JPS6017332Y2 - ink ribbon mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ink ribbon mechanism that provides different pixel areas depending on the pixel density in an impact dot printer.

Conventional ink ribbons require constant conditions such as the amount of ink when printing in a single color;
It was designed to give a constant pixel area to various factors (printing pressure, temperature, etc.).

This point is the same for red and black ink ribbons, and the amount of ink applied is adjusted so as to give the same pixel area even if the colors are different.

For this reason, if the conventional ink ribbon is used in a kanji printer, and kanji are printed with 24 x 24 dots, and alphanumeric characters and kana characters are printed with 7 x 9 dots, as shown in Figure 1, Due to the large dots and pitch of the characters, there are relatively large blank spaces between the dots, which makes it difficult to recognize a series of dots as line segments.・There was a drawback that the apparent density was extremely different from that of kana characters, and the overall printing quality was low.

In order to eliminate the above-mentioned drawbacks, the present invention divides the ink ribbon into multiple stages along the longitudinal direction, and changes the amount, composition, and processing method of ink applied to each stage, as well as the amount of ink applied to each stage, as well as the fabric threads constituting each stage. By changing at least one element among the type, thread thickness, weaving density, processing method, etc., different pixel areas are given for each row under the same printing conditions.
A detailed explanation will be given below according to the drawings.

FIG. 2 is a diagram showing an embodiment of the present invention.

In the same figure, 1 is a platen, 2 is a sheet of paper, and 3 is an ink ribbon, and this ink ribbon 3 has a first half portion 3a which has a high ink content and is knitted with thick yarn as shown in FIG.
and a second half 3b having a reduced ink content and knitted with fine yarn.

4 is a cartridge that stores the ink ribbon 3, 5 is a wire dot head, 6 is a plate on which the cartridge is placed, 7 is a pivot shaft of the plate 6, and 8 is a plate 6.
A spring 9 biases the receiving plate 6 counterclockwise, and a magnet 10 rotates the receiving plate 6 clockwise against the biasing force of the spring 8. The magnet 10 is a stopper.

In the embodiment with the above configuration, when printing alphanumeric characters and Japanese characters, the magnet 9 is not driven and the plate 6 is locked to the stopper 10.

Therefore, the wire protruding from the wire dot head 5 strikes the platen 1 through the first half 3a of the ink ribbon 3 and the paper 2, thereby printing dots on the paper 2.

At this time, since the first half 3a has a large ink content and thick thread is used, the ink is diffused over a wide range on the paper surface during printing, and the wire protrudes and deforms the ribbon. As shown in Figure A, the pixel area of the printed dot is determined according to the printing method.

When printing Chinese characters, the magnet 9 is driven, and the receiver rotates the plate 6 clockwise against the biasing force of the spring 8.

As a result, the cartridge 4 is tilted downward to the right in FIG. 2, and the wire protruding from the wire dot head 5 strikes the platen 1 via the second half 3b of the ink ribbon 3 and the paper 2, thereby printing dots on the paper 2.

At this time, since the ink content in the second half 3b is small and thin thread is used, the ink diffusion on the paper surface during printing is narrow, and the protruding deformation surface of the ribbon due to the wire is small, as shown in Figure 4. As such, the pixel area of the printed dot is printed small.

Therefore, as shown in FIG. 5, kanji characters are printed finely with small dots, and alphanumeric characters and kana characters are printed coarsely with large dots.

In the above embodiment, it goes without saying that the wire dot head 5 is fed at low speed when printing Chinese characters, and fed at high speed when printing alphanumeric characters and kana characters.

Further, it is appropriate that the first half 3a of the ink ribbon 3 uses a weft thread of 50 to 70 deniers, the second half 3b uses a weft thread of 30 to 40 deniers, and the warp threads are both about 30 to 40 deniers. be.

Further, it is preferable that the boundary between the first half 3a and the second half 3b be separated by melting with ultrasonic waves or the like to prevent ink from moving beyond this boundary.

The present invention is not limited to the above-mentioned embodiments. For example, by changing only one element among the type of ink such as viscosity, diffusibility, and permeability, ink content, thread thickness, and weaving density, the first A section and a second section may be formed, the first section providing a small pixel area and the second section providing a large pixel area.

Further, two or more of each element of the ink ribbon may be combined to form a first
It may be divided into a category and a second category.

1. The elements of an ink ribbon can be broadly divided into ink and cloth, and the elements of this ink include the distribution of pigments, dyes, etc., the amount and type of solvent, the level of ink viscosity, the amount of application, etc. , Also, the cloth elements include the type of thread (for example, nylon, Tetron), and the thickness of the thread 30.40.50.6
0 or 70 denier), weaving density (amount of texture), processing method (e.g. plastic coating, ultrasonic processing, heat processing) to separate the first and second sections to prevent ink from flowing between them. ).

As explained in detail above, according to the present invention, different pixel areas are given for the same printing conditions, so even if the pixel densities are different, the apparent density will be the same, and a series of low pixel densities will be printed. Dot rows are easily recognized as line segments, and the overall printing quality is improved.

[Brief explanation of drawings]

Fig. 1 is a diagram showing a conventional printing example, Fig. 2 is a diagram showing an embodiment of the present invention, Fig. 3 is a diagram showing an example of an ink ribbon used in the present invention, and Fig. 4 A and the opening are dots. FIG. 5 is a diagram showing an example of printing according to the present invention.

Claims (1)

[Scope of utility model registration request] The ink ribbon is divided into multiple stages along its length, and the amount, composition, and processing method of the ink applied to each stage, as well as the type of thread of the fabric that makes up each stage, the thickness of the thread, the weaving density, By changing at least one element such as the processing method, it has an ink ribbon that gives different pixel areas for each row under the same printing conditions and a single wire dot head. An ink rib/mechanism characterized by a structure that selects a stage that gives a small print, and selects a stage that gives a print with a large pixel area in the case of alphanumeric, kana printing.