JPH11115289A - Ink ribbon and ink ribbon cartridge employing the ribbon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a duplicative property, and prolong the life of fabric concurrently even to crude paper by forming the foundation of an ink ribbon with a disparate characteristics two-superimposition sheet, and employing yarn having superior wear resistivity for the foundation. SOLUTION: An ink ribbon 1 is formed into a two-layer structure such that each foundation 21, 22 is heat welded to be superimposed at its edge portion 23. The ink ribbon formed in this manner is in a shape of being cut into circular slices because of using seamless work. The two layer ink ribbon 1 undergoes reiterately hammer impact force at at all times in its outside, while its inside is compressed against recording paper as receiving applied pressure. The outside ribbon compressed by printing means is made by a foundation of high tension yarn with high rupture strength and via the inside ink ribbon with the result that the inside ink ribbon functions as a damper, thus preventing fiber from being crushed through compression on impact of the ink ribbon at the side of printing means, and allowing the prolongation of life of the ink ribbon.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an ink ribbon used in an impact dot or character ring type printing apparatus and a ribbon cartridge using the same.

[0002]

2. Description of the Related Art In general, an ink ribbon is formed by enclosing a base cloth impregnated with ink in an ink cartridge and installed between a recording sheet and a printing means to form a hammer or a print ring. By hitting and pressing, the ink is transferred and printing is possible. This base cloth is made by cutting a seamlessly processed base cloth into a predetermined width to form an endless type ribbon on a round slice, and impregnated with ink. It was common to install a reservoir to replenish the used ink. These base cloths are usually composed of one base cloth.

The fabric life of the base fabric of the ink ribbon will be described. Hereinafter, the number of times the ink ribbon 1 starts to be repeatedly beaten and cut by the hammer is represented by the number of characters and is referred to as fabric life. Further, recording paper having a rough surface and containing a large amount of inorganic fine particles is referred to as rough paper. The copying ability when the printing apparatus prints a plurality of overlapping copy papers is called copyability. The high-tensile yarn refers to a yarn having a tensile strength that is 1.1 to 1.5 times that of a known printer yarn (normal yarn) proposed in Japanese Patent Application Laid-Open No. 4-111111 (Asahi Kasei Corporation). In the present invention, those having a breaking strength of 7 gf / D or more are referred to.

[0004] When printing on recording paper, especially on rough paper, the fabric inside the ink ribbon is easily damaged. For this reason, a plain weave base fabric of 40 denier (hereinafter referred to as D) × 34 filaments (hereinafter referred to as F), which is a standard yarn of a normal yarn having a breaking strength of 6 gf / D, is used.

On the other hand, the thickness of an ink ribbon used in a printing apparatus that requires copying properties such as ECR is preferably as thin as possible in terms of copying properties, and an appropriate thickness is 0.10 to 0.13.
mm.

[0006]

As described above, in order to extend both the life of the fabric on rough paper and to secure the copying properties unique to the ink ribbon for a dot printer, a conventional structure is required. In this case, it was not possible, and the demand for long life was abandoned.

[0007] In addition, a user who desires printing with a long fabric life has no choice but to use one ink ribbon having a long circumference (the length of one circumference of the ink ribbon). The maximum length of the seamless ribbon is limited to about 2 m due to its manufacturing method (knitting in a circumferential shape). Therefore, there has been a long-awaited demand from the market for a long-life ink ribbon for bad paper.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to provide an ink ribbon having a limited circumference and a copy property without adding a special mechanism component to the ink cartridge. It is an object of the present invention to provide an ink ribbon capable of significantly extending the fabric life even for rough paper while ensuring the same.

[0009]

The present invention has the following means to solve the above-mentioned problems.

According to the present invention, there is provided an ink wherein the base fabric of the ink ribbon is constituted by two sheets having different characteristics, and the base fabric is formed on the recording medium side by using a thread having good abrasion resistance. It is a ribbon.

