Apparatus for continuously applying a coating to a sheet of inde

Details Apparatus for continuously applying a coating to a sheet of inde Apparatus for continuously applying a coating to a sheet of inde

1996-10-03

1998-05-05

Edwards, Laura

Coating apparatus

Control means responsive to a randomly occurring sensed...

Condition of coated material

118696, 118712, 118120, 118123, 118126, B05C 100

Patent

active

057468338

ABSTRACT:
An apparatus for continuously applying a coating to a running web, includes an elastic doctor blade having first and second ends, a frontal ride adapted to be oriented towards the web and a reverse side opposite the frontal aide and adapted to be oriented away from the web. The apparatus further has a clamping device firmly holding the doctor blade by engagement therewith in a zone of the first end. The clamping device positions the doctor blade for contacting the web at the second end along a scraping line. The apparatus also has an inflatable actuator engaging the reverse side of the doctor blade between the clamping device and the first and of the doctor blade. The actuator has a pressurized state in which a surface portion of the actuator is enlarged by an inflating fluid towards the reverse side of the doctor blade for pressing it against the web. A fluid pressure source is connected to the in inflatable actuator. A pressure control device generates in the actuator periodic fluid pressure fluctuations of predetermined frequency and magnitude to impart corresponding oscillations to the doctor blade.

REFERENCES:
patent: 1566358 (1925-12-01), White
patent: 3722465 (1973-03-01), Krautzberger
patent: 4331713 (1982-05-01), Girard et al.
patent: 4405661 (1983-09-01), Alheid
patent: 4553498 (1985-11-01), Sommer et al.
patent: 5242498 (1993-09-01), Kohler et al.

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