CA1048809A - Optical cigarette end inspection device - Google Patents
Optical cigarette end inspection deviceInfo
- Publication number
- CA1048809A CA1048809A CA76253882A CA253882A CA1048809A CA 1048809 A CA1048809 A CA 1048809A CA 76253882 A CA76253882 A CA 76253882A CA 253882 A CA253882 A CA 253882A CA 1048809 A CA1048809 A CA 1048809A
- Authority
- CA
- Canada
- Prior art keywords
- cigarette
- light
- probe
- light reflected
- testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A24—TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
- A24C—MACHINES FOR MAKING CIGARS OR CIGARETTES
- A24C5/00—Making cigarettes; Making tipping materials for, or attaching filters or mouthpieces to, cigars or cigarettes
- A24C5/32—Separating, ordering, counting or examining cigarettes; Regulating the feeding of tobacco according to rod or cigarette condition
- A24C5/34—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes
- A24C5/3412—Examining cigarettes or the rod, e.g. for regulating the feeding of tobacco; Removing defective cigarettes by means of light, radiation or electrostatic fields
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Length Measuring Devices By Optical Means (AREA)
- Manufacturing Of Cigar And Cigarette Tobacco (AREA)
- Optical Transform (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
The device for the testing through optical inspection of the cigarette ends comprises two probes made of optical fibres, which probes are arranged orthogonally with respect to each other. A first probe inspects the end surface of the cigarette being tested by directing against the said end surface a beam of light, and picking up the light reflected, the intensity of which depends from the end surface itself and from the distance of said end surface with respect to the said first probe. A second probe inspects a portion of the side surface of the cigarette comprising also the end being tested, by directing against the side surface a beam of light which provides for an inspection field of which only one part is interested by the clgarette end, and picking up the light reflected by the said side surface, the intensity of which depends from the length of the portion of cigarette end which is covered by the field of inspection and which depends from the actual length of the cigarette or from its axial positioning with respect to the probes. The light reflected by the end surface and the light reflected by the side surface are transformed into electric signals, which are compared in algebraic relationship the one with the other, and the resulting signal is used as a measure for the testing of the cigarette end.
The device for the testing through optical inspection of the cigarette ends comprises two probes made of optical fibres, which probes are arranged orthogonally with respect to each other. A first probe inspects the end surface of the cigarette being tested by directing against the said end surface a beam of light, and picking up the light reflected, the intensity of which depends from the end surface itself and from the distance of said end surface with respect to the said first probe. A second probe inspects a portion of the side surface of the cigarette comprising also the end being tested, by directing against the side surface a beam of light which provides for an inspection field of which only one part is interested by the clgarette end, and picking up the light reflected by the said side surface, the intensity of which depends from the length of the portion of cigarette end which is covered by the field of inspection and which depends from the actual length of the cigarette or from its axial positioning with respect to the probes. The light reflected by the end surface and the light reflected by the side surface are transformed into electric signals, which are compared in algebraic relationship the one with the other, and the resulting signal is used as a measure for the testing of the cigarette end.
Description
1~488~9 SUMMARY OF THE INVENTION
The present invention relates to optical devices for inspecting the end of cigarettes which are delivered by cigarette-making machines in rows of cigarettes lying side by side and moving transversally tothe direction of their length.
; Particularly, but not exclusively, this invention relates to the inspection of cigarettes provided with a filter tip, and consequently the end inspection involves only the tobacco end.
The cigarette end inspection, in the optical devices, is based on the measurement of the light reflected by the cigarette end, which is illuminated with a constant intensity.
Obviously, this measurement presupposes that the distance between the optical measuring head and the surface of the cigarette end being tested remains constant for all the cigarettes, since a variation of this distance would cause an optical picking error which invalidates the test and consequently the rejection control promoted by said test.
,i ,!
~ow, even if the cigarettes to be tested are set with their filter ends perfectly aligned, the opposite ends S to be tested may not be equally aligned, because of a cer-tain cigarette cut tolerance range which, if admissible under other points of view, cannot be admitted in such a delicate test as the one effected by optical inspection.
The positive or negative deviations of the actual length of the finished cigarettes from a predetermined rated cigarette length can therefore be of prejudice to the accuracy of the cigarette end inspection.
: ~ 3 ~
., .
