JPH0334882A - Ink ribbon - Google Patents

Abstract

PURPOSE:To prevent the generation of printing irregularity at a tab part by constituting an ink ribbon of a seamless ribbon formed by fusing a seamless tube in the diameter direction thereof and specifying the average thickness of the tab part of the ink ribbon. CONSTITUTION:An ink ribbon is composed of a seamless ribbon formed by fusing a seamless tube obtained according to a double weaving method in the diameter direction thereof. When the average thickness of a tab part is set to d2(mm) and that of a base part is set to dl(mm) at the time of use as the ink ribbon, beating/rubbing treatment is applied to the seamless ribbon so that the tab part satisfies the relation of d2-d1<=0.012. Since the thickness of the tab part is allowed to approach that of the base part in the ink ribbon by the beating/rubbing treatment, even when the use of the new ink ribbon is started or high speed printing is performed or the number of head pins increases, trouble such that the sharpness of printing is lowered when the tab part of the ink ribbon approaches a head is not generated at all. Since the seamless ribbon has no seam, the hooking with head pins is eliminated, durability is imparted and a ribbon cassette is made compact.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an ink ribbon for impact printing consisting of a seamless ribbon.

2. Description of the Related Art] Endless tape-like woven fabric impregnated with ink is widely used as monochrome or multicolor ink ribbons for wire-dry printers for computers, word processors, and other equipment.

In the impact printing method, a platen, paper, perforated mask, ink ribbon, and head are arranged in this order, and a dot printer needle protruding from the head is made to protrude toward the ink ribbon, and the ink ribbon is passed through the hole in the mask. Hit the paper, that #iv! is received by the platen.

The above-mentioned endless tape-shaped woven fabric is usually plain-woven using nylon multifilament yarn or polyester multifilament I thread for the warp and sewing threads, and the 1i woven fabric is woven into a tape shape with the warp direction being the length direction. It is produced by cutting and joining both ends to make an endless sheet, but since a step is created at the joint, the dot printer needle may get caught in this step, making the print unclear.

In order to prevent this, manufacturing technology must be advanced, but
Seamless tube-shaped weave using the bag weaving method! 11
A known method is to obtain a seamless tube (that is, a seamless tube), undergo steps such as scouring, etc., and then melt-cut the seamless tube in the radial direction to obtain a seamless ribbon. In this case, contrary to the case where an endless ribbon is obtained from the plain woven fabric, the weft direction of the woven fabric becomes the length direction of the seamless ribbon.

However, in this seamless tube, during bag weaving, both ends of the arranged warp yarns are pulled inward by the tension of spinning, so the density of the tissue at both ends (111 areas of about 3 to 4 mm each) is cannot avoid being higher than other parts. This means that the density of the edge portion of the seamless ribbon obtained by melt-cutting the seamless tube is higher than the density of the bottom portion.

Even if the density of the edge of the seamless ribbon is higher than the density of the base (m), it does not cause much problem when the printing speed is low or medium or when the number of head bins is relatively small, but when printing at high speed or, for example, 24 dots, As mentioned above, as the number of head bins increases, the sharpness of the print decreases only when the Fr section approaches the head, and this point is the only drawback of seamless ribbons. However, such l-rubble occurs when a new ink ribbon is first used, and as the ink ribbon is continued to be used, this trouble naturally disappears.

One way to solve the problem described in L is to replace part of the warp yarns at both ends during weaving with water-soluble yarns, and to dissolve and remove this water-soluble P yarn during scouring. Prevent the density from increasing at the ends of both ears! - Attempts are being made to (For example, regarding ink ribbon, Japanese Patent Application Laid-Open No. 59-29187, and regarding endless fabric, Japanese Patent Application Laid-Open No. 54-12077)
Regarding the rotary screen in Publication No. 4, Special Publication No. 512
(See Publication No. 0630) Another method is to take into account that the tension of the weft threads will pull the ends of both ends inward during weaving.
Attempts have also been made to reduce the number of warp yarns at both selvage ends (that is, to arrange the warp threads sparsely at both selvage ends) and perform weaving.

Problems to be Solved by the Invention However, a part of the hem thread corresponding to the selvage ends during weaving is replaced with water-soluble thread, and this water-soluble thread is dissolved and removed during scouring to form the edges of both selvedges. The method of preventing the increase in density requires an extremely complicated process.Since the process is to dissolve from the high-density part, undissolved parts tend to remain, and it is necessary to completely eliminate the undissolved parts. If strong melting conditions are used, there is a problem that the fabric itself becomes easily damaged.

Although it seems theoretically possible to perform weaving by arranging the warp threads at both ends less than those at other parts during weaving, the weft threads fed out from the shuttle will give less force to the ends of both ends. Since the tension differs slightly depending on the degree of consumption of the weft yarn before and after changing the casting pipe or in the shuttle, it is omnipotent to ensure that the density at both ends is constant even on a single loom, and even on a large number of looms. It is safe to say that if the target is a loom of 111, it is impossible.

