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:
May. 06, 1980
Filed:
Oct. 12, 1978
Paul H Stibbe, DePere, WI (US);
Robert A Daane, Green Bay, WI (US);
W. R. Grace & Co., New York, NY (US);
Abstract
An air bar for floating a running web and having two spaced apart air nozzles through which pressurized air is directed against the web to form a supporting air cushion for the web. The nozzles are elongated slots extending transversely of the web and which are positioned at each edge of an intervening plate that also is located transversely of and closely adjacent the running web. The plate has curved edges, one located adjacent each of the slots whereby the air issuing from the slots tends to follow the curvature of the curved edges, thereby tending to direct the two issuing jets of air from the slots towards one another. The plate, commonly referred to as a Coanda plate, has a recessed portion between the slots and which is located inwardly or below the slots to thereby create a sufficient space between the web and the plate to cause generation of air turbulence, vortexes and eddy currents in the pressurized air zone or cushion between the web and the plate, which results in increased floatation pressure for the web and increased heat transfer of the material, such as printing, which is on the web.