CS243386B1 - Printing head for spot printing - Google Patents

Abstract

It concerns and concerns the printhead for dot print alphabet * numeric and other characters. netting refers to computer technology. Beie Arrangement of Print Elements in Printable heads *, improve print quality. Increase service life Printheads and Ribbons power source and weight loss printer. Print elements are in print heads * arranged at least into a series that makes a sharp angle to the line of printed characters preferably at 45 °. Whipping can be used in computing input and output printing techniques data transfer, data transfer, data acquisition and elsewhere

Description

(54) Dot print head

Refers to ae probléau dot print head alphabet * numeric and other characters.

netání refers to computer technology.

By arranging printing elements in the printhead *, improving print quality. increasing the life of the print head and ribbon, turning on the power source and reducing the weight of the printer.

The printing elements are arranged in the printing head * at least in one row which forms an acute angle with the row of printed characters, preferably at 45 [deg.].

Whipping can be used in computer technology for printing input and output data, data transmission, data acquisition and elsewhere.

243386 2

The present invention relates to the problem of a printhead for spot printing alphabetic and other characters. It is the arrangement of printing elements in the print head with respect to the printed line of characters, improving print quality, changing the power source, and reducing the weight of the dot printer *

Original dot printers printed characters mostly in a matrix of 7x5 dots. Gradually, the matrix increased to 9 x 7, 9x13, 11 x 9, but also more points. However, even when the matrix is enlarged, it is apparent from the characters that they are drawn from points, the lines are not continuous or continuous and thus the characters are poorly readable.

Increasing the character matrix also carries negative phenomena. Increasing the number of printing elements, such as printing wires, increases the weight of the print head, increases the excitation current, the printing electromagnets, and thereby increases the power sources and the weight of the entire printer. When the character matrix is enlarged, the print speed is reduced.

The prior art arrangement of the printing elements in a single column perpendicular to the direction of movement of the printing head has the disadvantage that the imprinted dots have a small diameter, the printed lines are not continuous and the three characters are poorly readable.

In addition, for most characters of the large alphabet, the entire wires of the printing wire electromagnets must be energized when printing. To do this, there must be a sufficiently large power source, which has an adverse effect on the weight of the dot printer.

The improvement of the quality of the dot-printed characters is achieved by arranging the printing elements in two columns mutually offset by a fraction of the dot pitch, as disclosed in the Czechoslovak patent no. 146 107 - Printing device for printing alphabetic and other characters in a dot-like manner.

However, a printing head having an arrangement of printing elements in two or more columns is more labor intensive.

Seven disadvantages of the prior art are eliminated by the dot-head printing head of alphanumeric and other characters, consisting of printing elements, for example electromagnetically controlled printing wires according to the invention, which consists in that the printing elements are arranged in at least one row forming an acute angle with the line of printed characters preferably 45 °.

The advantages of dot printing when using a printing head with electromagnet-controlled printing wires according to the invention are as follows:

the diameter of the printing wire can be increased up to 1.4 times, whereby the area imprinted with the wire has been increased up to twice that of the current state;

increasing the diameter of the imprinted points improves the continuity and saturation of the lines and thereby improves the legibility of the characters;

the manufacturing head of the printing head is reduced by the fact that the holes for the printing wires are larger, while the arrangement of the printing wires in one row is maintained;

increasing the diameter of the printing wires will facilitate their manufacture and increase their service life;

with a larger diameter of the printing wires, the life of the ink ribbon will be increased, since its binding is less disturbed;

- according to the new method, some elements are always in the space between the characters to be printed, thus reducing the weight of the printer. In addition, the current source is loaded more evenly;

- in the horizontal direction, fewer dots are printed on the characters than with the current printing method, thereby increasing the life of the print head and the print ribbon;

- the matrix dimensions of the printed characters can also be used for the same sized matrix of characters displayed on the display screen.

The imprinting of the points is then possible after a fraction of the point pitch.

The accompanying drawings show one possible solution according to the invention.

FIG. 1 schematically illustrates an arrangement of printing elements in a printing head with respect to its direction of movement. 2 and 3 show examples of possible alphanumeric printing in a new way. Figure 4 compares the present printing with the printing according to the invention.

