Plunger mechanism for use in a glassware forming machine

Details Plunger mechanism for use in a glassware forming machine Plunger mechanism for use in a glassware forming machine

1985-03-22

1986-08-26

Kellogg, Arthur

Glass manufacturing

Plunger

65172, 65234, C03B 1106

Patent

active

046080759

ABSTRACT:
The plunger mechanism is for use in moving a plunger into or out of a mould cavity and has a piston movable in a cylinder with a piston rod projecting from the piston. A plunger can be mounted on the piston rod. A passage passes through the piston and the piston rod and communicates with a chamber in the plunger or with the mould cavity. A tube which can be connected to a source of air under pressure or to a vacuum source passes through the cylinder and enters the passage. The gap between the passage and the tube is sealed by an inwardly-contracting ring with an overlapping joint which makes sealing contact around the tube. A ring of resilient material may encircle the inwardly-contracting ring to seal the gap between the inwardly-contracting ring and the wall of a recess in which it is mounted.

REFERENCES:
patent: 2379830 (1945-07-01), Samuelson et al.
patent: 3171732 (1965-03-01), Andersen
patent: 3598561 (1971-08-01), Hamilton

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