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, 2010
Filed:
Jun. 25, 2008
Peter Alleine Fletcher, Rozelle, AU;
Kieran Gerard Larkin, Putney, AU;
Peter Alleine Fletcher, Rozelle, AU;
Kieran Gerard Larkin, Putney, AU;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A method () is described of determining characteristic of an ink jet printer (). A chart containing multiple regions or patches is printed () on a print medium () using the ink jet print (). The chart includes at least a first region printed using a first set of nozzles, and at least a second region printed using a second set of nozzles. The first and second sets of nozzles are a predetermined distance apart in the printer head of the printer (). The printing of the first and second regions is also separated by a print medium advance operation equal to the predetermined distance. This causes the first and second regions to be aligned in the direction of the print medium advance operation. The chart is then imaged using scanner () chart to form a chart image. The positions of the regions appearing in the chart image are next determined (). The spatial alignment characteristic of the printer is calculated from the distance, in the medium advance direction, between said first and second regions.