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...
Reexamination Certificate
2008-07-08
2008-07-08
Heitbrink, Tim (Department: 1791)
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...
C425S563000
Reexamination Certificate
active
07396227
ABSTRACT:
When a molding machine nozzle is separated from a nozzle touch surface of a hot runner sprue, application of external pressure on resin in a resin supply passage is stopped. At this time, back pressure of resin in the resin supply passage that is received by a seal exceeds atmospheric pressure, and thus the seal is moved to seal an opening of the resin supply passage from the inside of the resin supply passage. As a result, leakage of resin from the hot runner sprue is inhibited, and mixing of air in the resin in a runner is also inhibited.
REFERENCES:
patent: 5180594 (1993-01-01), Trakas
patent: 6793480 (2004-09-01), Dominka
patent: 4-67923 (1992-03-01), None
Nakaya Masatoshi
Tabata Shozo
Finnegan Henderson Farabow Garrett & Dunner LLP
Heitbrink Tim
Toyota Jidosha & Kabushiki Kaisha
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