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:
May. 27, 2003
Filed:
Feb. 09, 2001
Canon Kabushiki Kaisha, , JP;
Abstract
An ink jet recording head is provided with a plurality of discharge ports for discharging recording liquid, a discharge port plate having the discharge ports therefor, a liquid chamber for retaining the recording liquid, a plurality of discharge energy generating elements for discharging the recording liquid, a substrate having the plurality of discharge energy generating elements on one surface thereof, and a plurality of liquid flow paths extended in one direction for communicating the liquid chamber and the discharge ports, the liquid flow paths including the discharge energy generating elements therein and having the rectangular sectional configuration. The sectional shape of each of the discharge ports is circular on the end portion thereof on the recording liquid discharge side and the sectional area of the discharge port end portion connected with the liquid flow path being larger than that of the end portion of discharge port on the recording liquid discharge side, and the sectional shape of the discharge port is rectangular, while the discharge port is tapered to change the sectional shape thereof from being rectangular to circular. This ink jet recording head is effective in discharging recording liquid stably at higher speeds to form images in higher precision.