Piston for ejecting a viscous or plastic mass

Details Piston for ejecting a viscous or plastic mass Piston for ejecting a viscous or plastic mass

1979-11-14

1982-04-06

Tollberg, Stanley H.

Dispensing

With discharge assistant

Container with follower

B67D 546

Patent

active

043231772

ABSTRACT:
An ejection piston for use in cylindrical dispensing containers or packages of the type containing viscous or plastic masses such as sealing compounds and adhesives. The piston assembly comprises a piston part having a peripheral skirt as well as an arched piston top, and a separate piston actuating member arched in a direction opposite to the piston top. An ejection pressure is applied to the actuating member and transmitted to the piston top whereby the effective diameter of the piston top is slightly increased. An annular sealing sleeve for receiving the piston skirt and the adjacent free end of the cylindrical container during storage may be formed integrally with the piston actuating member.

REFERENCES:
patent: 2430718 (1947-11-01), Jacobson
patent: 2695735 (1954-11-01), Doornik
patent: 2887253 (1959-05-01), Biedenstein
patent: 2941699 (1960-06-01), Schmidt et al.
patent: 3178074 (1965-04-01), Sundholm

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