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:
Jul. 22, 1997
Filed:
Oct. 08, 1996
Applicant:
Inventor:
Jukka Koskinen, Helsinki, FI;
Assignee:
Valmet Corporation, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ;
U.S. Cl.
CPC ...
427348 ; 118 63 ;
Abstract
In air-knife coating, the coating mix is applied to the paper or board web by a coating applicator, and the coating mix is doctored to the desired coating thickness by blowing a sharp air jet discharged from an air knife. The air knife doctoring separates coating mix that has not been absorbed by the web forming a filter-cake layer. The air knife is directed at the upper boundary between the filter-cake layer and the un-absorbed coating mix. The coat weight is controlled by adjusting the distance between the point of initial application of the coating mix to the web and the point of doctoring where coating mix is removed.