C - Chemistry – Metallurgy – 08 – L
Patent
C - Chemistry, Metallurgy
08
L
18/52, 403/67
C08L 23/08 (2006.01) B29C 44/00 (2006.01) B29C 44/04 (2006.01) B65D 39/00 (2006.01) C08J 9/00 (2006.01) C08J 9/04 (2006.01) C08L 31/04 (2006.01)
Patent
CA 1177600
ABSTRACT OF THE DISCLOSURE A method for making closures resembling natural cork for sealing liquid product containers is described. A strand of expandable plastic material is injected into each mold cavity and is permitted to collect in that cavity in randomly oriented groups of coils which expand to fill the cavity and coalesce to create randomly oriented grain lines on the surface of the closure resembling the appearance of natural cork. Also described are methods of molding the closures which preclude the formation of leakage channels on the closure surface and preferred blends of plastic resins and pigment particles used to achieve the cork-like appearance.
388118
Altschuler J. George
Paisley Gary V.
Rommler Joseph
Coca-Cola Company (the)
Gowling Lafleur Henderson Llp
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