US 12,306,568 B2
Image forming apparatus
So Matsumoto, Saitama (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Nov. 1, 2023, as Appl. No. 18/499,347.
Application 18/499,347 is a division of application No. 17/583,251, filed on Jan. 25, 2022, granted, now 11,841,631.
Claims priority of application No. 2021-032091 (JP), filed on Mar. 1, 2021.
Prior Publication US 2024/0061367 A1, Feb. 22, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G03G 15/00 (2006.01); H04N 1/00 (2006.01)
CPC G03G 15/6579 (2013.01) [H04N 1/00602 (2013.01); H04N 1/00612 (2013.01); H04N 1/00652 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
an image forming portion configured to form an image on a sheet;
a reverse roller pair configured to feed the sheet, on which the image is formed by the image forming portion, in a first direction and then to reverse and feed the sheet in a second direction that is opposite to the first direction;
a reverse motor configured to rotate in a first rotational direction and cause the reverse roller pair to feed the sheet in the first direction, and to rotate in a second rotational direction opposite to the first rotational direction and cause the reverse roller pair to feed the sheet in the second direction; and
a controller configured to control rotation of the reverse motor in a first feeding mode in which a sheet with a first length is fed and in a second feeding mode in which a sheet with a second length shorter than the first length is fed,
wherein the controller executes the first feeding mode in which the reverse motor rotating in the first rotational direction is accelerated from zero speed to a predetermined speed before a leading end of the sheet reaches the reverse roller pair, and then the reverse motor rotating in the first rotational direction is accelerated from the predetermined speed to a first speed faster than the predetermined speed after the leading end of the sheet reaches the reverse roller pair and a rear end of the sheet passes through the image forming portion, and
wherein the controller executes the second feeding mode in which the reverse motor rotating in the first rotational direction is accelerated from zero speed to a second speed slower than the first speed before a leading end of the sheet reaches the reverse roller pair.