Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – Including means to prepare parison
Reexamination Certificate
2006-04-25
2006-04-25
Davis, Robert B. (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
Female mold and means to shape parison directly by internal...
Including means to prepare parison
C425S534000, C425S541000
Reexamination Certificate
active
07033162
ABSTRACT:
An injection blow molding device in which a lip mold is formed in different shapes for an injection mold and a blow mold. Mold clamping surfaces corresponding to the different shapes are formed on the injection mold and the blow mold, respectively, to prevent an air leakage from the blow mold. An upper portion of an outside surface of the lip mold which contacts the mold is formed in a tapered surface whereas a lower end portion of the outside surface is formed in a vertical surface. The upper portion and the lower portion of a surface contacting the lip mold, of each of the injection mold and the blow mold are formed respectively in a tapered surface and a vertical surface that correspond to the tapered surface and the vertical surface of the outside surface of the lip mold. Clamping the lip mold in the injection mold is performed at the tapered surface of the upper portion and clamping the lip mold in the blow mold is performed at the vertical surface of the lower end portion.
REFERENCES:
patent: 3244778 (1966-04-01), Ninneman
patent: 3471896 (1969-10-01), Ninneman
patent: 3488805 (1970-01-01), Grothjan et al.
patent: 3816580 (1974-06-01), Valyi
patent: 2000043128 (2000-02-01), None
Horiuchi Wataru
Yamaguchi Hisao
A.K. Technical Laboratory Inc.
Davis Robert B.
Weingarten Schurgin, Gagnebin & Lebovici LLP
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