Blow mold

Plastic article or earthenware shaping or treating: apparatus – Female mold and means to shape parison directly by internal... – Forming baffle – bottleneck – or handle

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Details

264526, 264527, 264536, 425522, 425527, 425812, B29C 1707

Patent

active

044861648

ABSTRACT:
An integral hinged blow molded container having a single wall is produced by inflating a parison within a mold having a hinge forming area with a draw ratio of greater than 1 whereby the parison is reduced to thickness within the hinge forming area relative to the adjacent area. The thus formed parison is severed about a circumference adjacent the formed hinge to create a top portion and a bottom portion openable and closable about the hinge.

REFERENCES:
patent: 2248898 (1941-07-01), Ross et al.
patent: 3292252 (1966-12-01), Reading
patent: 3524488 (1970-08-01), Scholle
patent: 3659999 (1972-05-01), Shurman
patent: 3714311 (1973-01-01), Stefanka
patent: 3939236 (1976-02-01), Hahn
patent: 4082827 (1978-04-01), Chlystun
patent: 4120635 (1978-10-01), Langecker
patent: 4176413 (1979-12-01), Whitney et al.

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