Composite ejecting piston with chamber

Details Composite ejecting piston with chamber Composite ejecting piston with chamber

1987-05-08

1988-12-20

Rolla, Joseph J.

Dispensing

With discharge assistant

Container with follower

222386, 92181R, B67D 542, G01F 1100

Patent

active

047920653

ABSTRACT:
A composite piston for ejecting a plastic mass from a receptacle includes a piston head and a pressure component which in combination form a chamber. The piston head and pressure component are displaceable within the receptacle from an insertion position into a locked position. When being moved into the locked position, a part of the plastic mass flows through an opening in the piston head into the chamber. After the locked position is established, the opening in the piston head is closed by an extension on the pressure component.

REFERENCES:
patent: 1953109 (1934-04-01), Heron
patent: 2371332 (1945-03-01), Jacobson
patent: 3164303 (1965-01-01), Trautmann
patent: 4657161 (1987-04-01), Endo et al.

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