GB1349184A - Circular loom - Google Patents

Abstract

1349184 Circular looms GEORG FISCHER AG BRUGG 19 April 1971 [10 March 1970] 23003/71 Heading D1E Circular looms. A circular loom has two groups of warp threads, the first of which 15 is issued from individual yarn magazines 14 arranged in a circle and the second of which 13 is fed between the magazines 14, and the weft 23, 24 is inserted by rotating inserters 20, 21 which push the second group of warps to the sides of the magazines and guide the weft 23 down and around the magazines, so that it is laid inbetween the two groups of warps, alternately from one side then from the other of the warp. The weft inserters 20, 21 consist of helical tubes which extend around the magazines and through which the weft passes, and which are spaced around the loom on a rotating ring 17 and a disc 16. The wefts are beaten up by a device, Fig. 13 having dents 29 resiliently attached to a ring 28, which dents are pushed outwardly to pass between the warps by a wheel 34 on a arm 33 rotating just behind the weft inserter. Both sets of warps may be fed vertically downward, Fig. 10, or they may be fed radially inward, (Fig. 15, not shown) to increase the warp density. The magazines may be supported purely by the weft inserters which are spaced so that each magazine has at least three inserter tubes passing around it (Fig. 9, not shown) or magnetic supporting means may be provided (Fig. 5, not shown). The inner weft inserters 20 may be supplied with yarn from bobbins arranged on a central spindle 26 of the loom. Multiple fabric looms. In an alternative embodiment, Fig. 19, magazines 14 are spaced in groups 60, 61 around the circumference of the loom and corresponding groups of magazines 62, 63 or warp beams are arranged above them to supply the second group of warps. Weft yarn is supplied from bobbins 64, 65 above the second group of warp supply means and inserted by first and second inserters 68 and 69 which rotate in opposite directions around the loom on the inside 68 and outside 69 of the loom respectively. Guide rails 72, 73 around the second group of warp supply means guide the weft so that the inserter 68 first carries the weft in one direction to the gap 80 between the fabrics where the weft slips out of it and is picked up by the second inserter 69 which carries it in the opposite direction so that the weft traverses continuously from side to side of the fabric. Tensioning warps. The second group of warps may be supplied from magazines 38, Fig. 17 which are mounted on members 40 slidable radially of the loom and biassed in the outward direction and which are acted upon by a wheel 42 rotating radially in line with a weft inserter. The wheel pushes the members 40 inwardly to slacken the corresponding warps as the inserter begins to engage them. Finishing fabrics. In one embodiment (Fig. 18, not shown) the finished fabric is brushed by combing cylinders (46, 47) as it leaves the weaving area to increase the warp density.