Further, a high-tensile yarn having a breaking strength of 7 gf / D or more is disposed on one or both of the warp and the weft on the recording medium side.

The yarn of the base cloth on the side of the recording medium is 40D34.
F or 30D26F.

Further, the crimp rate of the yarn used for the base fabric is smaller by 2% to 5% on the recording medium side.

Further, in an ink ribbon cartridge used in a printing apparatus for transferring ink to a recording medium by the impact or pressure of a printing means via an ink ribbon, the ink ribbon base fabric is formed by overlapping two sheets having different characteristics. An ink ribbon cartridge characterized in that a base cloth is formed on the side of the base using a thread having good abrasion resistance.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to embodiments. FIG. 1 is a plan view of the ink ribbon cartridge used in the present invention in which an upper case is removed. Using this, the structure of the cartridge and the operation of the ink ribbon will be described.

The ink ribbon 1 is interposed between the driven gear 11 engaged with the driving gear 6 to obtain a moving force. The ink ribbon 1 in the cartridge is pressed by a regulating spring or the like in order to move the ink ribbon 1 at a constant tension during printing. Reference numeral 2 denotes a recording sheet, which is one type of recording medium.

The transfer roller 5 transfers the ink impregnated in the ink reservoir 9 to the ink ribbon 1 and contacts the recording paper 2 side (hereinafter, the inside) of the ink ribbon 1 to obtain a rotational force. When the ink ribbon 1 moves between the hammer 3 and the recording paper 2 in the head, and is pressed against the hammer 3 side (hereinafter, the outside) of the ink ribbon 1 by the hammer 3,
The inner side of the ink ribbon 1 is transferred to the recording paper 2 for a predetermined time and with a predetermined pressure, and the ink of the ink ribbon 1 is transferred to the recording paper 2. The above components are housed in a lower case 7, and an upper case (not shown) is fixed to form an ink ribbon cartridge.

Next, the flow of ink will be described. The ink stored in the ink storage body 9 moves to the wick 10 provided with the ink storage body 9 by capillary action. When the transfer roller 5 rotates clockwise in FIG. 1, the ink of the wick 10 is scraped off by the transfer roller 5 and is transferred to the ink ribbon 1 in contact therewith.

The ink transferred to the ink ribbon 1 moves together with the ink ribbon 1 and is pressed by the head 4 to be transferred to the recording paper 2 and printed.

FIG. 2A is a sectional view of the ink ribbon of the present invention, and FIG. 2B is a schematic view showing the whole.
As shown in the figure, the ink ribbon 1 has a two-layer structure in which two fabrics 21 and 22 having different characteristics are heat-welded at an edge portion 23 and overlapped. Generally, such an ink ribbon has a ring-shaped configuration because seamless processing is used.

FIG. 3 is an enlarged view of a cross section of the ink ribbon of the present invention. This indicates that two base cloths having different fiber degrees or densities are stacked to form an ink ribbon.

Example 1 A two-layer ink ribbon 1 was
One piece of the base cloth made of high tension nylon 66 (polyamide 66) and one piece of the base cloth made of ordinary thread nylon 66 (polyamide 66) are stacked, and the ends are melted and cut off by applying heat while applying pressure, and the length is 300 mm. It is a seamless ribbon.

In one layer, 1a is a weft, 1b is a warp, and a high-tensile yarn having a breaking strength of 7 gf / D or more is 40D (denier) × 3.
4F (number of filaments) plain weave base fabric, the number of threads is 146 / inch for warp and 148 / inch for weft, and the other layer is 146 / inch for 1d with 40D × 34F ordinary thread. Warp and 1c is ordinary yarn 4
One ink ribbon is formed by superimposing a plain weave base fabric having a construction of 148 wefts / 0D × 34F and the number of shots. At this time, the thickness of one base cloth is approximately 0.10 m.
m.

FIG. 4 shows a state in which the so-called ironing process for flattening the ink ribbon having the structure shown in FIG. By this flattening process, the thickness of the ink ribbon 1 can be reduced from 0.10 to 0.07 mm.

