SU1732363A2 - Printer - Google Patents

Abstract

The invention relates to computing, in particular, to devices for printing characters using a continuously rotating sign drum, and is an improvement of the printing device according to the author. Ev, No. 860103. The aim of the invention is to expand the field of application of the device by increasing the amount of printed information and increasing the printing speed. The goal is achieved by performing in the known device a sign drum in the form of a set of casting wheels with a width equal to the sum of the printing letters and line spacing, on each wheel 3 there are k rows of different font sets, where k, 2 are the horizontal axes of the letters of each font set in the same plane, perpendicular to the axis of rotation of the drum 1, the adjacent font sets of each wheel are placed with the depth of the overlap area A Sh, where S is the overlap factor equal to 0 Ј 4S 1, ah is the printing height l terres, with the impact hammers arranged so that the distance between their centers along the feed direction of the information carrier C ai + 32/2, where ai and aa are the width of the letters of the adjacent font sets corresponding to these impact hammers, and the distance along the axis of the wheel set equal to the depth of the overlap zone of the respective font sets. 4 il. with s

Description

The invention relates to computing, in particular, to devices for printing characters using a continuously rotating sign drum, and is an improvement of the printing device according to the author. St. No. 860103.

The purpose of the invention is to expand the field of application of the device by increasing the amount of printed information and increasing the printing speed.

FIG. 1 shows the structure of the proposed printing device: on

FIG. 2 and 3 show an example of the implementation of printing letters on a casting wheel; in fig. 4 shows an exemplary embodiment of impact hammers corresponding to a single bearing wheel.

The printing device contains a sign drum 1 with rings 2 located on its two sides, made in the form of a set of literal wheels 3 with print characters 4, mounted on shaft 5 and kinematically connected with electric motor 6, painting node 7 connected with bar VI

CJ

iho

jCJ

about

Gj

Yu

a ban 1, a block 8 of impact hammers disposed against the drum 1 and connected to a drive (not shown), a synchronization block 9 consisting of an opaque synchro disc 10 with a slit mounted on one shaft 5 with a drum 1, and a synchro sensor 11, optically coupled to the synchro disc 10, a tape-driving mechanism, including an electromagnet 12, a pinch rollers 13 connected to the rings 2 of the drum 1, and a control lever 14, made U-shaped with a protrusion in its middle part associated with the electromagnet 12, while the rollers 13 are installed on the free ends of the lever 14, and a print control unit 15, the input of which psd.klku: en to the output of the synchronization unit 9, the output electrically connected to the electromagnet 12, consisting of the control unit 16 and the series-connected drawing pulse shaping 17 and amplifiers 18, the output of block 18 is the output of the entire block 15, and its second input is connected to the output of block 16, the first input of which is connected to the second output of block 17, the input of which is the input of the entire print control unit 15, and between the drum 1 and the rollers 13the information carrier 19 is located, the width of the literating wheels 3 is equal to the sum of the height of the printing letters 4 placed on the wheel 3, and the line spacing, each wheel 3 has several (greater than or equal to two) rows of different sets of 20 fonts (FIG. 2 and 3), for example, fonts for printing textual and graphic or other special information, so that the horizontal axes of the printing letters 4 of each set of 20 fonts lie in one plane, perpendicular to the axis of rotation of drum 1, and the number of impact hammers 8 in the shock hammer unit, corresponding to each literary wheel 3, equal to the number of sets of 20 fonts on this wheel 3, while adjacent sets of 20 fonts on each wheel 3 can be made with partial overlap (Fig. 3 a, b), forming an overlap zone 21 in which there are ale The letters of letter 4, common to these two adjacent sets of 20 fonts, the impact hammers 8 corresponding to each wheel 3, in this case are made (Fig. 4) so that the distance between the centers C of the hammers 8 along the feed direction (OX) of the carrier 19

information equals

31 +32

where ai and 32 are literal widths of 4 corresponding sets of 20 fonts, and the distance along the axis (OY) of sign drum 1 is equal to the depth of Azona

21 overlap of the corresponding font sets 20, and L S-h, where S is the overlap factor, is within O Ј S 1; h - letter height 4.

The printing device operates as follows.

The sign drum 1 consisting of the wheel carrying wheels 3 and mounted on the same shaft 5 with it a synchrodisc 10 rotates 0s at a constant speed under the action of the electric motor 6. As the drum 1 rotates with the synchrodisc 10, the synchro sensor 11 generates a signal when a slot passes through it in the synchrodisk 10, signal

5 enters the print control unit 15. In this block 15, a rectangular stretch pulse is formed, the duration of which is determined by the time of illumination of the syncrometer 11 through the slot in the synchrodisc 10.

