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:
Feb. 18, 2014
Filed:
Sep. 19, 2011
Satoshi Oikawa, Yokohama, JP;
Yusuke Kiyokawa, Shiki, JP;
Kenji Kitabatake, Kawasaki, JP;
Takuya Iwano, Fuchu, JP;
Satoshi Oikawa, Yokohama, JP;
Yusuke Kiyokawa, Shiki, JP;
Kenji Kitabatake, Kawasaki, JP;
Takuya Iwano, Fuchu, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid ejection apparatus has an ejection orifice ejecting a liquid, a liquid storage section storing the liquid, a conductive communication path forming member forming a communication path to supply the liquid from the liquid storage section to the ejection orifice, and an electrode provided inside the liquid storage section and used to detect a remaining amount of the liquid. The communication path is electrically connected to the electrode, and the electrical resistance value between the electrode and the communication path contacting the liquid when the liquid is present in the liquid storage section is smaller than the electrical resistance value between the electrode and the communication path when the liquid is not present in the liquid storage section. A recording apparatus incorporating the above features can detect the presence or absence of ink in the recording head with high precision without increasing the size of the recording head.