Abstract: A fusing device and an image forming apparatus having the same are provided. The fusing device includes a position regulating device to regulate a position of a side frame which rotatably supports a fusing belt, thereby fixing a position of a fusing nip defined between the fusing belt, inside of which a heat source is placed, and a pressure roller arranged to face the fusing belt. The fusing device prevents shift of a recording medium delivery path due to deformation of the pressure roller.

Abstract: A fusing device to reduce lubricant leakage, includes a fusing belt having a heat source placed therein, a pressure roller placed to apply pressure to an outer surface of the fusing belt, and a nip plate to support an inner surface of the fusing belt so as to define a fusing nip between the fusing belt and the pressure roller. The nip plate includes a stepped portion spaced apart from the inner surface of the fusing belt so as to define a space for accommodation of a lubricant applied to the inner surface of the fusing belt. The fusing device may further include a side frame to rotatably support a longitudinal end of the fusing belt. The side frame may be provided with a lubricant guide to guide the lubricant on the longitudinal end of the fusing belt toward the center of the fusing belt.

Abstract: Disclosed herein is an image forming apparatus including a main body; a developing unit detachably mounted on the main body and having a photoconductive medium; and a cover pivotably mounted on the main body to cover and support an outer end of the developing unit. The cover may comprises a latch engaged with the main body by one end thereof so that the cover supports the developing unit. A member that supports a shaft of the photoconductive medium may also be included. Because the member operates in association with the latch, opening and closing of the cover may be facilitated, accordingly also facilitating separation of the developing unit from the main body.

Abstract: A fusing device and an image forming apparatus having the same are provided. The fusing device includes a position regulating device to regulate a position of a side frame which rotatably supports a fusing belt, thereby fixing a position of a fusing nip defined between the fusing belt, inside of which a heat source is placed, and a pressure roller arranged to face the fusing belt. The fusing device prevents shift of a recording medium delivery path due to deformation of the pressure roller.

Abstract: A fusing device to reduce lubricant leakage, includes a fusing belt having a heat source placed therein, a pressure roller placed to apply pressure to an outer surface of the fusing belt, and a nip plate to support an inner surface of the fusing belt so as to define a fusing nip between the fusing belt and the pressure roller. The nip plate includes a stepped portion spaced apart from the inner surface of the fusing belt so as to define a space for accommodation of a lubricant applied to the inner surface of the fusing belt. The fusing device may further include a side frame to rotatably support a longitudinal end of the fusing belt. The side frame may be provided with a lubricant guide to guide the lubricant on the longitudinal end of the fusing belt toward the center of the fusing belt.

Abstract: Disclosed herein is an image forming apparatus including a main body; a developing unit detachably mounted on the main body and having a photoconductive medium; and a cover pivotably mounted on the main body to cover and support an outer end of the developing unit. The cover may comprises a latch engaged with the main body by one end thereof so that the cover supports the developing unit. A member that supports a shaft of the photoconductive medium may also be included. Because the member operates in association with the latch, opening and closing of the cover may be facilitated, accordingly also facilitating separation of the developing unit from the main body.

Abstract: An electrophotographic includes a main frame, a photosensitive drum unit vertically detachably installed on the main frame and having a photosensitive drum on which an electrostatic latent image is formed, and an intermediate transfer unit vertically detachably installed on the main frame and having a transfer belt to which a toner image is transferred from the photosensitive drum, wherein the intermediate transfer unit is installed above the photosensitive drum unit.

Abstract: In an electrophotographic printer including a photosensitive drum unit having a photosensitive drum, a plurality of development units each having a developing roller, an intermediate transfer unit having a transfer belt to which an image is transferred from the photosensitive drum, a waste toner storage container to store waste toner generated at the photosensitive drum unit and the intermediate transfer unit, and a sheet transport unit which finally holds the image. The electrophotographic printer also includes first through third doors provided to mount or dismount the plurality of development units, the photosensitive drum unit and intermediate transfer unit, and the waste toner storage container, respectively, and a fourth door provided to access the sheet transport unit.

Abstract: A waste toner transfer apparatus in an electrophotographic printer transfers waste toner removed by a cleaning unit from an image holding body where a toner image is temporarily held to a waste toner storage container. The waste toner transfer apparatus includes a duct connecting the cleaning unit and the storage container, a transfer unit installed in the duct and transferring the waste toner to the storage container, and an agitation member installed in the duct to move therein and guide the waste toner from the cleaning unit to the transfer unit.

Abstract: A waste toner transfer apparatus in an electrophotographic printer to transfer waste toner removed by a cleaning unit and transferred to a waste toner storage container. The waste toner transfer apparatus includes a duct connecting the cleaning unit and the waste toner storage container, a conveying coil having a spiral shape which is installed in the duct and rotates, and an insertion member inserted in the conveying coil.

