US 12,434,928 B2
Sheet feeding device and image forming apparatus incorporating the sheet feeding device
Sachika Tamaki, Kanagawa (JP); and Hidetoshi Kojima, Kanagawa (JP)
Assigned to Ricoh Company, Ltd., Tokyo (JP)
Filed by Sachika Tamaki, Kanagawa (JP); and Hidetoshi Kojima, Kanagawa (JP)
Filed on Oct. 25, 2023, as Appl. No. 18/494,070.
Claims priority of application No. 2022-190255 (JP), filed on Nov. 29, 2022.
Prior Publication US 2024/0174467 A1, May 30, 2024
Int. Cl. B65H 3/12 (2006.01); B65H 3/48 (2006.01); B65H 7/02 (2006.01)
CPC B65H 3/128 (2013.01) [B65H 3/48 (2013.01); B65H 7/02 (2013.01); B65H 2406/3662 (2013.01); B65H 2511/414 (2013.01); B65H 2513/50 (2013.01); B65H 2513/512 (2013.01); B65H 2801/06 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A sheet feeding device comprising:
an air blower including:
a first suction fan including a first rotor blade; and
a second suction fan including a second rotor blade, the second suction fan serially coupled to the first suction fan, and
circuitry configured to:
stop the first suction fan at a first timing;
stop the second suction fan at a second timing earlier than the first timing;
cause the first rotor blade and the second rotor blade to rotate;
cause the first rotor blade to rotate at a first number of rotations per unit time during a first period;
cause the first rotor blade to rotate at a second number of rotations per unit time larger than the first number of rotations per unit time during a second period other than the first period; and
cause the second suction fan to stop at the second timing during the second period.