DE2163664A1 - Magnetic ink printing device - Google Patents

Description

DIPL.-PHYS. ROBERT MÜNZHUBER

PATENT LAWYERS

β MUNICH 22 WIDENMAYERSTRASSE 6 TEL. (Ο811) 22 25 30-29 5192

December 21, 1997I Our reference: A 412 7I / Ml / La

Company KOKUSAI DENSHIN DENWA KABUSHIKI KAISHA, 24/25, Kasumigaseki Bldg., 2-5, 3-Chome, Kasumigaseki, Chiyoda-Ku, Tokyo-To, Japan.

Magnetic ink printing device

The invention particularly relates to printing apparatus using magnetic ink a printing device with which characters, drawings, coded signals or other patterns on a printing paper is applied in the form of magnetic information.

There are already printing techniques of the following type known, (I) writing by hand using magnetic ink,

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(2) transfer printing using a magnetic transfer paper, (3) writing with a typewriter using a magnetic writing tape; and (4) printing using a printer using the application of magnetic ink. The techniques listed under (1) and (2) are beneficial insofar as patterns are any desired Form can be printed, but have the disadvantage that the printing is slow and each time individual Differences occur. These disadvantages do not occur with the techniques named under (j5) and (4), but do these can only be used to print certain predetermined patterns. So the conventional techniques are for printing any desired pattern at high speed, such as visual recording in dependence from a received signal similar to the magnetic facsimile.

The object of the invention is to provide a precision magnetic printing device to create that due to no significant mechanical noise and at high speed small input signals to record desired patterns in is able to.

The principle, structure and operation of the

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Apparatus according to the invention can now be as follows Description of exemplary embodiments can be clearly seen from the figures of the drawing. Show it:

Fig. I ₃ 2A and 2B partial side views, on hand

which the basic principle of the invention is described;

3 and 4 are perspective views of two

different embodiments;

Figs. 5A and 5B are perspective views and Figs

Individual sections in the exemplary embodiments according to FIG. 3 and 4 elements used;

Fig. 6 is a perspective view ei

Another embodiment of the invention;

Fig. '[ Again, each embodiment

according to the invention in perspective view;

8A shows a further embodiment

the device according to the invention in a perspective view;

FIGS. 8b and 3C are plan views of an element of FIG

operation shown in FIG. 8A; and

Fig. Bd the side view of a modified Embodiment of the device example shown in Fig. 8A.

In Fig. 1, a pressure element is shown as it is used in the device according to the invention and that from

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a needle-shaped tube 1 in which a magnetic ink 2 containing magnetic powder is placed. An electromagnet is through a rod core 3 and a winding 4 wound around the core 3 is formed. Between the lower end of the tube 1 and the upper end of the rod core 3, printing paper 5 is inserted. The axes of the tube 1 and the rod core 3 are aligned with one another. If a pulse is now applied to the winding 4, the rod core 3 is only magnetized for the duration of the pulse, so that the magnetic core 3 attracts the magnetic ink through the small opening at the lower end of the tube 1 and thus prints a dot on the surface of the printing paper 5.

In Fig. 2A another pressure element is shown, which can be used in the device according to the invention and also has a needle-shaped tube 1, in which magnetic ink 2 is located. In addition, a permanent magnet 3 is provided and a winding 4 around the Tube 1 wound. The mutual positions of tube 1 and magnet 3 are as shown in FIG. 1. The magnetic Ink 2 is magnetized for the duration of a pulse supplied to winding 4. The direction of magnetization will ΰμΓΟίι be the polarity of the pulse

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it's correct. While in this case a positive current constantly flows through the winding in order to prevent the magnetic ink 2 from being drawn from the permanent magnet to the paper 5, a negative pulse can be applied to the winding 4, causing a Dot is printed on the printing paper 5 by means of the magnetic ink 2. In other words, since the field of the permanent magnet 3 is superimposed and balanced by the magnetic field caused by the positive permanent current, which of course counteracts the field of the permanent magnet, no magnetic ink 2 is drawn in the direction of the printing paper 5. However, when the direction of magnetization of the magnetic ink 2 is reversed due to the negative pulse, magnetic ink 2 spurts onto the printing paper 5 from the lower opening of the tube 1.

In a further exemplary embodiment shown in FIG. 2B an additional winding 4a is provided, in which a direct current that generates an opposing field constantly flows.