1~488~!9 The object of the invention is to provide an optical cigarette end inspection device which is not affected either by the axial displacement of the ciga-rettes in a row or by the possible variations of the cigarette length.
Substantially, the invention relates to an optical device which automatically inspects in suc-cession the ends of a cigarette row advancing along a preset path, this device including at least a pair of probes having groups of light-conveying or emitting optical fibres and groups of light-receiving or picking :
optical fibres, with the fibres of both groups preferably intermingled in each probe, one of said probes being oriented axially against the end surface of the cigarette -:
:~ to be tested, while the other is oriented laterally against the cigarette, perpendicularly to the longitudinal axis ;
of same, and extendsalong the side of the cigarette . so as to partially protrude beyond the cigarette end -.
to be tested, so that the variation of the reflected light, : 20 frontally picked up by the first mentioned probe, and whichdepends from the distance between the probe and the ciga-rette end, is accompanied by a correlative variation of ~:
the reflected light picked up by the side probe, in rela-tion to the actual length of the cigarette, or to an axial displacement of same, said correlative variation being used to discriminate from the component relative to an actual defect of the cigarette end, the component relative to a variation of length of the cigarette as compared to the predetermined rated length.
: 30 According to a further broad aspect, the present invention provides a device for testing through optical in-spection of cigarette ends, comprising: a first fixed " .
. - . ~ ' ' : ' .:
1~4t38~9 probe constructed of optical fibres and directed axially against the end surface of the cigarette to be tested, said first probe serving both for illuminating the said surface end and for picking the reflected light to convey it to a first photoelectric transducer connected to an electric circuit, for the conversion of the light reflected from the end surface of the cigarette into an electric signal presenting a component which corresponds to the distance between the said first probe and the cigarette end, "
a second fixed probe constructed of optical fibres and di-rected perpendieularly to the axis of the said first probe ~ and to the axis of the cigarette,said second probe serving both.~ for illuminating an inspection field of which only one part is provided by a portion of the side surface of the end of the cigarette to be tested, and for receiving the light reflected from the said portion of the side surface of the :
cigarette to convey it to a second photoelectric transdueer eonneeted to an eleetrie eireuit for the eonversion of the ; light reflected by the side surface of the eigarette into an electric signal corresponding to the portion of said side surfaee being illuminated, means for eomparing the said eleetrie signals the one with respeet to the other, so as to generate a resulting signal whieh is used as a measure for the testing of the eigarette end.
From a still further broad aspeet, the present invention provides a method for the testing through optieal - inspeetion of eigarette ends, eomprising the steps of~
axially illuminating the end surfaee of the cigarette by a first souree of light having a eonstant intensity, and uti-lizing the light refleeted by the said end surfaee as a measure for the testing' illuminating a portion of the side surface of the same cigarette end by another source of light ~ - 4a -,~
, ~ .,-. , , perpendicular to said first source of light and having a constant intensity, providing a predetermined field of in-spection o-f which only one part covers said side surface, and utilizing the light reflected by the said side surface to compensate the variations of the said measure for the.
testing which are consequent to variations in the distance of the cigarette with respect to the said first source of light.
BRIEF DESCRIPTION OF IHE DRAWING :
These and other features of the invention and the resulting advantages will be better understood from the :
'~
,"
- 4b -.. , ~ - ' ' .
, : ' ' : . . , . , :.
16~488~!9 following detailed description of a preferred embodiment, diagrammatically illustrated in the attached drawing, in which the electronic part of the electric circuit is illustrated as a block diagram, each block indicating a component which is well known to a person skilled in the art.
DESCRIPTION AND OPERATIO~' OF THE PREFERRED EMBODIMENT
_ _ _ . . _ , , , With reference to the drawing, the optical cigarette end inspection device comprises a pair of optical fibre probes FOl and FO2, both arranged at the side of the end T of the cigarette S to be inspected, The end, or output head, of the probe FOl faces frontally the end T of the cigarette S. Said probe FOl presents a circular section the diameter of which depends upon the diameter of the cigarette being tested, and preferably consists of a plurality of intermingled light-emitting and light-receiving fibres.
- The other probe Fo2 also is made of a plurality of intermingled light-emitting and light-receiving fibres, and its end or output head presents a rectangular section with its greater side arranged parallely to the longitudinal axis of the cigarette, said greater side presenting such a length so that normally the probe end projects for a certain distance beyond the end T of the cigarette S, thus providing a field , of inspection of which only one part covers the side of the ; cigarette end. From the above it is apparent that the two probes FOl and FO2 are arranged orthogonally with respect to each other.
