DE2148282A1 - Magnetic ink pen - Google Patents

Description

Magnetic ink pen

The invention relates to an ink pen for magnetic ink

In known ink pens, moving printing types are provided with which characters can be written that of an embossing correspond to the respective printing type · These known ink pens thus require moving types and with them only those characters can be written for which the corresponding types are available

The object of the invention is to design an ink pen of the type mentioned at the outset in such a way that movable types or other mechanical elements to be moved for the type application in the interest of a high writing speed are needed. The invention is characterized »that an ink nozzle that can be connected to an ink supply, which under mutual axial alignment with respect to an electromagnet on a recording strip is provided and the ink nozzle with electromagnet on the one hand and recording strip on the other hand can be moved relative to one another. According to the invention, taking advantage of the magnetic

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Properties of the ink the ink for writing through a Electromagnetic field pulled out of the ink nozzle. Mechanically moving parts are not required »With such an ink nozzle in connection with an electromagnet can with pulsed excitation of the electromagnet a point can be written in each case or, if the electromagnet is continuously excited, a line is written if the recording strip opposite the ink nozzle is moved with the electromagnet · In this way, any Write rasterized characters «

The expulsion of the ink from the nozzle at the moment of a desired recording and only then can be promoted with a Further development, which is characterized in that the ink nozzle consists of non-convertible material and with at least an excitation coil whose magnetic field penetrates the magnetic ink contained in the ink nozzle * With a magnetic field in the ink provided for the job this can be pre-magnetized, held or supported the magnetic field of the opposing electromagnet can be driven out

A preferred embodiment is characterized by an alternating magnetic field generated by an exciter coil in the magnetic ink to suppress the adhesive friction during ink expulsion · Such an alternating field is generated in the provided Ink a pulsation »is reduced by the adhesive friction of the ink on the nozzle wall and also inside the ink the fluidity of the ink is thus promoted · By inducing this alternating magnetic field for the Moment of ejection of the ink from the nozzle »that is, simultaneously with the excitation of the electromagnet arranged opposite, is the expulsion of a portion of ink for the purpose of recording

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favored · A similarly beneficial effect achieves a Another further development, which is characterized by a first excitation coil arranged on the exit-side end of the ink nozzle and a second exciting coil disposed further retreated relative to that in the magnetic ink generated magnetic fields are polarized opposite to each other and excited with a direct excitation current to the ink outlet

The two training courses just mentioned can also be implemented in combination.

A preferred embodiment of the invention, which allows, with only a linear relative movement, a complicated under certain circumstances Writing down shaped characters in the form of a dot grid is characterized by the grid-like arrangement of several electromagnets in a common magnetic head versus a storage container arrangement with storage containers in the same Caster arrangement like the electromagnets, each of which can be filled with a portion of magnetic ink · For recording one Characters are then excited in each case those electromagnets, based on their grid-like arrangement, within the The writing surface of the character to be written.

In addition to the advantages mentioned at the outset, the following advantages that can be achieved with the invention are also noteworthy: The recording according to the invention can take place noiselessly · it can be carried out in such a way that it does not require any photographic or other Fixing processes requires · It can be made by suitable selection of the ink so that the writing afterwards optically readable or not optically readable «The ink release can only be achieved by electrical excitation impulses which are provided in the Coils of the electromagnets and, if necessary, the nozzles arrive, can be controlled «The ink writing can with very high speed and with very great delicacy, i.e. with

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high character density

The invention will now be described in more detail with reference to the accompanying drawing explained

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In the drawing showsι

Figure 1 Figure 2

Figure 3 Figure 4

Figure 5

Figure 6

Figure 7

in the block diagram schematically an ink pen according to the invention,

a first preferred embodiment of the recording part from Figure 2 »-

the nozzle of another recording part cut »

another preferred embodiment of the recording part from Figure 1,

the recording part from Figure 4 with drive means for moving the same opposite the recording paper strip,

an ink pen according to the invention schematically with a Variety of grid-like

t. ordered.! Electromagnets and the associated supply

■: containers,

Above, a detailed view of the trough arrangement on the circumference of the drum from FIG. 6 is stylized, and below, also a stylized, fragmentary view of the grid-like arrangement of the end faces of the electromagnets from FIG. 6,
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FIG. 8 shows a detail in section

