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:
Sep. 15, 2009
Filed:
Sep. 27, 2006
Hiroyuki Ootsuka, Kanagawa, JP;
Hiroyuki Ootsuka, Kanagawa, JP;
Fujifilm Corporation, Tokyo, JP;
Abstract
The liquid ejection apparatus comprises: a liquid ejection head including a nozzle which ejects liquid, a pressure chamber provided to correspond to the nozzle, a pressure generating element which is disposed on a first wall surface of the pressure chamber and adjusts pressure in the pressure chamber, and a determination element which is disposed on a second wall surface of the pressure chamber and generates a first determination signal corresponding to the pressure in the pressure chamber adjusted by the pressure generating element; a threshold value setting device which sets a threshold value in accordance with a waveform of the first determination signal generated by the determination element; a comparing device which acquires a comparison result obtained by comparing the first determination signal with the threshold value which is set by the threshold value setting device; and an evaluation device which acquires an evaluation result obtained by evaluating a size of an air bubble present in the pressure chamber according to the comparison result acquired by the comparing device.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile