Plastic article or earthenware shaping or treating: apparatus – With apparatus assembly or dismantling means or with idle part – Pivotally joined housings or housing sections enclosing...
Patent
1991-11-05
1992-06-16
Woo, Jay H.
Plastic article or earthenware shaping or treating: apparatus
With apparatus assembly or dismantling means or with idle part
Pivotally joined housings or housing sections enclosing...
264175, 425190, 425194, 425317, 4253824, 425466, B29C 4732
Patent
active
051220490
ABSTRACT:
An extruder has a screw rotatable in a housing and an extrusion head having an upper part bolted to the housing and a lower part hingedly connected to the housing for movement between a closed operative position and an open position. The upper part of the extrusion head is located above the screw so that the screw can be removed from the housing when the lower extrusion head part is swung to open position and without removing the upper extrusion head part from the housing. The two extrusion head parts define between them a flow passage directed toward the upper roller of a calender. A movable lip on the lower extrusion head part faces, and is spaced from, the upper calender roller to define a variable gap through which extruded material must pass before reaching the narrowest part of the gap between the calender rollers. The lip is either pivoted at an upper edge or is slidable toward and away from the upper calender roller to vary the width of the gap formed between the lip and the upper calender roller.
REFERENCES:
patent: 3274645 (1966-09-01), Chase
patent: 3694120 (1972-09-01), Walton
patent: 4354814 (1982-10-01), Grimminger et al.
patent: 4642039 (1987-02-01), Anders
patent: 4963309 (1990-10-01), Gohlisch et al.
Burns Robert E.
Lobato Emmanuel J.
Mackey James P.
Paul Troester Maschinenfabrik
Woo Jay H.
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