US 12,292,705 B2
Image forming apparatus
Akira Shimodaira, Kanagawa (JP); and Satoshi Tejima, Kanagawa (JP)
Assigned to FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed by FUJIFILM Business Innovation Corp., Tokyo (JP)
Filed on Aug. 3, 2022, as Appl. No. 17/880,636.
Claims priority of application No. 2022-052244 (JP), filed on Mar. 28, 2022.
Prior Publication US 2023/0305444 A1, Sep. 28, 2023
Int. Cl. G03G 15/16 (2006.01); G03G 15/01 (2006.01)
CPC G03G 15/161 (2013.01) [G03G 15/0131 (2013.01); G03G 2215/0132 (2013.01); G03G 2215/1623 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An image forming apparatus comprising:
a conveyance unit that conveys a recording medium in contact with one surface of the recording medium along a conveyance path;
a first image forming group that is provided on the other surface side of the recording medium in the conveyance path, and includes a plurality of image forming sections that form a toner image;
a second image forming group that is provided on a downstream side of the first image forming group in the conveyance path on the other surface side of the recording medium in the conveyance path, and includes a plurality of image forming sections that form a toner image;
a first intermediate transfer body that is provided on the downstream side of the first image forming group in the conveyance path, and to which the toner image formed by the plurality of image forming sections of the first image forming group is primarily transferred;
a second intermediate transfer body that is provided on an upstream side of the second image forming group in the conveyance path, and to which the toner image formed by the plurality of image forming sections of the second image forming group is primarily transferred;
a first transfer unit that secondarily transfers the toner image from the first intermediate transfer body to the other surface of the recording medium conveyed by the conveyance unit; and
a second transfer unit that secondarily transfers the toner image from the second intermediate transfer body to the other surface of the recording medium conveyed by the conveyance unit,
wherein the first image forming group, the first intermediate transfer body, the second intermediate transfer body, and the second image forming group are arranged in this order from the upstream side in the conveyance path, and
wherein image forming groups including the first image forming group and the second image forming group are not located between the first intermediate transfer body and the second intermediate transfer body,
wherein the conveyance unit is a conveyor belt wound around a tension roll and a drive roll, and
a distance between the first transfer unit and the second transfer unit in the conveyor belt is set to an integral multiple of a peripheral surface length of the drive roll, and
the distance between the first transfer unit and the second transfer unit in the conveyor belt and the peripheral surface length of the drive roll are set to be the same length.