Method and apparatus for attaching sealing piece onto pour-out h

Details Method and apparatus for attaching sealing piece onto pour-out h Method and apparatus for attaching sealing piece onto pour-out h

1982-09-23

1983-12-20

Lowe, James B.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Punching article from sheet material

264259, 264278, 425126R, 425127, 425289, 425809, B29C 604, B29C 1710, B29D 2302

Patent

active

044217056

ABSTRACT:
The present invention is carried out in combination with the injection molding of a closure cap or container, wherein a continuous sealing strip having a thermoplastic resin layer on the inner surface thereof is supplied intermittently. Then a reciprocable molding member having a sharp edge at the tip thereof is advanced through the sealing strip to a position where a molding cavity in the injection mold defining a pour-out hole of a closure cap or container is closed by a sealing piece punched out from the sealing strip, and thereafter a thermoplastic resin is injected into the molding cavity.

REFERENCES:
patent: 2479959 (1949-08-01), O'Neil
patent: 2811744 (1957-11-01), Baldanza
patent: 2874413 (1959-02-01), Grussen
patent: 2965932 (1960-12-01), Knowles
patent: 3427688 (1969-02-01), Wilson
patent: 3657405 (1972-04-01), Langecker
patent: 4117069 (1978-09-01), Von Holdt

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