US 11,787,652 B2
Medium transporting device, image reading apparatus, and transporting control method
Hidetoshi Masuda, Kitakyushu (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Appl. No. 17/297,597
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
PCT Filed Sep. 9, 2019, PCT No. PCT/JP2019/035391
§ 371(c)(1), (2) Date May 27, 2021,
PCT Pub. No. WO2020/110412, PCT Pub. Date Jun. 4, 2020.
Claims priority of application No. 2018-224995 (JP), filed on Nov. 30, 2018.
Prior Publication US 2022/0030129 A1, Jan. 27, 2022
Int. Cl. B65H 7/14 (2006.01); B65H 7/08 (2006.01); B65H 7/10 (2006.01); B65H 3/06 (2006.01); B65H 7/18 (2006.01)
CPC B65H 7/14 (2013.01) [B65H 3/063 (2013.01); B65H 7/08 (2013.01); B65H 7/10 (2013.01); B65H 7/18 (2013.01); B65H 2513/10 (2013.01); B65H 2513/40 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A medium transporting device comprising:
a placement tray on which a medium is placed;
a feeding roller that is in contact with a first surface of the medium, which is a surface facing the placement tray, and feeds the medium;
a separating roller that is in contact with a second surface of the
medium, which is a surface opposite to the first surface, and performs separation by nipping a document between the separating roller and the feeding roller;
a feeder that feeds the medium in a transporting direction; and
a two-dimensional sensor that is disposed to face a surface of the medium transported in the transporting direction and detects a motion of the medium in a two-dimensional coordinate system including a first axis and a second axis,
wherein the two-dimensional sensor is provided on the placement tray positioned upstream of the feeding roller and provided in a state in which the first axis and the second axis are inclined with respect to the transporting direction,
wherein a controller that receives a detection value in the first axis direction and a detection value in the second axis direction from the two-dimensional sensor stops the feeder when a difference between a movement speed in the first axis direction and a movement speed in the second axis direction detected by the two-dimensional sensor exceeds a threshold value during an operation of the feeder, and
wherein the threshold value is a value set according to deviation of the inclination angles of the first axis and the second axis with respect to the transporting direction from a target value.