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:
Dec. 19, 1989
Filed:
Mar. 10, 1988
Glenn M Herbert, Rochester, NY (US);
Charles S Kneisel, Farmington, NY (US);
Russell McDonald, Rochester, NY (US);
Raymond A Povio, Pittsford, NY (US);
Michele D Zirilli, Walworth, NY (US);
Xerox Corporation, Stamford, CT (US);
Abstract
A top vacuum corrugation feeder employs a vacuum feedhead working in conjunction with an air knife to feed sheets from the top of a stack. The feedhead is valveless and has a vacuum applied thereto during the entire feed cycle in order to increase reliability and decrease minimum feed speed. The air knife includes trapezoidal shaped fluffer jets in front of the stack and side fluffer jets and added on the sides of the stack in order to assist the feedhead in separating severely downcurled sheets for feeding. A rotational damper member is positioned above and has a portion thereof resting on the stack for controlling sheet flutter and leakage of air from the stack sides. A belt coast control member controls the precise stopping position of vacuum belts that surround the vacuum feedhead in order to minimize multifeeding of sheets from the stack.