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:
Aug. 07, 2001
Filed:
Dec. 09, 1997
Applicant:
Inventors:
Satoshi Wada, Machida, JP;
Nobuhito Yamaguchi, Inagi, JP;
Makoto Akahira, Kawasaki, JP;
Hideto Yokoi, Yokohama, JP;
Hiroshi Fujiike, Yokohama, JP;
Tadao Saito, Machida, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J 2/195 ; B41J 2/9393 ;
U.S. Cl.
CPC ...
B41J 2/195 ; B41J 2/9393 ;
Abstract
A method of instantly measuring the amount of ink discharged from a nozzle of an ink-jet type printhead in a single discharging operation comprises: a density measuring step of measuring the density of an ink dot formed by ink discharged from the printhead onto a glass plate,and a determining step of determining the amount of the discharged ink on the basis of the density of the ink dot measured in the measuring step.