US 12,011,917 B2
Image forming apparatus that detects status of transport belt that transports recording medium
Hitoshi Hayamizu, Osaka (JP); Daijiro Ueno, Osaka (JP); Tetsuya Ueno, Osaka (JP); Hisaji Kawai, Osaka (JP); and Haruki Sayama, Osaka (JP)
Assigned to KYOCERA Document Solutions Inc., Osaka (JP)
Filed by KYOCERA Document Solutions Inc., Osaka (JP)
Filed on Oct. 25, 2022, as Appl. No. 17/972,627.
Claims priority of application No. 2021-176865 (JP), filed on Oct. 28, 2021.
Prior Publication US 2023/0132842 A1, May 4, 2023
Int. Cl. B41J 11/00 (2006.01); B41J 29/17 (2006.01); B41J 29/377 (2006.01); G01N 21/89 (2006.01); G01N 29/04 (2006.01); G01N 29/24 (2006.01)
CPC B41J 11/0095 (2013.01) [B41J 11/007 (2013.01); B41J 29/17 (2013.01); B41J 29/377 (2013.01); G01N 21/89 (2013.01); G01N 29/04 (2013.01); G01N 29/2437 (2013.01); G01N 2291/023 (2013.01); G01N 2291/048 (2013.01); G01N 2291/102 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
an image forming device that forms an image on a recording medium;
an endless transport belt that transports the recording medium placed on a surface thereof, to an image forming position where the image forming device forms the image on the recording medium;
an optical sensor including a light emitting element that emits light to the transport belt, and a photodetector that receives the light reflected by the transport belt;
an ultrasonic sensor including a transmitter that transmits ultrasonic wave to the transport belt, and a receiver that receives the ultrasonic wave transmitted through the transport belt; and
a controller that decides whether an output from each of the photodetector of the optical sensor and the receiver of the ultrasonic sensor represents a normal value or an abnormal value, and executes predetermined control, depending on a combination of decision results about the respective outputs from the photodetector and the receiver.