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:
Feb. 24, 1981
Filed:
Mar. 22, 1979
Petrus J Ophey, Grubbenvorst, NL;
Oce-van der Grinten N.V., Venlo, NL;
Abstract
For control of an indirect electrophotographic copier employing an endless photoconductive belt having thereon at least one marking which excites a sensor each time the marking passes a fixed point in the belt path, the movement of the belt is measured electronically by a pulse generator coupled to a belt transport roller and a counter. Any difference between an electronically registered length of the belt and its actual length at a moment of sensor excitation is registered in a memory. At the end of a copying run pulses from the generator are diverted to the memory which then causes the difference to be corrected by discontinuation of the driving of the belt at an earlier or later moment.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile