Apparatus for the application of a liquid or pasty medium onto a

Details Apparatus for the application of a liquid or pasty medium onto a Apparatus for the application of a liquid or pasty medium onto a

1995-12-15

1999-01-12

Lamb, Brenda A.

Coating apparatus

Solid member or material acting on coating after application

Rotary member

118413, 118126, B05C 1102

Patent

active

058580905

ABSTRACT:
An apparatus for applying a liquid or pasty medium, i.e. a coating medium onto a moving material web, in particular consisting of paper or board. At least one application unit applies the medium. A roll associated with the application unit receives the medium. The application unit has an application doctor blade and has a cleaning doctor blade which is arranged at a distance from the application doctor blade in the direction opposite the direction of rotation of the roll. The cleaning doctor blade together with the application doctor blade defines an application chamber for the medium. In order to prevent the collection and build-up of fibers, foreign bodies and similar particles upstream of or on the entrance side of the cleaning doctor blade, as far as possible, the cleaning doctor blade is equipped with a blade bar which is supported by a holder. The holder has openings or channels for the discharge of the medium out of the application chamber in the direction opposite the direction of rotation of the roll and contacting the roll before it is exposed to the medium from the application chamber. The blade bar of the cleaning doctor blade is driven to rotate. The application doctor blade also has a blade bar that is driven to rotate.

REFERENCES:
patent: 2970564 (1961-02-01), Warner
patent: 3817208 (1974-06-01), Barnscheidt et al.
patent: 4282826 (1981-08-01), Wohlfeil
patent: 4773351 (1988-09-01), Sollinger
patent: 4839201 (1989-06-01), Rantanen et al.
patent: 5078081 (1992-01-01), Kustermann
patent: 5173120 (1992-12-01), Suzumura et al.
patent: 5328511 (1994-07-01), Beisswanger

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