B - Operations – Transporting – 30 – B
Patent
B - Operations, Transporting
30
B
154/29.05
B30B 15/34 (2006.01) B29C 65/18 (2006.01) B29C 65/74 (2006.01)
Patent
CA 1248436
ABSTRACT This invention is an improved heatseal die that forms superior airtight seals. The die has opposed die faces, with one die face having longitudinal lands and the other die face having grooves for receiving the lands. The lands are truncated and the depth of the grooves is greater than the height of the lands. As a result, the force applied by the lands and grooves is applied entirely as a shearing force, which forms the superior heatseals.
497722
Crown Zellerbach Corporation
Ogilvy Renault Llp/s.e.n.c.r.l.,s.r.l.
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