Abstract: An electrophotographic printer including a pre-erasing unit. The pre-erasing unit includes a pre-erasing lamp to irradiate light, and a pre-transfer erasing lens to induce the light generated from the pre-transfer erasing lamp to the photosensitive drum, movably installed such that it moves to an erasure position at which the pre-transfer erasing lens is close to the photosensitive drum for erasure, and moves to a retracted position spaced apart from the photosensitive drum so as not to interfere therewith when the photosensitive drum unit is being mounted or dismounted. The pre-erasing unit may further include an elastic member to provide elasticity in a direction in which the pre-transfer erasing lens moves to the retracted position.

Abstract: An electrophotographic includes a main frame, a photosensitive drum unit having a photosensitive drum and vertically detachably installed on the main frame, a plurality of development units each having a developing roller and detachably installed on the main frame while sliding in a horizontal direction, and a first door openably installed for mounting or dismounting the plurality of development units.

Abstract: A waste toner transfer apparatus in an electrophotographic printer for transferring waste toner removed by a cleaning unit from an image holding body, where a toner image is temporarily held, to a waste toner storage container. The waste toner apparatus includes a duct for connecting the cleaning unit and the waste toner storage container, a transfer unit installed in the duct to transfer the waste toner, a guide portion provided at an outlet of the duct to be inclined downward to guide the waste toner toward the waste toner storage container, and an agitation member installed on the guide portion and moving to prevent the waste toner from accumulating on the guide portion.

Abstract: An apparatus to transfer a color laser image including an intermediate transfer belt around a plurality of guide rollers provided in a printer body frame; a transfer roller to contact the intermediate transfer belt with a transfer nip, and to transfer the color image of the intermediate transfer belt to a printing paper; a transfer panel, positioned to open and close with respect to the printer body frame, to support the transfer roller; a separating unit to separate the transfer roller from the intermediate transfer belt at constant intervals or pressurize the transfer roller to contact the intermediate transfer belt; and an aligning unit to align the transfer roller with respect to the intermediate transfer belt in the printer body frame. The positions of the central axis of the intermediate transfer belt and the axis of the transfer roller are controlled at the same level on the printer body frame.

Abstract: In an electrophotographic printer including a photosensitive drum unit having a photosensitive drum, a plurality of development units each having a developing roller, an intermediate transfer unit having a transfer belt to which an image is transferred from the photosensitive drum, a waste toner storage container to store waste toner generated at the photosensitive drum unit and the intermediate transfer unit, and a sheet transport unit which finally holds the image. The electrophotographic printer also includes first through third doors provided to mount or dismount the plurality of development units, the photosensitive drum unit and intermediate transfer unit, and the waste toner storage container, respectively, and a fourth door provided to access the sheet transport unit.

Abstract: A waste toner transfer apparatus in an electrophotographic printer to transfer waste toner removed by a cleaning unit and transferred to a waste toner storage container. The waste toner transfer apparatus includes a duct connecting the cleaning unit and the waste toner storage container, a conveying coil having a spiral shape which is installed in the duct and rotates, and an insertion member inserted in the conveying coil.

Abstract: An electrophotographic includes a main frame, a photosensitive drum unit vertically detachably installed on the main frame and having a photosensitive drum on which an electrostatic latent image is formed, and an intermediate transfer unit vertically detachably installed on the main frame and having a transfer belt to which a toner image is transferred from the photosensitive drum, wherein the intermediate transfer unit is installed above the photosensitive drum unit.

Abstract: A waste toner transfer apparatus in an electrophotographic printer transfers waste toner removed by a cleaning unit from an image holding body where a toner image is temporarily held to a waste toner storage container. The waste toner transfer apparatus includes a duct connecting the cleaning unit and the storage container, a transfer unit installed in the duct and transferring the waste toner to the storage container, and an agitation member installed in the duct to move therein and guide the waste toner from the cleaning unit to the transfer unit.

Abstract: An electrophotographic printer including a pre-erasing unit. The pre-erasing unit includes a pre-erasing lamp to irradiate light, and a pre-transfer erasing lens to induce the light generated from the pre-transfer erasing lamp to the photosensitive drum, movably installed such that it moves to an erasure position at which the pre-transfer erasing lens is close to the photosensitive drum for erasure, and moves to a retracted position spaced apart from the photosensitive drum so as not to interfere therewith when the photosensitive drum unit is being mounted or dismounted. The pre-erasing unit may further include an elastic member to provide elasticity in a direction in which the pre-transfer erasing lens moves to the retracted position.

Abstract: A waste toner transfer apparatus in an electrophotographic printer for transferring waste toner removed by a cleaning unit from an image holding body, where a toner image is temporarily held, to a waste toner storage container. The waste toner apparatus includes a duct for connecting the cleaning unit and the waste toner storage container, a transfer unit installed in the duct to transfer the waste toner, a guide portion provided at an outlet of the duct to be inclined downward to guide the waste toner toward the waste toner storage container, and an agitation member installed on the guide portion and moving to prevent the waste toner from accumulating on the guide portion.