Package making – Methods – Forming or partial forming a receptacle and subsequent filling
Patent
1985-03-15
1986-01-07
Price, William
Package making
Methods
Forming or partial forming a receptacle and subsequent filling
53477, 53491, 493129, 493134, 493162, B65B 4310
Patent
active
045626901
ABSTRACT:
A package blank is made from a single sheet having at least surface layers of heat-sealable material. The blank sheet comprises first and second rectangular panels foldably formed on opposite sides of a backstrip. The first and second panels have first and second pairs of foldable side flaps, respectively, extending from their opposite sides, and the backstrip has a pair of foldable back flaps extending from its opposite ends. The first side flap pair and the back flap pair have sloping edges located adjacent each other for forming at least partly overlapping seams when the blank is folded up into a generally boxlike, open-front package. The overlapping seams serve to prevent the intrusion into the package of heated air used for fusing the second side flap pair onto the first side flap pair and the back flap pair. At least either of the first side flap pair and the back flap pair is at least partly reduced in thickness to minimize the thickness of the overlapping seams and hence to avoid the surface irregularities of the overlying second side flap pair.
REFERENCES:
patent: 3120727 (1964-02-01), Ziliox
patent: 3777448 (1973-12-01), Howe
Dai Nippon Insatsu Kabushiki Kaisha
Elkins Gary E.
Price William
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