US2006542A - Textile fabric - Google Patents

Description

Patented Juty 2, 1935 attests rsxrna mean Henry Dreyfus, London, England No Drawing. Application April 15, 1930, Serial No. 444,619. In Great Britain April 29, 1929 12 (Claims. (Cl. 117-52) This invention relates to the production of textile fabrics, and more particularly woven fabr1cs.

The object of the invention is to simplify or improve the production of crepe-like or figured or pebbled effects in woven fabrics.

The method of producing crepe fabrics as ordinarily practised consists in employing as weft or both weft and warp two kinds of thread, each highly twisted, the twist of one being in the opposite direction to that of the other. These two threads alternate with each other in the fabric the usual arrangements being either one thread of one kind alternating with a thread of the other kind, or an alternation of pairs of like threads, and in either of these arrangements, each weft thread is contained in a separate shed. After the fabric is woven, it is subjected to shrinking, and the consequent contraction of the high twist threads produces the crepe effect required.

According to the present invention,-crpe or like effects are produced by the use of a composite thread consisting solely of two threads, at least one of which is highly twisted. Preferably both are highly twisted, but in opposite directions. The high twist threads may be doubled with low twist threads before their association into the composite threads.

For use as weft, the two threads may be simply parallel wound on to a weft pirn or other weft package as is claimed in divisional application No. 709,331 filed Feb. 1, 1934. They may be sized together before winding, if desired as is claimed in divisional application No. 603,676 which issued on Feb. 20, 1934 as Patent No. 1,947,465. The two threads may be doubled together, this form of composite thread being capable of use both as a weft and as a warp thread.

A preferred form of composite thread, capable of use both as weft and warp, consists of two threads highly twisted in opposite directions, and doubled together. The doubling should be light in comparison with the degree of twist imparted to each thread.

The invention may be used for the production of crepe-like effects in all kinds of materials. Thus, the component threads may consist of filaments of cellulose acetate or other organic derivatives of cellulose, which materials do' not give good crepe effects by the normal methods employed. Likewise, threads of natural silk,

cotton, wool, or artificial silk of the reconstituted cellulose type may be used, the crepe effect being evident immediately on weaving the fabric. If

desired, shrinking may be resorted to to en hance the crping of the fabric. v

The component threads in the composite threads may be of like or unlike counts or denier. colour, or composition. Thus, for example, a composite thread may consist of one thread of cellulose acetate, and one thread of natural silk, cotton, or wool.

By the use of composite threads according to the invention, it is not necessary to employ a multi-box loom in order to produce the crepe-like effects, since the effect produced does not depend on the use of two kinds of weft thread. It is, however, within the scope of the invention to use two kinds of composite thread, of the same or dif- 1 ferent composition, one thread being doubled in the opposite direction to the other, in which case, a two-box loom is necessary for the weaving of the fabric. Again, shrinking of the fabric may be resorted to, particularly when the fabrics consist of or contain materials which are normally subjected to shrinking in ordinary crping processes.

The following are given as examples of composite threads which are particularly suitable for producing crepe effects in fabrics of cellulose acetate, but it is to be understood that the invention is not in any way limited thereby.

Example I A composite thread is formed from two 75 denier threads of cellulose acetate, one having 55 turns per inch of left-hand twist and the other 55 turns per inch of right-hand twist. The two threads are doubled together with 10-12 turns per inch in either direction.

Example II A composite thread consisting of a 100 denier thread of cellulose acetate having 60 turns per inch of right-hand twist and a 70 denier cellulose acetate thread having 40 turns per inch of lefthand twist, the two threads being doubled together with 20 turns per inch of left-hand twist.

This thread may be used alone in a single-box loom, or in a two-box loom alternately with another composite thread consisting of a 100 denier cellulose acetate thread having 60 turns per inch of left-hand twist and a '70 denier cellulose acetate thread having 40 turns per inch of righthand, twist, doubled together with 20 turns per inch of right-hand twist.

The threads described in the above examples may be used as weft or warp alone or as both warp and weft to give excellent crepe-like effects. Where the oppositely twisted threads of the secnd example are used, it is convenient to insert two picks of one thread alternately with two picks of the other thread.

What I claim and desire to secure by Letters Patent is:

1. As a new article of manufacture, a textile fabric formed of crepe thread which is made up of two tightly twisted strands of multi-fibres, one of said strands being more tightly twisted and in a direction reverse to the other strand, and said two strands being combined into a single thread by a light twisting together in a direction reverse to said more tightly twisted strand so as to neutralize the twist-distorting action of the several strands in the textile fabric formed thereof.

2. A crepe thread made up of a strand of tightly twisted multi-fibres and a strand of slightly tighter reversely twisted multi-fibres said strands being combined by a loose twisting together in a direction reverse to said tighter twisted strand whereby a single thread is formed free of the twist-distorting action of the several strands.

3. A crpe thread which is made up of two tightly twisted strands of multi-fibres, one of said strands being more tightly twisted and in a direction reverse to the other strand and said two strands being combined into a. single thread by a light twisting together in a direction reverse to said more tightly twisted strand so as to neutralize the twist-distorting action of the several strands.

4. A crepe thread composed of a thread having about 60 turns per inch of right hand twist and a thread having about 40 turns per inch of left hand twist, the two threads being doubled together with about 20 turns per inch of left hand twist.

5. A crepe thread composed of a multi-filament thread having about 60 turns per inch of right hand twist and a thread having about 40 turns per inch of left hand twist, the two threads being doubled together with about 20 turns per inch of left hand twist.

6. Textile fabric containing a crepe thread composed of a thread having about 60 turns per inch of right hand twist and a thread having about 40 turns per inch of left hand twist, the two threads being doubled together with about 20 turns per inch of left hand twist.

7. Textile fabric containing a crepe thread composed of a multi-filament thread having about 60 turns per inch of right hand twist and a thread having about 40 turns per inch of left hand twist, the two threads being doubled together with about 20 turns per inch of left hand twist.

8. A crpe thread composed of thread having about 60 turns per inch of twist in one direction and a thread having about 40 turns per'inch of twist in the other direction, the two threads being doubled together with about 20 turns per inch of twist in the direction of the thread having 40 turns per inch of twist.

9. Textile fabric containing a crepe thread composed of a thread having about 60 turns per inch of twist in one direction and a thread having about turns per inch of twist in the other direction, the two threads being doubled together with about 20 turns per inch of twist in the direction of the thread having 40 turns per inch of twist.

10. A composite thread for use in the production of fabrics having crepe-like or pebbled effects, said thread consisting solely of two strands twisted in opposite directions to different degrees and each to a high degree and lightly doubled together, the degree of twist and the degree and direction of doubling being such that the final twist in each component strand is at least 40 turns per inch. I

11. A composite thread for use in the production of fabrics having crepe-like or pebbled effects, said thread consisting solely of two cellulose derivative strands twisted in opposite directions to different degrees and each to a high degree and lightly doubled together, the degree of twist and the degree and direction of doubling being such that the final twist in each component strand is at least 40 turns per inch.

12. A composite thread for use in the production of fabrics having crepe-like or pebbled effects, said thread consisting solely of two cellulose acetate strands twisted in opposite directions to dif-' ferent .degrees and each to a high degree and lightly doubled together, the degree of twist and the degree and direction of doubling being such that the final twist in each component strand is at least 40 turns per inch.

. HENRY DREYFUS.