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. 05, 1991
Filed:
Apr. 04, 1990
Applicant:
Inventors:
Roger H Therrien, Hanover, MA (US);
John R Rumsey, Oxnard, CA (US);
Assignee:
Delphax Systems, Randolph, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346155 ; 346159 ;
Abstract
An improved controller for a printhead having crossed first and second sets of electrodes determines whether any electrode of the second set is to be activated, and disables an electrode of the first set if it determines that no second electrode is active. By reducing the number of times the first electrodes are actuated printhead life and print quality are improved. In one embodiment, the controller ORs the second electrode control signals to develop an output which enables the first electrodes.