JP3055919B2 - ink ribbon - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an ink ribbon for impact printing.

2. Description of the Related Art As a single-color or multi-color ink ribbon used for a printer of a device such as a computer or a word processor, a woven fabric impregnated with ink is widely used.

Normally, no special back treatment or back coating is applied to the ink ribbon, but attempts have been made to improve the ink ribbon by providing a coating layer or film on one side of the ink ribbon.

For example, JP-A-59-164177 discloses an ink ribbon in which one surface of a base fabric is coated with a film-forming elastic resin such as a polyurethane resin, a polyester elastomer, or a nylon elastomer.

JP-A-58-160166 and JP-A-58-160167 disclose a typewriter ribbon having a coating layer formed of a polyurethane rubber elastic material on the surface of a base fabric.

Japanese Utility Model Application Laid-Open No. 60-60255 discloses an ink ribbon in which a fluororesin sheet is lined on the back surface of a synthetic fiber cloth.

JP-A-61-37965 discloses an ink ribbon in which one side of the ribbon is covered with a non-permeable film.

JP-A-62-157251 discloses an ink ribbon having a two-layer structure of a cloth ribbon and a plastic film.

JP-A-63-60651 discloses an ink ribbon in which a thin film made of a metal or an insulator is formed on at least one surface of a base cloth.

Japanese Utility Model Laid-Open No. 63-112049 discloses an ink ribbon for a wire dot impact printer having a plastic film backing.

In laminating a film on a base fabric, there has been proposed a method of bonding both of them only at both end edges.

That is, Japanese Utility Model Laid-Open Publication No. 51-145207 discloses a printing ribbon in which a plastics film is superposed on one side of an ink-impregnated ribbon and both sides are adhered at both ends.

JP-A-64-31670 discloses an ink ribbon having a configuration in which a polymer film ribbon is laminated on one side of a woven fabric ribbon and both are welded at both ends.

Problems to be Solved by the Invention The ink ribbon impregnated with ink in a woven fabric has no problem in normal speed printing or printing with a small number of head pins of 16 dots or less, but high speed printing or 24 dots, 32 dots In the case of printing with a large number of pins as described above, the sharpness of the printing deteriorates. Therefore, it is necessary to increase the warp / weft density and reduce the thickness of the cloth during weaving of the ribbon.

However, increasing the yarn density or thinning the fabric is naturally limited, and in the case of ultra-high-speed printing or printing such as 32 dots, it is not always possible to ensure the sharpness of printing even with such measures. There is a problem.

In addition, when performing multi-color printing, it is inevitable that color mixing occurs due to ink adhering to the pins of the head.

The above-mentioned application relating to providing a coating layer or a film on one side of an ink ribbon aims to solve such a problem, but the presence of the coating layer reduces the amount of ink impregnated into the base fabric. However, the flexibility of the ink ribbon itself tends to be impaired.

In this regard, when laminating the film on the base fabric, the method of bonding both of them only at both end edges can be expected not only to prevent a decrease in the amount of ink impregnated into the base fabric but also to ensure the flexibility of the ink ribbon itself.

However, with the increase in the number of pins of the head (that is, sharpening of the pins), high-speed printing, and multi-color printing, the durability of the film as a protective layer is insufficient,
It is becoming increasingly difficult to achieve its intended purpose.

The present invention has been made in view of such a situation, and has been made to provide an ink ribbon having higher quality.

Means for Solving the Problems In the ink ribbon of the present invention, a woven fabric thin film ribbon (2) in which a thin woven fabric provided with a polymer coating layer is superimposed on one side of a woven fabric ribbon (1), In addition, the two are integrated at least at an edge portion (3) or a border line portion (4) which is a boundary line for preventing color mixing.

Hereinafter, the present invention will be described in detail. In the following,
The “border line” means “a border line that is a boundary line for preventing color mixing”.

