US Patent No. 9,469,129

PRINTING METHOD AND APPARATUS FOR PERFORMING CONVEYANCE CONTROL USING MARKS IN NON-IMAGE AREAS


Patent No. 9,469,129
Issue Date October 18, 2016
Title Printing Method And Apparatus For Performing Conveyance Control Using Marks In Non-image Areas
Inventorship Seiji Suzuki, Ebina (JP)
Assignee Canon Kabushiki Kaisha, Tokyo (JP)

Claim of US Patent No. 9,469,129

6. A printing apparatus comprising:
a conveying unit configured to convey a continuous sheet;
a printing unit configured to perform a first printing so as to alternately arrange image area and a non-image area on the
continuous sheet in conveyance by the conveying unit and form marks in the respective non-image areas and perform a second
printing subsequently to the first printing;

a detecting unit configured to detect each of the marks that are formed in the first printing; and
a control unit configured to obtain a correction factor for the second printing regarding a conveyance error of the conveying
unit for conveying the continuous sheet in the respective image areas in the first printing, based on a measured conveyance
amount in response to a detection of the respective marks with the detecting unit and a theoretical conveyance amount, the
control unit further configures to update the correction factor by multiplying a previous correction factor by a new correction
factor each time the new correction factor is obtained in the respective image areas in the first printing, wherein the correction
factor obtained in the first printing is used by the conveying unit to perform sheet conveyance in the second printing.