US 12,071,320 B2
Medium transport apparatus, image read apparatus, jam detection method, and storage medium
Kazuhiko Arimori, Kitakyushu (JP); Kosuke Nomoto, Shiojiri (JP); Makoto Wada, Kitakyushu (JP); Masaya Yamasaki, Kitakyushu (JP); and Hiromichi Kitsuki, Kitakyushu (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by Seiko Epson Corporation, Tokyo (JP)
Filed on Jan. 19, 2022, as Appl. No. 17/648,335.
Claims priority of application No. 2021-008554 (JP), filed on Jan. 22, 2021.
Prior Publication US 2022/0234855 A1, Jul. 28, 2022
Int. Cl. B65H 7/06 (2006.01); B41J 11/00 (2006.01); B65H 5/06 (2006.01)
CPC B65H 7/06 (2013.01) [B41J 11/006 (2013.01); B65H 5/062 (2013.01); B65H 2553/80 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A medium transport apparatus comprising:
a medium placement section on which a medium to be transported is placed;
a medium transport route along which the medium fed from the medium placement section is transported;
a plurality of transport roller pairs disposed on the medium transport route;
a motor that operates as a power source for the plurality of transport roller pairs; and
a controller that controls the motor and is configured to perform a jam detection process to detect whether the medium jams on the medium transport route by referring to a drive load on the motor and a threshold related to the drive load, wherein
the plurality of transport roller pairs are provided with respective detectors disposed on the medium transport route, the detectors being configured to detect the medium,
the controller varies the threshold based on detection information from the detectors,
the controller determines how many transport roller pairs are transporting the medium, based on the detection information from the detectors, and
the controller sets the threshold to a larger value as a number of transport roller pairs that are transporting the medium increases and sets the threshold to a lower value as the number of transport roller pairs transporting the medium decreases.