The raw fabric for the woven ribbon (1) is obtained by weaving using a polyamide or polyester multifilament yarn as a warp and a weft. Generally, for example, multifilament yarns such as 40d / 34f, 30d / 26f, and 30d / 12f are used, but are not limited to these. Further, yarns made of ultrafine fibers or ultrafine fibers can also be used. The average yarn density at the time of weaving is, for example, usually 130 to 180 yarns / inch in weft density and 140 to 170 yarns / inch in weft density, but may be higher.

As the woven ribbon (1), an endless ribbon, that is, a ribbon formed by connecting both ends of a tape can be used. However, a seamless ribbon, that is, a seamless ribbon obtained by slitting a tubular woven fabric obtained by bag weaving in the width direction is particularly preferable. This seamless ribbon has no seams, so there is no pin snagging, clarity of printing, durability of the ink ribbon, and compactness of the ribbon cassette. However, in the case of seamless, the diameter of the loop perimeter can be reduced.)

As a raw material for the woven fabric-containing thin film ribbon (2), a thin woven fabric provided with a coating layer made of a polymer is used. The coating layer refers to a coating layer, an impregnated layer, a laminate layer, and the like. In some cases, weaving is performed using the yarn to which the resin liquid is adhered, and after weaving, the adhered resin is polymerized to form a coating layer.

As the thin woven fabric serving as the core, a woven fabric woven with yarns made of various fibers including polyamide fibers and polyester fibers is used. Since it is required to be thin, as warp and weft, 20d or less, and even 15d
It is preferable to use the following.

Examples of the polymer to be coated on such a thin woven fabric by means of coating, impregnation, lamination, etc. include, for example, polyamide, polyester, polyurethane,
Polyvinylidene chloride-based, polyvinyl chloride-based, polyolefin-based, polystyrene-based, and cellulose-based polymers are used.

In the ink ribbon of the present invention, the woven fabric-containing thin film ribbon (2) is superimposed on one surface of a woven fabric ribbon (1), and both are integrated at least at an edge portion (3) or a border line portion (4). It has a simplified configuration. Either of the woven fabric and the coating layer of the woven fabric-containing thin film ribbon (2) may face the woven fabric ribbon (1).

The integration is usually performed by welding, but may be performed using an adhesive. Integration includes full integration and partial integration. In the case where the entire surface is integrated, it is preferable to use an adhesive. Comparing the full integration and the partial integration, the full integration may limit the amount of ink impregnated into the woven ribbon (1), so that the edge (3) and / or the border line ( In many cases, it is desirable to integrate only by 4), but it is more advantageous to integrate the entire surface from the viewpoint of preventing displacement due to the protrusion of the pin.

Such an ink ribbon is prepared by laminating a raw material for a woven ribbon (1) and a raw material for a woven thin film ribbon (2) with a hot blade, an ultrasonic welder, a laser beam, or the like. It is manufactured by fusing seal or welding to a predetermined width by the thermal means.

The border line (4) is a woven ribbon (1)
And the thin film ribbon (2) containing woven fabric may be formed by welding at the time of integration. Alternatively, the thin film ribbon (2) may be formed by ordinary border line forming means.

The inking for the ink ribbon having the above configuration is performed for the woven ribbon (1).

The color of the ink is arbitrary, but in the case of a multicolor ink ribbon, in addition to the two colors black and red, a total of four colors of cyan, magenta and yellow, which are the three primary colors of black and paint, are used.
Often color. In the latter case, blue is obtained by overprinting cyan and magenta, green is obtained by overprinting cyan and yellow, and red is obtained by overprinting magenta and yellow. Depending on the color, characters, images, graphs, etc. are printed.

When a multicolor ink ribbon is used, border lines are provided in the longitudinal direction of the ribbon in advance, and an area between the border lines is impregnated with ink of each color. The border line is applied or printed with various barrier or water repellent materials such as paraffin, wax, silicone, fluororesin, and other thermoplastic or thermosetting resins.
Alternatively, it can be formed by thermal fusion of the fibers constituting the ribbon. The number of border lines is one for a two-color ribbon, two for a three-color ribbon, and three for a four-color ribbon. The line width is preferably as narrow as possible,
For example, the thickness is 0.3 mm or less, and further 0.2 mm or less.

