Patent GB-708531-A (GB)
Title: Improvements in or relating to machines capable of breasting shoe heels
Inventor: MAWBEY LAWRENCE
IPC: A43D87/00
Filed: 1951-01-23
Abstract: 708,531. Heel-breasting machines. BRITISH UNITED SHOE MACHINERY CO., Ltd. Jan. 22, 1952 [Jan. 23, 1951], No. 1692/51. Addition to 634,015. Class 17(1) Various modifications are made in the machine described in the parent Specificacation with a view to (1) adjusting the angle relatively to the tread face at which the breast face is cut, (2) facilitating' locating the heel blocks in the machine for the breasting operation, and (3) removing from the machine material cut from the breast face. The rotary work carrier 29, Figs, 2, 3, 7, (to different scales), receives at the loading station from the operator a heel block to. be operated on and it is then positioned, by engaging its breast face which is directed towards the centre against a single locating gauge plate 165, Fig. 3, and carried round on the carrier 29 in this position through 180 degrees, i.e. for one revolution of a counter shaft 27, Fig. 2, beneath a breasting knife 273, Fig. 3, at the rear of the table, which knife moves downwards at an angle which is adjustable relatively to a wooden block 159, Figs. 2, 3, which forms the work supporting surface of the carrier and which remains horizontal. The knife 273 is supported in a slide 275, Fig. 3, movable to and from the carrier 29 in guides in a member 277 adjustable along an arcuate guide 279, Fig. 2, in the machine, the guides being concentric about a line which passes through the centre of the knife edge where it intersects the heel-supporting face of the block 159. This line also lies tangential to the path of rotation of the block 159 which is adjacent to the centre portion of the knife. The heel is clamped in position by two holding plates 71, Figs. 3, 7, which are set, by means of a nut 115, Fig. 7, to a spacing which just permits the passage of a heel between them. Pins 73, Figs. 3, 7, on the plates 71, on the first part of a downward movement of a treadle by the operator, engage the heel at opposite sides. They are carried on a pair of arms 67, 69, Fig. 7, which project upwardly through a recess in the edge of the carrier 29, one being at the loading station when the other is at the breasting station. Further depression of the treadle causes the breast gauge plate 165 to be moved rearwardly by a rod 191 and, on further depression of the treadle, the clutch is closed and the carrier 29 is turned by power through 180 degrees, during which a stop pawl 365 (not shown), for preventing overthrow of the table 29 beyond its stopping position and the plates 71 are moved downwards by the springs 115 to cause the heel to be pressed against, the block 159. When the heel has reached the breasting station, thrust members 327 are permitted by a cam 347 on the countershaft 27 to engage recesses 329 in a bar 331 so that, during the second rotation of the driving shaft 21, the knife 273 is operated to breast the heel. Trimmed material may fall inside a sleeve 31 of the carrier 29. In the next machine cycle and just before the heel reaches the ejecting station, the plates 71 are caused to release the breasted heel so that, when the station is reached, a knock-off member 253 may send it into a shoot formed in a bracket 183 from which it passes to a receptacle on the floor. Two spring-pressed arms, pivoted on arms 383 (not shown), to the knife bracket 229, which operate the knife, are urged rapidly forward as the knife descends to remove any article which may be lying on the table in their path. Specification 642,008, [Group VIII], also is referred to.