METHOD OF WEAVING A MULTI-COLORED WEB, WEB PRODUCED ACCORDING TO THIS METHOD AND WARP ASSEMBLY THEREFOR

Abstract: The present invention relates to a method of weaving a multi-colored web (5; 6; 7) with various colored warp threads (1, 2, 3) and weft threads (4). According to the invention warp threads having preferably three different colors, namely blue, red and yellow, are used, in regular series adjacent to each other. One of these colors is emphasized locally by the corresponding admixture into the front side of the web, which is being woven, in order to strengthen this shade. By the corresponding admixture of two or more colors new shades are obtained. The invention also relates to a multi-colored web (5; 6; 7), produced according to this method as well as to a warp thread arrangement (1, 2, 3), used in or for said method and web respectively.

Description: METHOD OF WEAVING A MULTI-COLORED WEB, WEB PRODUCED ACCORDING TO THIS METHOD AND WARP ASSEMBLY HEREFORE The present invention relates to a method of weaving a multi-colored web according to the preamble of patent claim 1. Also, the invention relates to a multi-colored web, woven by means of the method according to claim 1, according to the first claim , 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. 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 indignificant 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 i.a. 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-Al-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 behaviour of these threads can be corrected. A web pattern can also, according to this document, be detected and fed into a data equipment and be shown on a display device respectively. The various threads can of course have different chosen colors. However, the drawbacks and defici- ences mentioned above exist also in a product according to this document. DE-Al-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 weable joints from said colors. This document starts with the additive color mixing, which is used in i.a. the printing field. This document does not mention , which threads are considered, i.e. 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 a new arrangement of all the conditions. This method apparently is useful only for double weaving, in which the threads are concealed on the rear side. Th s, this method is also impaired by the already described drawbacks and deficiences. Finally, US-A-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 . One object of the present invention is to counteract and as far as possible eliminate the above-mentioned problems and drawbacks. More particularily , 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 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 the characterizing clause of patent claim 1. Said objects are also attained by using a multi-colored web, designed as set forth in the first claim, which defines such a web. Finally, said objects are also attained by using a warp thread arrangement according to the first patent claim, which defines such an arrangement. Additional characterizing features and advantages of the invention are mentioned in the following desription, reference being made to the enclosed drawings, which depict a few preferred , but not limiting, embodiments of the invention. The drawings show in detail : Fig. 1 a section of av first web according to the invention in a view from above and with an enlarged part in a perspective view ; Fig. 2 a corresponding section of a second web according to the invention in a view from above and with an enlarged part in a perspective view, using the same or identical warp thread arrangement as the one shown in Fig. 1 ; and Fig. 3 a corresponding section of a third web according to the invention in a view from above and with an enlarged part in a perspective view, using the same or identical warp thread arrangement as the one shown in Fig. 1. The basic idea of the present invention is to design the warp in such a way, that different colors and color combinations can be emphasized in effect anywhere in a web or fabric, which is to be woven. This is rendered possible by using warp threads with different colors, the colors of which are repeated at least substantially with regularity. A blue warp thread 1, a red warp threads2 and a yellow warp thread 3, placed adjacent to each other and followed in series by the same colors, preferably are to be used. Of course, the sequence can vary. Also, two or indeed three warp threads having the same color can be placed adjacent to each other, which then are followed by two or three warp threads having the second and finally two or three warp threads having the third color. It is also possible to mix one or several, preferably evenly distributed warp threads into a fourth color, e.g. a monochrome color between white and black and/or green. The weft or weft threads 4 can have an arbitrary color, e.g. a monochrome color between white and black. Since these relatively few but among themselves strongly varying colors are available close to each other and consequently in effect everywhere in the longitudinal as well as the transversal direction of the fabric, which is being woven, it is possible in the bindings to emphasize or suppress a certain color or two certain colors and also by combining two or possibly three colors to obtain new color effects. II- lustrations of these possibilities are shown in the drawings, in which blue warp treads 1 are followed by red warp threads 2 and yellow warp threads 3. This color sequence is then repeated along the transversal direction of the entire warp. In fabric 5, obtained according to Fig. 1, blue warp threads 1 are emphasized up to 77.8 % in 56 overlappings , red warp threads 2 up to 11.1 % in 8 overlappings and yellow warp threads 3 up to 11.1 % in 8 overlappings. Thus, the blue color is emphasized maximally within the shown section and the two other colors minimally. In fabric 6, obtained according to Fig. 2, blue warp threads 1 are emphasized up to 53.8 % in 56 overlappings, red warp threads 2 up to 38.5 % in 40 overlappings and yellow warp threads 3 up to 7.7 % in 8 overlappings. Thus, the blue color is emphasized maximally within the shown section, the red color in a somewhat more than medium strong way and the yellow color minimally. In fabric 7, obtained according to Fig. 3, blue warp threads 1 are emphasized up to 33.3 % in 32 overlappings, red warp threads 2 up to 58.4 % in 56 overlappings och yellow warp threads 3 up to 8.3 % in 8 overlappings. The blue color is in this case emphasized in a medium strong way, the red color maximally and the yellow color minimally. In all these cases weft 4 has one color, i.e. is white or is light-colored, which results in clear and bright colors in the woven fabric. If darker shades are desired, a darker weft is chosen and possibly a dark warp thread between or in the described and shown warp thread series. In contrast to the warp it is easy to change the weft and in a preprogram- mable way. Thus, the warp color, which is to be emphasized, can be made stronger or modified by means of a desirable weft color. All shades can be made stronger by means of two or three weft colors. Since a normal loom construction can hold 8-16 or actually more weft colors, it is easy to put together a very large number of color combinations jointly with the warp color and warp colors respectively. By binding the weft to substantially the same color as the respective warp thread, the color will be stronger. The few bindings, which possibly have to be carried out, to other warp thread colors, are carried out with the color, which to the least degree will influence the desired shade. For example, in order to emphasize a red color a yellow color is chosen rather than a blue color, which would have a greater influence. If a maximal white ground color is desired, it is advantageous to have one or two neutral, e.g. white, threads in the warp. More extreme colors, which hardly can be mixed, e.g. turquoise against green and fluorescent colors, suitably are to be added through the weft. The bindning of the treads to obtain various shades can be done by means of a plurality of more or less known binding techniques. It is important to make the interweaving regular in order to obtain a woven material having a smooth surface. By using these binding techniques a woven material can be given desired colors, color combinations and color shades but also other desired characteristics, such as structure, softness, wear resistance etc. The invention is not limited to the embodiments described above and shown in the drawings, which are to be regarded solely as exemplifications, which can be modified and supplemented in an arbitrary manner within the scope of the inventive idea and the following patent claims.

