Split sprue bar having a device for preventing leakage

Details Split sprue bar having a device for preventing leakage Split sprue bar having a device for preventing leakage

2006-06-15

2008-12-09

Heitbrink, Tim (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With coupling between charger and mold

C425S588000

Reexamination Certificate

active

07462032

ABSTRACT:
A collar for reducing or eliminating leakage between components that moves with respect to each other in the field of injection molding. The collar has an outer portion for receiving an inner portion. The outer portion has a tapered, partial spherical, concave, or convex surface on its inside diameter, and the inner portion has a tapered or partial spherical, convex, or concave surface on its outside diameter. In the preferred embodiment, the inner portion of the collar is operatively assembled into a cavity of the outer portion of the collar, such that the tapered surface of the inner portion is slidably mounted to the tapered surface of the outer portion. The collar is operatively mounted around the outside diameter or circumference of, preferably, a cylindrical device and between two components that move with respect to each other.

REFERENCES:
patent: 4884962 (1989-12-01), Sheffield
patent: 4983117 (1991-01-01), von Buren et al.
patent: 5370523 (1994-12-01), Kushnir
patent: 5968562 (1999-10-01), Schad et al.
patent: 7189071 (2007-03-01), Olaru

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