The number of shots is 146 × 148 and 14
The crimp rate was 6 × 148 and the crimp rate was about 4%. If the crimp rate is high, a hammer will be caught on the ink ribbon and this will cause cutting of the fabric, so the appropriate crimp rate is 2 to 5%.

The ink ribbon 1 is in contact with a transfer roller 5 on the surface of which ink transmitted from one end of the wick 10 is applied, and the ink is supplied by this contact.

At this time, the ink is transferred to the inside (1a and 1b) of the two-layered ink ribbon 1. With the rotation of the driving gear 6 that transmits the driving torque of the printer, the ink ribbon 1 is rotated by the hammer 3 stored in the recording paper 2 and the head 4.
Move between. Although not shown in the drawing, the hammer 3 having obtained the printing pressure by the excited coil hits the ink ribbon 1 and hits the recording paper 2. The ink is reflected on the recording paper 2 and printed during the hitting. At this time, the pressure of the hammer 3 is transmitted through the ink ribbon 1 to the plurality of stacked recording sheets 2. The color is developed by the pressure of the hammer 3 from which the pressure-sensitive resin applied to the second and subsequent recording sheets 2 is transmitted. If the thickness of the ink ribbon 1 is large or the crimp ratio is large, the printing becomes unclear or the coloring is hindered.

In consideration of copyability, the ink ribbon of the present invention is excellent in transmitting an impact force because the thickness is 0.13 or less.
Five copies can be made from one copy.

Next, the printing durability will be considered. In the two-layer ink ribbon 1, the outer ink ribbon 1 (hammer 3 side) receives the impact force of the hammer 3 repeatedly. On the other hand, the inside of the two-layer ink ribbon 1 (recording paper 2
The ink ribbon 1 is pressed against the recording paper 2 while receiving the applied pressure.

Particularly, in the case of inferior paper, a sharp shape is contained, and a large amount of inorganic material having high hardness is contained. Therefore, the thread of the ink ribbon 1 in contact is greatly damaged, and the fabric life is extremely shortened. The high-tensile yarn having a breaking strength of 7 gf / D used in the present invention has a longer fabric life than the ordinary yarn with respect to coarse paper. Printing was performed on inferior paper with the two-layered ink ribbon 1, and a printing durability test was performed to check the life of the fabric.

The cut portion of the ink ribbon 1 was generated from the inside and was not seen from the hammer 3 side.

Printing durability was achieved with inferior paper, and the fabric life was 6 million characters. At the same time, two clear copies were confirmed. As a result of observing the surface with a magnifying glass, the fact that the inner base cloth was cut first was a result indicating that the outer base cloth could be made thinner. As a precautionary measure, when the drive gear 5 of the ink cartridge was measured with a torque measuring instrument, 55
g showed almost no difference from the initial torque.

Good running stability was exhibited without any failure phenomenon such as detachment of the ink cartridge due to an increase in torque. When 0.4 g of the ink was first injected into the wick 2 and the durability was evaluated, the ink life was confirmed up to 3 million characters.

[Example 2] The two-layer ink ribbon 1 used in the present invention is made of one base cloth made of high tension nylon 66 (polyamide 66) and one sheet of ordinary thread nylon 66 (polyamide 66). , And the ends are melted by heat while applying pressure, and cut off to form a seamless ribbon having a length of 300 mm.

In FIG. 2, 1d is a high-tensile yarn 40D × 34F having a breaking strength of 7 gf / D and a warp yarn driven at 135 yarns / inch, and 1c is a high-tensile yarn 40 having a breaking strength of 7 gf / D.
Dx34F, one layer inside the weft with a driving number of 140 / inch, and 1d a high tension yarn 40D with a breaking strength of 7 gf / D
With a warp of 135 yarns / inch at × 34F, 1
c is a high-strength yarn 40D × 34F having a breaking strength of 7 gf / D, and a single layer of plain weave base fabric of 140 yarns / inch is driven into a seamless ribbon. In the state of the base cloth, the thickness of the ink ribbon 1 is reduced to 0.09 by applying a so-called ironing process for flattening by heat and pressure.
5 to 0.065 mm.

