Thermoplastic bellows lid for thermoplastic containers

Details Thermoplastic bellows lid for thermoplastic containers Thermoplastic bellows lid for thermoplastic containers

1988-08-15

1989-11-28

Marcus, Stephen

Receptacles

Receptacle side wall made of two or more layers of material...

Beverage receptacle

B65D 634

Patent

active

048831905

ABSTRACT:
The invention is a thermoplastic lid which utilizes a bellows action to prevent paneling in the thermoplastic container to which it is attached. The lid comprises a flange for attachment to the container and a recessed center portion which has a flex area comprising a raised ridge adjacent to the outer ridge of the center portion. The stiffness of the lid and the thickness of the flex area are no greater than the maximum which will allow the center portion of the lid to flex inwardly sufficiently to provide the minimum displacement of head space necessary to prevent paneling.

REFERENCES:
patent: 2971671 (1961-02-01), Shakman
patent: 3057537 (1962-10-01), Pollick
patent: 3394840 (1968-07-01), Pecci et al.
patent: 3400853 (1968-09-01), Jacobsen
patent: 3437254 (1969-04-01), Bergstrom
patent: 3441170 (1969-04-01), Khoury
patent: 4381061 (1983-04-01), Cerny et al.
patent: 4458469 (1984-07-01), Dunn
patent: 4503990 (1985-03-01), Roth et al.

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