0 Formed in block 17 and amplified in block 18, the impulse of drawing enters the coil of electromagnet 12 by command from block 16. The excited electromagnet 12 attracts lever 14 and causes pressure

5 rollers 13 to the information carrier 19 and the rings 2 of the drum 1. Upon completion of the transport of the information carrier 19, the lever 14 with the rollers 13 is returned to its original position by means of return springs 22. In

At intervals of time when the information carrier 19 does not pass, the impact hammers 8, under the action of the actuator, press the information carrier 19 to the letters 4 placed on the wheels 3 by 5. At the same time, an impression of the corresponding element from the sets of 20 fonts is obtained on the information carrier 19.

When printing is completed, the impact hammers 8 return to their original position.

0 Since the horizontal axes of the letters 4 are perpendicular to the axis of rotation of the bar 1, then for one revolution of the drum 1 the device prints one position in all the terms of the document information displayed on the carrier 19.

5 Such a method of outputting a document to the information carrier 19 makes it possible to reduce the time it takes for the information carrier 19, since it extends by an amount equal to the sum of the width of the letter 4 and the letter to letter length.

0 distance, which is less than the distance of the known device, equal to the sum of the height of the letter 4 and the line spacing. Since on each wheel 3 of the proposed device several rows (more or equal to two) of different sets of 20 fonts are placed, this device can print various types of documents corresponding to the volume of characters contained in different sets of 20 fonts installed on each wheel 3 The number of drums

Hammers 8 corresponding to each wheel 3 are equal to the number of sets of 20 fonts placed on this wheel 3, which allows printing the information corresponding to each set of 20 fonts, both separately and simultaneously, and to print the required element from the set of 20 fonts the impact hammer 8 corresponding to this set of 20; therefore, symbols from adjacent sets 20 of fonts of each wheel 3 can be printed during one revolution of drum 1. The positive effect of using a printing device is to Licheng printing speed extension of the class of the printed information. Suppose that on each literature-carrying wheel of the proposed device there are k different sets (k 2) of fonts - an increase in the class (volume) of the printed information. Let these sets have the same width of the printing letters a and the same height of the letters b, with b a. Let each font set consist of a letter. In order to print all symbols of all font sets on a known device, it is necessary that all the letters of all these font sets be located on the same literal wheel of a known device. Then the diameter of the casting wheel is determined by the formulas

n b- (k-n + 2) n a- (n + 1) Oil Un -

where DM, Dn are the diameters of the wheels of the known and proposed devices, respectively. Let k 2. To obtain a high-quality print in devices using the principle of printing on a tape, we know the limiting value of the linear speed of printing letters in the print area Vnp 3 m / s, with an increase in which print quality is considered unsatisfactory. Linear speed can be expressed through angular. Then

aftp

,P

and | th prD7T

where ft) np, Wnp are the maximum possible values of the angular velocity of rotation of the sign baraoan of the known and proposed devices, respectively. Then

 a (n + 1) id Oi b (KP + 2)

The speed of the printing device is determined by the number of lines displayed per unit of time. For a known device, AI, where Oi is the speed of a known printing device; Ti is the time of one complete rotation of this device. The speed of the proposed device is determined by the formula

and Un rrTTn

where Tn is the time of one complete revolution of the sign drum of the proposed printing device;

I, m - the number of lines on the page and the number of positions in the line of the output document, respectively. Then

Um m

I

rrr

b-l (k; n + 2) a-m (n-f 1)

Bc

oflp l-ofip l-СЬ m-fttfp m-Dn ftflp

(one)

For documents with standard letter sizes, a ratio of -577 approximately

at-t is equal to 1. Hence, with k 2 (n 1) 2.

UM Pt 1

This shows that the print speed of the proposed device when expanding the class

printed information is increased approximately 2 times.

In addition, if the font sets are partially overlapped, then more different font sets can be installed on each type wheel. Suppose that another set (k 3) is additionally placed. Then by the formula (1)

Un I (3; P + 2) .o p

AI a-m (n-M) p + g

whence td, 9. So the speed of the device

Uh

in this case, it will increase by approximately 2.9 times as the class of printed information is expanded.

Claims (1)

The invention of the printing device for auth. St. Ms 860103, characterized in that, in order to expand the field of application of the device by increasing the amount of printed information and increasing the print speed, the sign drum is made in the form of a set of literal wheels, the width equal to the sum of the height of printing letters and interline spacing, on each casting wheel, there are rows of different sets of fonts, where k 2, the horizontal axes of typing letters of each set of fonts lie in the same plane, perpendicular to the axis of rotation of the casting wheels, and adjacent sets of fonts of each casting wheel are placed with the depth of the overlap zone А Sh, where S is the overlap factor equal to О S 1, ah is the height of the printing letter, and the shock mod the trays of the hammer unit, corresponding to each wheel bearing, the number of which corresponds to the number of sets of fonts on this wheel, are arranged so that the distance between their centers along the feed direction of the information carrier C is (ai + 32) / 2, where ai and 32 are the width of the letters of the adjacent sets of fonts corresponding to these impact hammers, and the distance along the axis of the set of the casting wheels is equal to the depth of the overlap zone of the corresponding sets of fonts. H n ; AB8PD: LJ jQfvo  i: I } FIG. five Xj i: m I } but Have