Image forming apparatus with intermediate transfer member
AssigneeCanon Kabushiki Kaisha
InventorsKoichi Tanigawa, Kimio Nakahata, Akihiko Takeuchi, Hideo Nanataki, Kazuaki Ono
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Abstract
An image forming apparatus includes a first image bearing member on which a toner image can be formed; an intermediate transfer member onto which the toner image is transferable from the first image bearing member; wherein the toner image is further transferred onto a second image bearing member therefrom; wherein the intermediate transfer member comprises a conductive layer to which a voltage is applied, a surface layer on the conductive layer, and a volume resistivity of the surface layer is 10.sup.5 -10.sup.11 ohm.cm.
Claims43
An image forming apparatus, comprising:
- a first image bearing member on which a toner image can be formed;
- an intermediate transfer member onto which the toner image is transferable from said first image bearing member;
- wherein the toner image is further transferred onto a second image bearing member therefrom;
- wherein said intermediate transfer member comprises a conductive layer to which a voltage is applied, a surface layer on the conductive layer, and a volume resistivity of the surface layer is 10.sup.5 -10.sup.11 ohm.cm, wherein a voltage is set so that a current in a non-image portion during an image transfer operation from said first image bearing member to said intermediate transfer member is less than twice a current in an image portion.
An image forming apparatus comprising:
- a first image bearing member on which a toner image can be formed;
- an intermediate transfer member onto which the toner image is transferable from said first image bearing member;
- wherein said apparatus is selectively operable in a first mode in which the toner image is transferred from said first image bearing member to said intermediate transfer member, and thereafter, the toner image is transferred from said intermediate transfer member to the second image bearing member, and in a second mode in which a second image bearing member is passed between said first image bearing member and said intermediate transfer member to transfer the toner image from said first image bearing member onto the second image bearing member.
An image forming apparatus, comprising:
- a first image bearing member on which a toner image can be formed;
- an intermediate transfer member on which the toner image is transferable from said first image bearing member;
- transfer means for transferring the toner image from said intermediate transfer member onto the second image bearing member;
- constant current control means for supplying a constant current onto said intermediate transfer member;
- determining means for determining a voltage to be applied to said transfer means in accordance with a voltage provided in a constant current control operation.
An image forming apparatus, comprising:
- a first image bearing member on which a toner image can be formed;
- an intermediate transfer member on which the toner image is transferable from said first image bearing member at a first transfer position;
- wherein the toner image is transferred from said intermediate transfer member onto a second image bearing member at a second transfer position;
- wherein a first speed of said first image bearing member in the first transfer position is different from a second speed of said intermediate transfer member, and a third speed of said intermediate transfer member at the second transfer position is different from a fourth speed of the second image bearing member.
Dependencies are inferred from the claim text.