JPH0373378A - Ink ribbon - Google Patents

Abstract

PURPOSE:To increase visibility of printing and besides to prevent an ink ribbon from being caught by a hole corner and further to prevent an high spot phenomenon by a method wherein the ribbon is formed with a specific non-plain weave fabric sheet. CONSTITUTION:There are diagonal twill weave fabric, satin weave fabric or variation fabric thereof, etc., as non-plain weave fabric. For a non-plain weave fabric sheet, a flat one is weaved and both ends are joined to make an endless ribbon. However, since an endless belt has a joint, a tubular sheet with no joint is obtained by a hollow weaving method and thereafter, that is radially fused to make a seamless ribbon. Nylon multifilament yarn, polyester multifilament yarn, etc., are used as a warp and a weft. By adopting the non- plain weave fabric, high density such as 170 threads/inch, 180 threads/inch, further 190 threads/inch or over is obtained. By inking of an ink ribbon of an abovementioned structure, the title product ink ribbon is obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to impact printing ink ribbons impregnated or impregnated with ink.

Prior Art Types of Ribbons Endless ribbons impregnated with ink are widely used as monochrome or multicolor ink ribbons for wire dot printers for computers, word processors, and other devices.

This endless ribbon is made by plain weaving using nylon multifilament or polyester multifilament yarns for the warp and weft, and then applying force to a predetermined width so that the warp direction is the length direction of the ribbon. ) and joining both ends to make it endless.

In the case of the endless ribbon described in E, the heat-pressing operation for flattening the joint may reduce the size of the ink-impregnated strip in this portion, resulting in unclear printing.

In order to prevent this, the manufacturing technology is advanced, but
The present applicant has produced a seamless ribbon by obtaining a tubular seamless (i.e., seamless) plain weave fabric using the bag weaving method, and then cutting it by melting in the radial direction. In this case, the weft direction of the woven fabric is the length direction of the ribbon, contrary to the case where an endless ribbon is obtained from the plain woven fabric.

<Type of thread, thread density> The warp and weft used in the production of the above endless ribbon and seamless ribbon are 40d/34f, 30d/26f of usually nylon (polyester in some cases).
, 30d/12f, and other multifilament yarns are used. The average thread density during weaving is set, for example, as follows.

Warp dense Honguchi nch! & yarn, /1ncha,
132 142b,
146 148c, 173
162d, 180
When the yarn density is relatively low as in 162a and 162b, there is flexibility in making the warp yarn density equal to the weft yarn density, making the warp yarn density slightly larger than the weft yarn density, or conversely making it smaller.

When the yarn density becomes large as in c and d, there is a certain limit to the weft yarn density, so the weft yarn density has to be smaller than the warp yarn density.

<Peripheral length and width of ribbon> The circumferential length of the ribbon can be arbitrarily set from about 100 mm or less to 6000 mm or more.

The width of the ribbon ranges from about 4m or less to 60m.
Various widths are used, such as about m or more. In the case of a single color, the width is narrow, and as the number of colors increases, the width should be adjusted accordingly.

(Printing mechanism) The ink ribbon is housed in a ribbon cassette, and is compressed by the printer needle at the part of its circumference that approaches the head, and the impregnated ink spreads uniformly in other parts. When used, the ink ribbon is stored in the cassette in a zigzag bent state.

In the impact printing method, a platen, paper, a perforated mask, an ink ribbon, and a 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 inserted through the hole in the mask. is struck against the paper, and the platen receives the impact.

Problems to be Solved by the Invention Ink ribbons made of woven fabric impregnated with ink do not pose much of a problem when printing at normal speeds or when printing with a small number of dots (16 dots or less), but when printing at high speeds or printing with a small number of dots (24 dots or more), When printing with a large number of head bins, the clarity of the print decreases, so measures are taken to increase the warp and weft density during ribbon weaving, or to make the fabric thinner.

In addition, in the impact printing method, the threads that run in the width direction of the ink ribbon (for endless ribbons, the weft threads during weaving, and for seamless ribbons, the warp threads during weaving) run in the length direction of the ink ribbon. Because it protrudes from the yarn that is heading (for endless ribbons, the warp during weaving, and for seamless ribbons, the weft during weaving), the corners of the hole in the mask get caught in the protruding part, resulting in smooth printing. There are things I can't do. To prevent such troubles,
At the time of ribbon weaving, the thread density is increased, the thickness of the fabric is adjusted, and the scouring and machining conditions after a-weaving are devised.

However, there is a natural limit to increasing the thread density or making the fabric thicker for the purpose of improving the clarity of the print or preventing catching, so it is not suitable for ultra-high-speed printing or printing with a large number of blanks. Even with such countermeasures, the problems listed in L cannot necessarily be resolved.

The shift to a higher number of dots and faster or ultra-higher printing speeds are trends of the times, and it is urgent to meet the demands of the times.

In addition, when conventional ink ribbons are stored bent in a zigzag shape in a ribbon cassette, ink tends to be highly impregnated at the bent tip where the compression force is relatively small, and the head is There is a phenomenon in which the print becomes darker each time the area of high impregnation is reached. This phenomenon (
(usually called highsbot) disappears after the ink ribbon goes around once, but it effectively prevents high spots at the start of printing.
No suitable means have been found to do so.

In view of this situation, the present invention improves the clarity of printing by -L.
The object of the present invention is to provide an ink ribbon which can prevent the ink ribbon from getting caught in the corners of the holes of the mask, and which can also prevent the Heissbot phenomenon.

Means for Solving the Problem The invention is directed to an ink ribbon for impact type printing for impregnating or impregnating with ink, characterized in that the ink ribbon is formed from a woven fabric with a non-plain weave structure. The gist of the paper is ``An ink ribbon that can

J: l'-r Detailed explanation of the present invention.

Examples of the non-plain weave structure include a diagonal weave structure, a satin weave structure, and variations thereof.

The diagonal weave structure is also called a twill weave structure, and has ridges called diagonal lines or twill lines formed in a diagonal direction. For diagonal weave texture.

1 1 2 2
3-/-/-/
−/ −/2 3 2
1 1+21 1
3 3/ -/
−／ −／ ・ ・ ・211
There are 4, 2, 3, etc. The above symbol represents the state of ups and downs in one cycle with numbers. Think of the horizontal line as the weft at the bottom of the organization chart, count the warp from the left, and write the number floating above this weft in the numerator. Write the number that sinks below this weft in the denominator.

Among the above, the numbers in the numerator and the number in the denominator are different,
In particular, the numbers in the numerator and the number in the denominator differ by two or more 1 3 1 4-/
−/ −/ 3 l 4 1 etc. are suitable.

Variations of oblique weave, such as broken oblique weave, steep oblique weave, slow oblique weave, single-turn oblique weave, skip oblique weave, twisted oblique weave, wicker oblique weave, overlap oblique weave, Day/night diagonal weave, chevron diagonal weave, decorative diagonal weave, etc. can also be used.

As the satin weave structure, five-ply satin, eight-ply satin, etc. can be used. Variations of the satin weave, such as irregular satin weave, layered satin weave, mikage weave, and quiet satin weave, can also be used.

The woven fabric of the L crime plain weave tissue can be made into an endless ribbon by weaving a flat piece and then joining both ends.

However, since endless belts have seams, it is desirable to obtain a tube-shaped seamless woven fabric by the bag weaving method and then melt it in the radial direction to make a seamless ribbon. Here, bag weaving refers to This is a method of weaving two solid pieces of fabric that are joined only at both ends while the weft threads are moved back and forth.

As the warp and weft, nylon multifilament yarn, polyester multifilament yarn, etc. are used. Conventionally widely used 40d/34f, 30d/26
In addition to filaments of f, 30d/12f, etc., those with various thicknesses or numbers of filaments are used. In addition, threads made of ultrafine fibers having a thickness of around 0.1 denier or less per filament can also be used.

Regarding the system density, the warp density is often the same as the conventional density, but the weft density can be significantly higher than the conventional density. For example, the upper limit of weft yarn density in conventional plain weave fabrics! If there is a little over 160 wood per inch,
170 pieces/1 nc by adopting a non-plain weave structure
h, 180 lines/1nch, even 190 thick/
The density can be increased to 1 nch or more.

A product ink ribbon is obtained by inking the ink ribbon having the above configuration. The color of the ink is arbitrary, but when producing a multicolor ink ribbon, in addition to the two colors of black and red, a total of four colors of black, cyan, magenta, and yellow are often used.

When producing a multicolor ink ribbon, border lines are provided in advance in the longitudinal direction of the ribbon, and the areas between the border lines are impregnated with ink of each color.

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

Function and Effects of the Invention The printing operation using the ink ribbon is schematically shown in FIG. (1) is a head, (2) is an ink ribbon, (3) is a mask, (4) is paper, and (5) is a platen.

In endless ribbon, the weft is the ink ribbon (2
), the weft threads are likely to get caught in the corners of the holes in the mask (3).In addition, when the tape is joined in an endless pattern, the joints may also cause catching or ink impregnation. This causes a decrease in quantity.

In a seamless ribbon, the positional relationship between the warp and weft is reversed from that of the endless ribbon, and the warp is in a state of protruding from the weft of the ink ribbon (2).
These warp threads tend to get caught in the corners of the holes in the mask (3).

However, in the ink ribbon of the present invention (whether it is an endless ribbon or a seamless ribbon),
Because it has a non-plain weave structure.

Due to the presence of floating threads, the protruding state of the weft or warp threads is alleviated and the threads become slippery, and the above-mentioned catching is significantly suppressed. However, there are still seams in the endless ribbon, so
Seamless ribbons are more advantageous.

