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:
Feb. 11, 2003
Filed:
Oct. 26, 2000
Mark C. Zaretsky, Rochester, NY (US);
Steven A. Billow, Pittsford, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
A method is taught for curtain coating a liquid composition onto a moving web at a coating point where the moving web is supported on a backing roller. The web is partially wrapped around the backing roller, the backing roller including a relief patterned area on the surface thereof, the relief patterned area including relieved features and non-relieved features, the relieved features and the non-relieved features creating an electrostatic force difference exerted on the liquid composition at the coating point when an electrostatic field is applied thereto. A web speed is specified and the electrostatic force difference exerted on the liquid composition at the coating point is varied to determine a maximum electrostatic force difference for the specified web speed that achieves the predetermined acceptable level of coating thickness non-uniformity. The web is moved at the specified web speed and an operating electrostatic force difference is generated at the coating point that is not greater than the maximum electrostatic force difference for the specified web speed.