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:
Sep. 10, 2002
Filed:
May. 09, 2000
Hisao Yaegashi, Kawasaki, JP;
Isao Ebisawa, Yokohama, JP;
Atsushi Arai, Kawasaki, JP;
Hidehiko Kanda, Yokohama, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink jet recording apparatus comprises a recording head having discharge ports to discharge ink; an ink tank containing ink to be supplied to the recording head; and device for performing predischarges to stabilize ink discharges from the recording head. In this apparatus, the recording head is provided with a discharge unit to discharge plural kinds of ink, and the device for performing predischarges operates predischarges from all the discharge ports, only from the discharges ports in the vicinity of each end of the discharging units, and from all the discharge ports in that order at least for predischarges from discharging unit having relatively thin ink. With such head and device for performing predischarges, it is possible to remove mixed ink after suction recovery with a lesser amount of ink consumption, and execute a high quality recording stably at all times.