Patent GB-703358-A (GB)
Title: Improvements in or relating to machines adapted for performing a marking and/or cutting operation on shoe parts
IPC: A43D27/00
Filed: 1950-09-06
Abstract: 703,358. Marking shoe upper blanks. BRITISH UNITED SHOE MACHINERY CO., Ltd., and BOOT, H. W. Sept. 5, 1951 [Sept. 6, 1950], No. 21920/50. Class 17(1) [Also in Groups VIII and XVI] In a machine for performing cutting- out, punching, and marking or embossing operations on shoe parts e.g. upper blanks, comprising a tool-carrying plunger 33, Fig. 1, reciprocable by power-operated means towards and away from a work table 1, the table is movable manually from a forward work-receiving position to a rearward operative position, and a treadle is operable' to move the plunger to a predetermined position just above the work table, a second treadle being operable for engaging a clutch to initiate operation of the power-operated means, and, if the work table is not in its operative position, an abutment member 303 on an arm 301 engages a fixed abutment member 305 to prevent the plunger 33 from being moved to its predetermined position. When the work table is moved into operative position, a block 311, carried by one of two channel members 3 supporting the work table, moves the arm 301 to an inoperative position so as to permit movement of the plunger 33 to its predetermined position. When the plunger approaches the work table, a spigot 309 on the arm 301 .enters a bore 313 in one of the channel members 3 so as to lock the work table in its operative position. The workpiece is located in a central opening in a plate 23 which is retained on the work table in spaced relationship thereto by means of spring clips 31. The plate 23 may have an auxiliary plate 27 secured thereto. The work table has secured thereto a bracket having depending arms 139 with which are associated means for supporting a roller 157 on which is carried a roll 135 of paper backing material for the workpiece. Rearward and forward movement of the work table are limited by pins 17 and 21 engaging fixed pins 19. A cutting and marking assembly 41 is supported on the plunger 33 by means of studs 43 extending from the assembly into sockets in the punger, the studs being retained in the sockets by means of a plunger 45 which is moved rearwardly when it is desired to release the assembly from the plunger 33. A wedge member 47 is provided for adjusting the height of the plunger 33 to suit assemblies of different deaths, and to prevent rearward movement of the plunger 45 to release the assembly, unless the wedge member is at the forward limit of its travel, a rearward conical end portion of a screw. 49, for adjusting the wedge member, overlies an upper surface of a vertically slidable plate 51 formed at its lower end with a poppet 53 above a restricted portion 55 of the plunger 45, a bale 57 being disposed between the poppet and the plunger 45. The assembly 41 comprises upper and lower plates 61, 63 respectively, the lower plate having secured thereto a plate 73 carrying perforating members 71 and one or more cutting blades 75. The workpiece is stripped from the perforating members by means of a spring-influenced plate 77. This plate has formed on its underside marking members 93 which are inked, prior to the assembly being moved down to a workpiece, by means of an inking roller 101 carried by the work table. This roller is freely rotatable on a shaft having eccentrically-mounted end portions 111 received in bores in arms 113 of pivotallymounted spring - influenced bell - crank levers. One end of the roller shaft carries a spring-influenced knob by which the shaft may be rotated to raise or lower the roller relatively to the arms 113. The knob is provided with apertures 121 a selected one of which is occupied by a fixed pin in the arm 113 of the adjacent bell-crank lever to hold the shaft in adjusted position. The assembly 41 may be replaced by a die assembly for embossing using embossing strip, Figs. 3 and 4 (not shown), or using heat alone. Specifications 525,288, 527,069, and 682,012, [all in Group VIII], are referred to.