The bundle Ml of light-emitting fibres of the probe FOl conveys the light of a lamp Ll presenting a constant intensity of light, in the direction of the cigarette end T, and the bundle Rl of light-receiving fibres of the said probe ~134881)9 F01 picks up the light reflected by the said cigarette end T
and conveys same to a photoelectric transducer Sl, the output signal of which is applied to the input of amplifier Gl, the output of which is applied, in turn, to the input of a lin-earization circuit LNl. me linearization circuit LNl thus supplies an output voltage Vl which is proportional to the distance A between the end or head of probe F01 and the end T of the cigarette S. In this manner, the intensity of the light reflected by the cigarette end surface is converted into the electric signal Vl.
In an analogous manner, the light supplied by the lamp L2 (having a constant intensity of light) is conveyed, through the bundle M2 of light-emitting fibres of probe Fo2, ; towards the cigarette side, and a certain amount of said light is reflected by the cigarette paper forming the side of cigarette S, and picked up by the receiving fibres of the bundle R2 of the same probe F02. mis reflected light, the : intensity of which is proportional to the length B of the cigarette side which faces the field of inspection of the .' 20 probe, is transformed into an electric signal V2, by being . processed through photoelectric transducer S2, amplifier G2 and linearization circuit LN2. It appears evident that the thus obtained electric signal V2 is proportional to the said length B of cigarette side facing the probe F02, which length B depends from the actual length of the cigarette S, or its.
positioning on the conveying device (such as a fluted drum), or both, and which therefore is subject to variations (positive or negative) with respect to the predetermined rated length of the cigarette.
Signals Vl and V2 are applied to the input of an algebraic summing circuit SM, and particularly the signal V2 ' - - , . ~. ' ' ' , 1~4~8~9 i8 utilized, in said summing circuit, to compensate the signal Vl originating from probe F01, as for what concerns its com-ponent relating to the distance A between the head of said probe F01 and the end T of the cigarette S, the degree of filling of which is to be tested.
As a matter of fact, if the distance between the probe F01 and the cigarette end T increases, there takes place, in the same measure, a decrease of the length B of the paper ~ side facing the probe F02. Correspondingly, there takes place a decrease of the intensity of the light reflected by the end T, i.e. a decrease of the electric signal Vl, and a de-crease of the light reflected by the paper, which corresponds to a decrease of the signal V2.
Therefore, it is evident that, under the same condi-tions of the cigarette ends, that is when the said cigarette ends present a regular degree of filling, the difference between the two signals Vl and V2 remains constant for all . ~ .
cigarettes, independently from their axial positioning with respect to the probe F01, or from their length (that is to say, independently from the value of the distance A). The difference Vu between the two signals Vl and V2 is compared in a threshold circuit SG with a sample signal Vo.
It is therefore also evident that, for all regular cigarettes, such comparison will result in voltages Vu and ~- Vo of equal value, and no signal will be issued by the out-put of the threshold circuit SG.
If, on thecontrary, a cigarette presents some ': irregularity at it~ end T being tested, signal Vu, containing also the information relating to such irregularity, will deviate from the parity comparison with the sample signal Vo, thus causing the emission from the threshold circuit SG of a - 7 _ re~ect signal CS which will eventually cause the rejection of the defective cigarette.
It is believed that the invention will have been clearly understood from the foregoing detailed description of one preferred embodiment. Changes in the details of construction may be resorted to without departing from the spirit of the invention, and it is accordingly intended that no limitation be implied and that the hereto annexed claims be given the broadest interpretation to which the employed language fairly admits.
:,
The present invention relates to optical devices for inspecting the end of cigarettes which are delivered by cigarette-making machines in rows of cigarettes lying side by side and moving transversally tothe direction of their length.
; Particularly, but not exclusively, this invention relates to the inspection of cigarettes provided with a filter tip, and consequently the end inspection involves only the tobacco end.
The cigarette end inspection, in the optical devices, is based on the measurement of the light reflected by the cigarette end, which is illuminated with a constant intensity.
Obviously, this measurement presupposes that the distance between the optical measuring head and the surface of the cigarette end being tested remains constant for all the cigarettes, since a variation of this distance would cause an optical picking error which invalidates the test and consequently the rejection control promoted by said test.