However, it is also in the case where there is no counter-cocurrent flows, possible to keep the intensity of the permanent magnet 3 low, so that in the one shown in FIG. 2A

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In the example shown, no magnetic ink 2 leaks out. The magnetic ink 2 is then only for the duration of the applied pulse is ejected.

As a basic principle of the invention, it can be seen that the magnetic ink, the magnetic powder of high permeability in itself, in a needle-shaped Tube unfold and spray onto the surface of a printing paper when triggered by a control pulse a magnetic force is exerted. The control pulse is fed to a winding on a rod core or sit on the pipe itself, while the pipe and the rod core (or a permanent magnet) are so arranged are that their axes are aligned and they are above or below the printing paper.

In order to be able to record a magnetic pattern such as a magnetic character, a magnetic one Drawing, a magnetic digital signal, etc., the printing paper 5 is in constant speed one direction, while the tube and the rod core or magnet 3 are drawn in a direction perpendicular to the direction of movement of the printing paper 5 are moved. At the same time the winding 4 to generate the magnetic

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Pattern control pulses are supplied, the pattern then being created by dots of the magical ink 2 on the surface of the Printing paper 5 is generated.

In Fig. 3 an embodiment of such a device according to the invention is shown in which a drum 7 is present, which consists of a in Pig. The sieve panel 11 shown in FIG. 5A consists and has a number of small depressions 12 on the surface, as FIG. 5A also shows. In contact with this drum 7, a paint drum 8 rotates, and a doctor blade 9 is provided to scrape off the magnetic ink or paint 2 located on parts of the surface of the drum adjacent to the depressions 12. The magnetic ink 2 is transferred from the ink drum 8 to the surface of the drum 7 and then scraped off by the squeegee 9 except for the depressions 12 before each line of depressions 12 faces the printing paper 5. The winding of an electromagnet J ¹ are then fed to the control pulses, while its core 3 is moved in the direction of the groove line 12 perpendicular to the moving direction of the printing paper. 5 The speed of rotation of the drum 7 and the speed of movement of the core 3 with the winding ^ are to be coordinated so that the core 3 all wells 12 one

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Line can be placed opposite, as long as this line with the depressions 12 is opposite to the printing paper 5 is located. If a number of electromagnets 5 are used, so that each hole 12 of a row is an electromagnet faces, and then control pulses corresponding to the desired pattern of the individual windings 4 of these Electromagnet 5 fed, so the rotational speed the drum 7 can be increased significantly. In all of these cases, the desired pattern can be printed on the printing paper 5 can be generated in the form of groups of magnetic paint splashes.

In Figs. 4 and 5B, a further embodiment of the invention is shown, which a thin plate 7 (Ij5) with a row of small holes 14 has a spongy Block 10, which is glued to this thin plate 7, and an FBrbtopf 8 with a lid. The magnetic Paint 2 is dispensed from holes in the bottom of the paint pot onto the sponge block 10, whereby the small holes 14 the plate 7 are filled. The electromagnet (j5 / 4) will moves back and forth in the direction of the small holes of the line on the underside of the printing paper 5.

In Fig. 6 is a further embodiment of the

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Invention shown according to the on hand of the Pig. 2A has a number of tubes 1 with single turns L ₁ , L ₂ , _{L 1, L 2} ^ and L ₁ - opposite which a permanent magnet plate J5 is arranged. The windings L ₁ to L, - are independent of each other
Control impulses supplied.

In FIG. 7, the further exemplary embodiment of the invention shown therein has an endless, thin belt IJ which is driven by a pair of drive rollers 15, 15a on the upper side of a printing paper 22. On the bottom
of the printing paper 22, another belt 20 is driven via a pair of drive rollers 16, 16a, and a control winding 41 is wound around a spool 42. The magnetic color
is fed onto the lower edge 24 of the thin belt 17 by means of a transfer roller 2j5 which is immersed in a paint container 18. A scraper I9 ensures that only
the appropriate amount of magnetic paint remains on edge 24. Electromagnet 21, that is, current flowing in series through a winding 4o on the endless belt 20
excited are attached to this strap. In the example of FIG. 7 there are three electromagnets. The current flow in the winding 40 comes about by induction,
which is produced by a control pulse current in the winding 41

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is called. In this case, only one of the excited magnets 21 attracts magnetic ink, which is located on the lower edge 24, onto the printing paper 22. It can Thus, a desired pattern can be generated on the printing paper 22 when the paper is in the direction indicated by the arrow Direction is pulled during the winding Hl control pulses are fed. The rollers 15 and 15a and 16, respectively and 16a are driven in the usual way, which hler is not shown in detail.

