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. 31, 2004
Filed:
Jun. 20, 2001
Takayuki Ninomiya, Ichikawa, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
This invention provides a printing apparatus which has an ink ejection head capable of forming an image at high resolution and still can reliably identify a location where an ink ejection error has occurred without using an expensive image reading device. This printing apparatus has a distance adjusting device to change a distance between the ink ejection head and the print medium, and a controller to set a plurality of different distances by controlling the distance adjusting device. The controller controls the distance adjusting device to selectively set either a first distance that produces a normal printed image having within a predetermined range a landing error on the print medium of ink droplets ejected from the print head or a second distance that produces a landing error greater than the predetermined range.