JPH0422149B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ink ribbon used in typewriters and printers having an impact type printing section. More specifically, the present invention relates to a multicolor ink ribbon formed by impregnating the left and right sides of a cloth base material with liquid inks of different colors across the border line.

[Prior Art and Problems to be Solved by the Invention] In this type of multicolor ink ribbon, unless some kind of barrier is provided between regions impregnated with inks of different colors, adjacent inks of different colors will not interact with each other. The disadvantage is that the colors mix during use. Therefore, the boundary between inks of different colors on the base material is melted (see, for example, Japanese Utility Model Application Publication No. 49-437644), or the boundary is impregnated with a resin insoluble in the ink and hardened (for example, as disclosed in Japanese Unexamined Utility Model Publication No. 49-437644). 57-125082), and water repellents such as silicone oil were also applied to the border (for example, JP-A-58-1999).
(Refer to Publication No. 140285) However, in both cases, there is a problem as follows.In other words, if the border is melted, the fibers at the melted point become film-like and become brittle and easily separate, which shortens the ribbon's service life. The problem is that it becomes shorter.

In addition, when impregnating and curing resin at the boundary, the resin soaks into the base material and spreads, resulting in areas where the ink cannot be impregnated over a wide range.
There is a problem in that the necessary width and length of the ribbon becomes extra large, and the feed structure of the ink ribbon and the shift mechanism for changing colors must be made extra large. Furthermore, applying a water repellent agent has the same problems as impregnating and curing a resin. One idea is to use an oil-based vehicle to prevent colors from mixing with each other without borderlines, but this would result in differences in osmotic pressure, such as when one ink is used much more than the other. Therefore, there is a problem that color mixture occurs.

[Means for Solving the Problems] In order to solve these problems, the present invention provides the following:
The present invention is characterized in that the border line is formed by using a thread having a property of repelling both of the inks in its longitudinal direction.

[Operation and Effects of the Invention] By doing this, both inks are repelled at the border and do not penetrate into the border line, so it is not possible to completely melt the base material at the border line as in the past. A thin and durable border line can be obtained without impregnating it with resin.

[Example] Next, the present invention will be specifically explained.

Synthetic fibers such as nylon 6, nylon 6, 6, or polyester, and natural fibers such as cotton or silk are usually used as the threads of the cloth base material, and in the present invention, the threads in the longitudinal direction of the borderline portion are (hereinafter referred to as border warp), the same materials, thickness, twist, etc. as before are used.

The border warp yarns to be woven into the fabric base material in the border line portion are impregnated with fluorine oil, silicone oil, etc. on the surface of the various yarns and have properties that repel ink used in this type of ribbon. Threads whose surface has been modified by coating and curing if necessary, and fluorine-containing polymer threads (for example, threads made of polyfluoroethylene, polyfluoroethylene propylene, polyfluoroethylene-hexafluoropropylene, etc.) Preferably, a thread made of a material that itself has the property of repelling the ink is used.

The thickness of the border warp yarns may be the same as that of other yarns of the base material, or may have a different thickness. For example, it may be made of thick thread such as tegus. The number of border warp threads can be adjusted appropriately depending on the difference in thickness between the border warp threads and other threads, the number of threads to be threaded, the allowable width of the border line, etc., but it is generally around 3 to 6 threads. It is true.

Any conventional ink may be used in the present invention, and either a hydrophilic or lipophilic vehicle may be used. For example, hydrophilic ink is made by mixing and dispersing pigments, dyes, fluorescent substances, magnetic powder, etc. of various colors in a vehicle whose main component is a linear polyether such as polypropylene glycol or polyethylene glycol, or a compound obtained by addition polymerization of these. Or, lipophilic ink, which has non-drying oil (including synthetic oil, mineral oil, animal and vegetable oil, etc.) as the main component of the vehicle and mixed and dispersed pigments, dyes, phosphors, or magnetic powder of various colors, etc., is appropriately used. can.

Then, lipophilic inks may exist, hydrophilic inks may exist, or lipophilic inks and hydrophilic inks may exist with the border line in between.

In short, by using border warp yarns that repel ink, it is now possible to form a thin border line and to reliably prevent adjacent inks from mixing with each other.

Claims (1)

[Claims] 1. In a multi-color ink ribbon formed by impregnating liquid inks of different colors on the left and right sides of a cloth base material with a border line in between, the border line includes threads having the property of repelling both inks in the longitudinal direction thereof. A multicolor ink ribbon formed by using