Thermoforming eighteen-cell hinged cover carton from plastic she

Details Thermoforming eighteen-cell hinged cover carton from plastic she Thermoforming eighteen-cell hinged cover carton from plastic she

1985-02-11

1986-12-02

Anderson, Philip

Envelopes, wrappers, and paperboard boxes

Wrapper

Bottle

229 25EC, 229 44EC, 264155, 264156, 264321, 425291, 425398, 425817R, B65D 4322, B29C 5108, B29C 5132, B29C 5502

Patent

active

046259074

ABSTRACT:
An egg carton thermoformed from a plastic sheet has a cover extension and a cell section extension formed by stretching the plastic sheet in the opposite direction from the sheet line from the direction in which the cover and the cell section are formed. Latching elements on these extensions lock the egg carton without the need for a latch flap. This permits the eighteen cell carton to be loaded on conventional egg loading machinery. The mold for forming the carton has formers which mate with cavities to stretch the lastic into the cover and cell section extensions.

REFERENCES:
patent: 3968921 (1976-07-01), Jewell
patent: 4143111 (1979-03-01), Irwin
patent: 4304747 (1981-12-01), Lake
patent: 4419068 (1983-12-01), Congleton
patent: 4463894 (1984-08-01), Daines

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