of toner T1 and support C, this toner T1 separated from support C, became and separated toner T2, was transported to by air-flow and separated toner test section 4.
And in this experiment, each toner when having used toner A shown in Figure 5～C has carried out the detection that the toner adhesive strength distributes.Toner A is the toner that constitutes by the polyester that polymerization generates, average particle diameter 5.0 μ m, particle average density 1.2 * 10
3Kg/m
3, SF-1=130, SF-2=123.Toner B is the toner that constitutes by the polyester that polymerization generates, average particle diameter 5.0 μ m, particle average density 1.2 * 10
3Kg/m
3, SF-1=154, SF-2=138.Toner C is the toner that constitutes by the polyester that comminuting method generates, average particle diameter 5.0 μ m, particle average density 1.2 * 10
3Kg/m
3, SF-1=160, SF-2=145.In addition, SF-1 and SF-2 are the shape coefficients of the shape of expression toner particle, and value is represented subglobular more near 100 more.Particularly, SF-1 and SF-2 are L in the absolute maximum length of toner particle
Max, toner particle projected area be that the girth of Area, toner particle is L
PerimeterThe time, define with following formula:
(numerical expression 1)
And, use with resin-coated carriers core particle, average particle diameter 45～50 μ m that constitute by ferrite as carrier.
Fig. 6 is that expression is used charged toner C for-22.9 μ C/g, begun to arrive 150m/s with certain proportion (air-flow acceleration alpha=0.05m/s after 50 minutes for wind speed is supplied with from air-flow
2) chart of detection frequency of separation toner when increasing, under each elapsed time.In addition, the last figure of Fig. 6 expression wind speed through the time change, figure below is represented the frequency distribution (attribute disperses) of the population of detected separation toner.
The last figure of Fig. 7 is that expression is used charged toner B for-37.4 μ C/g, begun to arrive 150m/s with certain proportion (air-flow acceleration alpha=0.5m/s after 5 minutes for wind speed is supplied with from air-flow
2) chart of detection frequency of separation toner when increasing wind speed, under each elapsed time.And, figure below of Fig. 7 be expression make the carrier monomer 19mg of unmixed toner be attached to the upper surface of the 1st magnet 22 central portion, begin after 5 minutes, to arrive 150m/s for wind speed is supplied with from air-flow with certain proportion (air-flow acceleration alpha=0.5m/s
2) chart of detection frequency of carrier when increasing, under each elapsed time.In addition, the longitudinal axis of figure below and transverse axis compare with last figure for being easy to, to represent with last figure same standard.As can be seen from Figure 7, the carrier number that disperses is compared considerably less with the toner number that flies away from from carrier and disperse.Therefore as can be known, in the dispersion property shown in the last figure of Fig. 7, be not subjected to the influence that carrier disperses substantially, dispersing of toner particle is dominance.In addition, when observing with microscope for the matching of confirming result shown in Figure 7 and actual phenomenon, the dispersing of carrier unconfirmed in the scope of wind speed 0 to 40m/s only confirmed dispersing of toner.
Fig. 8 is that expression is used charged toner A and charged toner A for-32.5 μ C/g for-11.0 μ C/g, begun to arrive 150m/s with certain proportion (air-flow acceleration alpha=0.5m/s after 5 minutes for wind speed is supplied with from air-flow
2) chart of cumulative distribution of detection number (toner adhesive strength) when increasing, that separate toner.
In addition, cumulative distribution is following to be obtained: the detection number of the separation toner under each wind speed of adhesion calculating part 5b extraction wind speed 0～150m/s, be accumulated to the number of the separation toner till the 150m/s, with the detection number of the separation toner under each wind speed divided by above-mentioned aggregate-value, to remove value after calculating till wind speed 0～150m/s according to each wind speed accumulative total.
And, the power that toner is subjected to by air-flow and the quadratic power of wind speed is proportional becomes big.Therefore adhesion calculating part 5b basis is calculated the cumulative distribution (distribution of toner adhesive strength) of toner adhesive strength to the cumulative distribution of the detection number of the separation toner of each wind speed.
And Fig. 9 represents to use respectively charged toner C for-22.0 μ C/g ,-22.9 μ C/g ,-30.1 μ C/g, begins to arrive 150m/s with certain proportion (air-flow acceleration alpha=0.5m/s after 5 minutes for wind speed is supplied with from air-flow
2) chart of cumulative distribution of detection number (toner adhesive strength) when increasing, that separate toner.
