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:
Oct. 13, 2009
Filed:
Jul. 24, 2003
Ink jet printer in which a best test pattern printed in a recording medium is automatically selected
Yoshinari Morimoto, Nagoya, JP;
Yoshinari Morimoto, Nagoya, JP;
Brother Kogyo Kabushiki Kaisha, Nagoya, JP;
Abstract
In an ink jet printer, upon a start of a go/return printing position automatic correction control, on the basis of plural preset test pattern numbers, plural kinds of test patterns are printed while a shift amount of return-printing is changed, and each of the test patterns are read by a medium sensor and converted into digital data. For each test pattern, a maximum value, a minimum value, and a center value of AD values (digital numerical values of gradation data) are determined, an amplitude value that is the sum of deviations that are the differences between the AD values and the center value are calculated, and a test pattern having a smallest amplitude value is judged best. A shift amount and a test pattern corresponding to the test pattern having the smallest amplitude value are printed.