Eighteen cell hinged-cover carbon thermoformed from plastic shee

Details Eighteen cell hinged-cover carbon thermoformed from plastic shee Eighteen cell hinged-cover carbon thermoformed from plastic shee

1985-04-16

1986-12-02

Price, William

Envelopes, wrappers, and paperboard boxes

Wrapper

Bottle

229 29M, 229 44EC, B65D 8532

Patent

active

046259066

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 plastic into the cover and cell section extensions.

REFERENCES:
patent: 2285129 (1942-06-01), Schwartzberg
patent: 3145895 (1964-08-01), Reifers
patent: 3469764 (1969-09-01), Gaylor, Jr.
patent: 3471078 (1969-10-01), Seest et al.
patent: 3568916 (1971-03-01), Scheuring
patent: 3570747 (1971-03-01), McKenna
patent: 3610515 (1971-10-01), Voorhis
patent: 3672560 (1972-06-01), Voorhis et al.
patent: 3865299 (1975-02-01), Crabtree
Plastics, vol. 38, Machine Design, Jun. 16, 1966, Ch. 3 by George Carlyon, pp. 20 and 21.

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