And Figure 10 is the toner A～C that has drawn for more different than electric charge, begins to arrive 150m/s with certain proportion (air-flow acceleration alpha=0.5m/s after 5 minutes for wind speed is supplied with from air-flow
2) chart of the wind speed of toner when increasing, 50% when carrier separates.
As Fig. 8 and shown in Figure 9,, can correctly detect the ratio electric charge of toner and toner relation with respect to the adhesive strength of carrier by the toner adhesive strength measure of spread device 1 of present embodiment.That is, bigger more than electric charge generally speaking as can be seen from Figure 10, toner is strong more with respect to the adhesive strength of carrier, but by the toner adhesive strength determinator 1 that present embodiment relates to, can correctly detect.And as shown in figure 10, compare with the toner that generates by polymerization by the toner that comminuting method generates, big with respect to the adhesive strength of carrier.
1 pair of adhesive strength (adhesion) Determination of distribution of toner adhesive strength measure of spread device of present embodiment then is described and can't help the 1st magnet 22 and keep developers and be configured in the experimental result of adhesive strength (adhesion) Determination of distribution of the toner adhesive strength measure of spread device that the comparative examples in the mozzle 21 relate to.
Figure 11 is the skeleton view of the developer maintaining part 102 that relates to of comparative example, and Figure 12 is the skeleton view of the developer container 122 that has of developer maintaining part 102.The formation of the toner adhesive strength determinator that comparative example relates to is except the formation difference of developer maintaining part, and is identical with toner adhesive strength measure of spread device 1.As shown in figure 11, developer maintaining part 102 has developer container 122, substitutes the 1st magnet 22 in the developer maintaining part 2.Developer container 122 has the bucket-shaped depression 122a of wide 4mm * long 23mm as shown in figure 12, accommodates developer in this depression 122a.
Figure 13 is the expression toner adhesive strength measure of spread device 1 that uses present embodiment, to charged for the unsetting toner (crushed toner) of-22.0 μ C/g, begin through arrival 150m/s after 5 minutes with certain proportion (air-flow acceleration alpha=0.5m/s for wind speed is supplied with from air-flow
2) processing when increasing, that calculate the cumulative distribution of the detection number (toner adhesive strength) that separates toner, the chart of the result when under identical conditions, repeating secondary.
And Figure 14 is the expression toner adhesive strength determinator that uses comparative example and relate to, except the processing of developer container difference to calculate the cumulative distribution of the detection number (toner adhesive strength) that separates toner under external and the same condition of Figure 13, the chart of the result when repeating secondary.
As shown in figure 14, when using the toner adhesive strength determinator that comparative example relates to, measurement result is greatly different when measuring at every turn, and the reappearance of measurement result is lower.Relative with it, as shown in figure 13, when using the toner adhesive strength determinator 1 of present embodiment, even replication also can obtain essentially identical result, the reappearance of measurement result is higher.
Can think this be because, in the toner adhesive strength measure of spread device that comparative example relates to, (1) air-flow only contacts the upper surface of the developer that is positioned at the surface in the developer of accommodating in the developer container 122, air-flow does not contact developer fifty-fifty, and (2) carrier do not keep by magnet, therefore can disperse by air-flow.
On the other hand, in the toner adhesive strength determinator 1 that present embodiment relates to, (1) but by the 1st magnet 22 magnetic brush shapes keep developer (with the direction of the 1st magnet 22 Surface Vertical on erect arrange ground and keep), therefore can make air-flow contact developer fifty-fifty, and the magnetic field of (2) carrier of containing the magnetic composition by the 1st magnet 22 is kept by magnetic, therefore can suppress carrier disperses because of air-flow, the toner that separates from carrier is dispersed, thereby can obtain the strong measurement result of reappearance.
As mentioned above, the toner adhesive strength measure of spread device 1 that present embodiment relates to has: the developer maintaining part has the 1st magnet 22 that keeps tow-component developer by magnetic force; Air-flow supply unit 3 provides air-flow to the tow-component developer that is kept 22 by the 1st magnet; Separate toner test section 4, detect conduct because of the number of said flow from the separation toner of carrier separation; And adhesion calculating part 5b, according to the wind speed and the above-mentioned number of separating toner test section 4 detected separation toners of said flow, calculate the distribution of the adhesive strength of toner and carrier.
