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:
Nov. 09, 1993
Filed:
Sep. 02, 1992
Nicholas Frank, London, GB;
Carl R Chapman, Byfleet, GB;
Xerox Corporation, Stamford, CT (US);
Abstract
A laser printer has a circulating photoreceptor belt 20 and a transfer station 4 at which toner images are transferred from the belt to copy sheets. Each copy sheet is registered, upstream of the transfer station 4, in the nip of registration rolls 12 before being fed to the transfer station. The copy sheet is fed to the registration rolls 12 (which at that time are stationary) by feed rolls 13, 14 which continue to rotate so that a buckle is formed in the sheet to assist in removing any de-skew. When the sheet has been registered, the registration rolls 12 are rotated and, initially, are accelerated to a speed about 20% greater than the normal operating speed. That has the effect of decreasing the amount of buckle in the sheet before the trail end of the sheet reaches the registration rolls. When the buckle has been reduced, the speed of the rolls is reduced to the normal operating level, which is typically about the same as the speed of the photoreceptor belt.