JPH1191021A - Base cloth for ink ribbon, manufacture thereof and ink ribbon cartridge using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the durability of base cloth for an ink ribbon without deteriorating the printing quality thereof. SOLUTION: Regarding a first base cloth layer 1a prepared in a circle by joining the opposite end parts of a beltlike material formed by weaving warps and wefts and a second base cloth layer 1b prepared in a circle by joining the opposite end parts of the beltlike material formed by weaving the warps and the wefts, the first and second base cloth layers are made to overlap each other and joined together, with the positions of a joining part of the first base cloth layer 1a and the one of the second base cloth layer 1b shifted from each other so that they may not overlap each other, and thus base cloth having a higher impact transmission property in the direction perpendicular to the surface of the overlapping part than the first base cloth layer 1a is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a base fabric for an ink ribbon used in an impact type printer, a method for manufacturing the same, and an ink ribbon cartridge.

[0002]

2. Description of the Related Art An impact type printer device performs printing on a sheet of paper using an ink ribbon as an intermediate medium by operating a printing wire or a print hammer as a print head. The ink ribbon used here is built in a cartridge that is detachably attached to the printer apparatus main body, and is configured to sequentially supply a new ribbon surface to a print head position with printing.

Heretofore, as an ink ribbon used in such a printer, an annular ink ribbon base fabric formed by weaving a warp and a weft made of nylon multifilament yarn or the like and impregnated with liquid ink has been known. Widely used. In addition, in such an annular ink ribbon base fabric, a woven fabric is cut into a belt shape, and both ends thereof are joined to form an endless ribbon, and a tubular woven fabric woven by a bag weaving method is sliced. There is a seamless ribbon that can be obtained with a seamless.

However, in the case of the seamless ribbon, the length of the ribbon cannot be made too long due to a problem in the production thereof, so that the durability of the ink ribbon is limited. Also, the endless ribbon already has a ribbon length that is close to the limit of entering the ink cartridge. On the other hand, with the recent increase in the speed of printers, there is an increasing demand for improvements in the durability of ink ribbons. Therefore, it is desired to improve the durability of the ink ribbon itself.

[0005]

As one measure for improving the durability, it is conceivable to form a plurality of layers by laminating a base fabric for an ink ribbon. However, when the two ends of the ink ribbon base cloth are formed in a plurality of layers at the same position at the joint where both ends are joined, a pinhole is generated from the joined part, leading to the life of the ink ribbon, and the endless single-layer endless ink ribbon. No significant improvement in durability is obtained compared to ribbons. In addition, the responsiveness of the ink ribbon to the impact of the print head,
That is, there is a problem that the impact transmission performance is deteriorated and the printing on the paper becomes unclear, and that sufficient pressure cannot be transmitted to the paper side, so that printing on copy paper or relatively hard paper becomes difficult.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a multi-layered ink ribbon base fabric having improved durability without deteriorating the print quality, and an ink cartridge using the same.

[0007]

In order to achieve the above object, a base fabric for an ink ribbon according to the present invention has a first base material in which both ends of a belt-shaped body formed by weaving a warp and a weft are joined to form a ring. A second base fabric layer formed by joining both ends of a band formed by weaving a fabric layer and a warp and a weft into an annular body, wherein the joining portion of the first base fabric layer and the second base fabric The first and second base fabric layers are overlapped and joined at different positions where the positions of the layers do not overlap with the joining portions. Further, the first base fabric layer has a higher impact transmission property in the vertical direction of the surface than the first base fabric layer.

[0008] Here, the impact transmission property is defined as the ability to transmit the impact applied to one surface of the base fabric layer to the other surface. This can be measured, for example, by the difference in printing quality when printing is performed under the same conditions using different ink ribbon base fabrics in the wire diameter of the single fiber forming the warp and the weft, the number of bundles, and the like. .

In this case, it is preferable to use the first base fabric layer having higher wear durability than the second base fabric layer.

