Patent GB-482761-A (GB)
Title: Improvements in machines for moulding shoe heel stiffeners
IPC: A43D8/00
Filed: 1936-11-18
Abstract: 482,761. Moulding shoe - stiffeners. CHAMBERLAIN, W. H. Nov. 18, 1936, No. 31590. [Class 17 (i)] A shoe heel-stiffener moulding-machine of the Stewart type has means for presenting a stiffener blank to the moulding members comprising a carrier moved towards and away from them in timed relation to the descent of the wiper slide. The male former 12 carried for vertical movement on a plunger 13, the pair of female members 11 and the wiper slide 14 are constructed and actuated as usual. The plunger 13 supports a shaft 54 to which is secured an arm 53 carrying a plate 29 to which is secured a block 30 over which is fitted the stiffener blank. Jaws 32 grip the edge of the blank to be flanged, each jaw being carried by an arm pivoted at 47 and having at its free end a pin 48 traversing a slot in the plate 29 and provided with a roll co-operating with a lever 51. The arms are connected by a spring 50, which urges the jaws towards the form, and may be forced apart by flexible wire transmission mechanism operated by a handle 116. The shaft 54 is oscillated to move the presenter towards and from the moulds by an arm 63 actuated by a shoe 65 on a cam-shaft 66, the presenter being urged away from the moulds by springs wound on the shaft 54. The camshaft 66 is driven by a chain 67 from a shaft 68 under the control of a clutch engaged by a rod 78 guided and provided with a plate 80 normally overlapping a plate 79 carried by a link 76 pivoted to a treadle 74. A driving pulley 28 on a shaft 26 is connected by a clutch with a pinion driving a gear-wheel on a shaft 19 the clutch fork 90 being secured to a shaft 91 having arms 92, 93. The arm 92 is connected to a rod 94 actuated by a cam on the shaft 66 so that the clutch is kept in engagement for one rotation of the shaft 66 and is then freed. The arm 93 is connected to a bell-crank lever, the free arm 102 of which bears against the link 76, so that while the machine is being driven the link 76 is urged to the left against a spring 83 to remove the plate 79 from the path of the plate 78. The shaft 66 carries another cam actuating a lever 85 connected to the rod 78 to ensure that the shaft performs one revolution and then stops. The shaft 26 is frictionally connected to an arm 37 linked to the male form 12, brass and wooden blocks 38, 39 clamped over the shaft urging the form to operative position when the shaft is rotating. When the machine stops, a spring 44 moves the form to work-changing position. The fork 90 is provided with a pawl co-operating with a recess in a boss on the shaft 19 to prevent the clutch being disengaged until the shaft has performed a complete rotation. The lever 23, which actuates the wiper, is connected by a link 124 and arms on a rock-shaft with a push-rod 120 guided to co-operate with a lever 119 carrying a tooth 131 adapted, normally, to secure the arm 63 to its shaft 54 by engaging a recess 132. As the wiper descends, the tooth is retracted, to allow the presenter to be urged by its spring to out-of-the-way position. Before this mechanism comes into action, in the descent of the wiper, fingers 107 pivotally carried on a bar 108 engage projections 109 on the levers 46 and open the jaws. The tails of the fingers then engage a bar 113 to swing the lower ends of the fingers forwardly to move the presenter to its out-of-the-way, work receiving position. If it should fail to move, it will be pushed away clear of the wiper by an oblique striker plate 110 secured to the lower edge of the wiper.