Insulated paper cup

Details Insulated paper cup Insulated paper cup

1991-12-10

1992-09-08

Elkins, Gary E.

Envelopes, wrappers, and paperboard boxes

Paperboard box

Box material includes a coating or a nonpaperboard...

220468, 220469, 229 45, B65D 322

Patent

active

051451077

ABSTRACT:
An insulated paper cup having inner and outer frustoconcial shells, the inner shell being more tapered than the outer shell. The upper rims of both shells are outwardly curled and joined together. The outer shell has a recessed bottom upon which the bottom of the inner shell rests. The inner surface of the inner shell is coated with a plastic film such as polyethylene.

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patent: 3580468 (1971-05-01), McDevitt
patent: 4007670 (1977-02-01), Albano et al.
patent: 4040537 (1977-08-01), Edwards

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