Check valve lip seal for an injection molding machine

Details Check valve lip seal for an injection molding machine Check valve lip seal for an injection molding machine

2007-11-06

2007-11-06

Kerns, Kevin P. (Department: 1725)

Plastic article or earthenware shaping or treating: apparatus

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

With means between charger and mold to cut off flow of...

C137S528000

Reexamination Certificate

active

10875047

ABSTRACT:
A check valve for a molding machine. The check valve has a stem portion and a ring portion movable along said stem portion between a melt channel open position and a melt channel closed position. A groove is formed in a forward face of the ring portion. The groove, in operation, receives melt to force an outer circumferential portion of the ring in a radial direction to provide a seal between the ring portion and a wall in the machine.

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