Retortable composite closure for plastic containers

Details Retortable composite closure for plastic containers Retortable composite closure for plastic containers

B - Operations, Transporting

65

D

226/106, 277/58,

B65D 53/04 (2006.01) B65D 51/14 (2006.01) B67B 5/00 (2006.01)

Patent

CA 2022341

This invention relates to a closure which permits the opening of a hermetically sealed plastic container in a single action motion, which also maintains the hermetic seal under retort conditions. This closure includes a generally cylindrical side wall having threads along the inner surface thereof and a top portion having a metallic disk with its lower surface coated with a fusible coating, such as polypropylene. An annular flange is provided along the inner surface of the side wall to retain the metallic disk between the annular flange and an inwardly inclined inner surface portion of the side wall. A method is also disclosed for providing a hermetic seal on plastic containers using the closure of this invention.

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