FIG. 1 schematically depicts a printing head (not shown) with nine printing elements χ to δ in the basic position, the first to third array of characters A. fi, fi, the first position of further displaced printing elements 11 to 91 and the second position of further displaced printing elements 12 to fi2.

the width of the character matrix was selected to 13, which corresponds to the 13 steps of moving the print head. The mutual horizontal distance of the printing elements is constant, equal in this case to two steps. Thus, determining the position of the printhead is sufficient for only one print element at a time.

The first printing element χ in the home position is at the first step position of the second array of character B, the second and third printing elements fi and fi in the home position are between the first and second fields of the characters A and 3; first field fi.

After moving the print head 13 steps to the right to the first position of the shifted elements, so that the first element χ is now the eleventh element 11 at the position of the last step of the second array of character fi, further the fix elements IX to IX are in the second array of character fi. further printing elements fix and 91 are between the first and second array of characters A and.

After moving the printing head to the second position of the shifted printing elements, the last printing element 22 is at the last step position of the second array of character fi, the second printing elements 72 and fifi are between the second array of characters fi and the third array of characters fi and further printing elements 12 to 62 in the third field of the fi character.

By the above displacement of the print head, all of the print elements have passed over the second field of the character g and were thus able to print any character. It can be seen from FIG. 1 that two printing elements are always between the first and second array of symbols A and fi or the second and third array of symbols, fi and fi are thus at rest.

The space between adjacent printed characters is equal to one dot pitch. In Fig. 1, three points 1-01 are shown. 102. 103. of which point 101 belongs to the first field of character A; point 102 to the space and point 103 to the third field of character fi.

By always having two of the printing elements in the space between the character fields, only 7 printing electromagnets are always energized. Therefore, the power supply of the printing electromagnets can be reduced from 100% to 77%. With this, the weight of the overall printer decreases accordingly.

If the number of steps of the matrix 17 and the spacing between the characters of 1.5 point spacing are selected, then there are three printing elements between the first and second fields of the symbol A> fi. This means that only a maximum of 6 of the 9 printing electromagnets are energized and the power source is reduced from 100 * to 66%.

The choice of the 9 x> 7 matrix as opposed to the currently used 9x13 matrix allows for the improvement of the shape of A> M, fi, arc-shaped characters, improves the resolution of the zero digit from the letter fi, and in particular

Fig. 2 shows the capital letter A in the 9x17 matrix in a new way.

In FIG. 3, the figure 6 and the flame feature 6 are also drawn in the 9 x 17 matrix in a new way.

FIG. 4 illustrates the current method of printing a number 6 in a 9 x 13 matrix in the upper portion when the first nine printing elements χ to β are arranged in a column perpendicular to and direction of movement of the print head.

In the lower part of FIG. 4, on the other hand, a new method of printing the number 2 with further printing elements 11, 90, in the same large matrix. In addition to the saturation of points, smaller spacing between points, better line flow and better readability of characters, the new print method also has a smaller number of dots printed in the horizontal direction.

While the current method prints 7 dots, the new print method only 5 dots.

Thus, the time to print a character in a new way will be reduced compared to the current method of printing, thus increasing the print speed, but this also depends on the shape of the characters. In addition, the life of the printing head of the ribbon is increased and the heating of the printing electromagnets is reduced.

Adding elements above and below the base matrix allows you to print accented characters, lowercase letters j, p, q, y, and Cyrillic characters ·

The new arrangement of printing elements can be combined with the present method. By automatically rotating the print head, it is possible to print characters that are ~ 40% higher at the same time.

When the print head is rotated back to its home position, characters are printed in a new way, of normal size, but more readable.

The new arrangement of the printing elements in the printing head can be used for different sized character matrices and different printing elements, for example thermal and other.

The printing head according to the invention is used in dot printers used in automatic computers, in mini-computers, in terminals and elsewhere.

Claims (1)

SUBJECT OF YXNALE2U A printing head for dot printing of alphanumeric characters, comprising printing elements, for example printing wires actuated by electromagnets, characterized in that the printing elements are arranged in at least one row which forms an acute angle with the line of printed characters, for example 45 °.