Patent GB-213263-A (GB)
Title: Improvements in or relating to shoe upper conforming machines and methods
IPC: A43D13/00
Filed: 1924-03-19
Abstract: 213,263. United Shoe Machinery Corporation, (Assignees of Jorgensen, B.). March 19, 1923, [Convention date]. Pulling-over. - A pulling-over machine has grippers for engaging the upper at the sides of the last where this curves inwardly toward the shank and automatic means for imparting to the gripper on the inside of the shoe a predetermined twist, and a fore-draw. Similar movements are given to the wipers and tackers with the result that the upper is pulled over, overlaid, and fastened in directions normal to the corresponding edges of the sole. The movements are automatically alternated for successive shoes so that right and left shoes can be dealt with alternately, 'but manual adjusting means is provided in case two like shoes are to he dealt with in succession. The machine shown is of the general type described in Specification 12304/03, but is intended to deal with shoes which have previously been pulled over at the toe end, and is therefore provided with only two pairs of grippers. The shoe rest is cam-actuated as usual, and is provided with a sole rest 4, Fig. 1, on each side of the toe and a gauge member 6 engaging the front of the toe. These parts are adjusted for length of shoe by a handle 18 operating a pinion gearing with a rack on the rest. The shoe is held against the rest by a rubber-covered bar 28 carried by a yoke 26 pivoted to a link 32. This link is operated by arms 36 of a rocking shaft 38 actuated by a treadle to clamp the shoe, and automatically operated at the end of the cycle to release the shoe. As the yoke 26 moves downwards to release the shoe, a pin 48 on the yoke moves along a slot in the gauge 6 to cause the yoke to move forwardly about its pivot to clear the shoe. To give the fore draw, a pair of racks 92, Fig. 5, connected by slides to the gripper casings mesh with pinions on a shaft 82. Duplicate sets of mechanism are provided for rotating the pinions since, as the gripper on the outside of the shoe is not given a fore draw, the pinions are required to be driven alternately. Each set comprises sectors 102, 104 actuated by an arm 130 with a down-turned end adapted to engage a shoulder on an arm 126 pivoted to a bracket 118 on a slide 114 automatically operated during the updraw from the cam shaft of the machine. The arms 126 are supported by a pair of star wheels 136 mounted on the bracket 118 and having their teeth staggered so that the arms are raised and lowered alternately. The wheels 136 are driven by a pawl and ratchet gear half a tooth for each reciprocation of the slide 114. Each gripper is, therefore, given a fore draw in each alternate cycle of the machine, so that the machine is automatically set for right and left shoes in succession. If it is desired to deal with two like shoes in succession, the pawl is operated by hand. The arms 126 operate signals marked " left " and " right " respectively, which indicate, at the commencement of the cycle, the shoe for which the mechanism is set. As the gripper on the inside of the shoe receives its fore drawing movement, a pin 182, Fig. 10, connected to the gripper guide-slide 100 engages a fixed cam plate 180 and twists the gripper into substantial parallelism with the edge of the sole. The wipers and tackers are given forward and twisting movements corresponding to those of the grippers by cam bars 254, Fig. 8. As each wiper and tacker unit moves inward to operating position, a roll 264 on an arm pivoted to the unit at 258 and guided by a slide 260 rides up the cam surface a to cause the unit to follow the path of the grippers. Two cam surfaces of differing slopes are formed on adjacent sides of the bars 254, and these bars are turned through 90‹ during each cycle to set the mechanism for right and left shoes alternately.