Means and method for removal of strings from waste paper

Details Means and method for removal of strings from waste paper Means and method for removal of strings from waste paper

1988-02-11

1989-02-14

Schor, Keneth M.

Paper making and fiber liberation

Processes of chemical liberation, recovery or purification...

With classifying, separating or screening of pulp

162 4, 209279, 209280, 209362, 210359, 210415, 241 79, 366296, 366301, 366320, D21B 132

Patent

active

048044393

ABSTRACT:
A method and apparatus for removing stringy contaminants from a pulp in a wastepaper recovery system having a pulping vat with an elongate helically shaped rod in the vat with means for causing a relative rotation between the stock and the helical rod so that long slender contaminants will be captured and climb the rod. In one form, multiple helices are employed and the rods may be driven in rotation, or the stock caused to rotate about the helix by other means.

REFERENCES:
patent: 1734632 (1929-11-01), Merrill
patent: 3315947 (1967-04-01), Nauta
patent: 3615014 (1971-10-01), Hruby
patent: 4017033 (1977-04-01), Tra
patent: 4535943 (1985-08-01), Couture
patent: 4725007 (1988-02-01), Chupka

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