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:
Apr. 06, 1993
Filed:
Apr. 19, 1991
James L Chance, Rockton, IL (US);
Beloit Technologies, Inc., Wilmington, DE (US);
Abstract
A short dwell coater apparatus is disclosed for applying coating material onto a web guided by a backing roll. The apparatus includes a coater housing which is disposed in close proximity to the backing roll. The arrangement is such that the web guided by the backing roll moves between the backing roll and the housing. The housing defines an application chamber which is open towards the web and which extends along the web in a cross-machine direction. The application chamber is connected to a source of coating material such that the coating material is applied to the web during movement of the web past the chamber. The coater housing has an upstream lip which is disposed upstream relative to the chamber and adjacent to the web. The lip defines an upstream coating overflow for permitting excess coating material to flow therethrough. A flexible coater metering blade is disposed downstream relative to the chamber. The blade extends from the housing towards the web for metering the coating material applied to the web. A perforate conduit is disposed within the chamber and extends in a cross-machine direction. The conduit permits the flow therethrough of a vortex of entrained air generated within the chamber such that in use of the apparatus, when the vortex of entrained air is generated within the chamber, the air flows through the perforate conduit away from the chamber so that streaking of the coating material due to the intermittent escape of the entrained air past the metering blade is inhibited.