Doctor blade apparatus

Printing – Inkers – Fountains

Patent

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Details

101169, B41F 3104

Patent

active

059837985

ABSTRACT:
A doctor blade apparatus is attached to a doctor whose doctor blade is pressed against a metering roller provided in an inking train of a printing apparatus and scrapes off an excess portion of ink transferred onto the circumferential surface of the metering roller. The doctor blade apparatus comprises a blade holder attached to a base which moves toward and away from the metering roller, a doctor blade held by the blade holder and extending along substantially the entire axial length of the metering roller, and an elasticity-modifying member which abuts, along the longitudinal direction of the doctor blade, a deflection-side surface of the doctor blade whose edge is pressed against the circumferential surface of the metering roller and deflects accordingly. The elasticity-modifying member is movable toward and away from the edge of the doctor blade. A reciprocal movement mechanism reciprocally moves the elasticity-modifying member toward and away from the edge of the doctor blade. A plurality of elasticity-modifying members may be provided for a single doctor blade along the axial direction of the metering roller and may be adapted to be movable independently of each other.

REFERENCES:
patent: 4402264 (1983-09-01), Weisgerber
patent: 4495864 (1985-01-01), Junghans
patent: 4587899 (1986-05-01), Theilacker
patent: 5383395 (1995-01-01), Buschulte
patent: 5694851 (1997-12-01), Bruni
patent: 5832830 (1998-11-01), Rancourt et al.
patent: 5842416 (1998-12-01), Olawsky et al.
patent: 5857412 (1999-01-01), Roskosch et al.
Newspaper Printing Handbook--The Japan Newspaper Publishers and Editors Association, pp. 67, 68, 178, 189; Apr. 10, 1997. (See p. 2 of the specification).

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