Filtering arrangement for thermoplastics materials

Details Filtering arrangement for thermoplastics materials Filtering arrangement for thermoplastics materials

1980-11-20

1982-06-01

Thurlow, Jeffery R.

Plastic article or earthenware shaping or treating: apparatus

With upstream screen or perforated plate for straining,...

210 91, 210409, 210411, 210791, 210DIG15, 425199, 425376R, 425376B, 425378R, B29B 502

Patent

active

043325416

ABSTRACT:
A filtering arrangement of thermoplastics extruding apparatus has a rotatable cylindrical screen unit through which material flows radially inwards and is discharged axially and an outlet aperture for impurities which are washed from the screening unit by reverse flow, i.e. radially outward flow, of part of the filtered material. The outlet aperture for the impurities is variable in cross-section by moving an arcuate segment about the axis of the cylinder to control the extent of reverse flow washing.

REFERENCES:
patent: 2736058 (1956-02-01), Dellheim
patent: 3146494 (1964-09-01), Sponaugle
patent: 3455357 (1969-07-01), Zink
patent: 3480706 (1969-11-01), Carpenter et al.
patent: 3804381 (1974-04-01), Bielfeldt et al.
patent: 3817377 (1974-06-01), Piggott
patent: 4070138 (1978-01-01), Stanwood

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