US 12,344,018 B2
Registration of duplex printed sheets in a sheet stacking device
Anne A. Wind, Venlo (NL); Ronnie E. A. Blom, Venlo (NL); Christopher J. Borchert, Venlo (NL); and Müge Artar, Venlo (NL)
Assigned to CANON PRODUCTION PRINTING HOLDING B.V., Venlo (NL)
Filed by Canon Production Printing Holding B.V., Venlo (NL)
Filed on Nov. 24, 2023, as Appl. No. 18/518,825.
Claims priority of application No. 22211355 (EP), filed on Dec. 5, 2022.
Prior Publication US 2024/0181790 A1, Jun. 6, 2024
Int. Cl. B41J 3/60 (2006.01); B41J 11/00 (2006.01)
CPC B41J 3/60 (2013.01) [B41J 11/0095 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method of printing and stacking sheets comprising the steps of:
registering a sheet on a first pass of the sheet past a skew angle correction system;
moving the registered sheet on the first pass past a printhead assembly for printing a front image on a first side of the sheet;
detecting a skew angle between a first edge and a second edge of the sheet;
registering the sheet on a second pass of the sheet past the skew angle correction system;
moving the registered sheet on the second pass past the printhead assembly for printing a back image on a second side of the sheet, wherein in the first and second passes the respective front and back images have been aligned with respect to the first edge of the sheet by and applying the skew angle; and
after the second pass, stacking the sheet, wherein the first edge of the sheet is registered to a registration element of a sheet stacking device having a predetermined stacking reference direction.