DD206008A1 - ADJUSTABLE COLUMN GRID PRINTER AT CURVE PRESSURE HIGH PRINTING DENSITY BY RESTORE PRINTING - Google Patents

Abstract

THE TECHNICAL SOLUTION "ADJUSTABLE COLUMN GRID PRINTERS HAVING A CURVE PRESSURE HIGH DENSITY RESTORE" COVERS IN ALL AREAS OF INFORMATION TECHNOLOGY IN WHICH ALPHANUMERIC COLUMN GRID PRINTERS ARE USED FOR INFORMATION EDITION (ACTION TECHNOLOGY, REMOTE WRITING TECHNOLOGY). THE ADVANCED USE OF THE ALPHANUMERIC COLUMN GRID PRINTER ALSO FOR OPTICALLY SUFFICIENT QUASIGRAPHIC CURVE PRESSURE IS ACHIEVED BY SMALL CIRCUIT CHANNEL CHANGES AND WITHOUT GROWING THE PROGRAMMED CHARACTERISTIC. THE FUNCTION IS RESTRICTED BY RECEIVED CODE CHARACTERS AND BASED ON THE IMPROVEMENT OF THE PRINT LABEL DENSITY OF THE PRINT LINE BY SUPPRESSING THE PRINTING OF A RANGABLE NUMBER OF RASTER POINTS OF NORMAL ALPHANUMERIC CHARACTERS AND A SIMULTANEOUS REDUCTION OF LINE DISTANCE. A SELECTION OF THE SUBSEQUENT RESIDUAL SIGNS IS USED ASL CURVE PRINTING POINTS. Thus, a small increase in the usefulness of the printer is achieved with minimal effort.

Description

236955 5

Title of the invention

Reversible column raster printer on Eurvendruck high pressure mark density by residual mark pressure

Field of application of the invention

The proposed solution can be used by all users Ton conventional pressure devices on column screen printing base (3-lektronische data processing, microcomputer technology, telex writing), where there is a need ", in addition to represent device-specific provided alphanumeric text information and quasi-graphical curves.

236955 5

Characteristic of the known technical solutions

A common method of character reproduction by electronically controlled printing devices, as described in the patent Summer 106-487 (DDR), is to generate the print characters from predetermined alphabets by suitable control of print wires as a combination of halftone dots, which replicates the shape of the corresponding print character (matrix printing) *

In the case of column raster printers, analogously to Lummer No. 149,725 (GDR), the printing consists of a succession of printing nips with a defined number of printing dots per printing nip and a number of blank columns for character separation. The matrix or column raster printers have internally a permanently programmed character set (alphabets, standard and special character set). The printout of a character from this character set occurs after a defined print release (receipt of a code character, key press o, ä <). If one tries to display curves with the programmed characters on such printers, resulting from the fixed number of printed characters per pressure cell and pressure column, very confusing, large-scale representations with high paper consumption ».

Matrix printers intended for alphanumeric and graphic recordings are realized with an increased programmed-in character set (additional print characters for graphic printing), as can be seen in the GDR patents Hummer 88 414 and 123 557. If alphanumeric matrix printers are to be equipped for curve printing, this can be done according to patent

Script 134 682 (DDE) done by Umkqdierung the character supply, which entails a considerable interference with the function of the device, associated with the installation of large assemblies.

Object of the invention

The aim of the invention is to extend the field of application of simple alphanumeric printers without the special hardware applications described above such that

- reversible via char

- a visually appealing quasi graphical curves drucvk

- mit.herher high density and associated low paper consumption

can be realized * essence of the invention

The invention is based on the object, an alphanumeric column screen printer without enlarging the character stock and extensive Funktions- and ¹ . Circuit changes to switchable Eurvendruck. to modify. For a given column screen printer, the bridge consists of a sequence of 5 halftone dots at 7 halftone dots and a number of blank columns for character separation. The line spacing is also defined. In addition to this mode of operation, in the solution presented, the following is achieved:

1. A defined code character received by the printer causes a technical reversal of the printer via an evaluation circuit.