Here, in the continuous use of the conventional endless ribbon base fabric, the joint at both ends of the base fabric is severely damaged by the impact of the print head, and a pinhole is generated from this portion. Next, the inventors found that the base fabric surface on the paper side was damaged by abrasion, and the damage on the surface on the print head side was small. And it became clear that the damage of the joining part of the both ends of the base fabric and the damage of the surface on the paper side greatly affect the durability of the base fabric for endless ribbon.

The present invention is based on such knowledge, and the ink ribbon base fabric according to the present invention has a first base fabric layer on the paper side and a second base fabric layer on the print head side. It is preferable to use it, whereby the durability of the ink ribbon base fabric can be improved without impairing the impact transmission affecting printing quality.

Further, in order to improve the shock transmission, it is preferable that the thickness of the second base fabric layer is smaller than that of the first base fabric layer.

In this case, it is preferable that the thickness of the ink ribbon base fabric is 0.1 to 0.14 mm in order to achieve the same impact transmission performance as the conventional one-layer ink ribbon base fabric.

In order to make the first base fabric layer and the second base fabric layer different in impact transmission and abrasion durability, the second base fabric layer is different from the first base fabric layer in the warp or weft wire diameter, weaving, and the like. It is preferable that the density, the crimp rate, the number of bundles of the single fibers forming the warp and the weft, or the material be different.

Further, a step of forming a first base fabric layer in which both ends of a belt-shaped body formed by weaving a warp and a weft and forming an annular shape, and a step of weaving a warp and a weft are performed. Forming a second base cloth layer having both ends joined to form an annular shape, the second base cloth layer having a higher impact transmission property than the first base cloth layer; It is characterized by being manufactured by a process of overlapping and joining the first and second base fabric layers at different positions where the positions of the two bases do not overlap.

According to the above configuration, it can be easily manufactured.

The present invention further provides a base fabric for an ink ribbon,
Provided is an ink ribbon cartridge which is built in such that a second base fabric layer is located on a print head side of a printer device.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a perspective view of a two-layer type endless ribbon according to the present invention. As shown in FIG. 2, the two-layer type endless ribbon 1 is made up of two annular ribbons (hereinafter referred to as an inner base fabric 1a and an outer base fabric 1b) formed by joining both ends of a belt-shaped body formed by weaving a warp and a weft. It is formed by overlapping and joining both.
The joint portion A of the inner base fabric 1a is shifted so as not to overlap the joint portion B of the outer base fabric 1b, and the inner base fabric 1a and the outer base fabric 1b are both ends in the width direction (the hatched portions C in the figure). ) Are joined by heat welding, and then integrated by pressing the whole.

The inner base fabric 1a and the outer base fabric 1b are obtained by weaving and cutting warp and weft yarns to form a belt-like body, and joining both ends thereof. As the warp and the weft constituting each base fabric, multifilament yarns composed of ordinary or high-tension nylon 66, nylon 6, nylon 46 and the like are used, and nylon 66 is particularly preferable. The multifilament yarn is formed by collecting and twisting a large number of single fibers of about 0.8 to 3 deniers.
It is preferable to use a denier of 0 to 70 (diameter of warp and weft).

Here, in the two-layer endless ribbon 1 according to the present invention, a material having relatively higher wear durability than the outer base fabric 1b is selected as the inner base fabric 1a, and the inner base fabric 1b is used as the outer base fabric 1b. 1a, a material having a higher impact transmission property in the vertical direction of the surface is selected. Each base fabric is composed of a warp or a weft, the weaving density, the weaving density, the crimp rate, the number of bundles of single fibers forming the warp and the weft,
Or, it is specified by a material or the like. By making any one of the components of each of the base fabrics different between the two base fabrics, it is possible to change the relative wear durability and impact transmission.

The thinner the base fabric layer, the higher the impact transmission,
Since the thicker the base cloth layer is, the higher the wear durability is. Therefore, the constituent elements of each base cloth can be different so that the outer base cloth 1b is thinner than the inner base cloth 1a. For example, the wire diameters of the warp and the weft constituting the outer base fabric 1b are changed to the inner base fabric 1a.
The above configuration can be achieved by making it smaller than that of. Further, the above configuration can be achieved by relatively increasing the weaving density of the outer base fabric 1b or lowering the crimp rate, and further reducing the number of bundles of the single fibers constituting the warp and the weft. . In addition,
Here, the weaving density can be expressed as the number of warps or wefts per unit length (usually inches). The crimp rate is defined as L, the length of the warp or weft before weaving, and L1
After weaving, that is, the corresponding length on the base fabric, it can be expressed as crimp rate (%) = (L−L ₁ ) / L ₁ × 100.

