US 12,234,119 B2
Medium conveying apparatus to correct skew of medium using second roller while moving first roller to be spaced apart from medium
Shogo Yoshita, Kahoku (JP)
Assigned to PFU LIMITED, Kahoku (JP)
Filed by PFU LIMITED, Kahoku (JP)
Filed on Dec. 8, 2021, as Appl. No. 17/643,382.
Claims priority of application No. 2021-008739 (JP), filed on Jan. 22, 2021.
Prior Publication US 2022/0234856 A1, Jul. 28, 2022
Int. Cl. B65H 9/00 (2006.01); B65H 1/04 (2006.01); B65H 3/06 (2006.01); B65H 7/08 (2006.01); B65H 7/18 (2006.01); B65H 7/20 (2006.01); B65H 9/18 (2006.01)
CPC B65H 9/002 (2013.01) [B65H 1/04 (2013.01); B65H 3/0684 (2013.01); B65H 7/08 (2013.01); B65H 7/18 (2013.01); B65H 7/20 (2013.01); B65H 9/18 (2013.01); B65H 2301/331 (2013.01); B65H 2553/40 (2013.01); B65H 2553/51 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A medium conveying apparatus comprising:
a first roller to convey a medium;
a solenoid or a motor, to move the first roller between a first position in contact with the medium and a second position spaced apart from the medium;
a second roller located on a downstream side of the first roller in a medium conveying direction to convey the medium;
a plurality of first medium sensors located apart from each other in a direction perpendicular to the medium conveying direction and on a downstream side of the second roller;
an imaging device located on a downstream side of the first medium sensors in the medium conveying direction;
a second medium sensor located between the first medium sensors and the imaging device in the medium conveying direction; and
a processor to
determine whether a skew of the conveyed medium has occurred, and
control the solenoid or the motor to move the first roller from the first position to the second position, and execute a correction of the skew of the conveyed medium for orienting a front end of the medium to a downstream side of the medium conveying direction, using the second roller when it is determined that the skew of the conveyed medium has occurred, and
control the solenoid or the motor to return the first roller from the second position to the first position so that the first roller is in contact with the conveyed medium the skew of which is corrected after the correction of the skew of the medium is started, for orienting the front end of the medium to the downstream side of the medium conveying direction, wherein
the processor determines whether the skew of the conveyed medium has occurred based on output signals from the first medium sensors, and wherein
the processor controls the solenoid or the motor to return the first roller to the first position when the conveyed medium passes through a position of the second medium sensor.