DE1815433A1 - Method for line-by-line recording of information - Google Patents

Description

The priority of filing in Great Britain No. 57 878/67 of December 20, 1967 is used.

The invention relates to a method for line-by-line recording of information signals arriving in series, preferably telegraph signals, in a mosaic grid by means of an electrographic Printing unit, which extends over the entire width of the continuously moving recording medium A plurality of single writing heads includes over which the characters in a plurality of in the line direction running grid point rows divided, in the vertical direction recorded one after the other.

The previously known recording method according to the aforementioned principle essentially assume that the Write heads subdivided into groups each have a mosaic image memory is assigned, from which the characters are queried and recorded in rows at the same time.

This principle allows a very fast recording of the pending information, but points on the other hand the disadvantage that such printing units are very expensive due to the large number of mosaic image stores.

ZEW / P GrPf (II) vHy-krä.

December 12, 1968 - 2 -

909833/1217

Since in many cases the maximum recording speed the printing units working according to the aforementioned method are not used at all or their use due to the high acquisition costs is economical only in relatively few special cases, a process was found which was included in the Use a work speed that is sufficiently high for many cases with a significant reduction in the necessary technical Effort permitted.

This object is achieved by the method according to the invention solved that the belonging to a line, coded information signals in a known manner in a Memory is provided that the individual code combinations are stored one after the other as a result of their storage retrieved from this memory in repetitive cycles and converted into corresponding mosaic font and that within the individual evaluation cycles only one row of mosaic points for all characters is used for evaluation the write heads assigned to the character in question are brought.

The method is illustrated using an exemplary embodiment the invention in connection with the block diagram presented in the drawing Darge explained in more detail below.

The telegraphic characters arriving in series via the receiving line L first get to a series-parallel converter, which e.g. consists of a shift register, that is able to save every received code combination.

As soon as the respective character in converter A is completely available stands, this is communicated to the control unit G via the line al. At the same time, the relevant character combination via a parallel output LA to a multi-character memory B.

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According to the present example, this multi-character memory B comprises one hundred 5-bit memories, which receive parallel reception are set up and the character combinations offered by converter A. take over one after the other, with only one memory in each case from the control unit 0 via control lines g1 is prepared for takeover.

In this way, the successive character combinations taken one after the other into the memory levels of the multi-character memory B until all belonging to one line Combinations are available.

The end of a line is indicated on the transmission side by a special 'end of line ^1' character. This causes the converter A via the line a2. Emits a pulse to the control unit 0, which due to this control causes the human character memory B to transfer its information content en bloc to a buffer memory C via parallel outputs LB. At the same time as the transmission, the stages of storage B are returned to their initial state and are thus ready for storage of the next cell. The storage stages of the buffer C can be designed like those of the memory B, the only difference being that their contents are not automatically deleted during the reading process.

While the memory B is being refilled one after the other in the course of receiving the next line, there is sufficient Time the information contained in the buffer memory C in one of the arrangement of the write heads of the printing mechanism how to prepare.

Starting from the position provided by the design of the print heads A corresponding conversion is required for a point-by-point mosaic recording in ten horizontal rows, for example of the characters contained in memory C. It can be assumed here that only a single series of Print heads is provided. That implies that the signs

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one row divided into successive horizontal rows must be, which one after the other taking into account the recording medium moving perpendicular to the recording line are fed to the print head row.

For this reason, each line of characters contained in the buffer memory C is to be converted into a form such that it is available as a ten-row mosaic display, which can be queried row by row.

The conversion processes required for this are carried out in the Blocks D and E made. The two blocks D and E together form a telegraphy-iri mosaic code converter and are designed to convert one character at a time.

If the contents of the memory B in the manner described in the buffer memory C has been transferred, the control unit waits G to a trigger pulse JT from a clock device, not shown, which is preferably magnetic Recording medium is synchronized. When this pulse JT occurs, the individual stages of the block become C from the unit G via the lines gj5 one after the other controlled. This has the effect that character by character in serial form via corresponding output lines LC in get the character converter D (1 out of 96).

This process is repeated ten times for each stored line of characters, with the start of each line transmission 'through a pulse JT is triggered by the aforementioned clock device. The effect is that of the mosaic maker E (1 of 96) is transmitted one after the other in the order of storage character by character, this being repeated ten times repeated.

The characters called up one after the other in the aforementioned manner from the buffer memory C and recoded in the converter D are v / earthed separate lines LD in serial form to the mosaic builder r E

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out, which generates a series of output pulses that form the grid of points of the first row of the character to be reproduced in mosaic form, during the subsequent evaluation process causes the formation of the second row of points, etc., until the print line, which is composed of ten rows, is complete is recorded, with the mosaic row to be recorded by a corresponding control via the line g4 is determined by the control unit G.

The character and row-wise output impulses of the mosaic maker E arrive one after the other via lines LE to the hundred Recording arrangement divided into groups of seven recording heads each F. As a result of control via separate lines g5 from the unit G, only the write head group prepared for recording for which the following pulse series is intended. The sequence of the group-wise, serial Print head control is so fast that practically table no vertical offset occurs within the respective row when the recording medium is moved continuously. Of the vertical distance between the individual rows is determined by the pulse JT originating from the aforementioned clock device and by the speed of movement of the recording medium certainly.

With the tenth reading of the characters in a line from the A print line is completely recorded in buffer memory C. The content of the memory C is thus cleared by a reset pulse from the control unit G and the memory C is thus ready to accept the next line of information.

2 claims

1 sheet drawing. (l fig.)

909833/1217

Claims (2)

Claims 1. Method for line-by-line recording of incoming serials Information signals, preferably telegraph signals, in the mosaic grid by means of an electrographic printing unit, which is a plurality of single writing heads extending over the entire width of the continuously moving recording medium comprises, over which the characters in a plurality of rows of raster points running in the line direction divided, recorded one after the other in the vertical direction, characterized in that that the coded information signals belonging to a line are stored in a memory in a manner known per se be kept available that the individual code combinations as a result of their feeding one after the other repeated cycles are retrieved from this memory and converted into corresponding mosaic font and that within the individual evaluation cycles only one for brought all characters of the same mosaic point row for evaluation via the write heads assigned to the character in question will. 2. The method according to claim 1, characterized in that the individual scanning cycles are rejected Clock pulses are initiated, the time sequence of which depends on the transport speed of the recording medium depends. ZEW / P GrPf (II) vHy-krä.
December 12, 1968 909833/1217