The number of shots is 135 × 140 and 13
The number of crimps was 5 × 140 and the crimp rate was about 5%.

The ink ribbon 1 is in contact with the transfer roller 3 on the surface of which the ink transmitted from one end of the wick 10 is applied, and the ink is supplied by this contact.

At this time, the ink is transferred to the inside (1a, 1b) of the two-layered ink ribbon 1. With the rotation of the driving gear 6 that transmits the driving torque of the printer, the ink ribbon 1 is rotated by the hammer 3 stored in the recording paper 2 and the head 4.
Move between. Although not shown in the drawing, the hammer 3 having obtained the printing pressure by the excited coil hits the ink ribbon 1 and transmits the pressure to the recording paper 2. The ink is reflected on the recording paper 2 and printed during the hitting. At this time, hammer 3
Is transmitted through the ink ribbon 1 to the plurality of recording sheets 2 stacked. The color is developed by the pressure of the hammer 3 from which the pressure-sensitive resin applied to the second and subsequent recording sheets 2 is transmitted.

In consideration of copyability, the ink ribbon of the present invention is excellent in transmitting impact force because the thickness is 0.13 or less.
Five to five copies were possible.

Consider printing durability. In the two-layer ink ribbon 1, the outer ink ribbon 1 (hammer 3 side)
Receives the impact of the hammer 3 repeatedly. On the other hand, the ink ribbon 1 inside the two-layered ink ribbon 1 (on the side of the recording paper 2) receives the recording paper 2 while receiving the applied pressure.
Is crushed.

Particularly, in the case of rough paper, the thread of the ink ribbon 1 is greatly damaged due to the sharpness and high hardness included, and the fabric life is extremely shortened. The high-tensile yarn used in the present invention has a longer fabric life on plain paper than on plain yarn.

Printing was performed on rough paper using the two-layered ink ribbon 1, and a printing durability test was performed to check the life of the fabric. The cut portion of the ink ribbon 1 was generated from the recording paper side and was not seen from the hammer 3 side. Even after printing with poor quality paper, three clear copies could be made even after printing 5.5 million characters. As a result of observing the surface with a magnifying glass, the fact that the inner base cloth was cut first was a result indicating that the outer base cloth could be made thinner.

As a precautionary measure, when the drive gear 5 of the ink cartridge was measured by a torque measuring device, the result was 50 g and the result was almost the same as the initial torque. No defective phenomena such as detachment of the ink cartridge due to an increase in the torque were observed, and good running stability was exhibited. When 0.4 g of the ink was initially injected into the wick 2 and the durability was evaluated, the ink life was confirmed up to 2.3 million characters.

Embodiment 3 A two-layer ink ribbon 1 is
One piece of the base cloth made of high tension nylon 66 (polyamide 66) and one piece of the base cloth made of ordinary thread nylon 66 (polyamide 66) are stacked, and the ends are melted and cut off by applying heat while applying pressure, and the length is 300 mm. It is a seamless ribbon.

One layer is a weft yarn 1a, a warp yarn 1b, and a plain weave base fabric of 30D × 26F high tensile strength yarn having a breaking strength of 7 gf / D.
80 / inch, the other layer has 1d of plain yarn 30
With a D × 26F warp of 188 yarns / inch,
1c is a regular yarn 30D × 26F and the number of driving is 180 /
One ink ribbon is formed by superimposing a plain-woven base fabric having an inch weft. The thickness at this time is one base cloth,
It is approximately 0.09 mm.

FIG. 4 shows a state in which a so-called ironing process for flattening the ink ribbon having the structure shown in FIG. By this flattening process, the thickness of the ink ribbon 1 can be reduced from 0.09 to 0.065 mm.