So, make the 1st magnet 22 keep tow-component developer, thereby tow-component developer can be remained the magnetic brush shape, each carrier and each toner that therefore air-flow is contacted substantially fifty-fifty to contain in the tow-component developer by magnetic force.So, provide air-flow to the tow-component developer that keeps by the 1st magnet 22, detection is because of the number of this air-flow from the separation toner of carrier separation, according to the wind speed of said flow and the number of separating toner of detection, calculate the distribution of the adhesive strength of toner and carrier, thereby reproducibility well, is correctly measured the adhesive strength distribution of toner and carrier.
In addition, in the present embodiment, illustrated that wind speed control part 5a changes the wind speed, the adhesion calculating part 5b that are provided to the air-flow of mozzle 21 from air-flow supply unit 3 and calculates the formation of toner adhesive strength distribution according to the detection number of separation toner each wind speed under, but be not limited thereto.For example, can make also that to be provided to the wind speed of air-flow of mozzle 21 from air-flow supply unit 3 certain,, calculate the average adhesive strength of the toner integral body that contains in the developer according to the detection number of the separation toner under this wind speed.And wind speed control part 5a also can distribute according to the toner adhesive strength that calculates, and calculates the average adhesive strength of the toner that contains in the developer.
And, be not limited to calculate the formation that adhesive strength or adhesive strength distribute, also can calculate the distribution of index of the degree of the index of degree of expression adhesive strength or expression adhesive strength.For example can use as These parameters: separate toner the detection number, separate toner the detection number divided by the value in sampling period of separating toner etc., the wall portion cut-out power of calculating according to the wind gage that detects when separating toner etc.
And in the present embodiment, used the permanent magnet of magnetic flux density 120mT as the 1st magnet 22, but be not limited thereto, get final product so long as the formation in the magnetic field (perhaps the amount from the 1st magnet 22 isolated vectors can be suppressed the magnetic field for the degree of the scope that measurement result of separating toner T2 do not impacted) of the degree that carrier can not separate from the 1st magnet 22 because of the air-flow that provides from air-flow supply unit 3 can be provided.
And in the present embodiment, the bottom surface of the mozzle 21 in the developer maintaining part 2 only disposes one the 1st magnet 22, but is not limited thereto.
Figure 15 (a) is the skeleton view of the variation of expression developer maintaining part 2, Figure 15 (b) is the 1st magnet 22 that has of developer maintaining part 2 that this variation relates to and the enlarged perspective of the 2nd magnet 23, and Figure 16 is the cut-open view of the developer maintaining part 2 that relates to of this variation.
Shown in each figure, on the position relative in the upper surface of the inner wall part of mozzle 21, can make opposite face one side of the 1st magnet 22 become N polar region (is opposite polarity (antipolarity) with the opposite face of the 1st magnet 22) configuration the 2nd magnet 23 with the 1st magnet 22.So, between the 1st magnet 22 and the 2nd magnet 23, form substantially parallel magnetic field, can be with by toner with contain tow-component developer that the carrier of magnetic composition constitutes as shown in figure 16, magnetic brush shape ground keeps (erect in the direction with the Surface Vertical of the 1st magnet 22 and the 2nd magnet 23 and arrange the ground maintenance).
Figure 17 is the skeleton view of the variation of the 1st magnet 22 that has of developer maintaining part 2 of expression Figure 15 (a) and the 2nd magnet 23.In the example shown in this figure, be provided with on the face relative in the 1st magnet 122: to outstanding a plurality of protuberances (the 1st teat) 122a of the direction of the 2nd magnet 123 with the 2nd magnet 123; Be configured between the protuberance 122a, to recess (slit) 122b of opposite sides depression with the 2nd magnet 123.And, on the face relative in the 2nd magnet 123 with the 1st magnet 122, on the position relative with each protuberance 122a of the 1st magnet 122, be provided with to outstanding protuberance (the 2nd teat) 123a of the direction of the 1st magnet 122, on the position relative, recess (slit) 123b to the side depression opposite with the 1st magnet 122 is set with each recess 122b of the 1st magnet 122.And each protuberance 122a and each protuberance 123a are made of elongated cube shaped, with mozzle 21 in extend configuration on the substantially parallel direction of the direction of airflow flowing.
