The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 12, 1999
Filed:
Dec. 15, 1995
Ingo Gottwald, Steinheim, DE;
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.