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. 24, 2007
Filed:
Mar. 25, 2004
Takahiro Yamada, Hitachinaka, JP;
Shinya Kobayashi, Hitachinaka, JP;
Hitoshi Kida, Hitachinaka, JP;
Kunio Satou, Hitachinaka, JP;
Takahiro Yamada, Hitachinaka, JP;
Shinya Kobayashi, Hitachinaka, JP;
Hitoshi Kida, Hitachinaka, JP;
Kunio Satou, Hitachinaka, JP;
Ricoh Printing Systems, Ltd., Tokyo, JP;
Abstract
When an refresh ink droplet ejected from a nozzle and deflected by an inclined electric field impinges on a orifice electrode/ink receiving member, electric charge is discharged from the refresh ink droplet, thereby an electric current is generated. A current-voltage converter/amplifier detects the electric current and outputs a detection signal. A defective-condition determining circuit determines an ejection condition of a nozzle element based on voltage value of the detection signal.