Patent GB-1048751-A (GB)
Title: Pulling over and lasting of shoes
IPC: A43D21/18
Filed: 1965-01-21
Abstract: 1,048,751. Shoe upper conforming machines. J. S. KAMBORIAN. Jan. 21, 1965 [Jan. 27, 1964], No. 2704/65. Heading A3B. A pulling over and lasting machine operates as follows. The shoe assembly, with a ribbon of adhesive 608 (Fig. 48A, no Figs. shown) on the margin of the toe end of the insole, is placed bottom down on insole rests 54, 66 and support pins 74, 88 with the last bearing against retarders 172, 184 and the lasting margin in the open front pincers 138 and forepart pincers 270. This position is shown in Figs. 48, 48A, 48B. Pedal 550 is now depressed to effect the pulling over portion of the machine cycle. Pincers 138, 270 close on the upper, which is stretched about retarder 170 by pincers 138 moving downwardly and rearwardly and pincers 270 moving downwardly, toewardly and inwardly, toe support 122, heated to prevent the cement from setting, is raised against the insole, and side retarders 184 are lowered, so that dog ears 706 are formed in the upper. The machine now comes to rest (Figs. 49-49B) and if required the operator may return parts to idle position. Further actuation of the pedal causes the machine to complete its cycle. Wipers 460 and yoke 492 move to the working position, hold down 408 bears against the shoe under the influence of gravity, and toe post 20 rises forcing the shoe through yoke 492, which is under light pressure until the top of the insole 602 is slightly above the top of the wipers 460. During this rise retarders 184 rise to press the dog ears 706 against the wipers, hold down 408 rises with the shoe, pincers 138 are released, and retarder 172 presses the toe margin against the wipers. Hold down 408 is then pressed against the shoe with a light pressure, heel clamp 332 is brought to bear against the heel of the shoe and is locked in position, and yoke 492 is forced against the shoe under heavy pressure (Figs. 51-51B). Wipers then wipe the lasting margin at the toe and fore-part against the insole and adhesively bond it thereto. During wiping knife 470 is projected forwardly of the vertex of the wipers and cuts the pleated upper gathered by the wipers (Fig. 53), pins 74, 88 are forced inwardly by the wipers, retarder 172, support 122, and retarders 184 are lowered out of the way of the wipers, pincers 270 are opened, and the toe post 20 with the support members is lowered. At the end of the wiping stroke the hold down 408 is forced downward under heavy pressure to force the bottom of he shoe against the wipers for a pre-determined time. The parts are then disengaged and returned to idle position. The shoe support (Figs. 3-7 and 11) includes a toe platform 44, adjustable heightwise on the post 20 which is moved height-wise by motor 16, carrying a toerest 54, two fore-part rests 66, adjustable lengthwise and height-wise on the platform, and support pins 74, 88 on spring urged fingers 72, 84. Toe support 122 is raised to operative position by motor 94 via toggle 98, 100. The toe gripper (Figs. 8-10) is closed by motor 142 acting on lower jaw 154, and moved height-wise by motor 128. The forepart grippers (Figs. 13-20) are opened and closed by motor 264, the lower jaw opening first, and are moved height-wise by motor 246 universally mounted on a pin 204 which is adjustable length-wise of the shoe on a base 186 by means of nut 228 and adjustably rotated by means of knob 242. Base 186 is adjustable height-wise on toe post 20. In the idle position the assembly is held in outward position against the adjustable cam 254 by spring 258 and in forward position with set screw 250 against stop plate 210 by gravity. The downwardly directed forces exerted by the pincers may be individually and selectively increased or decreased as described in Specification 996,113. The front retarder blade 172 (Fig. 8) normally raised by means of motor 156 is lowered by spring 166. Side retarders 184 (Fig. 12), mounted on columns 174 which are adjustable transversely of the shoe, are moved height-wise by motors 176. The curvature of the heel clamping chain 332 (Fig. 21-26) is adjusted by end screws 334, and the chain is adjustable height-wise on yoke 310 which is adjustable lengthwise on slidable rods 304. Rods 304 are moved by motor 296 to move the clamp lengthwise on to the shoe, and are locked in position by brakes 338 operated by motor 362. Hold down lever 398 (Fig. 21, 31) is pivoted at 396 on a slide plate 390 which is moved length-wise of the shoe by motor 366. When plate 390 is withdrawn the holddown is held in elevated position by adjustable striker plate 417. When plate 390 is moved to forward position the hold-down is lowered by gravity and then forced against the shoe by cam 422 actuated by motor 428. The hold-down pad 412 is adjustable about a pivot 410 and is adjustable height-wise by knob 406. The wiper assembly (Fig. 30, 32) carried on the slide plate 390, comprises wipers 460 which are adjustable about vertex 464 by means of knob 446 so as to lie close to the shoe, and wiper cams 448 which are actuated by motor 430. The wiper movement is first an inward swinging, then combined swinging and forward movement and finally a forward movement only. Knife 470 (Fig. 34-37) carried by plate 390 and adjustable length-wise of the shoe by means of ratchet 476 and pawl 478 is actuated by the wiper cams and reciprocated by pin 468 moving in undulating slot 469. Shoe conforming yolk 492 (Figs. 40-41) situated directly above the wipers and carried on plate 390 is formed of flexible deformable material and bowed springs 530. The yolk is supported by a socket 532 adjustable lengthwise of the shoe, and by arms 534 connected to spring arms 540, and is urged against the shoe by motors 518 connected to arms 534. The air operated control circuit of the machine (Figs. 46), the location and method of actuation of the various valves, and the construction of the operating pedal (Figs. 42-45) are also described.