US 12,282,277 B2
Image forming apparatus with metallic roller correcting curl of sheet by deforming elastic roller
Naoki Ishioka, Chiba (JP)
Assigned to Canon Kabushiki Kaisha, Tokyo (JP)
Filed by CANON KABUSHIKI KAISHA, Tokyo (JP)
Filed on Sep. 11, 2023, as Appl. No. 18/464,435.
Claims priority of application No. 2022-168301 (JP), filed on Oct. 20, 2022.
Prior Publication US 2024/0134307 A1, Apr. 25, 2024
Prior Publication US 2024/0231264 A9, Jul. 11, 2024
Int. Cl. G03G 15/20 (2006.01); G03G 15/00 (2006.01); G03G 15/23 (2006.01)
CPC G03G 15/2064 (2013.01) [G03G 15/234 (2013.01); G03G 15/6502 (2013.01); G03G 15/6576 (2013.01); G03G 2215/2025 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
an image forming portion configured to form a toner image on a sheet;
a fixing portion configured to fix the toner image on the sheet on which the toner image is formed by the image forming portion;
a discharging portion to which the sheet passing through the fixing portion is discharged;
a discharge conveying path configured to convey the sheet passing through the fixing portion toward the discharging portion;
a reversing portion including a reverse conveying path branched from the discharge conveying path and configured to reverse the sheet conveyed to the reverse conveying path in a first conveying direction to a second conveying direction opposite to the first conveying direction;
a reconveying path branched from the reverse conveying path and, during double-side image forming operation in which the toner image is formed and fixed on a first surface and a second surface opposite to the first surface of the sheet, through which the sheet reversed in the reversing portion is reconveyed to the image forming portion after fixing the toner image of the first surface; and
a curl correcting portion disposed in the reconveying path and capable of correcting curl of the sheet conveyed through the reconveying path,
wherein the curl correcting portion includes (1) a first correcting portion including a first elastic roller in contact with the first surface and a first metallic roller in contact with the second surface, and (2) a second correcting portion including a second metallic roller in contact with the first surface and a second elastic roller in contact with the second surface,
wherein the first elastic roller and the first metallic roller form a first nip portion nipping and conveying the sheet, and the first metallic roller corrects the curl of the sheet by deforming the first elastic roller,
wherein the second metallic roller and the second elastic roller form a second nip portion nipping and conveying the sheet, and the second metallic roller corrects the curl of the sheet by deforming the second elastic roller, and
wherein the second correcting portion is disposed downstream of the first correcting portion with respect to a conveyance direction of the sheet.