Patent ID: 9008566
Filing Date: 2015-04-14
Classification: G03G

Abstract:
1. An image forming device, comprising: an image carrier having a surface on which a toner image is formed; an intermediate transfer body to which the toner image formed on the image carrier is firstly transferred; a secondary transfer member arranged to make contact with the intermediate transfer body and configured to secondarily transfer the toner image transferred to the intermediate transfer body, to a recording medium; separating members arranged at a downstream side of a nip portion between the intermediate transfer body and the secondary transfer member in a recording medium conveying direction and configured to separate the recording medium from the intermediate transfer body; a power supply circuit configured to apply bias voltages to the separating members; and sensors arranged at an upstream side of the nip portion in the recording medium conveying direction and configured to detect a toner amount transferred to the intermediate transfer body, wherein the separating members are configured to separate the recording medium from the intermediate transfer body when the bias voltages are applied to the separating members, the separating members including two or more separating members installed along a direction perpendicular to the recording medium conveying direction, the sensors include two or more sensors installed along the direction perpendicular to the recording medium conveying direction, the bias voltages are applied to the separating members independently of each other depending on a toner amount distribution of the toner image transferred to the recording medium, in the direction perpendicular to the recording medium conveying direction, and the bias voltages applied to the separating members are controlled depending on outputs of the sensors so as to restrain a deflection of the recording medium toward the intermediate transfer body and the secondary transfer member due to the toner amount distribution in the direction perpendicular to the recording medium conveying direction.