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, 2012
Filed:
May. 11, 2011
Takatsuna Aoki, Yokohama, JP;
Hideo Kanno, Yokohama, JP;
Takatsuna Aoki, Yokohama, JP;
Hideo Kanno, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
The discharging state of an inkjet recording head can be detected. The head includes a passage communicating with a discharge port for discharging ink, a discharging heater provided in the passage for generating energy to discharge ink from the discharge port, and a detecting unit provided in the passage for detecting a temperature of ink that changes in accordance with heat energy generated by the detecting unit and a flow of ink in the passage. The method includes supplying power to the heater, subsequently applying a first pulse current to the detecting unit, then applying a second pulse current with a smaller pulse width, and measuring and comparing an output signal from the detecting unit with a threshold to measure the ink temperature.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile