Image forming apparatus with secondary transfer section having rubber backup roller
AssigneeKonica Minolta Business Technologies, Inc.
InventorShinichi Nagao
Life of this patent
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Abstract
An image forming apparatus including a secondary transfer section of a roller transfer method which transfers a toner image supported on an intermediate transfer belt onto a sheet of paper, wherein the image forming apparatus includes a transfer roller and a backup roller which suspends the above intermediate transfer belt, and opposes to the above transfer roller via the intermediate transfer belt, the surface of the above backup roller has Asker C hardness of 10 degrees or more and less than 45 degrees, and a driving roller driving the above intermediate transfer belt is arranged downstream of a primary transfer section transferring a toner image onto the intermediate transfer belt and upstream of the above secondary transfer section.
Claims5
An image forming apparatus comprising:
- an intermediate transfer belt;
- a primary transfer section which transfers a toner image onto the intermediate transfer belt;
- a secondary transfer section which comprises a transfer roller and a backup roller and which transfers the toner image held on the intermediate transfer belt onto a sheet, the backup roller suspending the intermediate transfer belt and being opposed to the transfer roller with the intermediate transfer belt positioned between the transfer roller and the backup roller;
- and
- a driving roller which is arranged downstream of the primary transfer section and upstream of the secondary transfer section in a moving direction of the intermediate transfer belt and which drives the intermediate transfer belt,
- wherein the backup roller comprises sponge rubber and solid rubber formed on the sponge rubber, and a surface of the backup roller has Asker C hardness of 10 degrees or more, and less than 45 degrees.
Dependencies are inferred from the claim text.