B - Operations – Transporting – 31 – B
Patent
B - Operations, Transporting
31
B
B31B 7/00 (2006.01) B29C 63/02 (2006.01) B65D 5/56 (2006.01)
Patent
CA 2570099
A method for encapsulating a cellulose based substrate (20) with polymeric film (43) involves raising the temperature of the respective films using an electromagnetic radiation source and providing a pressure differential between an environment defined between the films (43) and an environment external to the films so that conformance of the films to the cellulose based substrates is promoted. The cellulose based substrate (20) is entirely encapsulated by the plastic films (43) and the films are sealed around the peripheral edges of the cellulose based substrate (20) as well as edges that are defined by slots (32) and cutouts (42).
La méthode de mise en capsules d~un substrat à base de cellulose (20) dans un film polymérique (43) s~effectue en augmentant la température des films respectifs à l~aide d~une source de rayonnement électromagnétique et en fournissant une pression différentielle entre l~environnement délimité par les films (43) et l~environnement externe aux films afin d~accentuer la conformité des films aux substrats à base de cellulose. Le substrat à base de cellulose (20) est entièrement encapsulé par les films plastiques (43) qui sont scellés autour des bordures périphériques du substrat (20) ainsi que des bordures délimitées par les encoches (32) et les découpes (42).
Christensen Elmer
Horsfield Brian C.
Muise Herbert D. SR.
Wilhite Gerald
Gowling Lafleur Henderson Llp
International Paper Company
Weyerhaeuser Company
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