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:
Jul. 23, 2002
Filed:
May. 24, 2000
Hiroyuki Ishinaga, Tokyo, JP;
Masami Kasamoto, Ayase, JP;
Torachika Osada, Yamato, JP;
Shuji Koyama, Kawasaki, JP;
Haruhiko Terai, Yokohama, JP;
Genji Inada, Yokohama, JP;
Junji Tatsumi, Kawasaki, JP;
Hiroyuki Sugiyama, Sagamihara, JP;
Ken Ikegame, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In a liquid discharge head having an orifice plate in which a plurality of discharge ports for discharging liquid droplets therethrough are arranged, and a head body provided with a plurality of flow paths communicating with the plurality of discharge ports, a liquid chamber for supplying liquid to the plurality of flow paths, and a plurality of energy generation elements disposed correspondingly to the plurality of flow paths and generating energy for discharging the liquid droplets, the orifice plate being joined to the joined surface of the head body in which the communication ports of the flow paths communicating with the discharge ports are disposed, the orifice plate is formed with wall-shaped convex portions protruding from the inner peripheral portions of the discharge ports and having at least a portion thereof entering from the communication ports into the flow paths, and the width of the wall-shaped convex portions is greater in the portions thereof parallel to the row direction in which the plurality of discharge ports are arranged than in the portions thereof orthogonal to the row direction.