Multilayer synthetic stopper

Stock material or miscellaneous articles – Hollow or container type article – Glass – ceramic – or sintered – fused – fired – or calcined metal...

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Details

428 663, 428 664, 428515, 428516, 428212, 215355, 215362, A47G 1922, B28B 2100, B28B 2172, B28B 2308, B29D 2200

Patent

active

061532754

ABSTRACT:
The invention relates to a stopper for use in a substantially cylindrical bottle opening. The stopper has a substantially cylindrical shape to seal the bottle opening and includes a first polymer portion and a second material portion, wherein the second material portion coaxially overlies the first polymer portion. In another embodiment, the stopper includes a third polymer portion wherein the first polymer portion coaxially overlies the third polymer portion. The invention also relates to a method of protecting liquid in a bottle with a substantially cylindrical bottle opening. The method includes providing a stopper having a substantially cylindrical shape to seal the bottle opening and closing off the bottle by insertion of the stopper into the bottle opening. The invention also relates to a method of producing a stopper for use in a substantially cylindrical bottle opening. In one embodiment, the method includes extruding a first polymer portion through an extrusion die, coaxially coating the first polymer portion with a second material portion to form a body, and forming the body into a shape to substantially seal the bottle opening. The first polymer portion and the second material portion may be formed by co-extrusion or in a step-wise manner.

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