Self-cleaning doctor and method for using on web dryer cans

Details Self-cleaning doctor and method for using on web dryer cans Self-cleaning doctor and method for using on web dryer cans

1997-01-21

1998-08-11

Bennett, Henry A.

Drying and gas or vapor contact with solids

Process

Diverse types of drying operations

34120, 1525651, D21F 500

Patent

active

057910677

ABSTRACT:
A self-cleaning doctor for use with a papermachine or other paper processing machines and a method for using, wherein the doctor includes a doctor blade which is mounted on a shaft for rotation between a loaded position in which the blade is in contact with a surface that it doctors and an unloaded position in which the doctor blade is removed from the surface. The blade is oriented substantially vertically downward away from the surface when the doctor is in its unloaded position. Rotation of the doctor between its loaded and unloaded positions causes waste paper or the like that deposits or collects on the doctor to fall off the doctor into the papermachine basement.

REFERENCES:
patent: Re30924 (1982-05-01), Katayama et al.
patent: 2732773 (1956-01-01), Smith
patent: 2972767 (1961-02-01), Smith
patent: 3065486 (1962-11-01), Scott
patent: 3507745 (1970-04-01), Fuerst
patent: 4735688 (1988-04-01), Schwab et al.
patent: 4906335 (1990-03-01), Goodnow et al.
patent: 5021124 (1991-06-01), Turtinen et al.

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