The number of shots is 188 × 180 and 18
The crimping ratio was 8 × 180 and the crimp rate was about 4%. If the crimp rate is high, a hammer will be caught on the ink ribbon and this will cause cutting of the fabric, so the appropriate crimp rate is 2 to 5%.

The ink ribbon 1 is in contact with the transfer roller 5 on the surface of which the ink transmitted from one end of the wick 10 is applied, and the ink is supplied by this contact.

At this time, the ink is transferred to the inside (1a and 1b) of the two-layered ink ribbon 1. With the rotation of the driving gear 6 that transmits the driving torque of the printer, the ink ribbon 1 is rotated by the hammer 3 stored in the recording paper 2 and the head 4.
Move between. Although not shown in the drawing, the hammer 3 having obtained the printing pressure by the excited coil hits the ink ribbon 1 and hits the recording paper 2. The ink is reflected on the recording paper 2 and printed during the hitting. At this time, the pressure of the hammer 3 is transmitted through the ink ribbon 1 to the plurality of stacked recording sheets 2. The color is developed by the pressure of the hammer 3 from which the pressure-sensitive resin applied to the second and subsequent recording sheets 2 is transmitted. If the thickness of the ink ribbon 1 is large or the crimp ratio is large, the printing becomes unclear or the coloring is hindered.

In consideration of copyability, the ink ribbon of the present invention is excellent in transmitting an impact force because the thickness is 0.13 or less.
Five copies can be made from one copy.

Next, the printing durability will be considered. In the two-layer ink ribbon 1, the outer ink ribbon 1 (hammer 3 side) receives the impact force of the hammer 3 repeatedly. On the other hand, the inside of the two-layer ink ribbon 1 (recording paper 2
The ink ribbon 1 is pressed against the recording paper 2 while receiving the applied pressure.

Particularly, in the case of inferior paper, a sharp shape is contained and many inorganic substances having high hardness are contained. Therefore, the thread of the ink ribbon 1 in contact is greatly damaged, and the fabric life is extremely shortened. The high-tensile yarn used in the present invention has a longer fabric life on plain paper than on plain yarn. Printing was performed on inferior paper with the two-layered ink ribbon 1, and a printing durability test was performed to check the life of the fabric.

The cut portion of the ink ribbon 1 was generated from the inside and was not seen from the hammer 3 side. Printing durability was achieved with inferior paper, and the fabric life was 3.5 million characters. At the same time, three clear copies were confirmed. As a result of observing the surface with a magnifying glass, the fact that the inner base cloth was cut first was a result indicating that the outer base cloth could be made thinner. As a precautionary measure, when the drive gear 5 of the ink cartridge was measured by a torque measuring device, the result was 45 g, which was almost the same as the initial torque.

No defective phenomena such as detachment of the ink cartridge due to an increase in torque were observed, and good running stability was exhibited. When 0.4 g of the ink was first injected into the wick 2 and the durability was evaluated, the ink life was confirmed up to 3 million characters.

Examples of these are summarized in Table 1.

Next, a sample for comparison with the embodiment was prepared and its characteristics were examined.

Comparative Example 1 The two-layered ink ribbon 1 of Comparative Example 1 has a length of ordinary yarn nylon 66 (polyamide 66), which is obtained by stacking two base fabrics and applying pressure to melt and cut off the ends with heat. It is a seamless ribbon of 300 mm in length.

In FIG. 2, 1d is ordinary yarn 40D × 34F.
146 yarns / inch warp yarns, 1c is a normal yarn 40D × 34F, one layer inside the weft yarns 148 yarns / inch, and 1d is a normal yarn 40D × 34F warp yarns, 146 yarns / inch. 1c is ordinary thread 40D
A single layer of a plain weave base cloth of 148 weft yarns / inch at 34F was combined into a single layer to form a seamless ribbon. Even when a so-called ironing process for flattening with heat and pressure in the state of the base fabric was performed, the thickness of the ink ribbon 1 was only 0.140 to 0.145 mm.

