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:
Jul. 03, 1984
Filed:
Sep. 16, 1981
William H Ashbee, Boulder, CO (US);
Mark A Beran, Niwot, CO (US);
Donald F Colglazier, Longmont, CO (US);
Donovan M Janssen, Boulder, CO (US);
John P Mantey, Boulder, CO (US);
Ronald J Martin, Loveland, CO (US);
Gerald P Patch, Boulder, CO (US);
Larry E Rittenhouse, Boulder, CO (US);
James A Valent, Longmont, CO (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A servo-controlled recirculating automatic document feeder (RADF) includes a plurality of independently driven document transport devices. A picker mechanism separates documents in seriatim from a stack. An entry turnaround transport device buffers and delivers picked documents to a platen transport device for exposure. After exposure, the document is transported along a simplex or duplex path for duplex or simplex copying. The document is then buffered in an exit turnaround transport device and is subsequently returned to the stack. Each transport device is independently driven by a motor and a closed-loop servo. A common reference oscillator generates source signals for the servo-loops. A microcomputer operates on the source signals and generates reference signals for driving the transport devices.