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:
Sep. 28, 2004
Filed:
Dec. 20, 2002
Canon Finetech Inc., Ibaraki, JP;
Abstract
Before starting printing and/or after finishing printing, a preliminary ejection of ink is performed for a cap, which covers a recording head, until the cap is almost filled (S , S , S ). Then, a sucking operation (S , S , S ) is performed to suck ink stored in the cap. Alternatively, based on a predetermined criterion such as the accumulated number of printed dots, the number of printed pages, or a print time (S , S ), a first print operation (S ), which preliminarily ejects a predetermined amount of ink at least before starting printing or after printing, and a second print operation (S ), which preliminarily ejects more ink than the predetermined amount at least before starting printing or after printing, are alternately performed. This prevents ink from adhering to a restoring system of an ink-jet recorder and allows the sucking operation and the preliminary ejection operation to be performed smoothly.