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. 24, 1993
Filed:
Nov. 15, 1991
Applicant:
Inventor:
Eric Vannerson, Don Mills, CA;
Assignee:
Delphax Systems, Canton, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346159 ; 346158 ; 358300 ;
Abstract
A driver for the finger electrodes in a charge-deposition print cartridge controls the finger potential between a printing and a non-printing state. All fingers are reset at once by a common power source, to which each is connected by a diode. Charge storage provided in each finger electrode line keeps the finger at a back-biased potential without deterioration by crosstalk until it is next positively driven to a printing state. Binary-coded drive data is checked for errors at the input, and the charge delivered to each finger is monitored at the output to identify data transmission or cartridge electrode faults.