So, can local improve the 1st magnet 122 each protuberance 122a, and the protuberance 123a of the 2nd magnet 123 of relative configuration with these each protuberance 122a between magnetic flux density (magnetic field intensity), so between protuberance 122a and protuberance 123a, can form the magnetic brush of tow-component developer.And, the magnetic brush that is made of tow-component developer is formed on precalculated position (each relative portion of protuberance 122a and protuberance 123a) under state independent of each other, therefore the air-flow that provides is mainly by between recess 122b and the recess 123b, contact the magnetic brush that forms between protuberance 122a and the protuberance 123a fifty-fifty, therefore can improve the reappearance of measurement result.
Figure 18 is the skeleton view of other variation of the 1st magnet 22 that has of developer maintaining part 2 of expression Figure 15 (a) and the 2nd magnet 23.In the example shown in this figure, be provided with on the face relative in the 1st magnet 222: to outstanding a plurality of protuberances (the 1st teat) 222a of the direction of the 2nd magnet 223 with the 2nd magnet 223; Be configured between the protuberance 222a, to the recess 222b of the opposite sides depression of the 2nd magnet 123.And on the face relative in the 2nd magnet 223 with the 1st magnet 222, on the position relative, be provided with to outstanding protuberance (the 2nd teat) 223a of the direction of the 1st magnet 222, recess (slit) 223b that a side opposite with the 1st magnet 122 caves in is set on the position relative with each recess 222b of the 1st magnet 222 with each protuberance 222a of the 1st magnet 222.And, each protuberance 222a and each protuberance 223a are made of the corner post shape, the direction substantially parallel (the 1st direction) with the direction of airflow flowing in mozzle 21, and with the direction of airflow flowing in mozzle 21 vertical substantially and with the vertical substantially direction (the 2nd direction) of protuberance 222a and the relative direction of protuberance 223a on, rectangular (ranks shape) arranged ground and disposed.In addition, in the example of Figure 18, represented the situation that each protuberance 222a and each protuberance 223a are formed by the corner post shape, the shape of each protuberance 222a and each protuberance 223a is not limited thereto, and for example also can be cylindrical shape.
So, can local improve the 1st magnet 222 each protuberance 222a, and the protuberance 223a of the 2nd magnet 223 of relative configuration with these each protuberance 222a between magnetic flux density (magnetic field intensity), so between protuberance 222a and protuberance 223a, can form the magnetic brush of tow-component developer.And, the magnetic brush that is made of tow-component developer is formed on precalculated position (each relative portion of protuberance 222a and protuberance 223a) under state independent of each other, therefore the air-flow that provides is mainly by between recess 222b and the recess 223b, contact the magnetic brush that forms between protuberance 222a and the protuberance 223a fifty-fifty, therefore can improve the reappearance of measurement result.
As present embodiment in detail as described in, toner adhesive strength determinator of the present invention measure contain toner and have in the tow-component developer of carrier of magnetic composition, above-mentioned toner is with respect to the adhesive strength of above-mentioned carrier, it is characterized in that, have: the developer maintaining part has the 1st magnet that keeps above-mentioned tow-component developer by magnetic force; The air-flow supply unit provides air-flow to the above-mentioned tow-component developer that is kept by above-mentioned the 1st magnet; Separate the toner test section, detect conduct because of the number of said flow from the separation toner of the toner of above-mentioned carrier separation; The adhesive strength calculating part according to the wind speed and the above-mentioned number of separating the detected separation toner of toner test section of said flow, carries out the calculating of index of the degree of the calculating of adhesive strength of above-mentioned toner and above-mentioned carrier or expression adhesive strength.In addition, These parameters is not particularly limited so long as can represent the getting final product of degree of adhesive strength, for example also can use according to the detection number that separates toner, detect wall portion cut-out power that the wind gage when separating toner calculates etc.
And, in the toner adhesive strength assay method of the present invention, mensuration contain toner and have in the tow-component developer of carrier of magnetic composition, above-mentioned toner is with respect to the adhesive strength of above-mentioned carrier, it is characterized in that, comprise: developer keeps step, makes the 1st magnet keep above-mentioned tow-component developer by magnetic force; The air-flow supplying step provides air-flow to the above-mentioned tow-component developer that is kept by above-mentioned the 1st magnet; Separate toner and detect step, detect conduct because of the number of said flow from the separation toner of the toner of above-mentioned carrier separation; The adhesive strength calculating part according to the wind speed of said flow with above-mentionedly separate the number that toner detects detected separation toner in the step, calculates the index of the degree of the adhesive strength of above-mentioned toner and above-mentioned carrier or expression adhesive strength.
