JPH04234688A - Impact resistant impressing fabric - Google Patents

Abstract

PURPOSE: To enhance impact resistance of a print cloth by containing a plurality of yarns being woven with 70 denier nylon yarn. CONSTITUTION: A plain woven fabric 10 comprises warps 12 and wefts 14. The warps 12 and wefts 14 are 70 denier nylon 66 and the fabric 10 has ink receiving power of about 13.6g per square yard. The fabric is cut into a ribbon of desired size by means of a hot knife or other desired slitter.

Description

[Detailed description of the invention]

0001

FIELD OF INDUSTRIAL APPLICATION This invention relates to an impression fabric used as a printing ribbon and having good printing quality, long printing life and resistance to printing damage.
It relates to woven fabrics called on fabrics.

0002

BACKGROUND OF THE INVENTION Conventionally, impression printing ribbons have a dense structure with each ribbon being a plain weave. Almost all applied fabrics are made from nylon 66 yarn, and a few from nylon 6, cotton, or silk. The standard application fabric configuration for spools and cartridges is made of 40 denier yarn in the warp and cross directions and is 4 mil thick with approximately 170 warp threads per inch and 115 weft threads per inch. It is a cloth of

Because of ribbon failure, there has been interest in developing more durable application fabrics. Some newer printers have high impact energies that cause significant ribbon breakage and ribbon-induced cartridge failure. Many new ribbon products, both spools and cartridges, are reinked to extend their useful printing life. Additional printing on the ribbon causes significant ribbon breakage. Often, the ribbon breaks before all available ink is depleted, resulting in inevitable cartridge failure.

[0004] Ribbon durability is addressed in the market in many ways. Number of warp threads ranges from 170/inch to 2
12 threads/inch, the number of weft threads increased from 115 threads/inch to 1
It has been increased to 20 lines/inch. This construction improves impact resistance, but not to the degree that the market requires. The addition of threads makes this structure more expensive to manufacture.

A 5 mil thick fabric with a 40 denier warp and a 70 denier weft has been used to improve durability. This construction is well known for use in wide ribbon printers and improves impact resistance, but not to the extent required by the market. Significant filament breakage occurs even for larger 70 denier wefts.

US Pat. No. 4,874,263 addresses this problem with a twill construction. At low construction (170 warp and 115 weft threads per inch), the fabric is unsuitable as an impression fabric because the warp threads will be torn apart by the printing traces. Higher construction (approximately 400 threads per square inch) improves ribbon durability, but there is a significant increase in cost.

[0007]

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a woven impression fabric with improved impact resistance and a print life and quality at least comparable to current commercial products. It is.

[0008]

Other objects and advantages of the present invention will become readily apparent as the present invention is described with reference to the accompanying drawings.

Referring to FIG. 1, a typical plain woven fabric 10 used in ribbons for typewriters, printers, etc. is shown. Fabric 10 is comprised of warp threads 12 and weft threads 14, as is well known in the trade, 67.
It is preferably woven on an air jet loom having a reed width of 26 inches.

The warp and weft yarns are 70 denier, 34 filament nylon 66, and the fabric is woven with 106 warp and weft yarns per inch. It is within the scope of this invention to vary the number of warp and/or weft threads by ±20 threads per inch. A preferred embodiment of the invention is that the warp threads are twisted and the weft threads are textured.
tured).

After the above preferred fabric is woven, the pH is 9.
Wash with sodium carbonate and nonionic detergent at a temperature of 0.180°F and pass through a dilute citric acid bath to mild acidity. The fabric 10 is then dried on a tender tenter. The resulting fabric is 2.2 mm per square yard.
It weighs 2 ounces and has a thickness of 5.0 mils. The final fabric has 120 weft/inch, 108 warp/inch, and an ink receptivity of 13.6 grams per square yard. Fabric 10 is cut into ribbons of the required size using a hot knife or other desired slitter.

Alternatively, cut the final cloth to an appropriate width,
It can be inked, then cut, and incorporated into printer ribbon cartridges, typewriter ribbon spools, etc., such as cartridge 16 shown in FIG. In making the printer cartridge, the ribbon is joined to itself by ultrasonic welding into an endless loop. FIG. 2 illustrates a ribbon 18 made as an endless loop and loaded into a cartridge 16 by conventional methods. 20 ultrasonic welding points
It is shown in an exaggerated form, which is also normal.

The application fabric disclosed herein has increased abrasion resistance and reduced physical damage during printing compared to commercially available inked application fabrics. At the same time, this new fabric maintains the print longevity and quality commonly found in commercial products.

Although preferred embodiments of the invention have been disclosed, it is intended that changes may be made without departing from the scope and spirit of the invention, and it is intended that the invention be limited only by the scope of the claims.

[Brief explanation of the drawing]

FIG. 1 shows a typical woven fabric used to make the applied ribbon of the present invention.

FIG. 2 shows a printer cartridge with a ribbon made from the fabric of the present invention.

[Explanation of symbols]

10... Typical plain woven fabric, 12... Warp, 14... Weft, 16
... Cartridge, 18... Ribbon, 20... Ultrasonic welding.

Claims (6)

[Claims] 1. An applied printing ribbon of woven fabric comprising a plurality of threads woven with 70 denier nylon 66 thread, inked and cut to appropriate widths. 2. The ribbon of claim 1, wherein the number of warp and weft threads per inch is substantially the same. 3. The ribbon according to claim 2, wherein the number of threads is 106±20. 4. The ribbon of claim 1, wherein the warp threads are twisted. 5. The ribbon of claim 1, wherein the weft threads are textured. 6. The ribbon of claim 1, wherein the warp threads are twisted and the weft threads are textured.