JPH0379380A - Ink ribbon - Google Patents

Abstract

PURPOSE:To improve the definition of printing and prevent hang-up of an ink ribbon at the corner of a hole on a mask and high spot phenomenon from occurring by a method wherein an ink ribbon is formed of a woven material which has non-plain texture, and a press-flattening treatment has been applied on the ink ribbon. CONSTITUTION:An impact type ink ribbon for printing is formed of a woven material which has non-plain texture, and also a press-flattening treatment is applied. For the non-plain texture, a twill weave texture, satin weave texture or variations of these textures can be considered. The woven material with non-plain texture is woven to be a flat texture and cut into a prescribed width, then by bonding both ends, it can be made into an endless ribbon. For warps and wefts, nylon multifilament yarn or polyester multifilament yarn, etc., is used. The woven material with non-plain texture is slightly thicker in thickness when composed with a woven material with plain texture; and therefore, a press treatment while heating to a certain degree by a calender roll, belt calender or other means is applied. By this method, the protruding condition of the warp or weft is alleviated, and hang-up is drastically suppressed.

Description

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

Background 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 plain-woven using nylon multifilament yarn or polyester multifilament yarn for the warp and weft, and the plain-woven fabric is cut to a predetermined width so that the warp direction is the length direction of the ribbon, and both ends are cut. It is manufactured by joining to make an endless piece.

The endless ribbons described above have poor productivity because they are joined one by one by fusing and thermal pressure, and the joining process reduces the amount of ink impregnated at the joint, resulting in unclear printing. be. In order to prevent this, the manufacturing technology is advanced, but the applicant obtained a tube-shaped seamless (that is, seamless) plain-woven fabric using the bag weaving method, and then woven it in the radial direction. The company manufactures seamless ribbons that are melt-cut. 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 endless ribbon and seamless ribbon described in H are usually 40d/34f, 30d/26f of nylon (or polyester in some cases).
, 30d/12f, and other multifilament yarns are used. The average thread density during weaving is set, for example, as follows.

Thread +, /inch Weft thread /inch
a, 132 142b,
146 148c, 1
73 162d, 180
, For normal density products such as 162a and semi-high density products such as b, the warp density is made equal to the weft density, or the warp density is made slightly larger than the weft density.

On the other hand, it is flexible, such as making it smaller.

When it comes to high-density products like c and d, there is a certain limit to the weft density, so the weft density has to be smaller than the warp 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 layers or more.

The width of the ribbon is about 4m layer or less.

Various widths are used, such as about 60 layers 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 hit by the printer needle at a portion of its circumference when it approaches the head, and the impregnated ink is diffused and made uniform in other portions. When a compact cassette is 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 a normal speed or when printing with a small number of dots (16 dots or less); Alternatively, when printing with a large number of head bins such as 24 dots, 48 dots, or 56 dots, the clarity of the print decreases, so it is necessary to increase the warp and weft density during ribbon weaving, or make the fabric thinner. Efforts have been made to

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 setting conditions after weaving are devised.

However, improved print clarity and anti-snag 1F
There is a natural limit to increasing the thread density or making the fabric thinner for the purpose of It cannot 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 it reaches a highly impregnated area. This phenomenon (
Normally, high speed (referred to as high speed) disappears when the ink ribbon goes around once, but no suitable means has been found to effectively prevent high speed during the start of printing.

In view of this situation, the present invention improves the clarity of printing by -F.
The purpose of this 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 ispot phenomenon.

Means for Solving the Problems The present invention provides an ink ribbon for impact printing for impregnating or impregnating with ink, the ink ribbon being formed from a woven fabric with a non-plain weave structure,
An ink ribbon characterized by being subjected to pressure flattening treatment.''

The present invention will be explained in detail below.

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. Diagonal weave textures include, etc. The above symbol is a numerical representation of the state of ups and downs in one cycle.The horizontal line is considered to be the weft at the bottom of the organization chart, and the warp is counted from the left. Write the number that floats above the weft as the numerator, and write the number that sinks below this weft as the denominator.

Among the above, the number in the numerator and the number in the denominator are different,
In particular, it is preferable that the number in the numerator and the number in the denominator differ by two or more.

Variations of oblique weave, such as broken oblique weave, steep oblique weave, slow oblique weave, curved oblique weave, skip oblique weave, twisted oblique weave, wicker oblique weave, single layer 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 in the satin weave texture, such as irregular satin weave, layered satin weave, mikage weave, day/night satin weave, etc., can also be adopted.

Note: A non-plain weave fabric can be made into an endless ribbon by weaving a flat piece, curling it into a width, and then joining both ends.

However, since endless belts have seams, it is desirable to obtain a 1,000-tube seamless woven fabric using the bag weaving method, and then melt it in the radial direction to make a seamless ribbon. is a method of weaving two overlapping woven fabrics that are joined only at both ends while the weft threads are reciprocated.

