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:
Jan. 11, 2011
Filed:
Oct. 25, 2006
Kenji Shigeno, Yokohama, JP;
Tetsuya Ishikawa, Yokohama, JP;
Haruyuki Yanagi, Machida, JP;
Kentaro Onuma, Yokohama, JP;
Kenji Shigeno, Yokohama, JP;
Tetsuya Ishikawa, Yokohama, JP;
Haruyuki Yanagi, Machida, JP;
Kentaro Onuma, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In order to stabilize a performance of a pump employed for processing in an inkjet printing apparatus such as sucking ink from a printing head with a low cost configuration and without the need of using any specific detecting unit, the following configuration is employed. Namely, a tube pump having a member with a curved surface aligned with a flexible tube for supporting the tube and a roller which moves while pressing (squeezing) the flexible tube is driven with a DC motor. To keep revolutions always constant, a current PWM control is employed for changing a power applied to the motor according to load fluctuations, and a phase of the roller is determined based on the current PWM value to manage a pressure generated by the pump and a discharge rate.