Coinjection of hollow articles and preforms

Details Coinjection of hollow articles and preforms Coinjection of hollow articles and preforms

1986-05-12

1988-01-05

Woo, Jay H.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

2643284, 2643288, 26432815, 4251331, 425144, 425549, 425557, 425559, 425560, 425562, 425564, 425573, B29C 4502, B29C 4516, B29C 4520

Patent

active

047173246

ABSTRACT:
Apparatus for coinjecting a plurality of thermoplastic materials to mold an article having a layered wall structure using thermoplastic material having different optimum processing temperatures including the maintenance of the optimum temperatures in flow paths individual to each material from its source to a mold cavity.

REFERENCES:
patent: 3981650 (1976-09-01), Page
patent: 4030637 (1977-06-01), Boden et al.
patent: 4525134 (1985-06-01), McHenry et al.
patent: 4563149 (1986-01-01), Landis
patent: 4609516 (1986-09-01), Krishnakumar et al.

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