Patent GB-537371-A (GB)
Title: Die
IPC: A43D95/14
Filed: 1939-09-16
Abstract: 537,371. Cutting dies. FREEMAN CO., L. G. Sept. 16, 1939, No. 26008. Convention date, Oct. 18, 1938. [Class 31 (ii)] A die for ornamenting shoe uppers by making perforations and impressed markings thereon comprises a part on a fixed base and a part on an adjustable sub-base and attachable thereto in a readily releasable manner. In the construction shown the work is received in an opening 62 in a gauge plate 60 supported on a plunger C moving up and down towards the die carriage A which moves horizontally in the intervals between the operative strokes of the plunger for removing and replacing the work. The die carriage A is of hollow construction comprising a heavy base plate 18 connected by struts 15 to a top plate and has a pressure plate 16 which is movable in slots in the end walls against the action of heavy springs 19 and carries a series of headed studs 17 movable in openings in the base block 18 and held by the springs with their ends flush with the face of the block. The die unit B comprises a section D rigidly fixed by pivoted latches 30 to a base plate 22 detachably secured to the base block 18 and a section E secured by latches 43 to a sub base plate 38 slidable in guides 26 on the base plate 22 and adjustable towards the die section D by means of a pivoted lever and link 49, 50 locked by a notched arcuate plate 51 and pawl 52. As shown in Fig. 7, the fixed die section D is of hollow construction made up of a die plate 27 connected by sleeve parts 28 to a plate 29 secured to the base plate 22 by the latches 30; a marking die consisting of a plate 34 carrying printing or marking ribs 35 is resiliently and removably mounted on the die section D by means of studs 36 extending through holes in the plates 27, 29, 22 and engaged by light springs 37, these studs in the operation of the machine being clear of the ends of the studs 17 on the spring supported plate 16 so that the marking elements 35 will contact the work in a yielding manner. The die plate 29 may, if desired, be equipped with a tube or cutter plate for making perforations. The adjustable die section E is of hollow construction similar to the section D and comprises a die plate 39 connected by sleeve struts 45 to a back plate 44 which is secured to the sub base plate 38 by the latches 43 and a cutter or tube plate 40 carrying a number of tubes or cutters 42 and detachably mounted on the die plate 39 by pivoted latches 41. Another marking plate 46 with marking ribs 47 is resiliently and detachably secured to the die section E by slidable studs 48 which are resiliently mounted and in the operation of the machine are clear of the studs 17 so that these markers also contact the work in a yielding manner. As the operation continues, the rigidly supported perforating cutters 42 project through holes in the marking plate and perforate the work ; when the operation is completed and the work support C descends, the marking plate 46 acts as a stripping plate through contact of the studs 48 with the pins 17 on the plate 16 influenced by springs 19 to strip the work off the perforating cutters 42. Fig. 10 shows a work gauge co-operating with the die section D and comprising a thickened part 64 adapted to enter the opening 62 in the plate 60, the shouldered edge 66 abutting the upper edge of the opening. The upper part of the gauge has notches 72, 73 engaging locating projections 70, 71 and is locked in position by a sliding bolt 74 actuated by a cam lever 75 to engage a third notch 76. The base plate 22 and sub base plate 38 are provided with large perforations to permit passage of the studs 36, 48 into the base block 18 beneath the pressure applying studs 17. Specification 531,468 and U.S.A. Specification 2,183,038 are referred to.