In view of this situation, the present invention has been made to provide an ink ribbon that does not cause uneven printing at the edges of the seamless ribbon even when the dot printer needle of the head approaches the edges of the seamless ribbon. be.

Means for Solving the Problems The ink ribbon of the present invention is an ink ribbon for impact type printing that is impregnated with ink or impregnated with ink, and the ink ribbon is made by radially forming a seamless tube obtained by a bag weaving method. When used as an ink ribbon, the average thickness of the edge portion (2) is 62 (mm), and the average thickness of the base portion (1) is 6.2 mm.
1 (am), the ear portion (2) is subjected to a beating and rubbing treatment so as to satisfy the following relationship: d2-di≦0.012.

The present invention will now be described in detail.

The ink ribbon of the present invention is made of a seamless ribbon obtained by radially cutting a seamless tube obtained by a hollow weaving method.

□If you arrange several warp threads and weave two overlapping fabrics,
One tree of cotton yarn moves back and forth twice to form a ring shape, and eventually the weft threads proceed in a spiral shape to form a ready-made cylinder shape, resulting in a duplex-like fabric with the front and back sides tied together at both ends. This is the principle of bag weaving. However, various modifications are also possible. The thus obtained seamless tube is subjected to a process such as scouring and then radially melted to obtain a seamless ribbon.

There are no particular limitations on the types of warp and weft, but nylon,
Multificimene l-yarns such as polyester and silk are often used. Particularly important is nylon multifilament yarn.

As mentioned earlier, in the seamless tube obtained by the bag weaving method, the tension of the weft yarns as they reciprocate causes the ends of both ends to be pulled inward, and the density of the tissue at the ends of the ends of the wefts increases. cannot avoid being higher than other parts. The high density is also reflected in the thickness, and the thickness at both ear ends is about 15 to 20% or more than the other parts.

In the present invention, when the average thickness of the edge portion (2) when used as an ink ribbon is d2 (mm), and the average thickness of the base portion (1) is di (mm), iiJ edge portion (2 ) is subjected to beating and rubbing processing so as to satisfy the relationship d2-di≦0.012.

d2-di is 0.010 mm or less, and < 0
．． 008m+w or less, and preferably substantially close to zero. Note that the value of d2-dl may be negative.

The beating and rubbing process is usually performed at the seamless tube stage before scouring, but it can also be carried out after scouring. 6 After the seamless tube is melted in the radial direction to form a seamless ribbon, the beating and rubbing process is performed. However, from an industrial perspective, it is more advantageous to carry out the process at the seamless tube stage as described above.

7. Method of beating and rubbing the seamless tube (seamless ribbon in some cases) with an incus-like object, beating or rubbing with a brush-like or coil-like object,
Various methods are used, including a method of placing the material on a corrugated plate and rubbing it, a method of disintegrating it while stirring, a method of passing it between gears, and a method of applying a shearing force while sandwiching it between two plates.

A product ink ribbon is obtained by inking an ink ribbon having been subjected to beating and abrasion treatment such that the selvedge portions (2) satisfy the above-mentioned thickness relationship. The color of the ink can be arbitrary, but when producing a multicolor ink ribbon, it is often used in a total of four colors, blank, cyan, magenta, and yellow, in addition to two colors, black and red.

When preparing a multicolor ink ribbon, a border line is provided in advance in the longitudinal direction of the ribbon, and in each porter line, the sandwiched area is impregnated with ink of the respective color.

The ink ribbon of the present invention is useful as an ink ribbon for use in printers such as computer word processors.

Functions and Effects of the Invention In the ink ribbon of the present invention, the thickness of the edge portion (2) can be brought close to the thickness of the base portion (1) by the beating and rubbing treatment, so that it is easy to use the new ink ribbon when first using it. Even if there is a high-speed printing or the number of head bins is increased such as 24 dots or more, there will never be any problems such as the sharpness of the print being reduced when the ear (2) of the ink ribbon approaches the head. do not have.

Therefore, the original advantages of seamless ribbon are that there is no seam, so it does not require a single bow on the headbin, it has great durability, and it can be made more compact (there is a seam 1). In this case, the loop circumference must be increased to reduce the frequency of the head coming to joint 1, but in the case of a seamless ribbon, the loop circumference can be made small. --The only drawback of seamless ribbons, uneven printing at the edges, is completely eliminated.

EXAMPLES Next, the present invention will be further explained with reference to Examples and Comparative Examples.

Comparative Example A seamless tube A having a circumference of 1,600 mm was obtained by a single bag weaving method using 40d-34F nylon (66 nylon) multifilament yarns as the warp and weft. The thread density was set to 146 threads/1 nch for the warp and 148 threads/1 nch for the weft.

The seam 1/stube A of 1- was scoured and heat-set by a conventional method, and then melt-cut to 13 mm TtJ in the radial direction to form a seamless ribbon of 11 #.

