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:
Jul. 03, 2007
Filed:
Feb. 22, 2005
Kohzo Hara, Ebina, JP;
Kohzo Hara, Ebina, JP;
Fuji Xerox Co., Ltd., Tokyo, JP;
Abstract
An inkjet head inspection device inspects an inkjet head including plural nozzles that eject ink droplets, plural ink reservoirs that contain the ink to be ejected from the plural nozzles, and plural piezoelectric elements that exert pressure on the ink reservoirs to force the ink droplets out of the nozzles. The inkjet head inspection device has a differential amplifier section that amplifies a differential voltage between respective ground-side electrodes or opposite-side electrodes of the piezoelectric elements corresponding to two nozzles to be inspected, when a drive voltage application section applies a drive voltage to each of the piezoelectric elements, and a decision section that decides whether an ink jet malfunction occurs in the two nozzles to be inspected, based on the differential voltage furnished from the differential amplifier section.