Patent GB-977181-A (GB)
Title: Pressure pad assembly for shoe press
IPC: A43D25/07
Filed: 1961-04-24
Abstract: 977,181. Sole presses. SCHUHMASCHINEN-GESELLSCHAFT HANKE & CO. April 24, 1961 [April 22, 1960; July 15, 1960], No. 14790/61. Heading A3B. A pressure pad assembly for gluing soles with or without heel flaps on shoes comprises an inflatable moulded pressure pad 17, its surface being reinforced at certain places and having a front part and rear part normally disposed substantially at right angles to each other. The aforementioned angle may be varied by the movement of the pad support which comprises a heel flap plate 5, which is adaptable to be locked in different positions, pivotably connected to a shank plate 4 which is in turn pivotably connected to a bottom plate 6. The former pivoted joint 3 is supported by the main supporting element 1 through a cross-arm 2 and the latter pivoted joint 10 is supported by its sliding engagement with a plate 9 which is adjustable heightwise. The pad 17 is clamped to its support by two horeshoe shaped components 18, 19 each possessing a forwardly projecting spigot 22, 21 which are held in positions with respect to each other by a spring 23, screw 20, a clamping frame 24 which is secured to the heel flap plate by screws. Component 19 also possesses an inwardly bent collar which surrounds the bottom plate 6 so that the pressure pad can only yield in a vertical direction. A heel bracing member comprises a pneumatically operated cylinder 39 the piston rod 43 of which pivotally supports a guide member 46 to which is clamped a slide member 48 carrying a pressure pad 49. The member supported by piston rod 43 is replaceable by an inflatable heel pressure pad which is held in a bore of the bracket 26 of the main supporting element 1 for gluing a sole without heel flaps to shoes (Fig. 4, not shown). A second pressure pad assembly is described for offering a heel tread surface on the shoe as well as a heel flap in which the heel bracing member is replaced by a modified heel pressure pad (Fig. 5, not shown). This heel pressure pad is fed with fluid from the same source as the main pad, a valve being provided which cuts off the supply of fluid when the heel pressure pad is not in position. The aforementioned plate 9 is movable heightwise on a column 8 which forms a gear rack. A worm shaft, supported in the bearing cover 15, meshes with the rack and is rotated by the movement of a chain 30, tensioned by a sprocket wheel 61, passing around an associated sprocket wheel 29 (not shown) the movement of chain 30 being effected by the rotation of handwheel 31 or a servomotor and its associated sprocket wheel 28. The extension 13 of plate 9 carries a quick-setting device which comprises a coarse threaded screw, the head of which 62 engages the bottom plate 6, and a controlling mechanism of an arm, pawl and ratchet so that the bottom plate 6 may be pivoted with respect to the shank plate 4. The pivoting of heel plate 5 about the cross-arm 2 is controlled by the rotation of a handwheel 38 which moves the heel plate 5 through the links 35, 34, 33 and 32. The above three movements are indicated by pointers 55, 56 (not marked) and scales 54 (not marked) and 58. Uniform pressure is applied to the heel joint area of a shoe by the addition of an adapter 139 to the pad (Fig. 16). The adapter comprises a profiled apex to fit the heel joint and flaps made integral with the apex or attached separately and which merge smoothly in with the surface of the pressure pad. A metal piece may be moulded into the apex of the adapter so that the heel joint of the shoe meets a greater resistance from the material of the adapter which may be a thermo-plastic.