Apparatus for filtering plasticized materials in extruders

Details Apparatus for filtering plasticized materials in extruders Apparatus for filtering plasticized materials in extruders

1986-05-16

1987-10-20

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, 425198, B29C 4768

Patent

active

047011181

ABSTRACT:
Apparatus for filtering a stream of plasticized synthetic plastic material in an extruder has a housing with four or more channels connecting a material-admitting inlet with a material-discharging outlet. The housing is formed with parallel bores each of which receives a single reciprocable cylindrical carrier of two or more filters or two independently reciprocable cylindrical carriers of discrete filters. Each carrier can be moved between a first position in which its filter or filters register with discrete channels of the housing and at least one additional position in which its filter or one of its filters is accessible. At least 75 percent of filtering capacity remains available when a filter is being inspected, cleaned or replaced. The carriers seal those channels which are not in line with filters while the carriers are out of their first positions.

REFERENCES:
patent: 3455357 (1969-07-01), Zink
patent: 3488807 (1970-01-01), Vossen
patent: 3669166 (1972-06-01), Colin
patent: 3900399 (1975-08-01), Kreyenborg et al.
patent: 4025434 (1977-05-01), Mladota
patent: 4070138 (1978-01-01), Stanwood
patent: 4082487 (1978-04-01), Rapp
patent: 4167384 (1979-09-01), Shirato et al.
patent: 4511472 (1985-04-01), Trott

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