2. This reversal causes a suppression of any number of randomly allocable Easterpunktspalten or empty columns, both with respect to the column feed and the pressure needle control. When receiving! Code characters through the printer, the non-suppressed print columns are printed as Eest marks. "

Selected Eest signs are used as curve points. By appropriate control of the printer with selected code characters, for example: bar graphs as well as curves can be compiled from these curve points *

3. Zuir optical adjustment to the thus achieved higher Druckzeic.hendic.hte is made via the same reversal a reduction of the line feed.

4. The detection of another defined code character switches back to the original operating mode of the printer.

embodiment

The description refers to an electrical column screen printer, the printed character to 5 Easterpakttspalten a 7 pressure points with 3 spaces for 'character separation

records and processes the character set of the telegram alphabet CCITT IT ο 2. (j ¹ eras write code).

- When receiving a freely definable Perns ^ c.hrekkodezeichen from the fixed alphabet "(here code II / 4 from the telegraph alphabet No. 2) is in the Peinschreiber: a built Umsehaltebauelernent (flip-flop) set, which the state» switching to Xurvendruck Resetting this flip-flop with another code character (here code sign 32) means returning to alphanumeric printing,

- By setting the flip-flop is also a built-in evaluation circuit for the count of the column clock generator, which causes the horizontal movement of the printhead and the line feed is turned on. Depending on the count of this column clock generator, the stepping motor controller that generates the column feed, as well as the pressure pulse control, which realizes the columns printing columns in the ¹ evaluation circuit can be differently arranged, after 1, 2, 3, 4, 5, β or 7 turned on. This allows each print line (specified by the paper width):

69 printed characters per 8 printed columns (original version)

or 79 print residues each 7 printing columns

or 92 printed character residues per 6 printing columns

or 110 print residues per 5 printing columns

or '138 printed remainders 4 printing columns each

or: 184 printed-label residues per 3 printing columns ·

or 276 print marks left every 2 printing columns

or 552 printed-label residues per 1 printing column

to be recorded.

236 9 55 5

δ,

- By a slightly changed meter reading evaluation of the column clock generator, the number of drive pulses for the Yertikalschrittmotor is reduced to 4 and thus reduces the line spacing to half rope with set Umschalte flip-plop * The reduction of the line spacing causes an adjustment to the higher .Druckzeichendichte per line of printing and thus a visually appealing image for graphic printouts «

The solution described in the exemplary embodiment is shown in block diagram in FIG. 1. The printing of graphical representations with the presented technical solution is dependent on the code character drive of the column screen printer and described below using the example of the curve pressure and bar graph pressure:

- The expression "Curves" is made by controlling the pernicious symbol with selected code symbols »whose printed character residues appear as curve

'good' (z * B »code 11/26 TeIegraphenalphabet Hr. 2). The routine of horizontal placement of the curve point in question is carried out by driving the teletypewriter with a corresponding number of spaces, then by driving the code character that causes the Kurvenpunktabdruck and by driving with the combinations carriage return / line feed to printhead provision, When this routine repeats, at new Leerzei number of pulses, curve curves can be represented from individual curve points,

- When printing bar charts, the following routine can be realized;

236955 5

Triggering the telegraph with the number of curve print code characters corresponding to the horizontal placement of the size to be displayed; for printhead reset Control with the combinations carriage return / line feed «Repetition of this routine with new number of code characters to be printed,

Claims (1)

invention claim Reversible column screen printer on curve pressure high · pressure character density by residual character pressure, in which the code characters specified in an alphabet are received by an alphanumeric character printer and represented by the Spaltenrasterdrukkes, characterized in that on the one hand at Smpfang a fixed code character from the alphabet, a reversal of the device Curve printing takes place, are recorded in the received codes from "the existing standard alphabet by reducing the print columns to be printed each print characters and column fonts to be executed only as print characters remnants used for the curve print and thus; the print density per line is increased, at the same time to adapt to the horizontal character density of the line feed changes 'will' and on the other hand at Smpfang another codeword used in the alphabet an Eückschaltung from that with this Druckger t :: -seinem corresponding originating end use provided alphanumeric character printing is realized. For this purpose 1 sheet; Drawings.;