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Title: Injection blow molding method for producing double layered hollow article

Abstract: Injection blow molding method for producing double layered hollow articles, the method being characterized in that the molding of an outer parison and an inner parison by using injection molds, molding of an outer layer from an outer parison by using one blow mold and molding of an inner layer from an inner parison by using the other blow mold which holding an outer layer formed in the preceding cycle, are carried out simultaneously but in different positions in the apparatus.


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Inventors: Aoki, Katashi (Sakaki, JA)

Application Number: 463409
Filing Date: 1974-04-23
Publication_date: 1976-03-09
Assignee: Nissei Plastics Industrial Co., Ltd. (JA)
Primary Class(es): 264/513 264/538, 425/523, 425/533
Other Classes:
US Patent Ref:
3091000May, 1963Makowski264/97.
3113831Dec, 1963Coale264/94.

Other Refs:
Primary Examiner: Silbaugh, Jan H.
Assistant Examiner:
Attorney: Ostrolenk, Faber, Gerb & Soffen