DE7640303U1 - Writing mechanism for non-mechanical recording - Google Patents

Description

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TRIUMPH WORKS

Aktiengesellschaft Further Strasse 212, 8500 Nuremberg

EP / Ru / Dz / 2008 January 25, 1978 Writing mechanism for non-mechanical recording

The innovation concerns a writing work for the non-mechanical «^ Recording with an ink carrier with pigment particles embedded in an insulating binder, e.g. B. graphite particles, as described, for example, in German patent specification DT-PS 23 39 852.

In the known writing mechanism, a writing head is used in which preferably wire-shaped electrodes with a Counter-electrode acting grid with a color carrier, loading

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are embedded in an insulating binder, cooperates.

It has now been shown that when using such a writing unit in a structural unit, the dimensions and structure corresponds at least to a certain extent to a conventional typewriter, the use of a counterelectede, z. B. as a grid electrode, insofar as difficulties arise as to achieve a typewriter-like writing process, d. that is, in particular a typewriter-like ink carrier arrangement, preferably in tape form, this grid-shaped Counter electrode in the form of a wear-resistant endless belt, e.g. B. must be made of stainless steel, the once a regular cleaning is required

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makes, but also expensive and difficult to manufacture is.

It has now been recognized that these difficulties can be overcome this makes it possible that on the difficult to control lattice-shaped Counter electrode is dispensed with and instead, according to the innovation, each electrode in the electrode head

a second counter-electrode at a distance from this at constant potential - preferably at ground potential - is arranged in such a way that the voltage that can be applied to the controllable electrodes causes flashovers between the pigment particles located between each first controllable electrode and the associated second electrode that is at constant potential cause their transfer to the recording medium. Through this development according to the innovation of the writing mechanism, the grid electrode in the form of a conductive z. B. metallic grid or the like between the recording medium and ink carrier as difficult to control mechanical component can be dispensed with, which results in the additional advantage that an intimate contact can be established between the ink carrier and recording medium by the writing or electrode head for example:
will.

for example pressed with a force of about 3 kp / cm

Further features and advantages of the innovation are described below with reference to the drawings. Show it

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Figure 1 schematically shows the arrangement of a writing unit according to the innovation compared to the Recording media;

Figure 2 in section or in plan view of a controlled Electrode in the electrode or writing head with an associated "counter electrode" and its arrangement in relation to the ink carrier and recording media, and

Figure 3 controlled in section or in plan view * Electrode with counter electrodes combined to form a conductive metal strip.

In the arrangement of a writing unit according to the innovation shown schematically in FIG. 1, a recording medium 6 rests against a paper roller 14, for example of a conventional typewriter. In front of the recording medium 6 there is a Farbtrdgvf 3, to which an electrode or writing head VZ can be applied if a print is to be made by appropriate control of the electrodes 2, 13 of the writing head 12.

According to the figure, the electrode or write head 12 has next to each controllable electrode 2 at a distance of for example about 0.2 mm each one assigned "counter electrode" 13, which are preferably kept at constant or ground potential will. Between the electrode and Writing head 12 and the recording medium 6, a color carrier 3 is arranged, the pigment or color particles 5 in contains embedded in an insulating binder, so to a certain extent forms a "contaminated" insulator, wherein the mechanical and electrical. Properties of this dielectric, in particular its breakdown voltage by appropriate "doping" with "contaminating"

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Foreign particles, ζ. Β. Graphite particles, can be adjusted.

Another advantageous further development of the writing mechanism according to the innovation is achieved in that, accordingly FIG. 3, the associated electrodes 13 are combined in such a way that they have the shape of a metal strip, for example 13 form, which by means of an insulating plate 16 from the ancvauerbaren Electrodes 2 is isolated.

7640303 04/27/78

Claims (4)

TRIUMPH WERKE NÜRNBERG Aktiengesellschaft Further Straße 212, 8500 Nuremberg EP / Ru / Dz / 2008 January 25, 1978 Schotz claims 1. Writing mechanism for non-mechanical recording with an ink carrier with inlaid in an insulating binder Pigment particles, e.g. B. graphite particles, thereby characterized in that in the electrode head (12) of each electrode (2) a second, arranged at a distance from this Counter electrode (13) is assigned, between the electrode or write head (12) and a recording medium (6) the ink carrier (3) is arranged. 2. Writing unit according to claim 1, characterized in that that between each electrode (2) and its associated electrode (13) in the electrode head (12) there is a gap of about 0.2 mm. 3. Writing unit according to claims 1 and 2, characterized in that that between the electrode tips (2, 13) and the color substance (5) the electrode head (12) with Electrodes (2) and associated electrodes (13) with a 2
Force of about 3 kp / cm is pressed against the recording medium (6). 7640303 04/27/78 4. Writing unit according to Claims 1 to 3, characterized in that the electrodes (13) τ \) are combined into a conductive metal strip forming an "electrode" column (13). 7640303 04/27/78