Patent GB-654360-A (GB)
Title: Improvements in or relating to lasting machines
IPC: A43D21/12
Filed: 1947-05-01
Abstract: 654,360. Lasting machines; nailing. BATA, NARODNI PODNIK. May 1, 1947, No. 11707. Convention date, Sept. 30, 1944. [Classes 17(i) and 89(iii)] A lasting machine has a plurality of fixing stations arranged in a fanlike manner each consisting of a wiping device which wipes the margin of the upper over the edges of the last and insole and a nailing or other fixing means and each having its own hydraulic drive which moves them forward into operative position until they are arrested by the last. The shoe is placed on a support 1, Fig. 1, and the upper is pulled over by nippers 2, 3, 3<SP>1</SP>, 4, 4<SP>1</SP> and then held in position by a former plate 5 which extends as far as the waist of the shoe. Nippers 2, 3, 3<SP>1</SP> then release the upper, and the nippers 4, 4' are operated to wipe and tack the upper at the point of greatest tension. Two plate wiping members 6 then operate to in-wipe the toe portion and remain closed holding the upper in the wiped position. The nippers 4, 4<SP>1</SP> then release the upper and the remaining fixing stations operate. Each fixing station is mounted on a standard 8, Fig. 2, and has a hydraulic cylinder 10 with a piston 13 connected to a slide 19 by a rod 14 and an arm 18. The slide 19 is mounted by rollers 68, 68<SP>1</SP> in grooves 69 and can be removed as a unit when released by the levers 70, 72. A double-armed lever 23 is mounted in a recess 21 on a pivot 22 and at one end carries the fixing head 24 mounted on a rubber pad 29 to allow depression of the head 24 by any irregularities in the upper and at the other end is a screw 30 for adjustment of the initial height of the nailing head relative to the shoe. The striking mechanism comprises a double-armed lever 33, common to all the hammers 26, which is operated by a spring 37, the blow being cushioned by a rubber pad 42 and the spring being 'recompressed by the roller 44 mounting the inclined rail 20 during the return stroke of the fixing station. The fixing head 24 has a channel 25 through which the nails are fed from a flexible tube 66 through the non-magnetic guide opening 63, which is mounted on a pivot 65 so that the nails can be fed point upwards when the fixing station is in the fully withdrawn position. The heads of the nails rest on the magnetized hammers 26. The lever 33 is held with the spring 37 compressed by the projection 52 engaging with a clutch 45 and it is released when the shoulder 58 strikes the former plate 5 so that the trigger 53, and hence the push-bar 54 is pushed back which in turn pushes back the catch 45 against the spring 48, and the striker is released. The nailing heads of the fixing stations IV, IV'-VI, VI' each have a rounded surface 28 which acts as a wiper in the plane of the insole and have projections 27, Fig. 1, which overlap in the wiping position so that any creases in the upper are removed. The fixing stations I<SP>1</SP>- III, III' have a surface 28 in the plane of the wiping plates 6 and only tack the upper after it has been wiped. In operation pressure is admitted to the inlet pipe 11 while the pipe 12 is connected to exhaust and the piston moves the slide 10 towards the shoe. The surface 28 wipes the upper until the trigger is released and the hammers operate to finish tack the upper in the lasted position. Specification 649,089 is referred to.