JPS5829693A - Manufacture of ink ribbon - Google Patents

Abstract

PURPOSE:To raise the quality of printing by equalizing the density of an ink ribbon as well as making its thicknes thinner by a method in which a raw cloth is heat-cut, coated with an ink, and then rolled by a roll whose surface is provided with large numbers of embossed portions. CONSTITUTION:A raw cloth 11 is cut into a ribbon width and then rolled in a rolling process 13 to equalize the textures of warp and filling yarns. Then, the cloth so treated is coated with an ink and subjected to an aging process. The roll used in the rolling process 13 has a surface having large numbers of embossed portions with striped pattern (a), crossed pattern (b), a parallel pattern (c), a partly embossed pattern (d), etc., in which the preferred distances between the projected portions are 0.1-0.2mm. in pitches. The rolling process 13 may be performed after the ink coating process.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing ink ribbons used in printers, typewriters, and the like.

Conventionally, the production of ink ribbons involves a heat cutting process 2 in which a raw fabric 1 is cut into ribbon widths as shown in FIG.
, coating process step 3 to further coat ink, aging step 4 to perform aging, spooling process (in case of 7 pool ribbon) process 5 to perform spooling.
, and packaging step 6.

By the way, the ribbon for typewriters, which is especially widely used, has a length of 11 m with a width of 13. In this manufacturing method, the raw fabric is mainly heat-cut into 10:) 35 to 55 inch wide pieces. However, although it varies depending on the loom, the density in the width direction of the original fabric 10 is lower and rougher in the center than at both ends. Current weaving methods cannot prevent this coarseness and density. For this reason, when used in the conventional ink ribbon (wire dot printer), ricks, or ink dot printer (11), there is a difference in print density between the wires facing the fibers and between the fibers, resulting in print quality. There was a drawback that it resulted in a decrease in In addition, regarding the lifespan of the original fabric 1, the lifespan of the coarse portions is extremely reduced compared to the dense portions.

The reason for this is the lifespan of the original fabric 1.

Dot running speed V, printing force peak value Fnn, contact time τ. Expressed as: L"V"Fr+, -2τ. -1.

This is because, as shown in the micrograph in Figure 2 (a) and the schematic diagram in Figure 2 (tbl), the weave of the original fabric 1 has a characteristic of having three warp yarns 7, and a gap 9 occurs. . This is because the structure of the threads in the gap 9 has a small number of overlapping warp threads T and weft threads 80, and the stress received during printing becomes locally high.

For these reasons, with regard to the deterioration of printing quality and the lifespan of the original fabric 1, there are special specifications, such as 7 or 80 warp threads or weft threads, to avoid increasing the density of the structure. However, as the number of ink ribbons increases, the material of the ink ribbon becomes thicker, the pixel diameter of the print increases, and the print quality deteriorates.

This invention was made to eliminate the above-mentioned drawbacks, and improves printing quality by making the density of the ink ribbon uniform and making the thickness of the original fabric thinner in an isometric manner. It is something. This invention will be explained in detail below.

FIG. 3 is a process diagram of a method for manufacturing an ink ribbon, which is an embodiment of the present invention. In this cycle pressure, 11 is the original fabric, 12 is the ribbon width heat cup (processing process, 13 is the p
14 is an ink coating process, 15 is an aging process, 16 is a spooling (in the case of spool winding) process, and 1T is a banking process. Each process will be explained in detail below. The original fabric 11 of the ink ribbon is often 35 to 55 inches wide, although it depends on the loom. Therefore, it is necessary to cut this raw fabric 11 into a specified ribbon width.

Normally, nylon fabric is often used due to its cost and longevity, so we will use nylon fabric as an example here. If you simply cut it, both ends of the cut part will come off.

To prevent this, a heat cut is performed in a heat cut treatment step 12. This is a commonly used method.