Another embodiment of the invention can be seen in FIG. 8A, an endless but sieve-shaped belt 25 being provided, which is "guided along" pulleys 26a, 2bb, 26c and 26d on the upper side of a printing paper 22 and runs in one direction, as indicated by arrows. An endless belt 50, which is guided over a deflection roller J> ^ and a further deflection roller (not shown), as well as a winding 41 wound on a spool 42 are also provided. under which the endless belt 25 is passed. A scraper ^ 4 removes excess paint from the belt so that the paint is only in the meshes of the sieve belt 25. The exciting parts on the underside of the printing paper 22

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correspond to those from Pig. J. The scraper 34 is generally a plate as shown in Figure 8C. If an endless thin belt 25 is used instead of a sieve belt, a comb-shaped scraper 34a as shown in Fig. 8B can also be used. In this case, a number of electromagnets 3 ~ i are arranged on the underside of the printing paper 22 so that. they oppose the colored stripes 36 on the thin belt 25, which the comb-shaped scraper 3 ^ a stands, as indicated in Fig. 8D. Control pulses corresponding to a desired pattern are applied to the windings of the magnets Jl so that the desired pattern is represented on the paper 22 by colored dots which are peeled off from the strips 36 of magnetic ink.

When such a printing device according to the invention is arranged for three primary colors, then a magnetic color print can be obtained. In that case become three different colors with appropriate toners of the three basic colors used and control pulses corresponding to the three basic colors of the three stages of color printing fed. With the invention, in embodiments as shown in Figures 1, 2A and 2B

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2 0 9 6 ? 9 I G 0 2 0

are, line drawings, with all other methods flat representations are produced.

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Claims (1)

PATENT CLAIMS M- Λ printing device for printing a magnetic pattern on a printing paper using magnetic ink, characterized by an ink holding device (1) 7, ¹³ · * ^l 3 » ¹ T * 25) made of non-magnetic material for holding the magnetic ink (2) with a desired printing distance from one side of the printing paper (5, 22), a magnetic device (3, 21, 3I) on the opposite side of the printing paper (5 * 22) for generating at least one magnetic field to attract the magnetic paint (2) to the Surface of the printing paper, first control means (4, 4a, 4o, 41) for supplying a control magnetic field either to the magnetic ink (2) or the magnetic device (3, 21, 31) when the desired opposition to the printing paper and second control means to change the relative position between the printing paper (5, 22) and the group formed from the color holder (1, 7, 11, 13, 17, 25) and magnetic device (3, 21, 3I) according to a predetermined pattern. 2. Apparatus according to claim 1, characterized in that the pattern is a line pattern. - 14 209829/0626 J. Device according to claim 1, characterized in that that the pattern is a raster scan pattern. 4. Device according to one of claims 1 to 3, characterized in that the ParbhaItmittel at least is a needle-shaped tube (1) with magnetic paint (2) stored in the tube interior. 5. Apparatus according to claim 3, characterized in that that the paint holder is a drum (7) with cavities (12) which are perpendicular to the direction of movement of the printing paper (5, 22) extending lines are arranged. 6. Apparatus according to claim 3> characterized in that that the paint holder is a sponge block (10) arranged in a row on its underside Has holes perpendicular to the direction of movement of the printing paper (5, 22). 7. Apparatus according to claim 3, characterized in that the paint holder is a thin belt (17), the magnetic paint (2) adheres to its lower edge (24). 209829/0626 - 15 - 8. Apparatus according to claim 3 * characterized in that that the paint holder is a thin belt (25) on the surface of which strips (36) of magnetic paint cling. 9. Apparatus according to claim 3, characterized in that that the paint holder is a thin sieve belt (25). 10. Device according to one of claims 1 to 3, characterized in that the first control means are a winding (4) around the magnetic device (3). 11. The device according to claim 4, characterized in that the first control means at least one Contain winding (4, 4a), which is arranged around a tube (1), while the magnetic device is a permanent magnet (3) is. 12. Device according to one of claims 7 to 9, characterized in that the magnetic device at least a magnetic rod (21) on a driven belt (20) and the first control means a first control winding (4o) have around the magnetic rod (21) - 16 209829/0626 wraps and is provided on the driven belt, and a second control winding (4-1) which is magnetically coupled to the first control winding (4o) and for Transmission of pulses is designed to generate the control magnetic field. 209829/0626 Le e rs e 11 e