Image forming apparatus
AssigneeKYOCERA Document Solutions Inc.
InventorsKoji Uno, Keisuke Oba, Yasuhiro Michishita
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Abstract
An image forming apparatus includes a plurality of image carriers, a charging device, an exposure device, a development device, and an intermediate transfer belt. The image carrier has a surface on which an amorphous silicon photosensitive layer is formed. The intermediate transfer belt is a plastic belt having a surface resistivity of 9.5 to 10.5 (log Ω/square). An offset amount of the primary transfer roller from the image carrier is 0 to 2 (mm), a contact surface pressure between the image carrier and the intermediate transfer belt is 0.5 to 1.5 (gf/mm2), and a charge density of primary transfer current that flows when the primary transfer voltage is applied to the primary transfer roller is 0.016 to 0.040 (μC/cm2).
Claims3
An image forming apparatus comprising:
- a plurality of image carriers each of which has a surface on which an amorphous silicon photosensitive layer is formed;
- a charging device that charges the surface of the image carrier;
- an exposure device that exposes the surface of the image carrier charged by the charging device, so as to form an electrostatic latent image on the surface of the image carrier;
- a development device that develops the electrostatic latent image formed on the surface of the image carrier into a toner image, using developer containing toner;
- an intermediate transfer belt onto which the toner images formed on the image carriers are primarily transferred sequentially;
- a plurality of primary transfer rollers each of which is pressed to contact the image carrier via the intermediate transfer belt;
- and
- a secondary transfer roller that secondarily transfers the toner images, which have been primarily transferred onto the intermediate transfer belt, to the recording medium, wherein
- the intermediate transfer belt is a plastic belt having a surface resistivity of 9.5 to 10.5 log Ω/square,
- an offset amount of the primary transfer roller from the image carrier is 0 to 2 mm,
- a contact surface pressure between the image carrier and the intermediate transfer belt is 0.5 to 1.5 gf/mm2, and
- a charge density of primary transfer current that flows when the primary transfer voltage is applied to the primary transfer roller is 0.016 to 0.040 μC/cm2.
Dependencies are inferred from the claim text.