Method for forming bottle closure
AssigneeYoshida Industry Co., Ltd.
InventorsYoshiharu Hatakeyama, Shinichi Kozuka
Life of this patent
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Abstract
A bottle closure is formed by: forming a frusto-conical hollow sealing member having an open lower end, of a soft synthetic-resin, and disposing such member in a molding die defining a T-shaped cavity with an upper end of the member being projected into a horizontal portion of the cavity. A molten hard synthetic-resin is injected into the cavity through the open end of the member. Such hard resin is cooled to form a closure cap having embedded therein the upper end of the member, thereby integrally mounting the sealing member with a closure cap.
Claims4
A method for forming a bottle enclosure, said method comprising:
- forming of a soft thermoplastic synthetic resin material a hollow sealing member having a frusto-conical configuration, an outer surface having extending therefrom circumferential projections, a first open end and a second end having therein an opening;
- disposing said sealing member in a molding die defining a cavity having a generally T-shaped configuration in elevation, with said first end of said sealing member projecting into a horizontal portion of said cavity;
- injecting a hard thermoplastic synthetic resin material through said opening in said second end of said sealing member and thereby into said cavity;
- and
- cooling said hard resin material to thereby form a closure cap while embedding said first end of said sealing member in a horizontal section of said closure cap, and thereby integrally mounting said sealing member around a vertical section of said closure cap.
Dependencies are inferred from the claim text.