B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
154/30.1
B65B 61/10 (2006.01) B29C 65/00 (2006.01) B29C 65/22 (2006.01) B29C 65/74 (2006.01)
Patent
CA 1231882
Abstract Disclosed are an apparatus and method for cutting and sealing a plastic film. The plastics film is conveyed to a seal- ing area which contains a sealing wire in a housing over which the plastics film is draped out of contact with the wire. The wire is preheated to a first temperature and is then heated to a second higher temperature while a differential pressure is ap- plied to the film biasing it towards and into contact with the wire which cuts and heat seals it. By providing the heat sealing area in the outer periphery of a rotatable drum to which a con- tinuous film is conveyed, a continuous cutting and heat sealing process can be achieved.
444593
Colombo Edward A.
Sharps Gordon V. Jr.
Gowling Lafleur Henderson Llp
Mobil Oil Corporation
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