Method for molding a bi-material cap
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United States of America Patent
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Apr 17, 2018
Issued Date -
N/A
app pub date -
May 19, 2015
filing date -
Mar 29, 2011
priority date (Note) -
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status (Latency Note)
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Abstract
The disclosure includes a cap having a first portion made of a plastic material and forming a bottom for covering a container neck and a protective side wall for surrounding the container neck, and a second portion made of a flexible material that is compatible with the plastic material of the first portion and separate from the plastic material of the first portion, the second portion being annular and consisting of a flexible seal, which projects from the bottom toward the interior of the side wall and which is welded to the first portion. Thus, the manufacture of the stopper by molding includes injecting a flexible material to produce the flexible annular seal and then the movable portions of the mold are placed such that the flexible material is in a groove that is set back from the planar surface of the mold.
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