Abstract: The present invention provides a toner cartridge of replaceable type that is removably loaded into an apparatus main body, the toner cartridge including: a first section that is substantially cylindrical shape and at which a toner conveying member is disposed; and a second section that is provided at a substantially central portion in a longitudinal direction of the toner cartridge, the substantially central portion being a portion other than an upstream side in a toner conveyance direction of the first section and a downstream side in the toner conveyance direction of the first section at which a toner supply opening.

Abstract: The present invention provides an exchangeable toner cartridge which can be attached to or detached from an apparatus main body. The toner cartridge includes the toner transfer member which is provided along a longitudinal direction of the toner cartridge and which can rotate. At the first range of the upstream side in a toner transfer direction the toner transfer member is formed into a substantially spiral shape, and at the second range of the downstream side in the toner transfer direction on a side of a toner supply port, toner transfer member has a shape different from that of the first range.

Abstract: The present invention provides an exchangeable toner cartridge which can be attached to or detached from an apparatus main body. The toner cartridge includes the toner transfer member which is provided along a longitudinal direction of the toner cartridge and which can rotate. At the first range of the upstream side in a toner transfer direction the toner transfer member is formed into a substantially spiral shape, and at the second range of the downstream side in the toner transfer direction on a side of a toner supply port, toner transfer member has a shape different from that of the first range.

Abstract: A developing device includes: a developer supporter that includes: a magnet member that has a plurality of magnetic poles; and a cylinder member; and a thickness regulation member wherein, of the plurality of the magnetic poles, a magnetic pole, which is placed at a position nearest to the thickness regulation member downstream in a rotation direction of the cylinder member from the thickness regulation member, has a maximum position of a normal magnetic flux density distribution, and the maximum position is placed outside the area of angle ? downstream in the rotation direction of the cylinder member from the thickness regulation member, and wherein the diameter of the cylinder member is D, the projection width is W in a case where the thickness regulation member is projected onto the surface of the cylinder member, and the angle ? is 180×W/(D×?).

Abstract: The present invention provides a toner cartridge of replaceable type that is removably loaded into an apparatus main body, the toner cartridge including: a first section that is substantially cylindrical shape and at which a toner conveying member is disposed; and a second section that is provided at a substantially central portion in a longitudinal direction of the toner cartridge, the substantially central portion being a portion other than an upstream side in a toner conveyance direction of the first section and a downstream side in the toner conveyance direction of the first section at which a toner supply opening.

Abstract: The present invention provides an exchangeable toner cartridge which can be attached to or detached from an apparatus main body. The toner cartridge includes the toner transfer member which is provided along a longitudinal direction of the toner cartridge and which can rotate. At the first range of the upstream side in a toner transfer direction the toner transfer member is formed into a substantially spiral shape, and at the second range of the downstream side in the toner transfer direction on a side of a toner supply port, toner transfer member has a shape different from that of the first range.

Abstract: Provided is an image forming apparatus that not only prevents leakage of a developer from a developing apparatus due to vibrations and the like at the time of transportation but also enables attachment of a developer leakage preventing member to a miniaturized image forming apparatus and facilitates attachment and detachment of the developer leakage preventing member at the time of use of the image forming apparatus. The image forming apparatus that is shipped with a developing member being fitted to an apparatus main body includes a developer leakage preventing member that prevents leakage of a developer from the developing member, in which the developer leakage preventing member is fitted at an attachment position opposing the developing member in place of a component that is detachably attachable to the apparatus main body at the attachment position.

Abstract: Provided is an image forming apparatus that not only prevents leakage of a developer from a developing apparatus due to vibrations and the like at the time of transportation but also enables attachment of a developer leakage preventing member to a miniaturized image forming apparatus and facilitates attachment and detachment of the developer leakage preventing member at the time of use of the image forming apparatus. The image forming apparatus that is shipped with a developing member being fitted to an apparatus main body includes a developer leakage preventing member that prevents leakage of a developer from the developing member, in which the developer leakage preventing member is fitted at an attachment position opposing the developing member in place of a component that is detachably attachable to the apparatus main body at the attachment position.

Abstract: A developing device is provided with developing unit covers mounted on opening portions of developing units through which developing rollers are exposed to close the opening portions. Due to such a construction, even when the developing units receive the vibration or the impact of falling during the course of transportation of an image forming apparatus on which the developing device is mounted, the overflow of a developer through the opening portion can be prevented.

Abstract: A rotary developing device which facilitates a positional adjustment of developing units and prevents the developing units from being shifted even when they are used for a long period. Pins protruding from a revolver are inserted into elongated holes formed in developing units so that developing units are held in such a manner that the developing units are movable relative to the revolver. By mounting a spacer between the elongated hole and the pin, the positional adjustment of the photosensitive drum and the tracking roller is completed. Furthermore, a plurality of spacers which differ in thickness are prepared and by merely selectively mounting an appropriate spacer, the position adjustment of the tracking roller is completed.