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:
Mar. 09, 2004
Filed:
Sep. 13, 2002
Toshiharu Inui, Kanagawa, JP;
Masaya Uetsuki, Kanagawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A recovery method for an ink jet printing apparatus is provided which makes it possible to use as much ink in the ink tank as possible and minimize the residual ink volume at time of a tank replacement. The recovery method for keeping an ejection performance of the print head in appropriate condition by performing a recovery operation of discharging ink from the print head, therefore, includes the steps of: detecting a residual ink volume in the ink tank; and controlling a discharge ink volume to be discharged by the recovery operation when the residual ink volume detected by the residual ink volume detection step is less than or equal to a predetermined value.