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:
Dec. 19, 1989
Filed:
Apr. 06, 1988
Herbert Sommer, Dusseldorf, DE;
Hans Ruckert, Ratingen, DE;
Jagenberg Aktiengesellschaft, Dusseldorf, DE;
Abstract
The invention relates to a method and an apparatus for continuously applying a uniform coating to a material web (5), in particular a paper or cardboard web, travelling over a back roller (6), to which the coating material is applied at low pressure by means of a coating roller (2) and with guidance by a guide plate (8) into the coating gap (7) formed by the back roller and the coating roller, whereupon the coating material is metered by a metering member (15) and in the region of a layer close to the material web is partly drained in order to form a barrier layer and final metering takes place in a final metering device (23) by means of a final metering member (24) with low contact pressure. Due to a three-stage method of this type and the apparatus suitable therefore, even at comparatively high material web speeds, constant good coating qualities can even be achieved with extremely low coating weights.