Filter screen changer for resin extruder

Details Filter screen changer for resin extruder Filter screen changer for resin extruder

1995-09-20

1997-02-18

Walker, W. L.

Liquid purification or separation

Convertible

210340, 210357, 210359, 210447, 425199, B01D 2962

Patent

active

056038283

ABSTRACT:
A screen changer has not only the conventional slide bars with material injection channels and first air withdrawing channels, but also second air withdrawing channels, as well as material withdrawing channels when the slide bars are in an intermediate position where the filter portions provided through those slide bars in a direction normal to the axis are sealed and isolated within through-holes in the housing; said second air withdrawing channels communicate the topmost parts of the downstream compartments with the outside of the housing and are provided such that after penetrating through the slide bars, they extend along the outer surfaces of those slide bars; said material withdrawing channels are provided through the housing such that they communicate the exit ends of the downstream compartments with the outside of the housing.

REFERENCES:
patent: 3684419 (1972-08-01), Voight
patent: 3983038 (1976-09-01), Heston
patent: 4025434 (1977-05-01), Mladota
patent: 4814186 (1989-03-01), Trott
patent: 5122286 (1992-06-01), Kreyenborg et al.
Kunststoffberater, vol. 37, No. 5, May 1992, Isernhagen de, pp. 42-45.

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