Envelopes – wrappers – and paperboard boxes – Paperboard box – Nonunitary – peelable closure or securing element
Patent
1988-05-02
1989-05-16
Elkins, Gary
Envelopes, wrappers, and paperboard boxes
Paperboard box
Nonunitary, peelable closure or securing element
220265, 220288, 220359, 222541, 22912508, 22912515, 22912542, 2291602, B65D 3908, B65D 4316
Patent
active
048302732
ABSTRACT:
A paperboard carton for containing and pouring liquid has a pour spout fitment adhesively secured to its upper surface and at least partially over a reinforcing patch on said upper surface to spread the upward force exerted by opening the fitment over an area of the carton surface larger than the bottom surface of the fitment so as to prevent the fitment from being torn away from the carton surface. In addition to the force distribution, the tensile strength of the added patch material is much greater than the strength of the carton coating, thus this new patch material becomes the primary seal.
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patent: 4715528 (1987-12-01), Kjelgaard et al.
patent: 4770325 (1988-09-01), Gordon et al.
Gordon Robert L.
Kalberer Roderick W.
Elkins Gary
International Paper Company
Zielinski Walt T.
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