Patent GB-423026-A (GB)
Title: Improvements in or relating to shoe-upper conforming machines
IPC: A43D21/12
Filed: 1933-04-24
Abstract: 423,026. Boot - making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., and ROBERTS, W. T. B., Belgrave Road, Leicester. April 24, 1933, Nos. 11849 and 35664. [Class 17 (i)] Lasting.-A toe-end lasting-machine has an insole-engaging plate fixed heightwise of the machine, a toe support and heel rest brought up to the shoe to support it with its toe end engaging the plate, wipers maintained parallel to the toe portion of the shoe and movable rectilinearly heightwise of the shoe for upwiping, and means to prevent the wipers moving beyond the position where they are level with the toe, so that overwiping can be effected with the certainty that the wipers are in the correct heightwise position. A single handle brings the toe and heel up to the shoe and advances the clamped shoe to the wipers, reverse movement of the same handle freeing the shoe for removal. Means are provided to allow the wipers to be raised above their normal height for the positioning of a binding wire about the end of the lasted upper. The jack is free to swing laterally in case one side wiper may press the shoe harder than the other, and the wipers have slight lateral play so that they may press the overlasted margin of the upper against the insole lip with equal pressure on the two sides of the shoe. An interchangeable insole engaging plate 49 is dished to support the inner side of the insole lip and is secured to an overhanging arm 57 of a U-shaped jack member 73 provided with a rubber toe rest 51 self-adjusting to the toe by lateral rock in a holder at the top of a plunger 79, and a heel rest 53 at the end of a longitudinally sliding sleeve 93. The heel rest is adjustable by a hand wheel 101 and is moved to or from the shoe by a bell-crank lever 89, the other end of which is linked to a floating lever 81 pivoted to the lower end of the plunger 79. A recess in the lower side of this lever is engaged by the end of a lever 105 pivoted at 107 and carrying at its other end a pivot 116 for a handle 125, the handle having a normally upstanding arm 117 forming a toggle with a link 119 pivoted to the jack. Links 115 at the front and rear of the jack connect the handle 125 with a lever 161, the upper end of which engages a grooved member 165 adjustable along a screw 167. The handle 125 has an extension 239 provided with a rubber pad for engagement by the operator's knee. The whole jack can swing about a vertical pivot 77 on a carriage 149 running on rollers 151, a roller 173 supporting the right-hand end of the jack, and a spring 243 urging the jack to the right. The heel rest is maintained in operative position by pawls 129 engaging fine ratchet teeth, the pawls having tails engaged by a pin 139 moved by a rod 143 resting on an extension of the lever 105 which frees the pawls when the handle 125 is raised. The wipers 11 are retained in their carriers by pins 15 which are withdrawn when the wipers are to be reversed or changed. They are guided by slots 17 in the carriers and are supported by adjustable wedges 37. The wipers are operated by a hand lever 29 provided with a friction pawl 39 engaging a member 41 curved about the wiper handle pivot and freed. when desired by a hand grip 45. The wiper carrier is supported by a vertically movable trunk 5 similar to that described in Specification 164,804, [Class 17 (i)], having adjustably threaded into its lower end a shaft 175, the weight being partially counterbalanced by a spring 245. Ears 233 on a collar on the shaft allow slight lateral swing of the wipers. A bell-crank lever 189 connects the assembly to a treadle 197, depression of which raises the wipers. To limit this upward movement the wiper head carries a shaft 209, at one end of which is an arm pivotally carrying a sleeve 215 engaging a rod 203 carrying an adjustable stop 201 set to contact with the top of the sleeve when the wipers reach the level of the insole. To allow slight further lift of the wipers when it is desired to position a binding wire about the toe end after over-wiping, the rod 209 is provided with a handle 219 normally maintained vertical by a spring plunger. Swing of this handle removes the sleeve 215 from the stop 201 and allows further lift of the wipers until a second stop 231 on the rod 203 is engaged by a lug 229 carried by the trunk 5. In operation, the handle 125 being vertical and the wipers being in their lower position, a shoe is held by the operator with its toe end in position against the insole plate 49 and the handle 125 is depressed. As the lever 105 swings clockwise the toe rest is first raised to clamp the toe end against the plate and then the bell-crank lever 89 is swung to advance the heel rest which is locked by the pawls 129. Simultaneously, the jack is advanced to the wipers by the pull of the rods 115. The treadle 197 is then depressed to perform the upwipe, the handle 29 being actuated to cause the wipers to engage the upper firmly but not so hard as to mark the upper. The jack may swing about the pivot 77 until the wipers bear evenly on the two sides of the shoe. When the sleeve 215 reaches the stop 201 the handle 29 may be swung over for the over-wiping, pressure on the treadle being maintained to keep the wipers in their raised position. If desired, the overwipe may be repeated. A binding wire may be then positioned, the handle 219 being swung to allow the wipers to be raised slightly to allow the wire to be slipped beneath them. The wire is then drawn tight and the right hand end of the treadle depressed to press the binding wire hard against the shoe. the wire being then twisted around its tack and severed. The handle 239 may then be engaged by the operator's knee to release the work and withdraw the jack, when the work may be removed. According to the first Provisional Specification, the over-wipe is effected by power through a friction clutch, the jack is advanced to the wipers by a worm shaft geared to a hand wheel, the shoe clamping handle is retained in operative position by a pawl engaging a ratchet sector, the heel rest is detachably secured by a spring plunger, and, for limiting the rise of the wipers, a limit stop is formed as a flat finger which may be interposed between or swung away from fixed and moving stop members to allow rise to toe level or slightly higher, respectively. Specification 204,507, [Class 17 (i)], also is referred to.