B - Operations – Transporting – 65 – B
Patent
B - Operations, Transporting
65
B
B65B 53/02 (2006.01) B29C 61/02 (2006.01) B29C 65/02 (2006.01) B65B 7/28 (2006.01) B65D 43/02 (2006.01)
Patent
CA 2706785
A thermoplastic heat seal is created between a polymeric shrink film and a polymeric surface of an open top container. Radiant energy is uniquely focused on a prescribed periphery of the film that has been at least partially modified to absorb it. Sufficient heat is generated to shrink the film, urging it towards the rim of the container, simultaneously softening at least one polymeric surface. The shrink force of the film provides the required pressure to thermoplastically bond the polymeric surfaces. An effective, robust spill resistant lid that can also withstand the heat and steam of hot beverages is now possible. Also disclosed is a polymeric lid adapted to provide access to a container. This includes a pull tab created by at least partially eliminating radiant energy absorbing material in at least one extremity of the polymeric film. Also disclosed are novel means to efficiently transport and position a thin, pliable, limp material and centrally locate it on an open top container.
Bakker William John
Na
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