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:
Apr. 18, 2000
Filed:
Dec. 23, 1994
Applicant:
Inventor:
Masaharu Ikado, Suita, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B41J / ;
U.S. Cl.
CPC ...
347 23 ; 347 30 ;
Abstract
To eliminate sticking problems caused by ink thickening inside a pump while the pump is on standby, a driving force and/or a drive sequence by which, in a case in which the pump for expelling ink from the discharge port of an ink jet head is not driven for a predetermined time, the pump is driven differently from its normal operation.