US 12,216,424 B2
Sheet type discrimination device, sheet type discrimination method, and sheet type discrimination program
Daisuke Kobayashi, Hino (JP); Shohei Dokiya, Hino (JP); Makoto Ooki, Toyohashi (JP); Takafumi Yuasa, Hachioji (JP); Takaki Uemura, Seto (JP); and Masahiko Takahashi, Hino (JP)
Assigned to KONICA MINOLTA, INC., Tokyo (JP)
Filed by KONICA MINOLTA, INC., Tokyo (JP)
Filed on Jul. 27, 2023, as Appl. No. 18/227,017.
Claims priority of application No. 2022-132537 (JP), filed on Aug. 23, 2022.
Prior Publication US 2024/0069478 A1, Feb. 29, 2024
Int. Cl. G03G 15/00 (2006.01)
CPC G03G 15/5029 (2013.01) 13 Claims
OG exemplary drawing
 
1. A sheet type discrimination device comprising:
a first light source unit that irradiates a sheet with light having a first wavelength and light having a second wavelength;
a detection unit that detects light from the sheet and acquires a detection value based on the light; and
a control unit that derives a determination result of a type of the sheet by using the detection value, wherein
the first light source unit and the detection unit are located on a same side with respect to the sheet,
the detection value includes: a first detection value based on light from the sheet when the sheet is irradiated with light having the first wavelength; and a second detection value based on light from the sheet when the sheet is irradiated with light having the second wavelength, and
the control unit
discriminates first-type recycled paper by first processing using the first detection value, and
discriminates second-type recycled paper different from the first-type recycled paper by second processing using the second detection value.