Filter changing apparatus for flowable plastic material

Details Filter changing apparatus for flowable plastic material Filter changing apparatus for flowable plastic material

1990-12-12

1992-06-16

Nozick, Bernard

Liquid purification or separation

Processes

Separating

210411, 425197, B01D 2446

Patent

active

051222868

ABSTRACT:
A filter changing apparatus for use with an extruder for plasticized synthetic plastic material has a housing with one or more bores for reciprocable cylindrical carriers of tubular filters. Each carrier is movable between at least one first position in which a stream of plastic material can flow from an inlet of the housing, axially into one end of the filter, radially outwardly from the filter and into an outlet of the housing, and at least one second position in which the carrier seals the inlet from the outlet or permits expulsion of contaminants and plastic material from the filter in a direction toward the inlet or into a second outlet of the housing.

REFERENCES:
patent: 3455357 (1969-07-01), Zink
patent: 3669166 (1972-06-01), Colin
patent: 4202659 (1980-05-01), Kinoshita
patent: 4332541 (1982-06-01), Anders et al.
patent: 4597870 (1986-07-01), Lambertus
patent: 4701118 (1987-10-01), Koching et al.
patent: 4725215 (1988-01-01), Kreyenborg
patent: 5004414 (1991-04-01), Stude et al.

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