Since the thickness of the endless ribbon 1 affects its shock transmission, it is preferable to minimize the thickness of the two-layer type endless ribbon as long as a predetermined durability can be ensured. In particular,
It is preferable that the thickness of the endless ribbon be about 0.1 to 0.14 mm. If the thickness is within this range,
This can be realized by overlapping and pressing a single-layer endless ribbon of about 0.10 to 0.15.

FIG. 3 shows an example in which the ink ribbon cartridge 10 is constituted by using the endless ribbon 1.
As shown in FIG. 1A, the endless ribbon 1 is passed between a feed wheel 2a and a feed auxiliary wheel 2b in a cartridge 10 and folded and stored in a bellows shape. The feed wheel 2a is driven to rotate in accordance with printing by the printer device. Since the feed assist wheel 2b presses the endless ribbon 1 against the feed wheel 2a by an urging member (not shown), the printed endless ribbon 1 is stored in the ribbon cartridge, and a new ink surface of the endless ribbon 1 is printed on the printing unit. Supply.

A part of the endless ribbon 1 is exposed to the outside of the cartridge 10, and printing on the paper P can be performed at that position. That is, the cartridge 10
The portion exposed to the outside of the endless ribbon 1 is located between the print head 15 and the paper P in a state in which is mounted on the printing unit of the printer device. Here, endless ribbon 1
The inner base fabric 1a is located on the paper P side, and the outer base fabric 1b is located on the print head 15 side.

When printing, the print head 15 is attached to the outer fabric 1.
An impact is applied to the endless ribbon 1 from the b side to instantaneously deform it. Due to this impact, the surface of the inner substrate 1a of the endless ribbon 1 comes into contact with the paper P, and as a result, the ink impregnated in the ribbon is transferred to the paper P. In this case, the joint A between the inner base cloth 1a and the inner base cloth is damaged by the abrasion of the paper P at the time of impact of the print head 15 and the paper feeding, and the outer base cloth 1b is set at the print head at the joint B. However, the endless ribbon 1 according to the present invention employs the inner base cloth 1a having high wear resistance and the outer base cloth. 1b, the inner base cloth 1a and the outer base cloth 1b are shifted at both ends in the width direction by shifting the position so that the joint A of the inner base cloth and the joint B of the outer base cloth do not overlap. C is thermally welded.

Thus, when the print head 15 impacts on the joint A of the inner base cloth, the outer base cloth 1b functions as a cushioning material to reduce the damage of the joint A of the inner base cloth, and When the print head 15 impacts the cloth joint B, the inner base cloth 1
“a” functions as a cushioning material and alleviates damage to the joint B of the outer base fabric.

As a result, it has become possible to improve the durability of the two-layer ribbon without deteriorating the printing quality which is a problem with the ribbon.

[0028]

Next, the results of comparing the two-layer endless ribbon according to the present invention (Examples 1 to 3) with the conventional one-layer endless ribbon (Comparative Example 1) are summarized in the following table.

[0029]

[Table 1]

The table shows that the total length is 4.5 in a low temperature environment of -5 ° C.
This is a result of printing on copy paper (carbon paper) using an endless ribbon having a width of 13 mm and a width of 13 mm. Here, the inner base fabric of the example has 4
Nylon 66 of 0D34F (40 denier, 34 filaments) was used, and nylon 66 of fineness less than that was used for the outer base fabric.

In order to evaluate the durability of the ink ribbon, alphanumeric characters were continuously printed, and the number of characters at the time when a pinhole was formed on the base fabric was used as a reference. As a result, it has been clarified that the life can be more than twice as long as that of the conventional product. In Examples 2 and 3, damage to the weft (10D26F) of the outer base fabric was relatively large, which affected the durability of the ribbon. Therefore, the weft of the outer base fabric is set to a higher fineness (for example, 20D26).
It is expected that the durability can be further improved by using F) or using high tensile nylon 66 or the like.

