Method of manufacturing a container cap with a concealed mark

Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor

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Details

53129, 156262, 156277, 215230, 215253, 215341, 413 9, 428 43, 428 64, B32B 3120

Patent

active

046844260

ABSTRACT:
A method of manufacturing a container cap with a concealed mark is disclosed. The mark is provided to the central portion of one of both the inside face of the top panel and one side of a seat member made of a thermoplastic material. The seat member is then placed on the inside face of the top panel so that the one side of the seat member faces the inside face of the top panel. The seat member is thereafter heated for softening. The other side of the seat member, heated and placed on the inside face of the top panel, is depressed to form a manually tearable line surrounding the mark in the other side of the seat member, thus defining a gasket portion in the seat member outside the tearable line and a manually removable portion, overlying the mark, inside the tearable line, and to attach a gasket portion to the top panel.

REFERENCES:
patent: 3004297 (1961-10-01), Stover
patent: 3037474 (1962-06-01), Navikas
patent: 3344093 (1967-09-01), Strickman
patent: 3361281 (1968-01-01), Kehe
patent: 3547746 (1970-12-01), Gwinner
patent: 3581690 (1971-06-01), Zapata
patent: 3616954 (1971-11-01), Peck
patent: 4272313 (1981-06-01), Mori et al.

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