The ink ribbon of the present invention is useful as an ink ribbon used for a printer such as a computer and a word processor.

Function and Effect of the Invention The ink ribbon of the present invention has a woven fabric ribbon (1) in which a woven fabric-containing thin film ribbon (2) in which a thin woven fabric is provided with a polymer coating layer is superposed on one surface of the woven fabric ribbon (1). However, since it has a structure integrated at least at the edge portion or the border line portion, the projection of the pin of the print head at the time of printing is performed via the thin film ribbon (2) containing woven fabric. Thus, direct contact of the pins with the ink layer is prevented.

Since the thin film ribbon with woven fabric (2) has higher strength and higher durability than the polymer film (coating layer or film),
High-speed printing, printing with pins with a large number of pins and sharp pins can be sufficiently supported, and color mixing can be prevented even in a multicolor ribbon.

EXAMPLES Next, the present invention will be further described with reference to examples.

1 to 6 are perspective views showing examples of the ink ribbon of the present invention, in which (1) is a woven fabric ribbon, (2) is a thin film ribbon containing a woven fabric, and (3) is an edge portion of the ink ribbon. , (4) are border line portions.

Using a 40d nylon multifilament yarn as the warp and weft, a seamless woven fabric was obtained by a bag weaving method.
This was used as a tubular raw material for the woven ribbon (1).

Using a 5d or 10d nylon multifilament yarn as the warp and the weft, a seamless woven cloth was obtained.
The thin seamless woven fabric was coated or impregnated with a nylon resin solution or subjected to thermocompression bonding of a nylon thin film to obtain a tubular raw material for a woven fabric-containing thin film ribbon (2).

After inserting the tubular raw material for the thin ribbon with woven fabric (2) into the inside of the tubular raw material for the woven fabric ribbon (1) thus obtained, a fusing-sealing device or welding with the same. The ink ribbon shown in FIGS. 1 to 6 was produced by the apparatus.

In the ink ribbon of FIG. 1 which is a monochromatic ribbon,
The woven fabric ribbon (1) and the woven fabric-containing thin film ribbon (2) are welded only at both ends (3) and (3).

In the ink ribbon of FIG. 2 which is a two-color ribbon,
The woven fabric ribbon (1) and the woven fabric-containing thin film ribbon (2) are welded at both ends (3) and (3), and are also welded at the border line (4).

In the ink ribbon of FIG. 3 which is a three-color ribbon,
The woven fabric ribbon (1) and the woven fabric thin film ribbon (2) are welded at both ends (3) and (3), and are also welded at the two border line portions (4) and (4). ing.

In the ink ribbon of FIG. 4 which is a four-color ribbon,
The woven ribbon (1) and the woven cloth thin film ribbon (2) are welded at both ends (3) and (3), and three border line portions (4), (4) and (4). Are also welded.

In the ink ribbon of FIG. 5 which is a three-color ribbon,
The woven fabric ribbon (1) and the woven fabric thin film ribbon (2) are welded only at both end portions (3) and (3) (in the two border line portions (4) and (4), (It is not welded.) In the ink ribbon of FIG. 6 which is a three-color ribbon,
Woven ribbon (1) and woven cloth thin film ribbon (2)
Welding occurs only at the border line portions (4) and (4) of the strip (not welding at both end portions (3) and (3)).

Although not shown, the woven fabric ribbon (1) and the woven fabric-containing thin film ribbon (2) may be bonded over the entire surface.

[Brief description of the drawings]

1 to 6 are perspective views showing examples of the ink ribbon of the present invention. (1) woven ribbon, (2) thin-film ribbon containing woven fabric, (3) end edge of ink ribbon, (4) border line

Claims (2)

(57) [Claims] 1. A woven fabric ribbon (1) is superimposed on one side of a woven fabric-containing thin film ribbon (2) provided by coating a thin woven fabric with a polymer coating layer, and both are at least edge portions (1). 3) Or an ink ribbon having a configuration integrated with a border line portion (4) which is a boundary line for preventing color mixing. 2. The method according to claim 1, wherein the integration is performed by welding.
The ink ribbon as described.