Textiles: weaving – Miscellaneous – Loom cleaning
Reexamination Certificate
1999-07-01
2001-06-19
Calvert, John J. (Department: 3741)
Textiles: weaving
Miscellaneous
Loom cleaning
C139S38300A, C139S42000D, C139S035000, C139S059000
Reexamination Certificate
active
06247502
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a method of weaving a multi-colored web. Also, the invention relates to a multi-colored web, woven by means of the method, which relates to this web. Also, the invention relates to a warp thread assembly, designed for said method and said multi-colored web respectively, according to the first claim, which relates to such an assembly.
BACKGROUND OF THE INVENTION
A web or weaved fabric comprises, as is well known, longitudinal warp threads and transversal weft threads. The warp threads preferably are continuous in order to be able to carry out the weaving in a continuous fashion on a jaquard-loom.
In order to obtain varying colors and patterns respectively in a fabric so far a certain combination of warp and/or weft threads, colored in various ways, has been put together in a way, that is time-consuming, complicated and results in extra costs. During the entire warp length this putting together has then been restricted to said combination and the pattern obtained thereby. A normal warp length is
500-2000
m. The colors and the patterns respectively then were visible through the color positions in the warp and the weft respectively and through the bonding patterns. This has resulted in, that during the weaving it has not been possible to change a certain patterned product more than at the most to a very insignificant extent.
In order to, in a weaved web, obtain many colors in a refined way it is necessary to weave in several web layers by means of so called double weaving, which is a technique, which results in a thick weave, which it is only possible to produce in a slow way. Also, it is necessary to weave large amounts of each pattern and color position of the pattern. The double weaving is used e.g. when it is desirble to conceal a colored thread on the rear side of the web in order to make it invisible on the front side.
EP-A1-0 692 562 relates to a method of simulating the true appearance of a web on a computer display device without first having to weave it. Considering the dynamic condition and behaviour of the warp and weft threads the already measured behavior of these threads can be corrected. A web pattern can also, according to this document, be detected and fed into data equipment and be shown on a display device respectively. The various threads can of course have different chosen colors. However, the drawbacks and deficiences mentioned above exist also in a product according to this document.
DE-A1-4 438 535 also starts from a fictitious pattern, which is divided into screen dots from three basic colors as well as black and white, each screen dot having at least the size of a weavable point. The web is then woven according to the jaquard process, various colors being obtained by combining various adjacent weaveable joints from said colors. This document starts with the additive color mixing, which is used in e.g. the printing field. This document does not mention, which threads are considered, e.g. no distinction is made between warp and weft threads and also, there is no assumption of any regularity whatsoever. Consequently, the practical weaving according to the suggested method seems to relate to just one already determined product, in which purely summarily savings can be made by limiting the number of starting colors. When a new product is to be produced, it appears to be inevitable to start from the beginning with anew arrangement of all the conditions. This method apparently is useful only for double weaving, in which the threads are concealed on the rear side. Thus, this method is also impaired by the already described drawbacks and deficiences.
Finally, U.S. Pat. No. 1,096,702 relates to a method of applying various colored warp threads with a minimal waste on a warp beam. The color arrangement is determined by the individual pattern, which is to be weaved, and has to be changed, when another pattern is to be used. Thus, also in this case the already described drawbacks and deficiences remain.
SUMMARY OF THE INVENTION
One object of the present invention is to counteract and as far as possible eliminate the above-mentioned problems and drawbacks. More particularity, it must be possible to retain the warp thread arrangement during the entire warp length and thereby achieve maximal variation possibilities as to colors, patterns and shapes in the web arrangement. Also, it must be possible to produce a short series of a certain product and a certain pattern respectively without having to change or modify the warp arrangement. In addition to these objects it must be possible to adjust, in an easier, quicker, simpler and more economic way, a new weaving technique to computer control techniques and in this way using these techniques to obtain almost arbitrary, preprogrammed variations as to colors, patterns and shapes respectively using the same warp thread arrangement.
These objects are attained by using a method of the type described in the introduction, in the way that is set forth in below invention. Said objects are also attained by using a multi-colored web, which defines such a web. Finally, said objects are also attained by using a warp thread arrangement which defines such an arrangement.
REFERENCES:
patent: 1096702 (1914-05-01), Fleischer
patent: 3434510 (1969-03-01), Neyret
patent: 4197345 (1980-04-01), Worrall
patent: 4438535 (1996-05-01), None
patent: 0692562 (1996-01-01), None
Oelsner, A Handbook of Weaves, The Macmillan Co., 1915, pp. 350-351.
Calvert John J.
Davis & Bujold P.L.L.C.
Linnevaveriet I Horred AB
Muromoto Jr. Robert H.
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