Patent GB-341958-A (GB)
Title: Improvements in or relating to machines for operating upon end portions of shoe uppers
IPC: A43D113/00
Filed: 1929-10-25
Abstract: 341,958. Boot-making machines. BRITISH UNITED SHOE MACHINERY CO., Ltd., Union Works, Belgrave Road, Leicester. - (United Shoe Machinery Corp oration; 205, Lincoln Street, Boston, U.S.A.) Oct. 25, 1929, No. 32413. [Class 7 (i).] Lasting.-Relates to machines for forming out-turned flanges around the end portions of shoe uppers, and consists in the combination of wipers arranged to advance and close about the end of the shoe with a shoe support moved heightwise of the shoe to press the out-turned flange firmly against the wipers. A pad at the tip line prevents bowing of the latter under upper-conforming tension. An electric motor 18, Fig. 1, is connected by reducing gearing with a gear wheel 14 adjacent to a cam block 16 adapted to be connected with the gear wheel by a half-revolution clutch. Preferably, the machine is duplicated, a cam block being situated on either side of the gear wheel, so that one shoe may set with the flange under clamping pressure while another shoe is operated on in the other half of the machine. On each clutch are diametrically opposite stops 20, Fig. 4, co-operating with an arm 22 pivoted at 24 and provided with a pin 26 with a flat on one side engaging a notch in a rod 28 pivoted to a treadle 34, Fig. 1. An arm 36, Fig. 4, is forked to be guided on the shaft 12 of the gear 14, and is moved by a roll engaging a cam groove 40 to actuate a toggle 44, 60 for raising and lowering the shoe support. The lower end of the link 44, Fig. 1, is pivoted to a plunger 48 threaded to engage an adjusting nut 50 abutting against a sleeve 52 supported by a strong spring 58 the lower end of which can be raised and lowered by an adjusting handle 59. The upper end of the link 60 engages, by a lost motion connection, a rod 66, Fig. 4, supporting a block 76, the rod being guided to rise with a slight rearward component. An interchangeable sole support 78 engages the top of the block 76 by dowel pins. The block 76 carries a vertical pin 82 er gaged by a draw-bolt 84 to move with some friction. To the upper end of the pin 82 is pivoted a heel support comprising a carriage 104 sliding in guides above a slide 96 having a rack 98 urged rearwardly by a spring 100. The carriage is normally held in adjusted position along the rack by a toothed member 108 depressed into contact with the rack by a spring 110 and raised, when desired by a finger-piece 126. The spring 110 is threaded over a pin the head of which engages a stem 114 to which is pivoted a heel abutment 118. The slide 96 carries a pulley over which is a wire loop also passing over idle pulleys 144 to a clamp 148 resiliently connected with one end of a lever 150, the connection being also to a treadle rod 160 resiliently connected to the treadle 34. A pin 176 on the lever 150 engages a fork in a link 170 pivoted to a fixed bracket. The lever 150 is pivoted at 168 to the rod 66, and beyond this pivot is resiliently connected to a pair of vertical rods 182 the upper ends of which carry clamps 196, Fig. 8, for the margin of the upper To the rods 182 is secured a U-shaped plate 190 engaging the lower ends of rods 214 having bearings formed in the block 76. The upper ends of these rods carry clamps 218, the four clamps all co-operating with the wipers 200, 202 above them. The clamps 196 are swung into and out of operative position about the pivots 178, and the clamps 218 are similarly swung about the rods 214. These movements are produced by a rod 238 pivoted to a lever 242, Fig. 4, actuated by the member 36. The rod 238 is yoked to a shaft 234, Fig. 8, passing through ears on uprights carrying the clamps 196 and connected by links 228 to arms on the rods 214. The wipers 200, 202, Fig. 3, are secured to carriers 252 formed with curved slots to engage fixed rolls as usual and actuated by links 264 and a cross bar 268 having a screwed stem 270 engaging a sleeve 272 provided with a hand-wheel 280 for adjusting the normal position of the wipers. The stem is advanced by a cam-operated lever 288, Fig. 4, and retracted by a spring 284, Fig. 3. The toe clamp 294, Figs. 1 and 4, is backed by a spring and slidablv mounted in a sleeve 302 clamped by a bolt 304 to a bracket 306, the pad being adjustable about the bolt 304. In operation, a shoe which may have had its lining lasted over an insole and a first extension sole secured to the last is positioned on the sole rest with the margin of the sole under the clamps 196, 218 and the margin of the upper above the clamps and under the wipers. The heel rest is then adjusted, if necessary, by manipulation of the hand-wheel 92 to adjust for the spring of the last and by movement about the pin 82 for the swing of the last. The heel rest 118 is then slid toward the shoe to allow the finger-piece 126 to be raised, when the carriage 104 is slid until the rest 118 engages the shoe. The treadle 34 is then partially depresed, the lever 150 turning about the pivot 168 and the carriage 104 moving toward the shoe until an abutment 134 thereon engages the heel support. Simultaneously, the upper-engaging clamps rise to press the margin of the upper lightly against the wipers. If the parts are properly positioned the treadle is fully depressed, the rod 28 actuating the arm 22 to release the stop 20 and start the machine. The toggle 44, 60 is partially straightened, effecting wiping action between the wipers and the shoe and further pressure of the upper-engaging clamps, the lever 150 now moving about the pin 176. The upward movement of the shoe also brings the toe pad into engagement with the work. Just before the initial upward movement of the shoe is complete, the wipers commence to advance, their movement continuing to bed the upper well into the crease at the edge of the last. When the wipers are fully advanced, the upper-engaging clamps having been swung out of the way early in their movement, the shoe support is further raised to apply heavy pressure to the margin of the upper, the wipers being prevented from upward yield by blocks above them. The cam shaft having then made half a revolution, the machine is stopped. The other shoe of the pair may then be treated in the duplicate half of the machine. A second depression of the treadle 34 then restarts the machine to bring the parts to starting position and allow change of work-piece. The machine may be modified to form an out-turned flange about the heel end. The upper-engaging clamps are then omitted, and a toe abutment 402, Fig. 10, adjustable towards and from the shoe by hand, substituted for the slide 96 and carriage 104. A block 414, similar to the block 76, carries flanging plates 438, Fig. 12, arranged to co-operate with the wipers in forming the out-turned flange. These plates are detachably secured by dowel pins to a pair of plates 430 slotted to engage relatively fixed rolls and pivoted at 428 to a slide connected by a rod 424 to a lever actuated bv an additional cam on the cam block. If the shoe to be operated on has a sole attached at the fore part, the sole is bent away from the heel end as shown. The toe pad is replaced by a member 440, Fig. 10, engaging the crown of the last.