The number of shots is 146 × 148 and 14
The crimp rate was 6 × 148 and the crimp rate was about 5%.

Consider printing durability. In the two-layer ink ribbon 1, the outer ink ribbon 1 (hammer 3 side)
Receives the impact of the hammer 3 repeatedly. On the other hand, the ink ribbon 1 inside the two-layered ink ribbon 1 (on the side of the recording paper 2) receives the recording paper 2 while receiving the applied pressure.
Is crushed.

Particularly, in the case of rough paper, the thread of the ink ribbon 1 is greatly damaged due to the sharpness and high hardness included, and the fabric life is extremely shortened. Printing was performed on inferior paper with the two-layered ink ribbon 1, and a printing durability test was performed to check the life of the fabric.

The cut portion of the ink ribbon 1 was generated from the recording paper side and was not seen from the hammer 3 side.

Even when printing on inferior paper, there was no cut in the fabric, and up to 4.5 million characters were printed. I can no longer do it.

Further, as the durability increases, the yarn shrinks due to repeated impact force, and the yarn itself becomes thicker due to the printing impact force, so that the thickness of the cloth increases. It also increased from 0.030 to 0.050 mm.

As a result, the running resistance applied to the pressure adjusting spring 9 of the ribbon cartridge increased, and the phenomenon that the ribbon cartridge itself came off the printer was observed. This phenomenon is seen gradually from the endurance frequency of 1.5 million characters.
Almost occurred in 500,000 characters. Some measures are needed to put it into practical use.

When 0.4 g of ink was initially injected into the ink cartridge into the wick 2 and the durability was evaluated, the ink life was confirmed up to 2.5 million characters.

[Comparative Example 2] The two-layer ink ribbon 1 of Comparative Example 2 has a length of ordinary yarn nylon 66 (polyamide 66), which is obtained by stacking two base fabrics and applying pressure to melt and cut off the ends with heat. It is a seamless ribbon of 300 mm in length.

In FIG. 2, 1d is ordinary yarn 30D × 26F.
188 yarns / inch warp yarns, 1c is a normal yarn 30D × 26F, one layer inside a 180 yarns / inch weft yarn, and 1d is a normal yarn 30D × 26F warp yarns, 188 yarns / inch. 1c is ordinary thread 30D
A single layer of the plain weave base fabric of the outer layer of weft yarns of 180 / inch at × 26F was combined into one layer to form a seamless ribbon. Even when a so-called ironing process for flattening with heat and pressure in the state of the base fabric was performed, the thickness of the ink ribbon 1 was only 0.130 to 0.135 mm.

The number of shots is 188 × 180 and 18
The crimp ratio was about 15% with 8 pieces × 180 pieces.

Consider printing durability. In the two-layer ink ribbon 1, the outer ink ribbon 1 (hammer 3 side)
Receives the impact of the hammer 3 repeatedly. On the other hand, the ink ribbon 1 inside the two-layered ink ribbon 1 (on the side of the recording paper 2) receives the recording paper 2 while receiving the applied pressure.
Is crushed.

Particularly, in the case of rough paper, the thread of the ink ribbon 1 is greatly damaged and the fabric life is extremely shortened because of the sharpness and high hardness included. Printing was performed on inferior paper with the two-layered ink ribbon 1, and a printing durability test was performed to check the life of the fabric.

The cut portion of the ink ribbon 1 was viewed from the hammer 3 side.

Even if the printing durability is inferior on rough paper, the cut of the cloth is 1
Up to 800,000 characters, the characters could be read in four sharp copies. There was no fabric life up to 3 million characters for rough paper.

Further, as the durability increases, the yarn shrinks due to repeated impact force, and the yarn itself becomes thicker due to the printing impact force, so that the thickness of the cloth increases. Although it increased from 0.030 to 0.050 mm, no increase in running resistance or a phenomenon that the ribbon cartridge itself came off the printer was observed.

