US 11,718,496 B2
Sheet processing apparatus and image forming system
Yasuhiro Nakahara, Kanagawa (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Feb. 14, 2022, as Appl. No. 17/670,613.
Application 17/670,613 is a continuation of application No. 17/063,803, filed on Oct. 6, 2020, granted, now 11,279,586.
Claims priority of application No. 2019-188138 (JP), filed on Oct. 11, 2019.
Prior Publication US 2022/0162034 A1, May 26, 2022
Int. Cl. B65H 35/00 (2006.01)
CPC B65H 35/0086 (2013.01) 11 Claims
OG exemplary drawing
 
1. A sheet processing apparatus comprising:
a conveyance portion configured to convey a sheet in a sheet conveyance direction;
a punching portion configured to perform punching to the sheet conveyed by the conveyance portion, the punching portion comprising a punch that rotates around an axis extending in an intersecting direction intersecting the sheet conveyance direction;
a moving portion configured to move the punching portion toward the intersecting direction;
a first detecting portion arranged upstream of the punching portion in the sheet conveyance direction and configured to perform a detection process of outputting an output value based on a position of an edge portion in the intersecting direction of the sheet being conveyed, the first detecting portion being disposed in a position corresponding to the edge portion of the sheet; and
a control unit configured to control the conveyance portion, the punching portion and the moving portion,
wherein during punching performed to a first target position and a second target position of a single sheet, the control unit is configured to execute a first moving process of moving the punching portion in the intersecting direction by the moving portion while the sheet is being conveyed by the conveyance portion in the sheet conveyance direction based on a first output value of the first detecting portion, a first punching process of performing punching to the first target position of the sheet, being conveyed by the conveyance portion, by the punching portion which has moved in the first moving process, a second moving process of moving the punching portion in the intersecting direction by the moving portion while the sheet is being conveyed by the conveyance portion in the sheet conveyance direction based on a second output value of the first detecting portion after the first moving process, and a second punching process of performing punching to the second target position of the sheet, being conveyed by the conveyance portion, by the punching portion which has moved in the second moving process.