Abstract: A developer storage container includes a container main body, an outflow port, an open/closed member and a turn stop part. The outflow port from which a developer flows out is formed in the container main body storing the developer. The open/closed member is supported to the container main body and, moves relative to the container main body based on a rotation of the container main body. The open/closed member opens and closes the outflow port. The turn stop part is formed on a wall face of the container main body, and has a circular arc shape being concentric with a rotation direction of the container main body. The turn stop part engages with a convex part which is provided in the attachment section and is formed at a different position in response to the image forming apparatus body.

Abstract: A developer storage container includes a container main body, an outflow port, an open/closed member and a turn stop part. The outflow port from which a developer flows out is formed in the container main body storing the developer. The open/closed member is supported to the container main body and, moves relative to the container main body based on a rotation of the container main body. The open/closed member opens and closes the outflow port. The turn stop part is formed on a wall face of the container main body, and has a circular arc shape being concentric with a rotation direction of the container main body. The turn stop part engages with a convex part which is provided in the attachment section and is formed at a different position in response to the image forming apparatus body.

Abstract: There is provided an image forming apparatus including: a photoconductor drum; an intermediate transfer belt that is wrapped around and stretched between the photoconductor drum and a plurality of support rolls and is driven by the photoconductor drum; and a contact member that contacts the intermediate transfer belt, wherein the image forming apparatus satisfies the following expression (1) 2T(e???1)/(e??+1)>F and T?396.9 N??(1), wherein ? represents a coefficient of friction between the photoconductor drum and the intermediate transfer belt, T represents an initial tension of the intermediate transfer belt, ? represents a wrap angle of the intermediate transfer belt on the photoconductor drum, and F represents a load in a tangential direction applied from the contact member to the photoconductor drum via the intermediate transfer belt.

Abstract: The present invention provides an image forming device, which facilitates maintenance and replacement of an intermediate transfer body and an image carrier, and prevents a deterioration in image quality which accompanies the formation of the intermediate transfer body and the image carrier as separate structures, having an image carrier on which a toner image is formed, and an intermediate transfer body conveying the toner image, which is formed on the image carrier, to a transfer medium, the image forming device including a supporting frame in which the intermediate transfer body is mounted, a suspension portion suspending the image carrier at the supporting frame to face the image carrier to the intermediate transfer body, and an attaching/removing portion at which the supporting frame is installed, and which is for attaching and removing the supporting frame to and from a device main body of the image forming device.

Abstract: There is provided an image forming apparatus including: a photoconductor; an intermediate transfer belt that is wrapped around and stretched between the photoconductor and a plurality of support rolls and is driven by the photoconductor; and a contact member that contacts the intermediate transfer belt, wherein the image forming apparatus satisfies the following expression (1) 2T(e???1)/(e??+1)>F and T?396.9 N??(1), wherein ? represents the coefficient of friction between the photoconductor and the intermediate transfer belt, T represents the initial tension of the intermediate transfer belt, ? represents the wrap angle of the intermediate transfer belt on the photoconductor, and F represents the load in a tangential direction applied from the contact member to the photoconductor via the intermediate transfer belt.

Abstract: The present invention provides an image forming device, which facilitates maintenance and replacement of an intermediate transfer body and an image carrier, and prevents a deterioration in image quality which accompanies the formation of the intermediate transfer body and the image carrier as separate structures, having an image carrier on which a toner image is formed, and an intermediate transfer body conveying the toner image, which is formed on the image carrier, to a transfer medium, the image forming device including a supporting frame in which the intermediate transfer body is mounted, a suspension portion suspending the image carrier at the supporting frame to face the image carrier to the intermediate transfer body, and an attaching/removing portion at which the supporting frame is installed, and which is for attaching and removing the supporting frame to and from a device main body of the image forming device.

Abstract: An improved image forming apparatus having an endless belt is provided. The apparatus uses an endless belt as a toner image carrier for holding a toner image thereon and transporting the toner image. In one embodiment, rib members are arranged on opposing ends of the endless belt to assist in inhibiting the endless belt from walking relative to a drive roll. A rib guide member is interposed between the rib member and the drive roll, and is rotatable independent of the drive roll. In another embodiment, the toner image is transferred from a photosensitive member to the endless transfer belt and then to a recording medium. Indicia is arranged on an outer perimeter surface of the endless transfer belt indicative of a position of the endless transfer belt, with a sensor used to detect the indicia.

Abstract: In an image forming apparatus, such as an electrophotography-basis copying machine or laser printer, ribs are provided on and along both side ends of the inner surface of an intermediate transfer belt. Rib guides are provided on both ends of a drive roll. The ribs are brought into contact with the rib guides, whereby the intermediate transfer belt is guided. The diameter of each rib guide is slightly larger than the diameter of the drive roll, to thereby form a gap between the drive roll and the intermediate transfer belt. In a region including the gap and its vicinity, a friction created between the drive roll and the intermediate transfer belt is reduced. Therefore, thrust of each rib against each rib guide, caused by the walk, is reduced.