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:
Oct. 16, 1979
Filed:
Feb. 28, 1978
Applicant:
Inventors:
Edward T Osborne, Boulder, CO (US);
Danny A Van Hook, Boulder, CO (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ;
U.S. Cl.
CPC ...
346 75 ;
Abstract
Fouling of an electrostatic ink jet head is sensed and causes shutoff of the head and of the associated electronics. The fouling is sensed by detecting contamination of the charge electrodes or of the deflection plates by conductive ink, the detection being by sensitive circuitry employing diodes.