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:
Aug. 29, 1978
Filed:
Jan. 21, 1977
Petrus J Ophey, Grubbenvorst, NL;
Oce-van der Grinten N.V., Venlo, NL;
Abstract
An electrophotographic copying apparatus employing a moving endless photoconductive belt for image formation and image transfer is provided with a control system whereby images are formed on the belt at fixed locations relative to at least one marking on the belt, without need to make the belt precisely to a certain length or to provide more than a single marking which, if the belt is made endless by a seam, can be located near the seam to enable skipping of the seam in the imaging operations. The control system includes a detector for emitting a signal pulse upon being passed by a marking and two substantially identical partial circuits, each operable to emit control signals for activating or inactivating processing stations that together form a processing zone traversed by the belt, and a switching circuit for starting the operation of one of the partial circuits in response to the signal pulse while the other partial circuit is and continues operating to complete the processing of the last imaging belt portion that entered the processing zone before the emission of the signal pulse.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile