Patent GB-995844-A (GB)
Title: Method and machine for making and applying discs of foil
Inventor: CAPP DEREK JAN
IPC: B65B61/22
Filed: 1961-01-11
Abstract: 995,844. Foil-cutting machines. FORDS (FINSBURY) Ltd. Jan. 10, 1962 [Jan. 11, 1961], No. 1187/61. Heading B4B. A machine for applying foil discs to open tins 2 containing tacky substances such as boot polish comprises a plunger 42 arranged to releasably hold a strip 6 of foil which is fed intermittently from a roll 7, a cutting blade 90 rotatable in a circular path, and means to advance the plunger and cut-out disc to a position where the disc is released on to the tin. The strip 6 is intermittently fed to a position under the plunger 42 from a roll on a cylinder 19 by feed rolls 8, 9 which are driven through pawl- and-ratchet mechanism 27, 28 from a driver shaft 24. The mechanism 27, 28 also drives tensioning rolls 13, 14 which are disposed on the far side of the plunger and driven at a greater speed than are the rolls 8, 9. The cylinder 19 is provided at each end with projecting pins 21 engaging on the opposite sides of an inclined support bar 20 to allow the roll to slide downwardly as the foil is unwound. The plunger 42 is secured to a rod 43 which is slidable vertically under the control of cam and link mechanism 65, 68 from the shaft 24, and in such movement the plunger slides into and out of a recess of a spring-urged outer plunger 44 which is itself slidable within an enclosing casing 41. The recessed underface of the plunger 42 communicates with a passage 49 in the rod 43 and is filled with a perforated work-engaging pad 54. While in cutting position, the foil is supported by a resiliently-supported annular member 77 arranged to co-operate with a similar member 79 disposed in the underface of the outer plunger 44. The cutting blade 90, which is disposed beneath the plunger, is secured to the inner periphery of an annular carrier 89 arranged for rotation by one of four supporting wheels 92 engaging in a peripheral groove of the carrier; the driving wheel is provided with a rubber tyre and rotated by a motor-driven belt 96 and pulley 95. After the strip of foil has been advanced, depression of the plunger 42 by the cam 65 results also in downward movement of the outer plunger 44 so that the foil is gripped between the members 77, 79; as soon as the pad 54 makes contact with the foil a cam 100 so actuates the control valve 98 of a pump 99 that suction is applied to the workengaging surface of the pad 54 through a gland 58 surrounding the rod 43. Continued downward movement of the plunger assembly causes the foil to be brought into the path of the blade 90 which rotates in a circular path to cut a disc. The downward movement of the outer plunger is then stopped and the plunger 42 passes through the annular member 77 and blade carrier 89 to the end of its stroke, whereupon the cam 100 is actuated to cut off the suction from, and if desired apply air pressure to, the pad 54 to deposit the disc. The plungers are then restored to their original positions under the action of springs 45, 71 and the next tin is conveyed to the machine ready for the next operation. In a modification, the blade carrier 89 has a toothed periphery for drive by a gearwheel. The Provisional Specification described also the cutting device as being moved upwards into contact with the foil for a cutting operation.