Venting/opening for paperboard carton

Details Venting/opening for paperboard carton Venting/opening for paperboard carton

1993-05-28

1995-07-18

Shoap, Allan N.

Envelopes, wrappers, and paperboard boxes

Paperboard box

With closure for an access opening

229120, 2291232, B65D 542

Patent

active

054333741

ABSTRACT:
A venting/opening means for an ovenable carton having a separate lid with venting and opening instructions printed on one corner, and a tray with a continuous peripheral flange. The improvement wherein the venting/opening means is applied to each corner of the tray flange for polygonal shaped cartons having side walls of equal length, or to designated diagonally opposed corners of trays of rectangular shape so as to provide a venting/opening means under the printed instructions on the lid notwithstanding how the lid is oriented on the tray. The venting/opening means takes the form of partial depth cut lines, cut score lines or the like arranged diagonally across the corners of the tray flange. These cut lines provide corner tabs which may be separated from the tray flange to allow the tray to be opened by fracturing the portion of the tray flange outboard of the cut lines and first partially lifting the lid to vent the carton, and then finally opening the carton by lifting the lid completely off the tray.

REFERENCES:
patent: Re29705 (1978-07-01), Compere
patent: 3863832 (1975-02-01), Gordon et al.
patent: 4091930 (1978-05-01), Buchner et al.
patent: 4183458 (1980-01-01), Meyers
patent: 4531688 (1985-07-01), Forbes, Jr.
patent: 4871071 (1989-10-01), Zimmermann
patent: 4955530 (1990-09-01), Rigby et al.
patent: 5090615 (1992-02-01), Hopkins et al.
patent: 5244145 (1993-09-01), Forbes, Jr.

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