Method for making film cassettes

Details Method for making film cassettes Method for making film cassettes

1990-08-16

1992-03-24

Simmons, David A.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156196, 156216, 1562751, 1562753, 156290, 156291, 156324, 29806, B65B 700, B32B 3100

Patent

active

050984926

ABSTRACT:
In an improved embodiment, film cassettes comprising a substantially cylindrical casing, a film mouth of an upper lip and lower lip extending over the width of the casing, a film spool and end caps, the upper lip and lower lip of the film mouth being provided with sealing strips, contain the sealing strips for the lower lip bonded to the metal in such a way that the edge zones of the sealing strip on the narrow sides and the edge zones of the sealing strip on the longitudinal side are completely bonded to the metal on the lower lip while the edge zone of the sealing strip on the longitudinal side is completely or partly bonded to the metal inside the cassette and all or part of the inner region of the surface of the sealing strip is not bonded to the metal, so that 10 to 60% of the total surface area of the sealing strip is not bonded to the metal strip.

REFERENCES:
patent: 2114353 (1938-04-01), Powell
patent: 3261237 (1966-07-01), Sentiff
patent: 4106420 (1978-08-01), Takahashi et al.
patent: 4614019 (1986-09-01), Shimizu et al.
patent: 4867815 (1989-09-01), Hoffacker et al.
patent: 4891089 (1990-01-01), Takahashi et al.

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