Patent GB-450167-A (GB)
Title: Improvements in or relating to methods of and machines for use in manufacturing pre-welted boots or shoes
IPC: A43D21/12
Filed: 1935-01-14
Abstract: 450,167. Boot - making machines. UNITED SHOE MACHINERY CORPORATION, 140, Federal Street, Boston, U.S.A.- (Assignees of Engel, K. ; Swampscott, Massachusetts, U.S.A.) Jan. 14, 1935, No. 1180. Convention date, Jan. 30, 1934. [Class 17 (i)] Lasting; sole-laying.-A machine of the bed-lasting type is adapted to last pre-welted shoes, and is provided with mechanism by which, after lasting, and while the welt is still supported by the wipers, an outer sole may be stuck on to the shoe. End and side wipers are provided, and, at the ends of the shoe, groups of resilient fingers engage the inside of the upper margin and the face of the welt to co-operate with the wipers in holding the margin of the upper. The welt is positioned on the wipers while they are in retracted position, a last is inserted and pressed down by a member engaging its forepart. The wipers are then advanced, and when the lasting is complete, the surfaces are cemented and a sole pressed into place. When an insole and filler are provided, the edge of the filler and the exposed margin of the insole are coated with cement prior to the lasting. The wiping mechanism is of the kind described in Specification 22630/08, [Class 17], having toe-end wipers 40, Fig. 4, and heel-end wipers 42, but the latter carry side wipers 44, 45, each adjustable for length of shoe, a clamping screw 50 co-operating with a guide 46 provided in each heel end wiper. The toe head is adjustable longitudinally of the shoe as usual, and is provided with a scale 58 moving with the head, graduated in sizes, and co-operating with a fixed pointer 60. The fingers 64, 124, Fig. 7, at the heel end are carried by a lever 72 pivoted at 82 to an arm 74 pivoted at 76 to the heel head and provided with an arm 102 normally urged clockwise by a spring 100 to retain the fingers in out-of-the-way position. A spring 88 urges the lever 72 clockwise to a limit determined by an arm on the lever co-operating with a pin on the member 74, and a second arm 96 co-operates with a turn-button 98 to retain the lever in the position shown. A hold-down 174 secured to the lever 72 determines the height of the last relatively to the wipers 42, and an adjustable stop 122 determines the operative position of the arm 74. The arm 102 is actuated by a slide connected to a treadle 104, Fig. 5, having a ratchet 123 engaging a pawl 125 for holding the treadle depressed, a tail 127 on the pawl enabling this to be tripped. The fore part of the last is supported by a lasting apron 188, Fig. 6, carried by brackets on a toe post 192 adjustable longitudinally of the last and resting on a member 198 adjustable vertically by a hand wheel 201 in a slide 200 vertically movable by a link 236 connected to a treadle 162, Fig. 5. A pawl 231 engages teeth on a rack 230 to hold the treadle depressed, and may be freed by a knee pad 235. The heel end of the last is supported by a post urged upwardly by a spring 158, Fig. 13, and provided with a cross bar 169 co-operating with a link 165 having a lost-motion connection with the treadle 162. The fingers 136 150, Fig. 9, for the forepart are carried by a member 134, of U-shape having a shank slotted to engage a pivot carried by ears 142 projecting from the toe head. A spring 144 urges the assembly to out-of-the-way position, and a handle 248 brings the assembly into operative position determined by a stop 135, a spring 137 retaining it there. On the same pivot is a last depressor 178 actuated by a handle 182 and provided with a stop 184 for determining the relative position of the last and wipers, and therefore the lasting allowance of the upper. The fingers at the toe end slope so that the last, as it is pushed down into the upper slides rearwardly a resilient abutment 180, Fig. 13, at the heel end yielding somewhat to allow this movement. The depressor 178 is for a last with no insole thereon. For a thick insole, the depressor is provided with a plate 252, Fig. 26, with a flange 254 shaped to engage the edge of the insole and providing clearance for a filler. A strip 264 on the plate is bent to form a bearing engaging a pin 258 held in normal position by a spring 270 but capable of withdrawal to allow change of plate. A spring 268 engages the rear part of the strip to ensure the plate engaging the last substantially parallel therewith. For a thin insole another modified member is used, comprising fingers 280, Fig. 30, mounted on a plate 278 connected to the hand lever by screws 290 engaging slots in a member 286 carrying a pivot arranged near the last. For attaching a cemented sole to the lasted upper a shaped pressing pad 210, Fig. 5, is carried by a rod slidable through a bracket 214 pivoted on a rod 216, the bracket being normally urged by a spring 218 so that the pad is in out-of-the-way position. A pin 222 on the rod co-operates with a spiral groove in the bracket so that the pad descends as it is swung manually over the work. For depressing the pad on to the work the rod 216 is linked to the treadle 162. In operation, the wipers being in their retracted position, the operator positions an upper with its welt overlying the edges of the wipers. The treadle 104 is then depressed to swing the arm 74 downwards and the handle 246 used to swing the heel end fingers downwardly into the supported upper, the turn-button 98 locking the handle in this position. During this swing the fingers engaging the sides of the heel end of the upper are pressed inwardly by engagement with fixed cams, to facilitate their entry into the upper. The toe end finger assembly is then swung downwardly by the handle 248, the spring 144 drawing the assembly forwardly when the fingers have been swung down. The treadle 162 is then depressed to draw the heel post downwardly, and a last is inserted into the upper. Preferably, the heel and shank wipers may be retracted beyond their normal inoperative position to facilitate the insertion of the last, a spring yield being provided to allow retraction by the usual handle. The heel post is then released to bring the heel end of the last up to the finger 174. Whichever depressor is in use is then actuated to depress the fore part of the last into operative position, the toe end of the last sliding down the inclined fingers at the toe end and moving rearwardly into the upper; The wipers are then partially advanced by their usual handles, the fingers are returned to initial positions, and the wipers are fully advanced. A bottom filler may then be placed on the last bottom, cement previously applied to the necessary surfaces activated and a sole applied to the welt and filler. The pad 210 is then swung over the work, and the treadle 162 depressed to exert the necessary sole-laying pressure. The pad is then released by the knee pad 235 and the wiper plates retracted, the shoe being then lifted by the member 188 and the spring 158 to a position convenient for removal.