Doctor device for the self-washing inking unit of a rotary print

Details Doctor device for the self-washing inking unit of a rotary print Doctor device for the self-washing inking unit of a rotary print

1991-01-22

1993-02-02

Fisher, J. Reed

Printing

Inkers

Roller

101366, B41F 3104, B41F 3106, B41L 2708

Patent

active

051829924

ABSTRACT:
A doctor device for the washing inking unit of a rotary printing press includes a doctor carrier, on which two doctor blades are attached. The doctor blades are parallel to and coextensive with each other and are able to be put into engagement with an inking roller. Together with the inking roller, the doctor carrier and sealing means provided at the end thereof, the doctor blades define a sealed ink chamber. The ink is supplied to and removed from the ink chamber through ducts. The doctor carrier is able to be brought into engagement with the inking roller by sealing moldings. In order to ensure that no ink is able to escape from the ink chamber, even when the doctor device oscillates, the sealing moldings are formed of elastic or elastomeric material, which, on their sides facing the inking roller, have dihedral, downwardly sloping surfaces for supporting the end parts of the doctor blades. Between the dihedral surfaces, a curved sealing surface is provided. The curved sealing surface has the shape of a cylindrical shell and is able to be brought into engagement with the inking roller. The sealing surface has a radius of curvature corresponding to the inking roller.

REFERENCES:
patent: 3400658 (1968-09-01), Gagliardi et al.
patent: 4414900 (1983-11-01), Kraus et al.
patent: 4590855 (1986-05-01), Schommer et al.
patent: 4754701 (1988-07-01), Batke
patent: 4958561 (1990-09-01), Grosshauser et al.

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