,i ,!
~ow, even if the cigarettes to be tested are set with their filter ends perfectly aligned, the opposite ends S to be tested may not be equally aligned, because of a cer-tain cigarette cut tolerance range which, if admissible under other points of view, cannot be admitted in such a delicate test as the one effected by optical inspection.
The positive or negative deviations of the actual length of the finished cigarettes from a predetermined rated cigarette length can therefore be of prejudice to the accuracy of the cigarette end inspection.
: ~ 3 ~
., .
1~488~!9 The object of the invention is to provide an optical cigarette end inspection device which is not affected either by the axial displacement of the ciga-rettes in a row or by the possible variations of the cigarette length.
Substantially, the invention relates to an optical device which automatically inspects in suc-cession the ends of a cigarette row advancing along a preset path, this device including at least a pair of probes having groups of light-conveying or emitting optical fibres and groups of light-receiving or picking :
optical fibres, with the fibres of both groups preferably intermingled in each probe, one of said probes being oriented axially against the end surface of the cigarette -:
:~ to be tested, while the other is oriented laterally against the cigarette, perpendicularly to the longitudinal axis ;
of same, and extendsalong the side of the cigarette . so as to partially protrude beyond the cigarette end -.
to be tested, so that the variation of the reflected light, : 20 frontally picked up by the first mentioned probe, and whichdepends from the distance between the probe and the ciga-rette end, is accompanied by a correlative variation of ~:
the reflected light picked up by the side probe, in rela-tion to the actual length of the cigarette, or to an axial displacement of same, said correlative variation being used to discriminate from the component relative to an actual defect of the cigarette end, the component relative to a variation of length of the cigarette as compared to the predetermined rated length.
: 30 According to a further broad aspect, the present invention provides a device for testing through optical in-spection of cigarette ends, comprising: a first fixed " .
. - . ~ ' ' : ' .:
1~4t38~9 probe constructed of optical fibres and directed axially against the end surface of the cigarette to be tested, said first probe serving both for illuminating the said surface end and for picking the reflected light to convey it to a first photoelectric transducer connected to an electric circuit, for the conversion of the light reflected from the end surface of the cigarette into an electric signal presenting a component which corresponds to the distance between the said first probe and the cigarette end, "
a second fixed probe constructed of optical fibres and di-rected perpendieularly to the axis of the said first probe ~ and to the axis of the cigarette,said second probe serving both.~ for illuminating an inspection field of which only one part is provided by a portion of the side surface of the end of the cigarette to be tested, and for receiving the light reflected from the said portion of the side surface of the :
cigarette to convey it to a second photoelectric transdueer eonneeted to an eleetrie eireuit for the eonversion of the ; light reflected by the side surface of the eigarette into an electric signal corresponding to the portion of said side surfaee being illuminated, means for eomparing the said eleetrie signals the one with respeet to the other, so as to generate a resulting signal whieh is used as a measure for the testing of the eigarette end.
From a still further broad aspeet, the present invention provides a method for the testing through optieal - inspeetion of eigarette ends, eomprising the steps of~
axially illuminating the end surfaee of the cigarette by a first souree of light having a eonstant intensity, and uti-lizing the light refleeted by the said end surfaee as a measure for the testing' illuminating a portion of the side surface of the same cigarette end by another source of light ~ - 4a -,~
, ~ .,-. , , perpendicular to said first source of light and having a constant intensity, providing a predetermined field of in-spection o-f which only one part covers said side surface, and utilizing the light reflected by the said side surface to compensate the variations of the said measure for the.
testing which are consequent to variations in the distance of the cigarette with respect to the said first source of light.
BRIEF DESCRIPTION OF IHE DRAWING :
These and other features of the invention and the resulting advantages will be better understood from the :
'~
,"
- 4b -.. , ~ - ' ' .
, : ' ' : . . , . , :.
16~488~!9 following detailed description of a preferred embodiment, diagrammatically illustrated in the attached drawing, in which the electronic part of the electric circuit is illustrated as a block diagram, each block indicating a component which is well known to a person skilled in the art.
