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. 27, 2001
Filed:
Nov. 25, 1996
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 printing system to perform printing by ejecting ink toward a printing medium by employing a printing head having ink passages for ejecting ink through ejection openings and a common ink chamber supplying the ink into the ink passages. The system includes detection of a peripheral temperature of the printing head, detection of a variation of a temperature within the printing head, count of a number of times of ejection of the ink, performance of a suction recovery operation for sucking and discharging at least the ink from the printing head through the ejection openings, set of a timing for a next suction recovery operation based on the peripheral temperature of the printing head, the temperature variation within the printing head, and the number of times of ejection of the ink, correction of the number of times of ejection of the ink for setting the timing for the next suction recovery operation based on a difference between the peripheral temperature of the printing head and the temperature variation within the printing head, performance of preparatory ejection for ejecting the ink through the ejection openings toward an object other than the printing medium, and set of a timing for a next preparatory ejection based on the peripheral temperature of the printing head and the temperature variation within the printing head.