Double walled paper cup

Details Double walled paper cup Double walled paper cup

1993-05-03

1994-07-05

Elkins, Gary E.

Envelopes, wrappers, and paperboard boxes

Paperboard box

Box material includes a coating or a nonpaperboard...

220445, B65D 322

Patent

active

053260198

ABSTRACT:
The invention is a paper cup of double walled construction with an air pocket between the walls. The cup may find use in keeping warm beverages warm and/or cold beverages cold for reasonable periods of time. In the preferred embodiment, a spiral band of paper is in connection with both the inner wall and the outer wall. This member keeps the walls apart to create the air pocket and provides structural rigidity. The cup may be made of relatively narrow width with a small air space between the inner and outer walls.

REFERENCES:
patent: 2266828 (1941-12-01), Sykes
patent: 2591578 (1952-04-01), McNealy et al.
patent: 2661889 (1953-12-01), Phinney
patent: 2853222 (1958-09-01), Gallagher
patent: 3082900 (1963-03-01), Goodman
patent: 3141913 (1964-07-01), Edwards
patent: 3456860 (1969-07-01), Janninck
patent: 3908523 (1975-09-01), Shikaya
patent: 4261501 (1981-04-01), Watkins et al.
patent: 4993580 (1991-02-01), Smith
patent: 5092485 (1992-03-01), Lee
patent: 5205473 (1993-04-01), Coffin, Sr.

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