Collapsible core

Details Collapsible core Collapsible core

1976-04-14

1977-05-03

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Preform reshaping or resizing means: or vulcanizing means...

Rod or tubular preform

425403, 249180, 249184, 425DIG218, B29C 1700, B29D 2300

Patent

active

040211800

ABSTRACT:
Collapsible core assembly having retractable portion capable of producing plastic parts having an undercut. The core assembly comprises a segmented portion operably connected to an innercore pulling assembly whereby operation of the innercore pulling assembly first retracts the segmented core and thereafter pulls the complete core assembly out of the molded part.

REFERENCES:
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patent: 3247548 (1966-04-01), Fields et al.
patent: 3248756 (1966-05-01), Mills et al.
patent: 3310620 (1967-03-01), Martelli et al.
patent: 3339242 (1967-09-01), Lamb
patent: 3484900 (1969-12-01), Sands et al.
patent: 3677684 (1972-07-01), Platz
patent: 3732054 (1973-05-01), Lyng
patent: 3737271 (1973-06-01), Novak
patent: 3779688 (1973-12-01), Jullien-Davin
patent: 3784346 (1974-01-01), Moroschak
patent: 3859025 (1975-01-01), Maroschak
patent: 3940227 (1976-02-01), Strasser
patent: 3960472 (1976-06-01), O'Connor et al.
patent: 3966385 (1976-06-01), Spears

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