According to above-mentioned toner adhesive strength determinator and toner adhesive strength assay method, make the 1st magnet keep tow-component developer, thereby tow-component developer can be remained the magnetic brush shape by magnetic force.That is, tow-component developer is remained, the vertical direction of maintenance face of the tow-component developer in relative the 1st magnet erects arranges the ground maintenance.Therefore, each carrier and each toner that air-flow is contacted substantially fifty-fifty contain in the tow-component developer.So, provide air-flow to the tow-component developer that keeps by the 1st magnet, detection is because of the number of this air-flow from the separation toner of carrier separation, according to the wind speed of said flow and the number of separating toner of detection, calculate the adhesive strength of toner and carrier or the index of degree of expression adhesive strength, thereby reproducibility well, is correctly measured the index of the degree of the adhesive strength of toner and carrier or expression adhesive strength.
And, toner adhesive strength determinator of the present invention is except above-mentioned formation, can be following formation also: have the wind speed control part, the wind speed of the air-flow that control provides from the said flow supply unit, above-mentioned wind speed control part is controlled, make dull the increasing of wind speed of said flow, above-mentioned separation toner test section detects the number of above-mentioned separation toner according to each predetermined wind speed, above-mentioned adhesive strength calculating part is according to number and each corresponding with it wind speed of the separation toner that detects by above-mentioned each predetermined wind speed, carry out the calculating of the toner that contains in the above-mentioned tow-component developer with respect to the distribution of the adhesive strength of carrier, or the calculating of the distribution of the index of the degree of expression adhesive strength.
According to above-mentioned formation, reproducibility well, is correctly measured the distribution with respect to the index of the degree of the distribution of the adhesive strength of carrier or expression adhesive strength of the toner that contains in the above-mentioned tow-component developer.Therefore, when causing toner to have deviation when there is deviation in the charging property degree of degeneration of the toner that for example contains or because of the toner shape is unequal, also can suitably estimate degree of degeneration, the characteristic of toner according to the distribution of said determination with respect to the adhesive strength of carrier in tow-component developer.
And also can be following formation, above-mentioned the 1st configurations of magnets be, the maintenance face that keeps above-mentioned tow-component developer is any one in extremely of the S utmost point or N.
According to above-mentioned formation, can form and the vertical substantially magnetic field of above-mentioned maintenance face, therefore can keep tow-component developer, it is arranged on the direction vertical with above-mentioned maintenance face.Therefore, can further improve the reappearance of measurement result.
And also can be following formation, have the 2nd magnet on the position relative with above-mentioned maintenance face in above-mentioned the 1st magnet, the polarity of the face relative with above-mentioned the 1st magnet in above-mentioned the 2nd magnet be opposite with the polarity of the above-mentioned maintenance face in above-mentioned the 1st magnet.
According to above-mentioned formation, can between the 1st magnet and the 2nd magnet, form substantially parallel magnetic field.Therefore, can keep tow-component developer that it is arranged on the direction vertical with above-mentioned maintenance face, thereby can further improve the reappearance of measurement result.
And also can be following formation, above-mentioned the 1st magnet has to outstanding a plurality of the 1st teats of the direction of above-mentioned the 2nd magnet, above-mentioned the 2nd magnet have be arranged on relative with above-mentioned each the 1st teat locational, to outstanding a plurality of the 2nd teats of the direction of above-mentioned the 1st magnet, by acting on the magnetic force between above-mentioned the 1st teat and above-mentioned the 2nd teat, keep above-mentioned tow-component developer.For example also can be that above-mentioned each the 1st teat and above-mentioned each the 2nd teat extend the ground configuration on the parallel direction of the flow direction of relative said flow.Perhaps also can be, above-mentioned each the 1st teat and above-mentioned each the 2nd teat are along the flow direction of relative said flow parallel the 1st direction and the rectangular configuration of the 2nd direction, the flow direction of the relative said flow of wherein above-mentioned the 2nd direction is vertical, and vertical with the relative direction of above-mentioned the 2nd teat with above-mentioned the 1st teat.
According to above-mentioned each constitute, can the local magnetic flux density that improves between the 1st teat and the 2nd teat, therefore can between these two teats, form the magnetic brush of tow-component developer.And, the magnetic brush that is made of tow-component developer is formed on each relative portion of the 1st teat and the 2nd teat under state independent of each other, therefore the air-flow that provides mainly by between the magnetic brush that the relative portion in the zone of the 2nd teat is not set in zone that the 1st teat is not set in the 1st magnet and the 2nd magnet, promptly forms in each relative portion of the 1st teat and the 2nd teat, contacts magnetic brush fifty-fifty.So, can further improve the reappearance of measurement result.
And also can be following formation, above-mentioned developer maintaining part has mozzle, the said flow that provides from the said flow supply unit flows therein, the said flow supply unit is from a distolateral said flow that provides of above-mentioned mozzle, and above-mentioned separation toner test section detects from the number of the above-mentioned separation toner of another distolateral discharge of above-mentioned mozzle.
According to above-mentioned formation, can stablize the wind speed of the air-flow that is provided to the tow-component developer that keeps by the 1st magnet, improve the reappearance of measurement result.
The invention is not restricted to above-mentioned embodiment, in scope shown in the claim, can carry out various changes.That is the suitable technological means of change and the embodiment that obtains is also contained in the technical scope of the present invention in the scope shown in the combination claim.
The present invention is applicable to the toner adhesive strength determinator of the adhesive strength distribution of toner that contains in the detection tow-component developer and carrier.
Claims (6)
1. toner adhesive strength determinator, measure contain toner and have in the tow-component developer of carrier of magnetic composition, above-mentioned toner is with respect to the adhesive strength of above-mentioned carrier, it is characterized in that having:
The developer maintaining part has the 1st magnet that keeps above-mentioned tow-component developer by magnetic force;
The air-flow supply unit provides air-flow to the above-mentioned tow-component developer that is kept by above-mentioned the 1st magnet;
Separate the toner test section, detect conduct because of the number of said flow from the separation toner of the toner of above-mentioned carrier separation; And
The adhesive strength calculating part according to the wind speed and the above-mentioned number of separating the detected separation toner of toner test section of said flow, carries out the calculating of index of the degree of the calculating of adhesive strength of above-mentioned toner and above-mentioned carrier or expression adhesive strength,
Above-mentioned the 1st configurations of magnets is, the maintenance face that keeps above-mentioned tow-component developer is any one in extremely of the S utmost point or N,
On the position relative in above-mentioned the 1st magnet, have the 2nd magnet with above-mentioned maintenance face,
The polarity of the above-mentioned maintenance face in the polarity of the face that above-mentioned the 1st magnet in above-mentioned the 2nd magnet is relative and above-mentioned the 1st magnet is opposite,
Above-mentioned the 1st magnet has to outstanding a plurality of the 1st teats of the direction of above-mentioned the 2nd magnet,
Above-mentioned the 2nd magnet have be arranged on relative with above-mentioned each the 1st teat locational, to outstanding a plurality of the 2nd teats of the direction of above-mentioned the 1st magnet,
By acting on the magnetic force between above-mentioned the 1st teat and above-mentioned the 2nd teat, keep above-mentioned tow-component developer.
2. toner adhesive strength determinator according to claim 1 is characterized in that,
Have the wind speed control part, the wind speed of the air-flow that control provides from the said flow supply unit,
Above-mentioned wind speed control part is controlled, and makes dull the increasing of wind speed of said flow,
Above-mentioned separation toner test section detects the number of above-mentioned separation toner according to each predetermined wind speed,
Above-mentioned adhesive strength calculating part is according to number and each corresponding with it wind speed of the separation toner that detects by above-mentioned each predetermined wind speed, carry out the calculating of the toner that contains in the above-mentioned tow-component developer with respect to the distribution of the adhesive strength of carrier, or the calculating of the distribution of the index of the degree of expression adhesive strength.
3. toner adhesive strength determinator according to claim 1 is characterized in that, above-mentioned each the 1st teat and above-mentioned each the 2nd teat extend the ground configuration on the parallel direction of the flow direction of relative said flow.
