Patent GB-681374-A (GB)
Title: Improvements in or relating to apparatus for pressing or blanking articles from strip material
IPC: B21D43/02
Filed: 1949-10-11
Abstract: 681,374. Pressing or shaping bottle caps &c. TAYLOR, H. C. Oct. 11, 1950 [Oct. 11, 1949], No. 26127/49. Class 100 (ii). Apparatus for pressing articles, such as bottle caps, from strip material comprises a press tool having two parts, driving means to impart movement to those parts both in a direction towards and away from one another and in a direction along the length of the strip, and resiliently yielding gripping means auxiliary to and moving with the press tool parts arranged to grip the strip during the pressing operation and release it at a predetermined time after the separation of the press tool parts, whereby the required length of the step by step feed of the strip may be obtained. The metal foil strip is fed from a reel 10 rotatably mounted on a spindle 11 fixed to a bracket 12 extending up from a main casing 13, the foil passing over a roller 17 on a lever arm 18 pivoted at 19 to a member 20 on the bracket 12, the arm 18 being supported by a spring 21 to even out the pull of the step by step feed. The foil passes between lubricating wicks 22, fed from reservoirs 23, which frictionally hold the foil between the feeds, then over a roller 26 with a casing 28 which surrounds the press tool parts and may have a transparent cover. The press tool parts 44, 50 are carried by a casting 38 which is rotatably and adjustably mounted on a side wall of the casing 13 and held in a number of positions by clamping screws so as to be adaptable to different machines using the formed caps. The press tools are driven from an arm 39 of a crank shaft 34 carried in a bearing 37 and recess of the casting 38, the shaft 34 being driven from a motor 29 through a cross shaft 30, gearing 36 and an automatic one-revolution type clutch 35. A crank pin 40 projects from arm 39 into a bearing 41 adjustably mounted, by set screws 83, 84, in a slide 42 which carries the press tool part 44 on an outwardly extending arm 43. The slide 42 is mounted in a slideway 45 which is provided with a transversely extending slide 46 mounted in a slideway 47 fixed to the casting 38, the slide 46 carrying the other part 50 of the press tool on a support 48. Movement of the slides 42, 46 imparted by the pin 40 causes both tool parts 44, 50 to move in the direction of slideway 47, while the part 44 also moves toward and away from the part 50 in the direction of slideway 45. The foil extends across a plate 51 carried by the support 48 and is gripped by a member 52, resiliently and adjustably mounted on arm 43 to move down with the press tool 44 and grip the foil during the pressing operation. The member 52 has pins 54 and a central rod 55 projecting through a part 85 on arm 43, the rod 55 having an adjusting nut 56 and lock nut 57 and being encircled by a spring, the adjustment determining the time of gripping and the length of feed of the foil. The punched strip and formed caps pass out through a gap 59 in the casing 28, the foil strip passing over a guide rod 60 and the caps into a shoot 81. Cupping.-The upper press tool 44 comprises an embossing member 61, an annular cutter 62, an ejecting member 63 within the cutter and a stripping ring 64 pressed by a compression spring 65, the member 63 and ring 64 being located by pins 66 passing through slots in the cutter 62 and the cutter held in the arm 43 by a hollow plug 67 screwing into the cutter. A bolt 69 engaging the member 61, passes through a sleeve 68 which screws into the plug 67 so that the member 61 is adjustable. The lower press tool 50 comprises a cap forming element 70, with a resilient pad 71 co-operating with the embossing member 61, encircled by a ring 72 resiliently mounted on pegs 73 on a plate 74 which rests on a spring 75. A hollow post 77, having a keep 76 for the spring 75, is secured to a bolster 86 secured to the support 48, a bolt 78 through the post 77 engaging the cap-forming element 70. A cutting ring 79 encircling the pressure ring 72 is fixed to the bolster 86 by set-screws 80. When the parts 44 and 50 engage, the cutter 62 passes into the ring 79 to cut the strip and the bottom of the cutter 62 engages the ring 72 to hold the disc while it is drawn downwardly over the cap forming element 70. The formed cap is ejected by the ring 72 when the upper tool rises and ejected from the upper tool by the member 63, the waste foil being stripped from the cutter 62 by the ring 64.