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 such as f, 30d/12f, 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 yarn density, the warp yarn density is often the same as the conventional yarn density, but the weft yarn density can be significantly higher than the conventional yarn density. For example, if the upper limit of weft yarn density is just over 160 yarns per inch in a conventional plain weave structure,
170*/in by adopting a non-plain weave structure
ch, 180 wood/inch, even 190 wood/in
The density can be increased to ch or even higher.

Woven fabrics with a non-plain weave structure tend to be slightly thicker than fabrics with a plain weave structure. Increasing the thickness of the ink ribbon beyond the allowable range should be avoided in terms of ink ribbon performance. Therefore, in the present invention, a woven fabric with a non-plain weave structure is pressurized by a calender roll, a belt calender, or other means. Process. It is desirable to heat to a certain extent when pressurizing, the pressure is 0.5 to 5 kg/cm
It is appropriate to set the temperature to about 40-180℃, but it is not necessarily limited to this range.
Formation of the fabric into a film must be strictly avoided, so when the temperature is relatively high, it is necessary to take measures to reduce the pressure or pressurize time.

It is desirable that the thickness of the ink ribbon be reduced to, for example, 0.150 mm or less, particularly 0.140 mm or less, by the pressure treatment described in -F.

A product ink ribbon is obtained by performing inking on the ink ribbon of 1-storic acid. However, in the case of endless ribbons, single-color inking is usually done at the woven fabric stage. The color of the ink is arbitrary, but when making 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 used.
When using multicolor ink ribbons, which are often colored,
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, (0 is paper, and (5) is a platen.

In general, in endless ribbons, the weft threads protrude from the warp threads of the ink ribbon (2), so the weft threads tend to get caught in the corners of the holes in the mask (3).
The joints when tapes are joined in an endless manner also cause snags and a decrease in the amount of ink impregnated.

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),
Since it has a non-plain weave structure, the presence of floating yarns alleviates the protruding state of the weft or warp yarns and makes them slippery, and the above-mentioned snags are significantly suppressed. However, since seams still exist in endless ribbons, 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. This contributes to the prevention of high spots (L) 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.

Note that the increase in thickness due to the non-plain weave structure is reduced to an allowable range by pressure treatment, so no problem arises in this respect.

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 inches, and the weft density is 180 wood 8 inches, which far exceeds the conventional upper limit (over 160 threads).
However, up to about 190 pieces/inch is possible).

This cylindrical seamless woven fabric was scoured and set by a conventional method, and then calendered at a temperature of 70° C. and a pressure of 1 kg/c layer 2G. Then, it was fused in the radial direction into eight layers,
Made into a seamless ribbon.

Inking is done on this seamless ribbon, 32-56
The performance of the ink ribbon in high-speed dot 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 am 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/inch, and the weft density is 185 wood/inch, which far exceeds the conventional upper limit (over 160 threads).
h (however, up to about 200 pieces/inch is possible).

This cylindrical seamless woven fabric was scoured and set in a conventional manner, then calendered in the same manner as in Example 1, a border line was provided, and the fabric was melt-cut in the radial direction to a width of 35 cm to obtain a seamless ribbon.

Multicolor inking is done on this seamless ribbon, 32 ~
The performance of the ink ribbon in 56-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, and no high spot phenomenon was observed at the start of printing.

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

The weaving structure was a five-ply satin weave.

The warp density is 146 wood/inch, and the weft density is 180.
Kihachi inch (however, up to about 190 pieces/inch is possible)
And so.

This cylindrical seamless woven fabric was scoured and set by a conventional method, calendered in the same manner as in Example 1, a border line was provided, and then cut by melting in the radial direction to a width of 81 cm to obtain a seamless ribbon.

Inking is done on this seamless ribbon, 32-56
The performance of the ink ribbon in high-speed dot printing was investigated. The clarity of the print was good, the ribbon was not caught in the corners of the mask holes, and no high spot phenomenon was observed at the start of printing.

Example 4 A flat five-ply satin was obtained by satin weaving using a multifilament yarn of ultrafine polyester fibers having a single fiber thickness of 0.1 denier.

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

The woven fabric described in section h was inked and cut into a width of 8 m, and then both ends were joined to form an endless ribbon with a circumference of 22,001 layers.

Regarding this endless ribbon, the performance of the ink ribbon in high speed printing of 32 to 56 dots was investigated.

The clarity of the print was good (although there was a slight blur at the joint), the ribbon was not caught in the corners of the mask holes, and no high spot phenomenon was observed at the start of printing.

[Brief explanation of drawings]

FIG. 1 is a schematic explanatory diagram showing a single character operation using an ink ribbon. 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.

Claims (1)

[Scope of 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 and subjected to pressure flattening treatment. An ink ribbon characterized by being decorated with. 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.