GB667301A - Improvements in or relating to machines for blanking and forming bottle caps - Google Patents

Abstract

667,301. Forming and shaping apparatus. FORD, G. E., and FORDS (FINSBURY), Ltd. July 12, 1950 [July 27, 1949], No. 19803/49. Class 100 (ii). In a bottle cap-making machine as described in Specification 646,552 wherein a bottle cap is stamped out and formed from a strip 4 of foil by a punch assembly 3 and a die assembly 2, the assembly 3 includes an annular shearing ring 12 and a cap-forming punch 17 which is carried on a plate 9 mounted by readily releasable screws 16 over an aperture 11 in the wall of the machine, so that the punch 17 may be readily removed outwardly through the aperture without affecting the setting of the shearing tools. As shown, the wall 1 has a boss 13 carrying the shearing ring 12. The plate 9 has a spigot 10 for location in the aperture 11 and also carries a member 18 for embossing the lettering on the cap. A spring- loaded ejector ring 21 surrounds the punch 17. The die assembly includes a fixed cylinder 27 in which a plunger 28 is moved by a link 29. In operation, as the plunger 28 advances, a spring- loaded ring 39 first clamps the foil against the shearing ring 12 and then a spring-loaded ring 42 clamps the foil against the punch 17. A shearing member 33 then co-operates with the shearing ring 12 to stamp out the cap and further movement of the member 33 causes it to press back the ejector ring 21 and to form the cap about the forming punch 17. The inner surface of the shearing member 33 thus serves as the forming die. A rubber pad 38 presses the cap against the embossing member 18. Upon retraction of the die, a spring 24 forces ejector ring 21 forward to eject the cap into a shoot 45. Should caps jam up in the machine, the punch is pushed back against strong springs surrounding the shanks of screws 16 to prevent damage to the punch or die.