Extrusion head including a sealing mechanism for a filter changi

Details Extrusion head including a sealing mechanism for a filter changi Extrusion head including a sealing mechanism for a filter changi

1986-09-25

1988-03-01

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

With apparatus assembly or dismantling means or with idle part

Means permitting removal or substitution of elements during...

210234, 210236, 425188, 425192R, 425197, 425376R, B29C 4768

Patent

active

047282797

ABSTRACT:
An extrusion head comprising at least one fixed head portion and at least one displaceable head portion pivotable into and out of an operative position includes means for filtering material being extruded and means for effecting change-over of the filter. The means for effecting the change-over includes at least two perforated plates displaceable on guide means in a direction generally at right angles to that of the extruded material. The at least one pivotable head portion includes a pressure surface which, in the operative position, abuts against the perforated plates thereby retaining the plates in position and sealing them against leakage of the extruded material.

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patent: 3833247 (1974-09-01), Puskas
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patent: 4619599 (1986-10-01), Herbert et al.
patent: 4642039 (1987-02-01), Anders

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