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:
Jun. 26, 2012
Filed:
Dec. 11, 2009
Eisuke Nishitani, Tokyo, JP;
Toru Yamane, Yokohama, JP;
Tomoyuki Inoue, Tokyo, JP;
Ken Tsuchii, Sagamihara, JP;
Eisuke Nishitani, Tokyo, JP;
Toru Yamane, Yokohama, JP;
Tomoyuki Inoue, Tokyo, JP;
Ken Tsuchii, Sagamihara, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A liquid ejection head includes ejection orifices allowing liquid to be ejected therethrough, passages communicating with the ejection orifices and the pressure chambers each accommodating an energy generating element generating energy for ejecting the liquid therein, a supply port supplying the liquid to the passages, and a filter including substantially cylindrical members between the supply port and passages and having openings. Each of the ejection orifices has a substantially circular cross section having larger and smaller diameters substantially perpendicularly to its liquid ejecting direction. Each of the openings has a substantially rectangular cross section having longer and shorter sides substantially perpendicularly to its liquid supplying direction. The relationships D>L, D<D, and D>L≧Dare satisfied where Dis the smaller diameter, Dis the larger diameter, Lis the shorter side, and Lis the longer side.