Head in which the intended electromagnets are embedded »

FIG. 9 shows a further exemplary embodiment

an ink pen according to the invention having a plurality grid-like arranged electromagnet and these associated storage containers and

Figure 10 stylizes an ink pen

according to the invention in operation

According to FIG. 1, magnetic ink passes from the ink tank 2 to the recording part 1. A control part 3 controls nozzles or a magnetic head of the recording part 1, so that magnetic ink comes on the recording paper 4 and with this ink Letters and other characters are written on the paper. Denoted at 5 is a drive part which drives the recording paper in a predetermined sighting on the recording part 1 passes by

An exemplary embodiment of the recording part t is shown in FIG · According to Figure 2, magnetic ink 6 is filled into the nozzle 7. · The nozzle 7 is wound with a coil 8. With 9 a magnetic core is referred to, which is axially directed to the nozzle 7 and on which a coil 10 is wound so that the uern 9 forms an electromagnet 11 with the coil 10 · During operation, the coil 8 has a direct current flowing through it, whereby the magnetic ink 6 is magnetized. A current pulse in the

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Coil 10 energizes the electromagnet 11, which thereupon a portion pulls magnetized magnetic ink 6 out of the nozzle 7 Recording paper 4 becomes of the drawn out portion of ink hit «which marks a point there · If you simultaneously place the recording paper 4 on the one hand opposite the nozzle 7 and the On the other hand, when the electromagnet 11 is moved, characters can be written on the recording paper 4 with the extracted portions of ink. A plurality of nozzles 7, each with associated electromagnets 11 side by side transversely to the transport direction of the recording paper to the paper in to be able to label its entire width, even if it is only transported in one direction of movement · Man can of course also combine several nozzles 7 with the associated electromagnets 11 into one structural unit each by a nozzle 7 and an electromagnet

11 formed recording heads are preferably separately excitable to deliver a portion of ink

Instead of energizing the coil 8 with direct current, it can also be energized with alternating current to remove the magnetic flux To favor ink when the electromagnet 11 is energized. One can such an alternating current in the coil 8 a magnetizing Superimposing direct current · In practice, one controls the exciting pulsed direct current of the electromagnet 11, a biasing magnetizing one Direct current of the coil 8 and an alternating current of the coil 8 superimposed thereon so that optimal recording takes place. The best current values can be found by trying if necessary.

Figure 3 shows another embodiment. In Figure 3 is with

12 denotes a nozzle which is filled with magnetic ink 13 is · With 14 a coil is designated * at its connections

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15 Direct current and alternating current are fed in · In addition is a second coil 16 around the one shown in Figure 3 below The nozzle's spout is wound »whose connections are marked 17 · The coil 14 is supplied with direct current and This superimposed alternating current is excited, then a static magnetic field is superimposed on an alternating field is generated in the magnetic ink 13 The magnetic ink then oscillates in the axial direction

Since the dynamic friction between the magnetic ink 13 on the one hand and the inside of the wall of the nozzle 12 on the other hand and between the granules of the magnetic ink 13 is smaller than the static friction that would be decisive without the oscillating magnetic field, the outflow of the magnetic ink 13 is through the alternating current excitation of the coil 14 favors. If a magnetic field is now generated in the tip of the nozzle 12 by means of the coil 16, which has the opposite polarity as the constant field coraponents of the magnetic field generated by the coil, then a repulsive force arises which drives out the ink particles furthest from the orifice be hit on a recording paper held in front of it and leave a mark there, which can be controlled by the currents flowing in the coils 14 and 16.

Nozzles 7 and 12 have coils that are wound around the nozzles.Such coils are then not required, when a sufficient magnetic field is generated by a magnet outside the nozzle that is capable of dispensing portions of ink out of the nozzle. A corresponding exemplary embodiment is shown in FIG. In Figure 4 there are only parts which are also shown in FIG. 2, and these parts are denoted by the same reference numerals as in FIG * The core 9 of the magnet ti is triggered by a current pulse

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in the coil 10 is energized · The resulting magnetic field is in the region of the tip of the nozzle 7 .herauszuziehen enough large to take up an ink portion of the magnetic ink 6 _t is then incident on the recording paper. 4

The nozzles 7 and 12 are made of non-magnetizable material. The nozzles 7 and 12 and also the electromagnets η can do a lot be small and fine »so that correspondingly small portions of ink are expelled and a very fine writing is possible.

Figure 5 shows an embodiment of the drive part S from Figure 1. In Figure 5, 18 and 19 are two guide spindles denotes "which are arranged parallel to one another on opposite sides of the recording paper 4 and are the same Drehgeschvindigkeit can be driven to rotate about its longitudinal axis. With 20 and 21 two supports are designated with one Threaded hole (not shown) into which the guide spindles 18 and 19 are screwed · An The nozzle 7 is mounted on the support 20 and the electromagnet 11 is mounted on the support 21. The supports 20 and 21 are slidably guided on guide rails 22 and 23 which extend parallel to the ' Guide spindles 18 and 19 extend. The Oevindegange of the two guide spindles 18 and 19 are equal »so that with the same Speed of both spindles 18 »19 the supports 20 and 21 move at the same speed and the nozzle 7 to the electromagnet 11 remains constantly axially aligned »while the Supports 20 and 21 together on the guide rails 22 and 23, respectively, compared to the stationary or moving one Recording paper 4.

In one embodiment, there are preferably always several Nozzles 7 and magnets 11 provided · These nozzles 7 on the one hand and the magnets 11 on the other hand of an embodiment

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can be combined to form a structural unit, as is the case with the exemplary embodiments in FIGS. According to In FIG. 6, reference numeral 25 denotes a magnetic head which has a plurality of magnets 11 as shown in FIG. in a row next to one another in the direction transverse to the transport direction of the recording paper 4. The drive part 5 is formed by two coils on which the strip-shaped Recording paper can be wound up.

On the opposite side of the recording paper 4 Magnetic head 25 a roller 26 is arranged, which is at least as wide in the axial direction as the recording paper 4 · The roller is driven to rotate in the direction of the arrow, so that the The circumferential speed is exactly the same as the transport speed of the recording paper 4 · The circumference of the roller is provided with a honeycomb embossing 27 as it is visible in Figure 7 above · The individual in Figure 7 above as The honeycombs 27A, 27B, 27C ··· shown in a plan view of the circumference of the roller 26 are delimited hexagonally and recessed in the middle for receiving a small portion of ink from the ink supplier generally designated 28

The individual sheet magnets HA, 11B, nc ... those in the magnetic head 25 are combined, as indicated below in FIG return to a position centered on the honeycombs 27A, 27B ..., as it is indicated by dashed lines in FIG. 7 above · This Centered position of the magnets 11A, 11B shown above in FIG. 7, 11C ... on the one hand to the honeycombs 27A, 27B ··· on the other hand results only ever in very specific angular positions of the roller 26 the with the uniform rotation of the roller 26 at equal time intervals repeat.

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The magnets 11A, 11Β “11C ··” are, as can be seen in FIG. 8, embedded in an embedding compound, preferably thermoplastic plastic the magnetic cores 9 which are wound with the coils 10. In a preferred embodiment, geoäB Figure 8, the diameter of the cores is O ₉ 1 millimeters and the honeycomb structure on the circumference of the drum is correspondingly fine, so that the lettering can be done with a very fine grid · For labeling, the individual magnets IiA, IfB ₉ 11C ... are excited and always when they are axially aligned with the honeycombs 27A, 27B ··.

The ink supplier 28 ″ is rotatable coaxially with the roller 26 mounted ink transfer roller, which is immersed in the ink 6 contained in an open ink tank 30 and with its periphery rolls on the axial part of the periphery of the roller 26 involved in the recording absorbs ink as it circulates and applies it to the circumference of the roller 26, "o the ink is in the honeycomb of the embossing 27 lasts until it is called up in portions from the individual honeycombs by the magnetic head 25 ·

In the embodiment of Figure 9 is instead of the roller 26 from FIG. 6, a cuboid ink container 32 is provided, the bottom of which is formed by a porous layer 33 to which a nozzle plate 31 adjoins at the bottom the porous layer 33 to the strip of the recording paper 4 facing side of the nozzle plate 31 extend and have a hexagonal cross-section and honeycomb as shown in Figure 7 above, are arranged close to each other · The individual tubes or nozzles are equipped with an excitation coil corresponding to the

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The excitation coil 8 from FIG. 2 is wound around that in FIG. 9 of the overview are not shown for the sake of sake and which can be individually connected to an excitation voltage source

The magnetic head 25 arranged opposite the ink container 32 is designed in exactly the same way as the magnetic head 25 from FIGS 8, the individual electromagnets being precisely aligned axially with the nozzles or tubes of the nozzle plate 31 and every tube has an electromagnet

3 individual electromagnets are used for recording via the control unit of the magnetic head 25 in the arrangement or the Grid of a character to be written excited, and in this grid ink portions are pulled out of the nozzle plate 31 " the ink from the ink container 32 can always flow through the porous layer 33 · The expulsion of the ink portions can be assisted by energizing the coils of the respective tubes of the nozzle plate 31 in the same grid pattern.

The recording paper 4 is made in the same manner as in FIG Figure 6 shown, passed between the nozzle plate 31 on the one hand and the magnetic head 25 on the other hand "

According to FIG. 10, 35 denotes a recording paper strip which moves past a recording part 36 in the direction of the arrow The recording part 36 has a plurality of nozzles 37 and a corresponding plurality of electromagnets which are assigned to the individual nozzles. An electrical excitation signal is sent to the relevant person for recording Electromagnet, and the associated nozzle emits a portion of ink to the recording paper strip 35, so that a recorded Grid pattern 38 can result

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It is essential and advantageous that according to the invention the in de ?? Ink nozzle contained ink with the recording paper none Does not come into contact with the recording paper until it is ejected from the nozzle for writing.

The inventive ink pen is particularly advantageous because with simple means you can write very quickly and with a very high character density »It is also noteworthy that that instead of individual portions of ink, which then each form a point, »a longer flow of ink through the appropriate Can draw excitation of the coils involved from a nozzle »so that a line appears on the paper strip that is passed by

The lettering applied with ink markers according to the invention can be read out magnetically or optically · But you can also write with invisible magnetic ink » so that an optical reading is prevented. Finally, one can do that made with an ink pen according to the invention Cover the recording with an optically opaque layer »so that this recording can no longer be read optically can only be magnetic

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Claims (6)

JH P 30 901 09/22/71 EXPECTATIONS / "Π Ink pen for magnetic ink, characterized by an ink nozzle (7) which can be connected to an ink supply and which, with mutual axial alignment with respect to a Electromagnet {11) is directed to a recording strip (4) and ink nozzle with electromagnet on the one hand and recording strips, on the other hand, relative to each other are movable. 2. Ink pen according to claim 1, characterized in that the ink nozzle (7) consists of non-magnetizable material and with at least one excitation coil (8, 14, 16) is wrapped, the magnetic field of which penetrates the magnetic ink (6, 13) contained in the ink nozzle (7) 3 · Ink pen according to claim 2 »characterized by a alternating magnetic field generated by an excitation coil (14) in the magnetic ink to suppress the adhesive Friction during ink ejection 209824/0901 - £ - P 30 901 4. Ink pen according to claim 2 or 3 _t characterized by a arranged on the outlet end of the ink nozzle first excitation coil (16) and a fourth retracted arranged second excitation coil (14) »the, based on the magnetic fields generated in the magnetic ink (13) each other with opposite polarity and excitation direct current to the ink outlet. 5. Ink pen according to one of the preceding claims «characterized by the grid-shaped arrangement of several electromagnets (11) in a common magnetic head (25) opposite a storage container arrangement (27) with storage containers in the same grid arrangement as the electromagnets * each of which can be filled with a fortion of magnetic ink 6. Ink pen according to claim 5 »characterized in» that the storage containers are troughs (27) in the circumference of a roller (26) that can be driven in rotation, the circumference of which occurs with each revolution wetted with magnetic ink (6) by an ink supplier (28). 7 · Ink pen according to claim 5 »characterized in that the storage container arrangement (31) has a plurality of coaxial having juxtaposed nozzles which, with the interposition of a porous layer (33) to a common tank filled with magnetic ink are connected * 209824/090 Blank page