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US 4,486,100 AGranted
Apparatus for feeding synthetic resin powder to screw extruder
AssigneeKureha Kogyo Kabushiki Kaisha
InventorsKaichi Endo, Yoshihiro Katahira, Eiichi Hayashi, Satoshi Nakano
Life of this patent
Estimating the term…
Abstract
An apparatus for the feeding of powderous resin material to a vacuum hopper is improved by providing at least one vertical pipe-line portion between the resin tank and the vacuum hopper, and disposing a flow restricting element such as an orifice in this pipe-line portion.
Claims6
An apparatus for feeding synthetic resin powder to a screw extruder, comprising;
- a raw material feed-line connecting a synthetic resin powder tank and a vacuum hopper connected directly to said screw extruder, said feed-line having an at least substantially vertical pipe-line portion at at least one portion in-line with said feed-line, at least one flow restriction means being provided in said vertical pipe-line portion, means for blocking said raw material feed-line and disposed in said pipe-line portion at a portion thereof upwardly of said flow restriction means, said vacuum hopper being connected to a vacuum pump.
Dependencies are inferred from the claim text.