The print quality was evaluated based on the readability on copy paper at the time of 6 million prints. As a result, in each of the examples, printed characters could be read well on both sheets of copy paper.

[0033]

As described above, according to the first aspect of the present invention, a first base fabric layer formed by joining both ends of a belt formed by weaving a warp and a weft to form an annular shape, a warp and a weft, A second base cloth layer formed by joining both ends of a belt-shaped body formed by weaving the first base cloth layer into a ring-shaped body, and a position between a joint part of the first base cloth layer and a joint part of the second base cloth layer. Are formed by overlapping and joining the first and second base fabric layers at different positions where the first and second base fabric layers do not overlap with each other. The layer acts as a cushioning material, which alleviates damage to the joint of the first base fabric layer, and the first base fabric layer acts as a cushion when the print head impacts the joint of the second base fabric layer. It serves to reduce the damage to the joint portion of the second base fabric layer, and to improve the durability of the two-layer ribbon without lowering the print quality which is a problem with the two-layer ribbon. It was the ability.

Further, according to the constitutions of claims 2 to 6, the effect can be further enhanced. Further, according to the seventh aspect, it is possible to simplify the manufacturing, and according to the eighth aspect, it is possible to provide an ink cartridge having a high added value.

[Brief description of the drawings]

FIG. 1 is a perspective view of a two-layer type endless ribbon according to the present invention.

FIG. 2 is an enlarged view of a main part of an endless ribbon in a state before joining an inner base fabric and an outer base fabric.

FIGS. 3A and 3B are a plan sectional view (FIG. 3A) and a side view (FIG. 3B) of an ink ribbon cartridge incorporating an endless ribbon according to the present invention.

[Explanation of symbols]

 1a inner base cloth 1b outer base cloth 1 endless ribbon 2a feed wheel 2b feed auxiliary wheel 10 ink ribbon cartridge 15 print head P paper

Claims (8)

[Claims] 1. A first base fabric layer formed by joining both ends of a belt formed by weaving a warp and a weft to form an annular shape, and both ends of a belt formed by weaving a warp and a weft are joined. 2nd ring
The first and second base fabric layers at different positions where the joints of the first base fabric layer and the joints of the second base fabric layer do not overlap. A base fabric for an ink ribbon, wherein the base fabric is overlapped and joined. 2. The method according to claim 1, wherein the first and second base fabric layers have a higher impact transmitting property in a direction perpendicular to the surface of the first base fabric layer, and the first and second base fabric layers are overlapped and joined to each other. A base fabric for an ink ribbon, comprising: 3. The base fabric for an ink ribbon according to claim 1, wherein the first base fabric layer has higher wear durability than the second base fabric layer. 4. The base fabric for an ink ribbon according to claim 1, wherein said second base fabric layer is thinner than said first base fabric layer. 5. The base fabric for an ink ribbon according to claim 3, wherein said base fabric has a thickness of 0.1 to 0.14 mm. 6. The second base fabric layer is different from the first base fabric layer in the warp or weft wire diameter, weaving density, crimp rate,
5. The base fabric for an ink ribbon according to claim 1, wherein the number of single fibers forming the warp and the weft is different in any of the number of bundles and the material. 7. A step of joining both ends of a belt formed by weaving a warp and a weft to form an annular first base fabric layer, and both ends of a belt formed by weaving a warp and a weft. Forming a second base fabric layer formed by joining portions into an annular shape, the second base fabric layer having a higher impact transmitting property than the first base fabric layer; and a joining portion of the first base fabric layer and the second base fabric layer. Manufacturing the base fabric for an ink ribbon, comprising the steps of: overlapping and joining the first and second base fabric layers at different positions where the position with the second joining portion does not overlap. Method. 8. An ink ribbon cartridge, wherein the base fabric for an ink ribbon according to claim 1 is incorporated such that the second base fabric layer comes to a print head side of a printer device.