Patent GB-597307-A (GB)
Title: Improvements in or relating to heel attaching machines
IPC: A43D83/00
Filed: 1945-08-14
Abstract: 597,307. Heel-attaching machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., CLARKE, T. B., and BARKER, W. A. Aug. 14, 1945, No. 20826. [Class 17 (i)] Consists in improved means for positioning and clamping a shoe in relation to those parts of a heel-attaching machine which effect the attachment. The clamping means are moved into engagement with opposite sides of shoe as a consequence of movement of a member by the heel end of a shoe as it' is presented by the operator to the machine. They are moved as the shoe approaches a relatively fixed member which positions the shoe lengthwise in the machine. When the machine is thereafter power-operated, the clamping members are pressed against the shoe. The invention is described as employed in a machine of the character described in Specification 580,814, the positioning and clamping means being similar to those described in Specication 525,959. The shoe is positioned relatively to the attaching means by two members 1, 1 which engage the crease between the upper and sole margin on opposite sides of the shoe just rearward of the breast line, by two clamping members 53 which engage the shoe more or less directly above the members 1, 1 and which, after the shoe is correctly positioned, are caused, by power-operated means, to clamp the shoe for the attaching operation, and by a V-shaped fork member 161 and blocks 163, 165 which engage the shoe at the rear end. The members 1, 1 are pivoted to blocks 7, 7 adjustable on arms 3, 3 by screws 5, 5 in a manner which permits their rear ends to yield. A stem 13 on one arm 3 fits in a sleeve 15 on the other, and both stem and sleeve are mounted on a slide 17 supported by a member 20 slidably mounted in a bracket 22 so as to be adjustable vertically up and down, and horizontally backwards and forwards and also laterally by means similar to those described in Specification 525,959. A bracket 19 secured to the slide 17 carries at its right-hand end a lever 23 which is pivotally connected to the right-hand arm 3 by a link 41 so that, as a rod 29 is turned by a knurled collar 30 to screw into or out of a block 39 pivoted on the slide 17, the lever 23 is 'swung about its pivot to adjust the right-hand arm 3 about the pivot. A spring 33, which extends between a block 27 and the collar 30, holds a flange 31 on the rod 29 against the bracket 22 so as to permit the members 1, 1 to yield bodily when a shoe is inserted in the machine. The left-hand arm 3 is adjusted simultaneously by the same amount but in an opposite direction by the lever 23 through a rod 43, lever 45 and link 49. The clamping members 53 are carried on pivoted arms 75 and each comprises a felt pad 55 mounted on a block 57 carried by a plate 61 (not shown) in such. manner as to permit the block to tip up and down and also to rock to accommodate itself to the shoe shape, the plates 61 being adjustably secured to the arms 75, by a nut 77. The arms 75 are pivoted on studs 79 on the arms 3, and are moved towards the shoe, through a slide 157 and springs 147, until the clamping members 53 engage the shoe, by rearward movement of the V-shaped fork 161 by the shoe. Continued rearward movement of the shoe by the operator extends the springs, 147 to hold the members 53 with equalised pressure through a compensating arrangement against the shoe until the shoe engages the member 163, to position the shoe lengthwise and heightwise by the members 1, 1 and 163, 165, and laterally by the fork 161 and members 53. Rearward movement of a rod 139 connected to a bellcrank lever similar to the lever 157 of Specification 525,959 then causes the clamping members to clamp the shoe by a relatively strong spring corresponding to the spring 167 of that Specification. The rod 139 is moved positively in the opposite direction to release the clamping members in the manner described in that earlier Specification. Equalised, clamping pressures are applied to the levers 75 and members 53 through a pivoted member 153 which is connected by the springs 147 to lugs 141 on the arms 75. Specification 475,579 also is referred to.