GB512070A - Improvements in the weaving of pile fabrics - Google Patents

Abstract

512,070. Pile fabrics. ISSUM, H. VAN, ROAN, (formerly ROSENMANN), H. M., and VERSPAGEN, J. March 7, 1938, Nos. 7112 and 13318. [Classes 142 (ii) and 142 (iv)] In weaving two loop pile fabrics 4, 5, Fig. 4, face to face in a double shuttle loom with temporary or blind warps 13 and temporary wefts 26, 27, the pile warp 17, 18 is positively drawn off and when the pile warp 18 of the lower fabric is raised above the blind warp, a weft 26 is inserted beneath it by the upper shuttle and simultaneously the lower shuttle inserts a weft 24 into the lower fabric, similarly a weft 27 is inserted below the pile warp 17 by the lower shuttle whilst the upper shuttle is inserting a weft in the upper fabric. The blind warp is not shed and may be stationary or be positively let off as weaving proceeds and be severed afterwards so that the two fabrics may separate or the pile supporting wefts may be withdrawn first and the blind warp reeled for re-use. The, fabrics may have loop pile of varying heights, or cut and uncut pile as shown in Fig. 2, or both as shown in Fig. 8. The cut pile may be formed by threads 35, 36 of different colours &c. drawn from cheeses on a creel 37 and controlled by jacquard operated healds 38, 39 so as to be woven into the fabric 5 and to pass into the fabric 4 at intervals. The uncut loops are formed by pile warps 19, 20 supplied by a beam 21, positively let off at 21' and controlled by healds 22, 22<1>. A travelling blind warp 31 of cotton &c. from a beam 32 is positively fed at 33 and held in a middle position by a stationary heald 15. Ground warp threads 2, 3, 8, 9 are supplied from beams 1, 10 and controlled by healds 6, 7, 11, 12. The fabrics are correctly spaced apart by adjusting dividing rollers 8, and also adjusting the ground warp healds. Threads 40 from the creel are controlled by the heald 41 and are woven into the fabric 4 so that this may have the same structure as the fabric 5. The blind and pile warps are severed by a knife 43. In weaving fabrics with pile loops of varying heights the pile warps 50, 53 for the two fabrics are controlled by positive let off motions 52, 55 under jacquard or dobby control, one letting off a short length while the other lets off a long length or vise versa but the total let off by both being constant. The cloth covered measuring roller 66 of each let off motion has a gear wheel with which driven pinions 67, 68, 77 of various sizes are caused to mesh by moving frames 69 and 76. These are controlled by cords 71, 72, 78, 79 and springs connected to jacquard or dobby hooks. A modification - is described wherein pile warp threads forming both cut and uncut pile are used. The blind warp may be of cotton &c. or of wire. Each fabric may have two pile warps used alternately to form loop pile. The fabrics may be used for moquettes, tapestry, table cloths &c. According to the first Provisional Specification, the surplus wefts may be withdrawn by conical rollers.