Patent GB-794832-A (GB)
Title: Improvements in or relating to shoe upper conforming machines
IPC: A43D21/16
Filed: 1955-06-18
Abstract: 794,832. Shoe upper conforming machines BRITISH UNITED SHOE MACHINERY CO., Ltd., (United Shoe Machinery Corporation). June 18, 1956 [June 18, 1955]. No. 17664/55. Addition to 747,717. Class 17(1) The machine described in the parent Specification is modified as follows, (1) the time at which the flexible portions of the wipers are bent towards the shoe bottom is controlled in accordance with the lateral position of the shoe in the machine, (2) the extent to which the flexible portions of the wipers are bent towards the shoe bottom is limited by means engageable with the bottom of the shoe, (3) the flexible portions of the wipers are bent into conformity with the contours of the shoe bottom by thrusting on blocks secured to those portions and supported for pivotal movement heightwise of the shoe. The resilient wiper plates of the machine described in the parent Specification are each replaced by two resiliently flexible metal plates 52, 60, Figs. 1 and 5, the 'former having a portion a to lie between the bottom of the shoe and blade 42, Fig. 5, and a portion b extending heelwardly to overlap the shank wiper 60. Early in the operating cycle arms 182, Fig. 1, are swung towards each other, by known mechanism, to engage the shoe positioning pads 184 with the shoe, and act via link 172 to move stop member 154 inwardly. Later, when arms 20, Figs. 1, 2, 5, are operated to move the wipers inwardly, control rods 158, Fig. 1, are moved inwardly and slide through members 154 until the adjusting nuts 155, Fig. 1. engage the stop members, latches 150 are then withdrawn, releasing pistons 104 to the action of fluid under pressure previously admitted to cylinders 102. Movement of the pistons acts via rod 106, bell crank 120, Fig. 2, and thrust rod 126 to move, towards the shoe, blocks 62 to which wipers 60 are removably secured. Preferably the adjustment is such that pistons 104, Fig. 1. are released as parts a and b of wipers 52 pass inwardly beyond the insole margins at the ball, the leading edges of wipers 60 then being outward of the insole margins at the shank. During the initial movement of blocks 62 towards the shoe the blocks pivot about pins 82, Fig. 5, on plates 80. The leading edges of wipers 60 at the heelward ends are then at the level of the extreme outer edge of the insole. This movement of blocks 62 is limited by the engagement with the previously lasted upper at the shank of a member 206. Figs. 1, 2, comprising two parallel rods 208 connected to the blocks 62 by studs 200 and supported at their ends by springs 216. As soon as member 206 engages the shoe, plates 80 swing about pivots 84 carried by heating units 88, bending the heelward ends of wipers 52 until parts b engage the shoe bottom, and as the wipers continue inwards blocks 62 articulate about pivots 82 and/or 84 so that wipers 52 are bent to conform to the shoe bottom where it curves towards the shank, and wipers 60 press against the upper in the shank. During their inward movement wipers 60 are free to bend upwardly against the resistance of spring pressed pins, which normally hold the wipers in a downwardly canted position, in order to conform to the shape of the shoe bottom. By limiting the extent of the downward movement of blocks 62, by means of member 206, the danger of the leading edges of wipers 60 striking the edges of the insole is minimized. Specification 746,823 is referred to.