Plastic article or earthenware shaping or treating: apparatus – With separate and distinct upstream agitating or kneading means – Plural means being diverse – or parallel and intermeshing or...
Patent
1991-05-16
1992-10-06
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
With separate and distinct upstream agitating or kneading means
Plural means being diverse, or parallel and intermeshing or...
425207, 425209, 366 77, 366 85, 366 88, 366190, 366195, 366196, B29B 748, B29B 780
Patent
active
051530090
ABSTRACT:
An extrusion device for processing thermoplastic plastics material and rubber has a housing and primary screw means rotatably mounted therein. The device includes a discharge zone in which a sleeve member provided with external flights is mounted on a bearing shaft so as to be rotatable about its longitudinal axis, which sleeve member is drivable by the primary screw means but in an opposite direction thereto so as to increase the discharge pressure acting on the material being processed.
REFERENCES:
patent: 4707139 (1987-11-01), Valenzky et al.
patent: 4890996 (1990-01-01), Shimizu
patent: 5048405 (1991-09-01), Takahashi et al.
Hermann Berstorff Maschinenbau GmbH
Nguyen Khanh P.
Woo Jay H.
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