Patent GB-1369765-A (GB)
Title: Tentering machine for textiles
IPC: D06C3/00
Filed: 1973-01-09
Abstract: 1369765 Tentering fabrics BRUCKNER-TROCKENTECHNIK KG 9 Jan 1973 [24 Feb 1972 27 July 1972] 1203/73 Heading D1S A tentering machine comprises a driven feed roller 4 for a fabric 1 disposed above and laterally across pin chains 5 to receive and support a fabric passing from means 16 for spreading or uncurling the fabric edges, two driven pinning rollers 7 for applying the fabric edges onto the chains 5, and a device 23 for sensing the fabric edges to adjust the lateral spacing of the chains 5 to the width of the incoming fabric 1. In one embodiment, Fig. 1, the fabric 1 passes over a roller 24, a spreader roller 25, a pivotally mounted deflector roller 26 and over a spreader roller 25a. The fabric edges pass around uncurling fingers 16 between which are disposed adjustable guide bars 17 and which are held by supports 18 slidable along bars 19. The supports 18 each have a dog 22 connected to the upper guide rails 6 for the pin chains 5. The fingers 16 and the rollers 4, 7 are closely spaced. The feed roller 4 may comprise individual sections separately drivable and adjustable. Each roller 7 is driven by a roller 9 held by a bearing plate 10 and fixed to lower guide rails 6. Each roller 7 is supported by a bearing block 11 fixed to the upper rails 6 and is urged by a spring 13 against the roller 9 which is driven by an adjustable gearing 15 from a shaft 14. The device 23 includes feelers which detect the fabric edges optically, electrically or pneumatically and adjust the -width setting of the rails 6 having rollers 20 running on tracks 21. Adjustment of the rails 6 causes simultaneous adjustment of the rollers 7, 9 and the fingers 16. In a modification (not shown), the roller 9 is replaced by an endless driven belt. In a second embodiment, Fig. 2, the uncurling fingers 16' and the pinning rollers 7' are again adjusted simultaneously with the chain guide rails 6'. The drive for the roller 9', which frictionally engages each roller 7', and the roller 7' are mounted on a bearing plate 30 mounted on a carriage 31 slidable longitudinally on a bar 32 fixed to the upper rail 6'. A spring 36 urges the roller 7' and its plate 30 towards the roller 4' so that a roller 34 on the plate 30 is always pressed against a bar 35. In another embodiment, Fig. 3, the pinning rollers 7" are driven by the roller 4" or the two outermost sections thereof. Each roller 7" engages a freely rotatable roller 49 and is suspended from a lever 37 carried by a member 6"a adjustable with the corresponding rail 6". The rails 6" are adjustable by rollers 38 running on rails 39. The fabric is supplied by a feed roller 43 which may comprise individual sections separately drivable and passes over spreading rollers 41 and a roller 42. An uncurling finger 16a" smaller than the fingers 16" may be provided adjacent the roller 4". The fingers 16", 16"a and adjustable guide bars 17" are mounted on supports 44 adjustable widthwise by a spindle 45. Rough adjustment of the fingers 16", 16"a is effected by a mechanical feeler 47. A switch (not shown) is provided to switch off the drive for the spindle 45 to prevent the fingers 16, 16"a colliding.