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:
Sep. 17, 1991
Filed:
Apr. 27, 1989
Ronald R Wierszewski, Henrietta, NY (US);
Richard F Scarlata, Rochester, NY (US);
Thomas Acquaviva, Penfield, NY (US);
James F Matysek, Fairport, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
An air knife pressure calibration system and method for a bottom vacuum corrugation recirculating document feeder includes measuring the air pressure and adjusting an air pressure control valve of the air knife to a predetermined value. This valve position is stored in a non-volatile memory and can be used to create a table of values for various document stack heights by adding constant values that represent additional documents to the one document value. Thus, customized valve positions are accomplished that are machine as well as altitude sensitive.