Stock material or miscellaneous articles – Web or sheet containing structurally defined element or... – Including interlaminar mechanical fastener
Patent
1991-11-26
1992-12-22
Bell, James J.
Stock material or miscellaneous articles
Web or sheet containing structurally defined element or...
Including interlaminar mechanical fastener
28104, 4002413, 428225, 428257, 428299, D03D 300
Patent
active
051733609
DESCRIPTION:
BRIEF SUMMARY
SCOPE OF TECHNOLOGY
This invention relates to a method of manufacturing a fabric for the inked ribbon used in the printers such as impact type serial dot and line printers.
BACKGROUND ART
For the inked ribbon used in the impact type printers, the conventional spool type is decreasing, and the cassette type having the inked ribbon in the form of a long tape folded and housed in a cassette has become the main. But, the inked ribbon of the cassette type had a shortcoming to produce print spots, or hot spots as generally called, at the folded parts of the ribbon. For the fabric of the inked ribbon, a cloth composed of warps having a twist of 100 T/m or more and wefts of a twist of 0 to 300 T/m has been used. That is, to reduce the processing cost, the so-called non-twisting is being realized with the twisting process omitted for the wefts and the original twist of 30 T/m or less of the material yarn utilized for weaving. But, here, if such non-twisting is applied to the warps, the hot spots are generally produced, and so the inked ribbon is applicable only to limited uses such as spool type having hot spots scarcely produced.
On the other hand, in Patent Publication No. SHO 61-24487, it is described to disturb the fiber orientation of the cloth for inked ribbon with a high pressure water stream in order to dissolve the reel marks and improve the absorption of ink, but nothing is described of the method of dissolving the hot spots with the twist of the warp reduced.
DISCLOSURE OF THE INVENTION
In order to resolve the foregoing problem., the fabric for inked ribbon of the present invention has the following composition.
The fabric for inked ribbon according to the present invention is composed of a cloth having multifilaments of a twist of 30 T/m or less used for the warp, and it is characterized in that the fiber orientation in said multifilament is disturbed through high pressure liquid treatment.
Also, the method of manufacturing the fabric for inked ribbon according to the present invention is characterized by treating a cloth composed of warps of multifilaments of a twist of 30 T/m or less with a flow of high pressure liquid.
BRIEF DESCRIPTION OF DRAWING
FIG. 1 shows the standard for evaluation of hot spots. That is the conditions of hot spots of various ranks of ribbons in solid printing.
BEST EMBODIMENT OF THE INVENTION
According to the present invention, there is provided a fabric for inked ribbon scarcely producing hot spots by treating a cloth composed of multifilaments of a low twist of warps with a high pressure liquid. The fabric for inked ribbon of the present invention has the orientation of fibers in the filaments disturbed by the high pressure liquid treatment and thus has the voids in the fabric increased, and so it is distinguished in absorption of ink. Against the warps having a high twist given by additional twisting, the effect of improving the hot spots is readily obtainable, and the ink absorption is increased.
When subjected to the high pressure liquid treatment, the fabric shrinks more or less, and here by taking such shrinkage into account and weaving to a rather low fiber density, it is possible to provide a product of a desired fiber density and thickness.
As the material for the multifilament under the present invention, there may be listed the polyamide fiber, polyester fiber, polyacryl fiber and polyvinyl fiber. But, form the durability of the fabric, the polyamide fiber and polyester fiber are preferable, and nylon 66 and nylon 6 are particularly preferable.
The fabric constituting the inked ribbon is composed of a cloth having the foregoing fiber used for the warp as well as weft. The total denier of these yarns is preferably 20 to 100D or, more preferably, 40 to 70D, and the single yarn denier of the fiber constituting the yarn is preferably 1 d to 3d.
The textile density of the fabric is preferably 150 to 20 yarns/in. for the warp and 100 to 140 yarns/in. for the weft but is not limited thereto.
For the texture of the fabric, plain weave, derivative plain weave, t
REFERENCES:
"Technological Innovation on Raw Fabric for Computer Ribbon Making", Asahi Chemical Industries Co., Ltd. Senken Newspaper, Mar. 19, 1988.
Hatakeda Tsuyoshi
Hiroe Nobutake
Kadota Toshiaki
Bell James J.
Toray Industries Inc.
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