Patent ID: 9639034
Date: 2017-05-02
CPC Classifications: G03G

Claim:
1. An image forming apparatus comprising: a carrier configured to carry a toner image formed by a toner, the toner including a toner body and an external additive, a circularity of the external additive being about 0.5 to about 0.9; a transfer member configured to hold a recording medium between the transfer member and the carrier, the transfer member being configured to transfer the toner image to the recording medium; and a removing member that includes a contact portion, the contact portion being configured to contact the transfer member, the removing member being configured to remove toner that adheres to the transfer member from the toner image carried by the carrier, the contact portion being made of an elastic material that satisfies expression (1) below: where A denotes a pure water contact angle (°) at 23° C. and 55% RH, and B denotes a 100% modulus (MPa) at 23° C., wherein the transfer member further comprises a release layer which has a surface roughness Rz of not more than 2 μm (Rz≦2 μm), wherein the toner image carried by the carrier includes a first toner image that is transferred to the recording medium, and a second toner image that is not transferred to the recording medium, wherein the image forming apparatus further comprises: wherein the transfer power source is configured to, when the first toner image passes through the transfer section, supply a transfer bias that is a negative voltage to the backup roller, and wherein the transfer power source is configured to, when the second toner image passes through a second transfer section, supply a non-transfer bias that is a positive voltage to the backup roller.