B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
156/27, 190/81
B65B 7/20 (2006.01) B65B 7/28 (2006.01)
Patent
CA 1208144
ABSTRACT OF THE DISCLOSURE A hermetically sealed container comprising a container body of paperboard material, the container body being of rectangular section with a front panel, a rear panel and two side panels. The panels have level top edges, with a strip of thermoplastic material extending around surfaces of the panels adjacent the top edges. A rectangular top of thermoplastic material with a reversely bent peripheral wall providing a groove receives the upper end portions of the panels, the strip of thermoplastic material being bonded to the peripheral wall in permanent engagement. Each panel also has a closure flap at the lower end, with two opposed flaps being folded inwardly to form inner flaps and the other two opposed flaps being folded inwardly to form outer flaps. The outer flaps are sealed to the inner flaps by thermoplastic material, and the bottom corners of the container are internally sealed by dabs of thermoplastic material caused to flow into the corners after closure of the flaps. A method of forming, filling and sealing such a container is also disclosed.
429497
Gowling Lafleur Henderson Llp
Whiteside Michael G.
LandOfFree
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