Claims: CLAIMS : 1. A method of weaving a multi-colored web (5; 6; 7) , using various colored warp threads (1,2,3) and weft threads (4), color mixing effects being achieved, c h a r a c t e r i z e d in that warp threads having at least three or more different colors are used, which are arranged in a regular way in series adjacent to each other, in that one of these colors is used locally by a corresponding quanta- tive admixture into the front side of the web, which is being weaved, in order to emphasize this shade , and in that in other places two or more colors are used , mixed in order to obtain new shades. 2. A method according to claim 1, c h a r a c t e r i z e in that as color series one or two blue warp threads (1), one or two red warp threads (2) and one or two yellow warp threads (3) are used, possibly with an admixture of additionally one or two warp thread colors, e.g. one or two having a monochrome color between white and black. 3. A multi-colored web (5; 6; 7) according to claim 1 or 2 , comprising various colored warp threads (1,2,3) and weft threads (4), c h a r a c t e r i z e d in that the warp threads have at least three different colors, which are arranged in a regular way in series adjacent to each other, in that one of these colors is emphasized locally by a corresponding admixture into the front side of the woven web in order to strengthen this shade, and in that in other places two or more colors are mixed in order to obtain new shades. 4. A warp thread arrangement (1,2,3), used in or designed to be used in a method according to claim 1 or 2 and a multi-colored web (5; 6; 7) according to claim 3 respectively, c h a r a c t e r i z e d in that the warp threads (1,2,3) have at least three different colors, which are arranged in a regular way in series adjacent to each other.

Inventors: EKELUND CHRISTER, EKELUND, CHRISTER
Applicants: EKELUND CHRISTER, LINNEVAEVERIET I HORRED AB, EKELUND, CHRISTER
Application year: 1998
Main classification: D03C19
IPC codes: D03C19