Abstract:
1,114,826. Opening containers. ALUMINUM CO. OF AMERICA. 11 Nov., 1965 [25 Nov., 1964], No. 47982/65. Heading B8D. [Also in Division B3] A pull tab 6, Fig. 1, is attached to a tear strip 4 defined by score lines 3 in the metal end wall 2 of a container by means of a hollow rivet formed, Fig. 12, in both the end 2 and the tab. The container body 1 may be of glass, foil and fibre laminate, or plastics, and the tab may be bendable or of the rigid lever type. During the formation of the rivets the metal of the transverse portions 13c, 1 flows sideways to form interlocking heads 18, 19 (see Division B3), the portions 13c, 14c becoming thinner than the upstanding walls of the rivets in the process.
Abstract:
1,075,437. Extruding; attaching handles. ALUMINUM CO. OF AMERICA. Oct. 8, 1965 [Oct. 12, 1964], No. 42866/65. Headings B3A and B3P. [Also in Division B8] A container is impact-extruded with an integral rivet (12), Fig. 7, by means of a punch (16) having the internal dimensions of the container and a die (15) recessed to receive the punch and with a central cavity (17) to form the rivet. After being stripped from the members (15, 16) the container end is reformed by means of a recessed die (18), Fig. 8, co-operating with a mandrel (19), thereby recessing the container end wall. A scoring die (20) forms a line of weakness, Fig. 9, defining an area in the end wall which includes the rivet, after which. Fig. 10 (not shown), an apertured pull tab is applied over the rivet and the rivet head deformed by a die (22) to secure the tab. The container may be of aluminium or an aluminium alloy containing at least 50% by weight of aluminium.