The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 24, 1995
Filed:
Oct. 26, 1993
Robert L Gordon, Monroe, NY (US);
David E Stier, Middletown, NY (US);
Other;
Abstract
A gas barrier folding carton formed from a unitary paperboard blank (10) having a gas impermeable polymer layer (52) such as EVOH, nylon, or foil extruded on or laminated to one surface of the blank, except for certain adhesive (56, 58) coated areas. Two opposite side edges of the blank are seamed to form a flattened tube (13) having top and bottom closure flaps (30, 34, 36, 38, 40). One of the major closure flaps (36) at each top and bottom container end is provided with spaced abhesive areas (58), with areas of the two minor closure flaps (34, 38) also provided with abhesive (56). Upon folding the closure flaps at each end, the folding sequence pulls the barrier film (52) away from the abhesive (56, 58) areas and subsequent heat sealing produces hermetic sealing of the carton. This process and carton construction may be employed with conventional gas purging of the container interior by an inert gas before final sealing.