US 10,423,115 B2 · Image forming apparatus

Abstract

An image forming apparatus including an image carrying member, an intermediate transfer belt having conductivity, a toner image on the image carrying member being primarily transferred to the intermediate transfer belt, a secondary transfer member in contact with an outer peripheral surface of the intermediate transfer belt, the secondary transfer member secondarily transferring the toner image on the intermediate transfer belt to a transfer material, a power supply applying a voltage to the secondary transfer member, the toner image being primarily transferred from the image carrying member to the intermediate transfer belt by having a voltage be applied to the secondary transfer member from the power supply, a contact member in contact with the intermediate transfer belt, and a constant current diode, an anode side thereof being connected to the power supply, and a cathode side thereof being connected to the contact member.

Claims19

Dependent claims

An image forming apparatus comprising:

an image carrying member configured to carry a toner image;
an endless and movable intermediate transfer belt having conductivity, the toner image on the image carrying member being primarily transferred to the intermediate transfer belt;
a secondary transfer member in contact with an outer peripheral surface of the intermediate transfer belt, and configured to secondarily transfer the toner image from the intermediate transfer belt to a transfer material;
a power supply configured to apply a voltage to the secondary transfer member, the toner image being primarily transferred from the image carrying member to the intermediate transfer belt by having a voltage be applied to the secondary transfer member from the power supply;
a contact member configured to contact with the intermediate transfer belt;
and
a constant current diode, an anode side of the constant current diode being connected to the power supply, and a cathode side of the constant current diode being connected to the contact member.

4 more elements

An image forming apparatus comprising:

an image carrying member configured to carries a toner image;
an endless and movable intermediate transfer belt having conductivity, the toner image on the image carrying member being primarily transferred to the intermediate transfer belt;
a secondary transfer member in contact with an outer peripheral surface of the intermediate transfer belt, the secondary transfer member secondarily transferring the toner image on the intermediate transfer belt to a transfer material;
a power supply configured to applies a voltage to the secondary transfer member, the toner image being primarily transferred from the image carrying member to the intermediate transfer belt by having a voltage be applied to the secondary transfer member from the power supply;
a contact member in contact with the intermediate transfer belt;
and
a constant current circuit provided in a current path that does not connect with the secondary transfer member and that electrically connects the power supply and the contact member to each other.

4 more elements

Dependencies are inferred from the claim text.

Image forming apparatus

Life of this patent

Image forming apparatus

Life of this patent

Abstract

Claims19