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. 14, 2015
Filed:
Oct. 12, 2012
Canon Kabushiki Kaisha, Tokyo, JP;
CANON KABUSHIKI KAISHA, Tokyo, JP;
Abstract
Even when a pressurizing operation is performed, degradation of the quality of a printing head due to wiping of a nozzle surface is suppressed. In an ink jet printing apparatus including a printing head, an ink tank, a first pump arranged in an ink supplying path for supplying ink from the ink tank to the printing head, a second pump arranged in an ink collecting path for collecting ink from the printing head to the ink tank, a switch valve arranged between the printing head and the second pump, and a cleaning mechanism, by driving the first pump in a state where the switch valve is closed, the ink is discharged from the nozzle row, and after driving of the second pump in a state where the switch valve is opened, the cleaning mechanism is caused to clean the printing head.