US 7,600,848 B2
Printing apparatus and method for setting adjustment values for inks having low detection sensitivity
Minoru Teshigawara, Yokohama (Japan); Kiichiro Takahashi, Kawasaki (Japan); Osamu Iwasaki, Tokyo (Japan); Satoshi Seki, Kawasaki (Japan); and Naoji Otsuka, Yokohama (Japan)
Assigned to Canon Kabushiki Kaisha, Tokyo (Japan)
Filed on Jun. 09, 2008, as Appl. No. 12/135,437.
Application 12/135437 is a division of application No. 10/929685, filed on Aug. 31, 2004, granted, now 7,396,099, filed on Jul. 08, 2008.
Claims priority of application No. 2003-313178 (JP), filed on Sep. 04, 2003.
Prior Publication US 2008/0273051 A1, Nov. 06, 2008
This patent is subject to a terminal disclaimer.
Int. Cl. B41J 29/393 (2006.01); B41J 29/38 (2006.01); B41J 2/145 (2006.01)
U.S. Cl. 347—19  [347/12; 347/43; 347/47] 7 Claims
OG exemplary drawing
 
1. A printing apparatus for printing on a printing medium by using a print head capable of ejecting first and second color inks to the printing medium, the apparatus comprising:
a control unit that controls printing of a pattern on the printing medium by using the print head, the pattern being used to acquire adjustment values for printing positions in a print operation using the first color ink; and
an optical sensor that detects optical characteristics of the printing medium on which the pattern is printed;
wherein said control unit sets an adjustment value for adjusting the printing positions in the print operation using the first color ink, on the basis of a result of detection by said optical sensor,
wherein the first color ink is detected by said optical sensor at a detection sensitivity higher than that of the second color ink,
wherein the pattern is printed by using only the first color ink, and
wherein said control unit substitutes and sets the adjustment value for adjusting the printing positions in the print operation using the first color ink for an adjustment value for adjusting printing positions in a print operation using the second color ink.