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. 13, 2002
Filed:
Feb. 14, 2001
Applicant:
Inventors:
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03G 1/500 ; G03G 1/508 ; G03G 1/510 ;
U.S. Cl.
CPC ...
G03G 1/500 ; G03G 1/508 ; G03G 1/510 ;
Abstract
The invention relates to an electrographic printing or photocopying device and method. A toner mark ( ) is provided on a photoconductive drum and printed with toner using a developing station. The toner mark ( ) is scanned by a sensor at two points of measurement (a ,a ). The amount of toner in a developing mixture consisting of two components depends upon the difference (&Dgr;U) or the quotient of the amount of the signals of the sensor at both points of measurement. A device which is also disclosed enables the exact length of the toner mark ( ) to be determined.