4. toner adhesive strength determinator according to claim 1, it is characterized in that, above-mentioned each the 1st teat and above-mentioned each the 2nd teat are along the flow direction of relative said flow parallel the 1st direction and the rectangular configuration of the 2nd direction, the flow direction of the relative said flow of wherein above-mentioned the 2nd direction is vertical, and vertical with the relative direction of above-mentioned the 2nd teat with above-mentioned the 1st teat.
5. toner adhesive strength determinator according to claim 1 is characterized in that,
Above-mentioned developer maintaining part has mozzle, and the said flow that provides from the said flow supply unit flows therein,
The said flow supply unit is from a distolateral said flow that provides of above-mentioned mozzle, and above-mentioned separation toner test section detects from the number of the above-mentioned separation toner of another distolateral discharge of above-mentioned mozzle.
6. toner adhesive strength assay method, measure contain toner and have in the tow-component developer of carrier of magnetic composition, above-mentioned toner is with respect to the adhesive strength of above-mentioned carrier, it is characterized in that, comprising:
Developer keeps step, makes the 1st magnet keep above-mentioned tow-component developer by magnetic force;
The air-flow supplying step provides air-flow to the above-mentioned tow-component developer that is kept by above-mentioned the 1st magnet;
Separate toner and detect step, detect conduct because of the number of said flow from the separation toner of the toner of above-mentioned carrier separation; And
The adhesive strength calculation procedure according to the wind speed of said flow with above-mentionedly separate the number that toner detects detected separation toner in the step, is calculated the index of the degree of the adhesive strength of above-mentioned toner and above-mentioned carrier or expression adhesive strength,
Keep in the step at above-mentioned developer:
Above-mentioned the 1st configurations of magnets is become, and the maintenance face that keeps above-mentioned tow-component developer is any one in extremely of the S utmost point or N,
Configuration the 2nd magnet on the position relative with above-mentioned maintenance face in above-mentioned the 1st magnet makes the polarity of the polarity of the face relative with above-mentioned the 1st magnet of above-mentioned the 2nd magnet and the above-mentioned maintenance face in above-mentioned the 1st magnet opposite,
As above-mentioned the 1st magnet, use the magnet that has to outstanding a plurality of the 1st teats of the direction of above-mentioned the 2nd magnet,
As above-mentioned the 2nd magnet, use have be arranged on relative with above-mentioned each the 1st teat locational, to the magnet of outstanding a plurality of the 2nd teats of the direction of above-mentioned the 1st magnet,
By acting on the magnetic force between above-mentioned the 1st teat and above-mentioned the 2nd teat, keep above-mentioned tow-component developer.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010105664A JP4927193B2 (en) | 2009-05-22 | 2010-04-30 | Toner adhesion strength measuring apparatus and toner adhesion strength measuring method |
| JP2010-105664 | 2010-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102252961A true CN102252961A (en) | 2011-11-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101039594A Pending CN102252961A (en) | 2010-04-30 | 2011-04-21 | Measuring device of the adhesive intensity of toner and the measuring method thereof |
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| Country | Link |
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| CN (1) | CN102252961A (en) |
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| JPS61266968A (en) * | 1985-05-21 | 1986-11-26 | Fujitsu Ltd | Measuring instrument for amount of toner charge |
| JP2007310275A (en) * | 2006-05-22 | 2007-11-29 | Canon Inc | Magnetic carrier and two-component developer |
| JP2008310084A (en) * | 2007-06-15 | 2008-12-25 | Ricoh Printing Systems Ltd | Adhesive force measuring instrument for toner |
| CN101498904A (en) * | 2008-02-01 | 2009-08-05 | 佳能株式会社 | Two-component developer, replenishing developer, and image-forming method using the developers |
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2011
- 2011-04-21 CN CN2011101039594A patent/CN102252961A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61266968A (en) * | 1985-05-21 | 1986-11-26 | Fujitsu Ltd | Measuring instrument for amount of toner charge |
| JP2007310275A (en) * | 2006-05-22 | 2007-11-29 | Canon Inc | Magnetic carrier and two-component developer |
| JP2008310084A (en) * | 2007-06-15 | 2008-12-25 | Ricoh Printing Systems Ltd | Adhesive force measuring instrument for toner |
| CN101498904A (en) * | 2008-02-01 | 2009-08-05 | 佳能株式会社 | Two-component developer, replenishing developer, and image-forming method using the developers |
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Application publication date: 20111123 |