When 0.4 g of ink was first injected into the ink cartridge into the wick 2 and the durability was evaluated, it was confirmed that the ink life was up to 1.8 million characters, but the final ink life was unknown due to the material life.

[Conventional Example] Next, the characteristics of an ink ribbon having a one-layer structure, which is generally used in the past, were examined in the same manner.

This one-layer ink ribbon 1 is a seamless ribbon having a length of 300 mm, in which a base cloth made of ordinary yarn nylon 66 (polyamide 66) is overlaid and the ends are melted and cut off by applying heat while applying pressure.

In FIG. 3, one layer 1a is a weft, 1b is a warp, and a plain weave base fabric of 40D × 34F (the number of filaments) is used.
A plain weave base fabric of 8 / inch weft was used as a seamless ribbon. In the state of the base cloth, the thickness of the ink ribbon 1 is reduced to 0.
From 115 to 0.120 mm.

The number of shots was 148 × 146, and the crimp rate was about 7%.

The ink ribbon 1 is in contact with the transfer roller 5 on the surface of which the ink transmitted from one end of the wick 10 is applied, and the ink is supplied by this contact.

At this time, the rotation of the driving gear 6 for transmitting the driving torque of the printer causes the ink ribbon 1 to move between the recording paper 2 and the hammer 3 stored in the head 4.
Although not shown in the drawing, the hammer 3 having obtained the printing pressure by the excited coil hits the ink ribbon 1 and hits the recording paper 2. The ink is reflected on the recording paper 2 and printed during the hitting. At this time, the pressure of the hammer 3 is
Through the recording paper 2. The color is developed by the pressure of the hammer 3 from which the pressure-sensitive resin applied to the second and subsequent recording sheets 2 is transmitted.

Consider printing durability. The outside of the one-layer ink ribbon 1 receives the impact force of the hammer 3 repeatedly.
On the other hand, the inside of the ink ribbon 1 (on the side of the recording paper 2) is pressed against the recording paper 2 while receiving the applied pressure.

Particularly, in the case of rough paper, the thread of the ink ribbon 1 is greatly damaged due to the sharpness and high hardness included, and the fabric life is extremely shortened. Printing was performed on rough paper with the one-layer ink ribbon 1, and a printing durability test was performed to check the life of the fabric.

The cut portions of the ink ribbon 1 occurred from the recording paper side and the hammer 3 side. It seems that the cutting was accelerated by being cut on the inside and caught by the hammer 3 on the outside.

Even when printing was performed on inferior paper, the fabric was not cut off, and up to 300,000 characters were printed. However, the wear of the inner ink ribbon gradually progressed from the time when 500,000 characters were printed.

Further, as the durability increased, the yarn contracted due to the repeated impact force, and the yarn itself was deformed flat and showed the same fabric pain as the cut state of the one-layer ink ribbon.

At the same time, three clear copies were confirmed.
As a precautionary measure, when the drive gear 5 of the ink cartridge was measured with a torque measuring device, the result was 40 g, which was almost the same as the initial torque.

When 0.4 g of ink was initially injected into the ink cartridge into the wick 2 and the durability was evaluated, the ink life was confirmed up to 500,000 characters. However, the life expectancy of the fabric situation could not reach the target of 2 million characters.

Table 1 summarizes the above characteristic investigations.

As is evident from Table 1, the ink ribbon configuration of the present invention is the best to satisfy both the copying property and the long life of the fabric on poor quality paper. Further, the following has become clear.

1) Long life (abrasion resistance) of the ink ribbon: Basically, the two-layer structure has the following advantages.

The action of the fibers being directly crushed by the pressure of the hammer is alleviated by the two ribbons.

The shortening of life, which can be called a repetitive polishing action by contacting rough paper, can be specialized for the inner ink ribbon and can be dispersed on the outer side of the crushing action. In addition, the hammer impact force is reduced to about 1/2 by receiving two sheets.

