Patent GB-108533-A (GB)
Title: Improvements in or relating to the Moulding of Parts of Boot and Shoe Uppers.
IPC: A43D8/04
Filed: 1916-08-11
Abstract: 108,533. British United Shoe Machinery Co., (United Shoe Machinery Co.). Aug. 11, 1916. Uppers, machines for.-A machine for moulding marginal flanges on uppers prior to lasting, exemplified in a machine of the type described in Specification 23,685/12 for shaping the heel end of an upper, comprises means for moulding the fiange by a series of rubbing actions. The inside former 15, Fig. 1, preferably heated electrically, is mounted at the head of a two-part plunger 10 separated by a stiff spring 12 and mounted in a support 8, which is adapted to be moved laterally by links 6, 5 actuated by a cam on a shaft 4 to carry the assembled shoe upper, which is positioned by means of a pivoted height gauge 97,- into shaping position. In this position, the plunger 10 alines with a member 16, which is adapted to be lifted to raise the former 15 by a toggle 17 and a cam.actuated link 18. When in shaping position, the back of the upper adjacent to the upper edge of the heel-stiffener presses against a thin plate 50, Fig. 2, which is mounted on a slide bar 52, and is normally projected forward by a spring 54. The plate 50 overlaps the lower edge of a leather lining 45 to the outside former, which comprises two front sections 25, Fig. 3, linked to two rear sections 26, each of which is separately pivoted to the head of a plunger 28 slidable to a limited extent in a yoke 30; a spring 32 encircling the plunger allows the outside former to yield when the inside former is moved into shaping position. The members 25, 26 are operated upon by spring-pressed plungers 36, 37 carried in blocks 38 movable in arc-shaped guide-ways 39, and the front ends of the members 25 are engaged by yielding links 35 pivoted to push bars 34 extending from the yoke 30. The outside former mechanism, which is housed in a recess in the head plate of the machine, is adapted to be actuated by a rod 40 connected to the cross-head 30 and to one link of a toggle 42, Fig. 1, which is actuated through a link 43 from a cam on the shaft 4; as the toggle is straightened, the push bars 34 are advanced and, since they are guided against the lateral walls of the recess in which they are housed, the links 35 effect both a forward and an inward pressure on the members 25. The flange-forming means are located beneath a cap plate 62 and comprise rear members 60, Fig. 8, connected by links to the cross-head of an operating rod 65, and side members 64, which have a sliding connexion with the members 60 and also a pin-and-slot connexion 66 with the cap-plate 62; as the members 60 advance and swing inwards, the acting edges of the members 64 swing inwards and backwards over the shank and front part of the heel seat. The rod 65 is connected by a lostmotion device with a strap 70, Figs. 1 and 6, embracing an eccentric 72 loose on a shaft 75, which is continuously driven from the main shaft 1. The eccentric is adapted to be operated through a clutch comprising a recessed sleeve 76 pinned to the shaft 75 and a spring bolt 78 carried by the hub of the eccentric; this bolt has an upstanding stud 80 adapted to be engaged by a spring-pressed controller 82 carried by a lever 84, which is located so that it can be actuated by a plate 85 on a cam-operated bar 86. The cam shaft 4 is controlled from a treadle 90 through a one-revolution clutch, as described in Specification 23685/12, and when the treadle is depressed the inside former is drawn inwards first to engage the plate 50 and then to seat against the outside former, after which it is raised by the member 16. The outside former is then closed by the toggle 42, after which the bar 86 is moved downwards to rock the lever 84 and release the clutch bolt 78, whereupon the eccentric 72 commences to rotate and the wipers are closed in to form the flange. The cam shaft 4 is then stopped, leaving the work clamped between the formers, and the bar 86 in its lowest position,.so that the eccentric remains in ear and the wipers continue to reciprocate. The first movement of the wipers is a long one, but, swing to the lost-motion device above referred to, the stroke of the wipers is afterwards shortened so that they remain in engagement with the flange. This lost motion is obtained bv providing the rod 65 with a sliding engagement with its bearing 92, Fig. 6, in the eccentric strap, and fitting it with a collar 94 and adjustable stop nuts 93 spaced apart a distance greater than the length of the bearing. A stud 95 projects from the collar and is normally engaged by a spring-pressed hook 96 pivoted to the bearing 92. In this position, there is no lost motion, but when the rod 86 is lowered the plate 85 engages a stud projecting from the hook 96 and disengages the hook so that the lostmotion becomes operative. This continues until the treadle 90 is again depressed, when the inside former is lowered to relieve the drag of the wipers, the rod 86 is raised to render the lost motion device inoperative, so that the wipers will be fully retracted, and to release the lever 84, whereupon the eccentric 72 is thrown out of operation. Finally, the work is unclamped and the inside former is moved out to work-receiving position. The tread face of the inside former is provided with an incline 98, Fig. 2, and as the wipers advance they ride over this incline and bite into the work and rub the flange so as to extend its width inwardly; as the wiper rides to and fro over the incline, the inside former receives a slight up and down movement, permitted by its supporting-spring 12 and limited by a stop 14, so that it effects a. smoothing of the inner face of the upper materials and also applies pressure to these materials at and adjacent to the line on which the flange was turned.