Patent GB-1271413-A (GB)
Title: Improvements in edge strip applicator
IPC: B29C53/36
Filed: 1969-08-05
Abstract: 1,271,413. Binding edges of non-metallic sheet material. UNIROYAL Inc. 5 Aug., 1969 [12 Aug., 1968], No. 39142/69. Heading B5K. Apparatus for binding an edge " b " of strip material 2 comprises means for feeding the strip 2 in a given direction, a movable applicator for applying a binding ribbon 3b to the edge " b," a sensor (48), Figs. 7 and 8 (both not shown), for sensing the position of the edge " b," a movable folder 50b positioned adjacent the edge " b " for folding the ribbon 3b therearound, and means responsive to the sensor (48) and connected to the folder 50b and to the applicator for maintaining the folder and the applicator in substantial registry with the edge "b" whereby the ribbon 3b is accurately applied to and folded around the edge " b " irrespective of variations in the lateral position of the edge " b." As shown in Fig. 1, a strip 2 of tyre breaker fabric is supplied by a conveyer 10, passes under a guide roller 11, through fabric centring means 30, around a guide roller 31, through an edge ribbon applicator means 50 supplied with a pair of ribbons 3a, 3b from a means 40, around a guide roller 51e and is rewound, with a liner 4a supplied from a spool 5, on a take-up spool 20 carried on a pivotally mounted arm 20a and maintained in contact with a driven drum 25. The centring means 30, Fig. 5, comprises parallel rollers 12, 13 journalled between plates 14, 15 pivoted to movable blocks 14<SP>1</SP>, 151 supported for movement along inclined paths by fixed guide rods 17, 18. The rollers 12, 13 are tiltable by movement of the block 14<SP>1</SP> by an hydraulic cylinder 19 controlled by means 16a connected to a pneumatic or photo-electric edge sensing head 16 fixed adjacent the path of an edge " a " of the strip 2. The rollers 12, 13 are tilted in response to shifting of the edge " a " to move this edge back into register with a turnover blade 50a, Fig. 10, of the means 50. The means 40 comprises a roll 41, Fig. 3, which supplies a strip of gum material 3 to a driven hard-surface roller 42 above which is located a plurality of cutter discs 43 to slice the material 3 into ribbons 3a, 3b, 3a<SP>1</SP>, 3b<SP>1</SP>. The marginal scrap ribbons 3a<SP>1</SP>, 3b<SP>1</SP> are advanced by driven rollers 44a, 44b over a pair of inclined idler rollers 65 and pass under a spring-biased rubber-tyred wheel 67 to a scrap receptacle (not shown) together with a liner 41a from the roll 41. After passing around a driven roller 45, the ribbons 3a, 3b are idependently withdrawn by rollers 46a, 46b of which the roller 46a is journalled in fixed position and the roller 46b is journalled in a bracket 47 slidable on a frame 1 so as to be movable towards and away from the roller 46a. The means 50 comprises two pairs of rollers 51a, 51b and 51c, 51d, the strip 2 being maintained horizontal as it passes between the rollers 51b, 51c, and a pair of parallel turnover blades 50a, 50b, Fig. 10. The blade 50a is mounted on fixed brackets (58<SP>1</SP>), Fig. 8 (not shown), and the blade 50b is fixed to the bracket 47. A horizontal guide surface for the strip 2 is defined by fixed parallel blocks (52a), (52b), Fig. 8 (not shown), and a block (52c) parallel thereto and fixed to the bracket 47. The blades 50a, 50b are shaped as shown in Fig. 10 to fold the ribbons 3a, 3b about the edges " a," " b," respectively. An edge sensing detector (48), Figs. 7 and 8 (both not shown), is carried by the bracket 47 and is positioned adjacent the edge " b." Signals from the detector (48) control a piston-cylinder arrangement (49a), (49b) to move the bracket 47 with the detector (48), the blade 50b and the roller 46b so as to maintain the blade 50b in registry with the edge " b." Following the turnover operation, the rollers 51c, 51d ensure that the ribbons 3a, 3b are securely adhered to the strip 2.