Container molding apparatus

Details Container molding apparatus Container molding apparatus

1974-12-23

1976-06-01

Annear, R. Spencer

Plastic article or earthenware shaping or treating: apparatus

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

Including shaping means comprising fluid pressure contacting...

264 92, B29C 1703

Patent

active

039604713

ABSTRACT:
Mold apparatus for vacuum forming sheet material, especially sheet plastic, including withdrawable projections which project into the mold cavities to form depressions or projections in the resulting molded item and are withdrawable to allow removal of the molded item. Sealing means, such as an "O" ring, on each projection, are included to prevent loss of vacuum through the mold walls around the projections. Counter-rotational camming means are provided for simultaneously projecting or withdrawing a plurality of the said projections either on one mold or on adjacent molds.

REFERENCES:
patent: 2784455 (1957-03-01), Pulaski
patent: 3058153 (1962-10-01), Busch

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