The thickness of each part Gl of this seamless ribbon was as follows: 1 (part: average 0.141 mm 0.141 0.140.0.+42, 0.+41.0
．． +420.139.0.142.0. +43.0.1
40.0.141J1! ! Part: Average 0.121mm 0.120.0.121.0.122.0.120.0
．． l], 9゜0.1+9.0.120.0.123.0
．． +23. O, 1, 211 Jube / Jlj Department - 1, 17 When I inked this Sea 1 onto the ribbon and printed it at high speed with 24 dots, I found that the first 10 pages of printing were printed using m 1 of the ink ribbon. -Every time I reached the 1'' section, the printing in that section became lighter.

Example 1 The seamless chop A of Comparative Example I was pushed outward onto a cylinder and the ends of both ears were hammered. Thereafter, M kneading and heat setting were performed using a conventional method, and then the seamless ribbon was cut into 13 mm 11-J pieces in the radial direction to form 7 seamless ribbons.

2 The thickness of each part of this seamless ribbon was as follows.

Ears: ITL average 0.124mm 0.125.0.125.0.124.0. +22.0
．． 1213°0.121.0.123.0.12.5.
0. +24.0.125 area/average 0.121+im O, +22.0. +20.0. +19.0.121.0
．． 122°0, +18.0.121.0.122.0.
122.0.121r (: part/base part -1,03) When this seam l/slipon was inked and high-speed printing was performed with 24 dots, no uneven printing was observed at all from the beginning of printing.

Comparative Example 2 Using 40d-34F nylon (66 nylon) multifilament yarn as the warp and weft, a seamless tube B with a circumference of 2200 mm was obtained by a bag weaving method. The yarn density was set to 132 threads/1 nch for the warp and 142 threads/1 nch for the weft.

Seamless tube B shown in letter L was scoured and heated in a conventional manner, and then cut in the radial direction to a length of 8 mm 1 l-J to obtain a seam l slippon.

The thickness of each part of this seamless ribbon was as follows.

Ear: 0.141mm (average Qi of 10 points) Base: 0.118 weight (average of 10 points) Ear/base -1,18 This seamless ribbon was inked at high speed with 48 dots. When printing was performed, each time the head touched both ears of the ink ribbon, the print in that area became lighter for about 8 pages at the beginning of printing.

Example 2 The seamless tube B of Comparative Example 2 was pushed outward into a cylindrical body, and the ends of both ears were rubbed. After scouring and heat-setting using the usual method, it was fused in the radial direction to 8 mm 1 l.
Got a seamless ribbon.

The thickness of each part of this seamless ribbon was as follows.

Ear: 0.124mm (average value of 10 points) 4 J1! ! Part 0.119mm (], average value of point O)
Il, (Part/Body part-1,04) When this sheet 1-1l/sri ribbon was inked and high-speed printing was performed at 48 degrees, [•], no uneven printing was observed from the beginning of printing.

Comparative Example 3 Nylon (66 nylon) multifilament yarns of 40d-34F were used as the warp and weft, and a seam with a circumference of 1800+ am was created using the bag weaving method.

-BuC was obtained. The thread density is 180 warps/1nch,
9 threads were set to 162 trees/1 nch.

The seamless tube C shown in letter L was refined and heat-set by a conventional method, and then cut in the radial direction to 8 ml to obtain a seamless ribbon.

The thickness of each part of this seamless ribbon was as follows.

1f part・O, 149m+m (average value of 10 points) J1
! ! Part: O, 132n+m (Average value of 10 points) Part/1 part = 1.13 5 This Sea 1, ink on the ribbon and make 241"
When I printed at high speed with this kit, for the first 10 or so pages printed, each time the head touched both ears of the ink ribbon, the print in those areas became lighter.

Example 3 Seamless tube C of Comparative Example 3 is extrapolated to the cylinder and both 1
The r end was hammered. Thereafter, the ribbon was scoured and heat-set in a conventional manner, and then cut in the radial direction to a width of 81 mm to obtain a seamless ribbon.

The thickness of each part of this seamless ribbon was as follows: 1f part: O, 138 mm (average value of 10 points) Base part: 0.133 questions (average value of 10 points) Ear part/base part - 1
, 04 When this seamless ribbon was inked and high-speed printing was performed at 24 donts, no uneven printing was observed at all from the beginning of printing.

4-Ki Fraud Applicant Kitamura On 6

Claims (1)

[Scope of Claims] 1. An ink ribbon for impact printing that is impregnated with ink or impregnated with ink, the ink ribbon being made of a seamless ribbon obtained by radially cutting a seamless tube obtained by a hollow weaving method. , and the average thickness of the ear portion (2) when used as an ink ribbon is d2 (mm
), when the average thickness of the base (1) is d1 (mm),
An ink ribbon characterized in that the ear portion (2) is subjected to a beating and rubbing treatment so as to satisfy the relationship d2-d1≦0.012. 2. The ink ribbon according to claim 1, wherein the ear portion (2) is subjected to a beating and rubbing treatment so as to satisfy the following relationship: d2-d1≦0.010.