Patent GB-727418-A (GB)
Title: Improvements in or relating to the shaping of shoe soles
IPC: A43D29/00
Filed: 1952-04-19
Abstract: 727,418. Shaping soles. BRITISH UNITED SHOE MACHINERY CO., Ltd. (United Shoe Machinery Corporation). April 20, 1953 [April 19, 1952], No. 9883/52. Class 17 (1). A machine for shaping shoe soles S by pressure comprises shaping members 10, 12 relatively movable to apply shaping pressure at opposite surfaces of the sole, a sole supporting device 22 extending'between the shaping members, sole locating members, and means automatically operative at an early stage in the relative movement of the shaping members to cause the locating members to engage a sole on the support and position it in predetermined 'relation to the shaping members, and during continued relative movement to retract the locating members. The locating means position the sole by lengthwise and widthwise movement thereof. The upper mould member 10 is stationary while the power-operated mould member 12 of rubber &c., with a resilient pad 14, is carried on a vertically movable cross-head which also bears mould retaining walls 18, 20 (not shown). The sole support comprises a flexible blanket 22 anchored to bell-cranks 30, 32 adjustably secured to pivots 34, 36 and connected by a spring 38. The locating members comprise toe and heel abutments 40, 42, side gauge jaws 44, and heel gauge jaws 46. Abutments 40, 42 are fixed to arms 48, 50 secured to bell cranks 56, 58 which are movable with mould member 12, pivoted at 60, 62, interconnected by means of a pin 68 on arm 66 engaged in a slot in arm 64, and urged toward each other by spring 140. A longitudinally adjustable plate 128 secured to stationary posts 120 has V-shaped cams 130, 132, the former being engaged by a roll 138 on lever 56 as mould member 12 rises to move levers 56, 58 and hence abutments 40, 42, first inwards to engage the sole, and then outwards. The two pairs of jaws 44, 46, supported on bracket 70, each consists of two horizontal jaws located on either side of mould member 12 and provided with inwardly curved portions 80, 81. Each portion 80 terminates in a conical finger 82 and a roll 84 to engage the sole edge. Jaws 44 are pivoted at 45 and urged inwardly by compression spring 88, while jaws 46 terminate in upstanding inclined lips 98, have sole engaging rolls 100, are pivoted at 102, and urged inwardly by tension spring 104. Movements of jaws 44 are equalized by means of extensions 106 which slidably engage with each other by pin 108 and slot 110. Similarly jaws 46 have extensions 112 with pin 114 and slot 116. Spring 104 acts through portions 81, pin 154 thereon, link 152, and a stud 150 on a lever 144 pivoted to bracket 70 to urge a roll 142 on the lever into engagement with cam 130, so that as mould member 12 rises jaws 44, 46 are first moved towards each other to position the sole, and then outwardly. Pins 154, 156 bear on portions 80 to assure similar sidewise retraction of both sets of jaws. A projection 162 on bracket 70 registers with a notch 160 on plate 128 to assure the correct relationship between cams and rolls. To prevent it from moving, once it is positioned, the sole is engaged by a rubber plug 178 on the end of a plunger yieldingly mounted for relative movement in a sleeve secured to the cross head. As the mould members come together plug 178 clamps the sole, being yieldingly depressed against the resistance of the spring acting on the plunger. Mould member 10, regardless of the efficiency of the cam action, engages the upwardly moving inclined surfaces of fingers 82 and lips 98 to move them sidewise and away from the sole. Fingers 82 and lips 98 aid the operator in placing the sole.