While the tension for moving the ink ribbon is applied, repeated hammer damage shortens the fabric life at an accelerated rate. However, in the two-layer ink ribbon, the tension is reduced by half, and the life shortening speed is reduced.

When a seamless ribbon is produced by thermal cutting, the internal stress of the fabric due to uneven cutting (twist) may remain. After printing for a long time, the fabric shrinks to a "wakame" state. At this time, the deformation of the fabric due to the internal stress becomes apparent, and the phenomenon occurs such as the contact of the hammer and the rubbing of the printing paper, which shortens the life of the fabric. However, in the two-layer ink ribbon, the influence of the internal stress is mutually complemented by two sheets, and the short life is suppressed.

2) Copyability (impact transmission) of the ink ribbon: The printing energy is determined by the design of the printer, and the problem is how to transmit the power to the copy paper without reducing it. As a solution, reduce the thickness of the ink ribbon.

The ink ribbon is made hard, that is, has a high density.

In the first and second embodiments, the thickness is reduced to a predetermined range or less by flattening with an iron. However, if the printing apparatus is large and the driving force of the hammer is large, In some cases, this processing is unnecessary, but the effect of the two layers can be similarly obtained.

[0099]

[Table 1]

[0100]

According to the above construction, since the outer ink ribbon pressed by the printing means passes through the inner ink ribbon, the inner ink ribbon functions as a damper.
Fiber crushing due to pressure or impact of the ink ribbon on the printing means side is small, and the life of the ink ribbon can be extended.

Further, since the material of the ink ribbon on the recording paper side is deformed by the printing means less and is only worn by sliding on the recording paper, the life of the ink ribbon can be extended.

Further, since the tension of the ink ribbon is applied to the two fabrics, the stress acting on each fabric is reduced, so that the fabric life can be extended.

Furthermore, since the amount of ink impregnated in the ink ribbon is increased, the difference in print density between the printing start side and the printing end side of the same line to be printed is reduced, and the printing quality is greatly improved. effective.

[Brief description of the drawings]

FIG. 1 is a plan view of an ink cartridge of the present invention, which houses an ink ribbon of the present invention, with an upper cover opened.

FIG. 2A is a sectional view of an ink ribbon showing an embodiment of the present invention. FIG. 2B is an overall schematic view of the ink ribbon.

FIG. 3 is an enlarged cross-sectional view of the ink ribbon of the present invention.

FIG. 4 is an enlarged cross-sectional view of another embodiment of the ink ribbon of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ink ribbon 1a Printing paper side weft 1b Printing paper side warp 1c Hammer side weft 1d Hammer side warp 2 Recording paper 3 Hammer of printing device 4 Head of printing device 5 Transfer roller 6 Drive gear 7 Lower case of ink ribbon cassette 9 Ink storage body 10 Wick

Claims (5)

[Claims] An ink ribbon used in a printing apparatus for transferring ink to a recording medium by the impact or pressure of a printing means via an ink ribbon.
An ink ribbon comprising a plurality of sheets stacked on each other, and using a yarn having good abrasion resistance as a base cloth on a recording medium side. 2. The ink ribbon according to claim 1, wherein a high tension yarn having a breaking strength of 7 gf / D or more is disposed on one or both of the warp and the weft on the recording medium side. 3. The thread of the base cloth on the side of the recording medium is 40D34F.
Or 30D26F is arranged.
The ink ribbon as described. 4. The ink ribbon according to claim 1, wherein the crimp rate of the yarn used for the base cloth is smaller by 2% to 5% on the recording medium side. 5. An ink ribbon cartridge for use in a printing apparatus for transferring ink to a recording medium by an impact or a pressure of a printing means via an ink ribbon, wherein the base cloth of the ink ribbon is overlapped with two sheets having different characteristics. An ink ribbon cartridge characterized in that a base cloth is formed on the side of the base using a thread having good abrasion resistance.