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:
Nov. 16, 2004
Filed:
May. 02, 2002
Applicant:
Inventors:
Takahiko Kawasaki, Tokyo, JP;
Hiroyuki Kunii, Tokyo, JP;
Assignee:
Canon Finetech Inc., Ibaraki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J 2/165 ;
U.S. Cl.
CPC ...
B41J 2/165 ;
Abstract
An image-forming heater element and a recovery ejection heater element are driven to generate heat at the timing in which a bubble may formed in the nozzle owing to temperature difference between the inside of a printing head and the environment. Thereby, a large quantity of ink is ejected at a time. The ejection of a large quantity of the ink removes a bubble or a foreign matter from the nozzle, cleaning the nozzle in a short time.