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. 10, 2001
Filed:
Feb. 18, 1998
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J 2/938 ; B41J 2/205 ; B41J 2/14 ;
U.S. Cl.
CPC ...
B41J 2/938 ; B41J 2/205 ; B41J 2/14 ;
Abstract
Small dots and large dots are recorded with a sufficient difference between them by such structure that a plurality of heat generating elements are disposed inside of each nozzle. A single pulse is applied to one heat generating element for recording of a small dot, whereas a single pulse and a divided pulse are applied to two heat generating elements for recording of a large dot. When the divided pulse is applied to the heat generating element, a larger amount of the ink is ejected than upon application of the single pulse. Therefore, the sufficient difference can be generated between the sizes of dots by applying the driving pulses as described above.