Method for protecting metal ends

Details Method for protecting metal ends Method for protecting metal ends

1974-05-13

1977-04-05

Hoag, Willard E.

Coating processes

Nonuniform coating

Metal, glass, or ceramic base

264135, 264259, 264265, 264294, 264311, 427292, 427388R, 427310, B29C 2500, B29D 908, B29F 500

Patent

active

040163113

ABSTRACT:
A protected easy-open metal end for containers is disclosed that contains a scoreline which defines on the central portion of the end a removable panel portion and a residual lip portion. A layer of synthetic resin hot melt material is deposited on one of the central panel surfaces opposite the scoreline, whereupon after the hot melt is solidified, the end is post heated to effect softening of the hot melt so that the metal end surface is wetted thereby. The resultant bond between the hot melt and the metal end is so great that severing of the removable panel from the end effects corresponding severing of the hot melt layer to provide protective hot melt layers on the edges of each of the panel and the residual lip portions. The hot melt layer may be applied to the same or the opposite central panel surface that contains the scoreline, or on both surfaces to provide two-side protection.

REFERENCES:
patent: 732021 (1969-09-01), Lowe et al.
patent: 3506472 (1970-04-01), LaBombarde et al.
patent: 3510022 (1970-05-01), Heller
patent: 3696961 (1972-10-01), Holk
patent: 3754678 (1973-08-01), Fox et al.
patent: 3765561 (1973-10-01), Hekal et al.
Skeist, I., Handbook of Adhesives, Reinhold, N.Y. (1962) pp. 6, 447-450.

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