Next, the cut original fabric 11 & roll rolling process 13
2 (1) to eliminate 9 between p3i. The original fabric 11 that has been rolled is coated with ink in a normally performed ink coating process 14.

Next, even if coated with ink, the ink does not adhere to nylon σ], so it takes a certain amount of time for the oil-based ink to stably adhere to the area around the fibers through capillary action in the gaps between the fibers. Therefore, aging treatment step 15
Perform aging. Usually it is left for a week depending on the quality of the ink. Once the ink has stably adhered to the ribbon, it is wound onto a spool to a predetermined length in a spooling step 16.

Further, the wound ink ribbon is packaged in a packaging step 1T, and the manufacturing process is completed.

FIG. 4 shows an example of the surface condition of the roll used in the roll rolling process 13. Figure 4(a) shows the diagonal opening, Figure 4(b) shows the transition point,
FIG. 4(c) shows a parallel pattern, and FIG. 4(a) shows a partially convex shape.

Conventionally, as shown in FIG.
Since the ink coating treatment was performed directly on the original fabric 1 cut in 1, the fiber structure of the original fabric 1 remained in a woven state. As shown in FIG. 3, after heat cutting, a roll rolling process 13 is added to the rolling process, and as shown in the micrograph of FIG. 5, it is seen that the material is uniform with no gaps.

Note that the roll rolling process 13 is the heat cut process 1.
2, but even if it is performed after the ink coating step 14, it will have the same effect in terms of uniformizing the texture of the fabric, and according to this method, the processing time of the aging step 15 will be shortened due to the forced adhesion effect. In addition, the rolls used for rolling are
It is preferable that the pitch of the protrusions is 0.1 m to 0.2 m, and it is preferable that the protrusions are sharp and may damage the raw fabric 11. The material has the hardness required to move the weave of the raw fabric 11 and is good if it is insoluble in oil. It goes without saying that the surface shape of the roll may be as shown in FIG. 4 as long as it has convex portions to provide the effect.

Figure 6 (a), (+)) shows the conventional ink ribbon,
1 is a micrograph showing the pixel diameter when using the ink ribbon according to the present invention. As a result, it can be seen that the printed image quality is more improved in the case shown in FIG. 6(b) using the ink ribbon manufactured according to the present invention.

As explained above, this invention adds a rolling process that has many convex parts on the surface during the conventional process, so the structure of the warp and weft is uniform, and in terms of printing and lifespan, no wire dots can be found in any part. Since the contact is almost uniform, stress is reduced and life can be improved. Also,
Regarding print quality, since the tips of the wire dots come into uniform contact with the ribbon, the pixel diameter becomes clear. Furthermore, roller rolling has the advantage of being able to reduce the thickness of the original fabric compared to conventional manufacturing methods.

[Brief explanation of the drawing]

Figure 1 is a process diagram of the conventional ink ribbon manufacturing method;
Figures (a) and (b) are micrographs and schematic diagrams showing the structure of conventional raw fabric, Figure 3 is a manufacturing process diagram showing an embodiment of the present invention, and Figures 4 (a) to (d). ) are diagrams each showing an example of the surface condition of the roll, FIG. 5 is a microscopic photograph showing the structure of the original fabric according to an embodiment of the present invention, and FIG. 6(a)
, (b) is a micrograph showing a pixel system when using a conventional ink ribbon and an ink ribbon according to the present invention. In the figure, 11 is the original fabric, 12 is the heat cutting process,
13 is a p-roll rolling process, 14 is an ink coating process, 15 is an aging process, 16 is a spooling process, 1
T is the backing process. Figure 1 Figure 2 (a) Firefly b)

Claims (1)

[Claims] In a method for manufacturing an ink ribbon in which a raw fabric is heat-cut to a predetermined width, then coated with ink, and then aged to obtain a desired ink ribbon, a row cutter having a large number of convex portions on the surface is used, A method for producing an ink ribbon, which comprises rolling the original fabric after cutting or coating with ink.