Patent GB-855599-A (GB)
Title: Improvements in shoe end lasting machines
IPC: A43D21/12
Filed: 1957-02-01
Abstract: 855,599. Shoe end lasting machines. KAMBARIAN, J. S. Feb. 1, 1957 [Feb. 3, 1956; April 18, 1956], No. 3525/57. Class 17(1) An end lasting machine comprises a last support, wipers movable relatively to the support in directions extending respectively heightwise, and fore and aft of a shoe on the last, power operated cams to effect such movements, and an operating handle mounted for to and fro movement transversely of its length to control the movements in one of the directions, and for to and fro turning movement about a lengthwise axis to control movements in the other direction. The wipers 10 are advanced and retarded by a pneumatic cylinder and piston 42 acting via bell-crank 62 and links 58, 70, and the shoe support comprising a carriage 14 with a last-mounting pin 32 and a post 36 with a toe support 34 is moved heightwise by pneumatic cylinder and piston 44. The pneumatic cylinders 42, 44 are controlled by respective valves V1, V2, each comprising a valve spool 117 movable in a casing 115 having an inlet 116, ports 118 communicating with the cylinder, and vent ports 120. The spool, which is shown in its neutral position in Fig. 2, connects the right hand end of the cylinder to the fluid supply and the left hand end to exhaust when moved to the left, and reverses these connections when moved to the right. Valve V1 is operated by horizontal to and fro movement of the handle 40 which moves angle arm 80 about its pivot 82, the spool extension 92 being connected by pin 94 and slot 95 to arm 80. The latter is connected via plate 88 and bracket 90 to the wiper operating slide so that handle 40 moves lengthwise of the shoe with the wipers. Valve V2 is operated by rotation of handle 40 by means of a cam 112 fast on the handle which acts via cross bar 110, vertically slidable right angle 111, link 100, and pivoted link 98 which engages the spring pressed spool extension 96 spring 113 holds the cross bar in contact with cam 112. Valve V1 is fastened to plate 88 (not shown) and therefore reciprocates with the wiper slide, and valve V2 is secured to post 36, thus when a valve spool is moved to operate the wipers or the shoe support the valve casing will move with that part a corresponding distance to restore the valve to neutral position. Valves V1, V2 can be operated separately or at the same time. The wipers and shoe support are operated to cause the upper to be wiped upwardly and then inwardly, the insole and upper margins are coated with adhesive, and the wipers are fully advanced while the shoe is pressed upwardly. To augment this pressure a secondary wiper 144 is advanced between the primary wipers 10 and the shoe bottom. For this operation the shoe may be lowered slightly, the primary wipers may be withdrawn, and the secondary wipers may be heated. The secondary wiper has spaced top and bottom surfaces 152, 154, Fig. 8, the forward end is shaped to the toe of a shoe, as at 156, and the bottom surface has an upwardly extending recess 166, which is transversely and longitudinally concave to accommodate the spring of the last and the pleats of excess upper material, so that the wiper edges remain in intimate contact with the upper margins. A heating element is housed. in chamber 168. The secondary wiper is operated by a double acting pneumatic cylinder 176 controlled by a valve V3 which is operated by means of a manually operated rod 192 and lever 190.