Apparatus having moveable pocket forming members for injection m

Details Apparatus having moveable pocket forming members for injection m Apparatus having moveable pocket forming members for injection m

1972-12-13

1976-03-30

Husar, Francis S.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

Female mold type means

425129R, B29F 110

Patent

active

039471993

ABSTRACT:
A novel printing plate is produced by placing an electrotype shell and a partial base in a mold cavity, holding them in place in properly spaced relation to each other as by means of vacuum and hydraulically or pneumatically operated holddown mechanisms, and filling the mold cavity with molten plastic or similar synthetic material from a plastic injection machine. The partial base skeleton includes scarf cavities, and portions of this skeleton may be embedded in the plastic when it hardens into the final shape.

REFERENCES:
patent: 2811744 (1957-11-01), Baldanza
patent: 3010394 (1961-11-01), Borchers et al.
patent: 3029730 (1962-04-01), Parrish et al.
patent: 3247550 (1966-04-01), Haines, Jr.
patent: 3248758 (1966-05-01), Schmitz et al.
patent: 3338163 (1967-08-01), De Maria et al.
patent: 3476852 (1969-11-01), Shattuck
patent: 3608020 (1971-09-01), Langecker
patent: 3759479 (1973-09-01), Howell et al.

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