DESCRIPTION AND OPERATIO~' OF THE PREFERRED EMBODIMENT
_ _ _ . . _ , , , With reference to the drawing, the optical cigarette end inspection device comprises a pair of optical fibre probes FOl and FO2, both arranged at the side of the end T of the cigarette S to be inspected, The end, or output head, of the probe FOl faces frontally the end T of the cigarette S. Said probe FOl presents a circular section the diameter of which depends upon the diameter of the cigarette being tested, and preferably consists of a plurality of intermingled light-emitting and light-receiving fibres.
- The other probe Fo2 also is made of a plurality of intermingled light-emitting and light-receiving fibres, and its end or output head presents a rectangular section with its greater side arranged parallely to the longitudinal axis of the cigarette, said greater side presenting such a length so that normally the probe end projects for a certain distance beyond the end T of the cigarette S, thus providing a field , of inspection of which only one part covers the side of the ; cigarette end. From the above it is apparent that the two probes FOl and FO2 are arranged orthogonally with respect to each other.
The bundle Ml of light-emitting fibres of the probe FOl conveys the light of a lamp Ll presenting a constant intensity of light, in the direction of the cigarette end T, and the bundle Rl of light-receiving fibres of the said probe ~134881)9 F01 picks up the light reflected by the said cigarette end T
and conveys same to a photoelectric transducer Sl, the output signal of which is applied to the input of amplifier Gl, the output of which is applied, in turn, to the input of a lin-earization circuit LNl. me linearization circuit LNl thus supplies an output voltage Vl which is proportional to the distance A between the end or head of probe F01 and the end T of the cigarette S. In this manner, the intensity of the light reflected by the cigarette end surface is converted into the electric signal Vl.
In an analogous manner, the light supplied by the lamp L2 (having a constant intensity of light) is conveyed, through the bundle M2 of light-emitting fibres of probe Fo2, ; towards the cigarette side, and a certain amount of said light is reflected by the cigarette paper forming the side of cigarette S, and picked up by the receiving fibres of the bundle R2 of the same probe F02. mis reflected light, the : intensity of which is proportional to the length B of the cigarette side which faces the field of inspection of the .' 20 probe, is transformed into an electric signal V2, by being . processed through photoelectric transducer S2, amplifier G2 and linearization circuit LN2. It appears evident that the thus obtained electric signal V2 is proportional to the said length B of cigarette side facing the probe F02, which length B depends from the actual length of the cigarette S, or its.
positioning on the conveying device (such as a fluted drum), or both, and which therefore is subject to variations (positive or negative) with respect to the predetermined rated length of the cigarette.
Signals Vl and V2 are applied to the input of an algebraic summing circuit SM, and particularly the signal V2 ' - - , . ~. ' ' ' , 1~4~8~9 i8 utilized, in said summing circuit, to compensate the signal Vl originating from probe F01, as for what concerns its com-ponent relating to the distance A between the head of said probe F01 and the end T of the cigarette S, the degree of filling of which is to be tested.
As a matter of fact, if the distance between the probe F01 and the cigarette end T increases, there takes place, in the same measure, a decrease of the length B of the paper ~ side facing the probe F02. Correspondingly, there takes place a decrease of the intensity of the light reflected by the end T, i.e. a decrease of the electric signal Vl, and a de-crease of the light reflected by the paper, which corresponds to a decrease of the signal V2.
Therefore, it is evident that, under the same condi-tions of the cigarette ends, that is when the said cigarette ends present a regular degree of filling, the difference between the two signals Vl and V2 remains constant for all . ~ .
cigarettes, independently from their axial positioning with respect to the probe F01, or from their length (that is to say, independently from the value of the distance A). The difference Vu between the two signals Vl and V2 is compared in a threshold circuit SG with a sample signal Vo.
It is therefore also evident that, for all regular cigarettes, such comparison will result in voltages Vu and ~- Vo of equal value, and no signal will be issued by the out-put of the threshold circuit SG.
If, on thecontrary, a cigarette presents some ': irregularity at it~ end T being tested, signal Vu, containing also the information relating to such irregularity, will deviate from the parity comparison with the sample signal Vo, thus causing the emission from the threshold circuit SG of a - 7 _ re~ect signal CS which will eventually cause the rejection of the defective cigarette.
It is believed that the invention will have been clearly understood from the foregoing detailed description of one preferred embodiment. Changes in the details of construction may be resorted to without departing from the spirit of the invention, and it is accordingly intended that no limitation be implied and that the hereto annexed claims be given the broadest interpretation to which the employed language fairly admits.
:,
Claims (3)
1. A method for the testing through optical inspection of cigarette ends, comprising the steps of:
a) axially illuminating an end surface of a ciga-rette by a first source of light having a constant intensity, and utilizing the light reflected by the said end surface as a measure for the testing;
b) illuminating a portion of the side surface of the same cigarette end by another source of light perpendicular to said first source of light and having a constant intensity, providing a predeter-mined field of inspection of which only one part covers said side surface, and utilizing the light reflected by the said side surface to compensate the variations of the said measure for the testing which are consequent to variations in the distance of the cigarette with respect to the said first source of light.
a) axially illuminating an end surface of a ciga-rette by a first source of light having a constant intensity, and utilizing the light reflected by the said end surface as a measure for the testing;
b) illuminating a portion of the side surface of the same cigarette end by another source of light perpendicular to said first source of light and having a constant intensity, providing a predeter-mined field of inspection of which only one part covers said side surface, and utilizing the light reflected by the said side surface to compensate the variations of the said measure for the testing which are consequent to variations in the distance of the cigarette with respect to the said first source of light.
2. A method according to claim 1, in which the light reflected by the cigarette end surface and the light reflected by the portion of the side surface of the cigarette are trans- formed into electric signals, said electric signals being com-pared in algebraic relationship the one with the other, so as to generate a resulting signal which is used as a measure for the testing of the cigarette end.
3. A device for the testing through optical inspection of cigarette ends, comprising:
a) a first fixed probe constructed of optical fibres and directed axially against an end surface of a cigarette to be tested, said first probe serving both for illuminating the said surface end and for receiving the reflected light to convey it to a first photoelectric transducer connected to an electric circuit, for the conversion of the light reflected from the end surface of the cigarette into an electric signal presenting a component which cor-responds to the distance between the said first probe and the cigarette end;
b) a second fixed probe constructed of optical fibres and directed perpendicularly to the axis of the said first probe and to the axis of the cigarette, said second probe serving both for illuminating an inspection field of which only one part is provided by a portion of the side surface of the end of the cigarette to be tested, and for receiv-ing the light reflected from the said portion of the side surface of the cigarette to convey it to a second photoelectric transducer connected to an electric circuit for the conversion of the light reflected by the side surface of the cigarette into an electric signal corresponding to the por-tion of said side surface being illuminated;
c) means for comparing the said electric signals the one with respect to the other, so as to generate a resulting signal which is used as a measure for the testing of the cigarette end.
a) a first fixed probe constructed of optical fibres and directed axially against an end surface of a cigarette to be tested, said first probe serving both for illuminating the said surface end and for receiving the reflected light to convey it to a first photoelectric transducer connected to an electric circuit, for the conversion of the light reflected from the end surface of the cigarette into an electric signal presenting a component which cor-responds to the distance between the said first probe and the cigarette end;
b) a second fixed probe constructed of optical fibres and directed perpendicularly to the axis of the said first probe and to the axis of the cigarette, said second probe serving both for illuminating an inspection field of which only one part is provided by a portion of the side surface of the end of the cigarette to be tested, and for receiv-ing the light reflected from the said portion of the side surface of the cigarette to convey it to a second photoelectric transducer connected to an electric circuit for the conversion of the light reflected by the side surface of the cigarette into an electric signal corresponding to the por-tion of said side surface being illuminated;
c) means for comparing the said electric signals the one with respect to the other, so as to generate a resulting signal which is used as a measure for the testing of the cigarette end.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT1263275A IT1033891B (en) | 1975-06-03 | 1975-06-03 | OPTICAL DEVICE FOR CHECKING THE FILLING DEGREE OF CIGARETTE HEADS |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1048809A true CA1048809A (en) | 1979-02-20 |
Family
ID=11142354
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA76253882A Expired CA1048809A (en) | 1975-06-03 | 1976-06-02 | Optical cigarette end inspection device |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS5220855A (en) |
| CA (1) | CA1048809A (en) |
| DE (1) | DE2625001C2 (en) |
| FR (1) | FR2312975A1 (en) |
| GB (1) | GB1515775A (en) |
| IT (1) | IT1033891B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7793664B2 (en) | 2005-07-01 | 2010-09-14 | Tews Elektronik Dipl.-Ing. Manfred Tews | Apparatus and method for detection and segregation of faulty cigarettes |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2840617C2 (en) * | 1978-09-18 | 1987-04-09 | Hauni-Werke Körber & Co KG, 2050 Hamburg | Method and device for testing rod-shaped articles of the tobacco processing industry |
| DE3146506A1 (en) * | 1981-11-24 | 1983-06-01 | Maschinenfabrik Alfred Schmermund Gmbh & Co, 5820 Gevelsberg | METHOD AND TEST DEVICE FOR CHECKING THE LEVEL OF FILLING OF CIGARETTE ENDS |
| DE3146507A1 (en) * | 1981-11-24 | 1983-06-01 | Maschinenfabrik Alfred Schmermund Gmbh & Co, 5820 Gevelsberg | DEVICE FOR CHECKING THE LEVEL OF FILLING OF CIGARETTE ENDS. |
| DE3638519A1 (en) * | 1986-11-11 | 1988-05-19 | Focke & Co | METHOD AND DEVICE FOR CHECKING / DISCARDING CIGARETTES |
| IT1257317B (en) * | 1992-03-04 | 1996-01-15 | Sasib Spa | "METHOD AND CONTROL DEVICE WITHOUT DIRECT CONTACT OF THE DEGREE OF FILLING THE CIGARETTE HEADS" |
| IT1263446B (en) * | 1993-06-28 | 1996-08-05 | Gd Spa | OPTICAL CONTROL METHOD FOR CIGARETTE FILLING. |
| IT1286264B1 (en) * | 1996-10-18 | 1998-07-08 | Gd Spa | METHOD OF CHECKING THE DEGREE OF FILLING OF THE ENDS OF SMOKING ARTICLES |
| US6169600B1 (en) | 1998-11-20 | 2001-01-02 | Acuity Imaging, Llc | Cylindrical object surface inspection system |
| BR112018009948A8 (en) * | 2015-12-21 | 2019-02-26 | Philip Morris Products Sa | apparatus and method for obtaining data relating to a dimension of an elongated object |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1884252U (en) * | 1961-09-14 | 1963-12-05 | Kurt Dr Koerber | MACHINE FOR MANUFACTURING A CONTINUOUS STRAND OF CIGARETTES. |
| FR1593511A (en) * | 1968-05-16 | 1970-06-01 | ||
| US3729636A (en) * | 1971-09-03 | 1973-04-24 | Brown & Williamson Tobacco | System for detecting loose tobacco at cigarette ends |
| GB1388189A (en) * | 1972-06-29 | 1975-03-26 | Gallaher Ltd | Optical inspection apparatus |
| US3818223A (en) * | 1973-03-08 | 1974-06-18 | Liggett & Myers Inc | Device for detecting carbon on cigarette filter tips |
| US3812349A (en) * | 1973-04-06 | 1974-05-21 | Laser Sciences Inc | Apparatus for inspecting cigarettes or the like |
| IT1010706B (en) * | 1974-03-22 | 1977-01-20 | Amf Sasib | PROCEDURE AND DEVICE FOR THE OPTICAL CHECK OF THE FILLING DEGREE OF THE CIGARETTE HEADS |
-
1975
- 1975-06-03 IT IT1263275A patent/IT1033891B/en active
-
1976
- 1976-06-01 FR FR7616482A patent/FR2312975A1/en active Granted
- 1976-06-02 CA CA76253882A patent/CA1048809A/en not_active Expired
- 1976-06-03 GB GB2295676A patent/GB1515775A/en not_active Expired
- 1976-06-03 JP JP51065090A patent/JPS5220855A/en active Granted
- 1976-06-03 DE DE19762625001 patent/DE2625001C2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7793664B2 (en) | 2005-07-01 | 2010-09-14 | Tews Elektronik Dipl.-Ing. Manfred Tews | Apparatus and method for detection and segregation of faulty cigarettes |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1033891B (en) | 1979-08-10 |
| DE2625001A1 (en) | 1976-12-16 |
| JPS5220855A (en) | 1977-02-17 |
| DE2625001C2 (en) | 1986-02-06 |
| JPS5632907B2 (en) | 1981-07-30 |
| FR2312975B1 (en) | 1984-04-20 |
| FR2312975A1 (en) | 1976-12-31 |
| GB1515775A (en) | 1978-06-28 |
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