The reason for the non-plain weave structure is that the warp and weft yarns have a loose structure compared to plain weave, so the amount of ink impregnated is large, and when the ribbon is stored in a zigzag shape in a ribbon cassette, the compressed areas are also sufficiently impregnated with ink. It is in a state where it is contributing to the defense IF of Hysbot mentioned earlier.

In addition, the non-plain weave structure allows weft yarns to be drawn in at a high density, making it possible to significantly increase thread density compared to conventional methods, resulting in faster printing, ultra-high speed printing, or a large number of held bins. Can correspond to printed dots.

Example Next, the present invention will be further explained with reference to Examples.

Example 1 A cylindrical seamless woven fabric with a circumference of 1600 mm was woven using a nylon multifilament yarn (66 nylon, 40 denier/34 filament) by a hollow weaving method.

The weave structure was a diagonal weave structure as shown in the structure diagram in FIG. FIG. 3 is a view taken along the arrows in FIG.

The warp density is 146 wood/8 nch, and the weft density is 180 wood/1 nch, which far exceeds the conventional upper limit (over 160 threads).
(However, up to approximately 190 wood eight ncb is possible).

This cylindrical seamless woven fabric was scoured and heat set by a conventional method, and then cut by melting in the radial direction to a width of 8 mm to obtain a seamless ribbon.

This seamless ribbon was inked, and the performance of the ink ribbon in 32-dot high-speed printing was investigated. The results were favorable as follows.

1. The sharpness of the print was very good. 2. The ribbon got caught in the corners of the holes in the mask. No catching occurred at all until the ink was consumed.

3. Example 2 in which the Heissbot phenomenon was not observed at the start of printing A cylindrical seamless woven fabric with a circumference of 800 cm was woven using a nylon multifilament yarn (66 nylon, 30 denier/26 filament) by the bag weaving method.

The weaving structure is It has a diagonal weave structure.

The warp density is 173 wood/1nch, and the a thread density is 185 wood/1n, which far exceeds the conventional upper limit (over 160 threads).
ch (however, up to about 200 wood eight inches is possible).

After scouring and heat setting this cylindrical seamless woven fabric using a conventional method, a border line is created and then 35 mm in the radial direction is formed.
It was cut to width to make a seamless ribbon.

Multicolor inking was performed on this seamless ribbon, and the performance of the ink ribbon in 32-dot high-speed printing was investigated. The clarity of the print was good, the ribbon was not caught in the corners of the holes in the mask, and no Heisbot phenomenon was observed at the start of printing.

Example 3 A cylindrical seamless woven fabric with a circumference of 800 mm was woven using a nylon multifilament yarn (66 nylon, 40 denier/34 filament) by a hollow weaving method.

The weaving structure was a five-ply satin weave.

The warp density is 146 threads/1nch, and the weft density is 180 threads.
Book/1nch (However, up to the end of 190/1nch is possible)
And so.

This cylindrical seamless woven fabric was scoured and heat-set by a conventional method, and after providing a border line, it was cut in the radial direction to a width of 8 cm to obtain a seamless ribbon.

I applied ink to this seamless ribbon, 32 dos,
The performance of the ink ribbon in high-speed printing was investigated. The brightness of the print was good, and no ribbon was caught in the corners of the mask holes.

No Heissbot phenomenon was observed at the start of printing.

Example 4 Single #a male thickness of 0.1 denier polyester ft
A fuller 2-tooth 5-ply satin was obtained by satin weaving using a Bm male multifilament yarn.

The warp density was 146 wood/8 nch, and the weft density was 175/1 nch (however, up to about 190/1 nch is possible).

The above-mentioned woven fabric was cut into a width of 8 cm, and then both ends were joined to form an endless ribbon with a circumference of 2200 m.

Ink this endless ribbon.

The performance of the ink ribbon in 32-dot high-speed printing was investigated. The clarity of the print was good, the ribbon was not caught in the corners of the mask holes (although there was slight tugging at the joint), and no Heissbot phenomenon was observed at the start of printing.

[Brief explanation of drawings]

FIG. 1 shows a printing operation using an ink ribbon.1. FIG. FIG. 2 is a tissue diagram of the diagonal weave structure employed in Example 1. FIG. 3 is a view taken along the arrows in FIG. (1)...Head, (2)...Ink ribbon, (3
)...Mask, (4)...Paper, (5)...Platen Figure 1 Figure 2

Claims (1)

[Claims] 1. An ink ribbon for impact printing that is impregnated with ink or is impregnated with ink, the ink ribbon being formed from a woven fabric with a non-plain weave structure. . 2. The ink ribbon according to claim 1, wherein the non-plain weave structure is a diagonal weave structure, a satin weave structure, or a variation thereof. 3. Claim 1, wherein the weft density is 170 threads/inch or more.
The ink ribbon mentioned.