Patent GB-191505931-A (GB)
Title: Improvements in and relating to Tire-making Machines.
IPC: B29D30/16
Filed: 1915-04-20
Granted: 1915-11-25
Abstract: 5931. Goodyear Tire and Rubber Co., [Assignees of Convery, J. J.]. July 27, 1914, [Convention date]. Tyres, elastic, special apparatus for making.- Relates to tyre-forming machines of the type in which the rubber-impregnated fabric forming the lining of the beaded tyre cover is pressed on to a rotating core by rollers, Figs. 1, 2, and 3 being respectively side elevation, front elevation, and plan of such a machine, in which a strip of fabric supplied from a stock-roller R is stretched round the core 31 while the core is being rotated at slow speed from the driving-shaft by clutching the pinion 23 to the shaft 21. After sufficient fabric has been wound on, the clutch 27 is operated to rotate the core more quickly, and the handlever 49, Figs. 2, 3, and 7, is moved to engage the divided clamp-nut 46 of the carriage 35 with the feed-screw 37, which is rotated by means of the bevel-gearing 42, 41. As the carriage is moved along the guide 33 by the rotation of the feed-screw, it carries the two rollers 57 towards the core, these rollers being supported on arms 58, Figs. 3 and 16, which are rigidly connected to pistons 62. The pistons slide in cylinders 63 formed on brackets 59, and can be drawn into the cylinders by springs 67 and pressed outwards by pressure fluid admitted to the cylinders through a valve 71 and flexible tubes 68. The brackets 59 are provided with pivot studs 86, Figs. 13 and 16, mounted to turn in cross-heads 87, which can slide in guides 88 supported by the carriage 35, and the pivot studs carry toothed wheels 89 which mesh with racks 90 fixed to the guides. Consequently,any rotation of the rock-shaft 93 will, by means of mechanism 92, 91, move the crossheads 87 and wheels 89 to turn the brackets 59 on the pivot studs 86, and so to change the angle of the rollers 57 relatively to the core 31, this motion of the rollers being especially used after the beads of the tyre edges have been placed in position. The rock-shaft, journaled in a bearing 95 on the carriage 35, has a depending arm 104, Figs. 3 and 20, which carries a roller 103 movable in a fixed camway 102, so that when the roller traverses the downwardly-extending end part 166 of the camway, the rock-shaft is rotated and the brackets 59 and rollers 57 turn relatively to the core. When the moving parts reach a predetermined position, further advance is stopped by means of a block 53 and a lever 52 pivoted to the top of the carriage. As the carriage moves forwards, the block 53 engages a stop-block 54 and slides to turn the lever 52, which moves the handlever 49 outwards and thereby disconnects the nut 46 from the screw 37. Pivoted to the hand-lever is a rod 79 which carries a collar 81 having a pivoted arm adapted to engage the arm 74 of the valve and close it at the proper moment, and also place the flexible tubes 68 in communication with the atmosphere, so that the pistons 62 can be drawn into their cylinders by the springs 67. After the moving parts have been brought to rest, the carriage may be repositioned by power or by means of the handles 151. The position of the cam-block 101 is adjustable by means of a block 123 pivoted to the top of the cam-block and a rod 122 connected to the stop-block 54, to limit the travel of the roller 103 to the straight horizontal part of the camway 102, whereby no rotation of the rock-shaft 93 occurs during the motion of the moving parts. The lateral position of the rollers 57 relatively to the core is adjustable by means of the right and left hand screw 97. After the layers of fabric have been pressed by the rollers 57, the edges are trimmed by knives 139, Figs. 2 and 17, secured to blocks 140 pivoted to hand-levers 141 fulcrumed on brackets 134 adjustable, by means of the cross- . heads 129 and handles 132, on the arms 127. These arms are pivoted on studs 126 on the guides 88 and are retained in position by toothed collars 146, which permit the arms to be turned out of the way when not in use.