Flexible plunger apparatus for a glass forming machine

Details Flexible plunger apparatus for a glass forming machine Flexible plunger apparatus for a glass forming machine

1992-03-16

1993-05-25

Woodard, Joye L.

Glass manufacturing

Press molding machine

65323, 65362, 425406, C03B 1106

Patent

active

052136035

ABSTRACT:
A plunger/ring apparatus for press-forming articles of glass, or other formable materials within a mold is disclosed. The disclosed plunger/ring apparatus is provided with a plurality of spring loaded segments which extend outwardly from the plunger to coact with engineered passageways located upon the inner wear surface of the ring to form a seal in the plunger/ring interface area in which air, but not the material to be press-formed, may pass to and from ambient upon press-forming the formable material. An alternative embodiment is also disclosed in which the engineered passageways are located upon the wear surfaces of the segments and with optional additional passages located upon the upper periphery of the plunger.

REFERENCES:
patent: 947632 (1910-01-01), Bolton
patent: 1655917 (1926-02-01), Obiol
patent: 1898251 (1929-01-01), Kopp
patent: 2252292 (1941-08-01), Poglein
patent: 2966007 (1958-03-01), Sherts et al.
patent: 4272273 (1981-06-01), Trahan et al.
patent: 4661143 (1987-04-01), Foster
patent: 4786444 (1988-11-01), Hwang
patent: 4824460 (1989-04-01), Fenton
patent: 4888040 (1989-12-01), Douglas et al.

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