Abstract: An image forming apparatus including a body provided at one side thereof with an opening, a transfer device movably installed at the body so as to be detachable through the opening, and a locking lever rotatably installed at the transfer device, wherein the locking lever rotates between a first position at which one end of the locking lever protrudes from the transfer device and a second position at which the one end is accommodated within the transfer device, and the body includes a locking protrusion that is locked with other end of the locking lever in a state that the locking lever is at the first position, so that only in a state that a worker rotates the locking lever while gripping the transfer device, the transfer device is separated from the body, thereby separating the transfer device in a safe manner.

Abstract: Disclosed are a transfer unit and an image forming apparatus. The image forming apparatus includes a main body frame on which one or more image carrying bodies are is supported and a transfer unit coupled to the main body frame.

Abstract: Disclosed herein are an image forming apparatus and a control method thereof. The image forming apparatus includes a plurality of photoconductors, a transfer belt, a plurality of transfer rollers arranged in parallel with the plurality of photoconductors, and a controller rotating the transfer belt under the condition that at least one of the plurality of transfer rollers presses the transfer belt toward at least one of the plurality of photoconductors, interrupting power transmitted to the transfer belt to cause at least another of the plurality of transfer rollers to press the transfer belt toward at least another of the plurality of photoconductors, standing by until rotation of the transfer belt is stopped, after interruption of the power, and controlling the at least another of the plurality of transfer rollers so as to press the transfer belt toward the at least another of the plurality of photoconductors.

Abstract: An image forming apparatus, including: a main body; an image carrying body disposed in the main body, a transfer unit and an electrical charge removal unit. The image forming apparatus forms a visible image on the image carrying body by carrying out charging, exposing and developing processes. The transfer unit transfers the visible image from the image carrying body to a printing medium. The electrical charge removal unit is configured to remove the residual electrical charge from the printing medium, and is movable, in cooperation with at least one replaceable component part of the transfer unit, between an operable position at which the electrical charge removal unit is capable of removing the electrical charge from the printing medium and a non-interfering position at which the electrical charge removal unit does not interfere with the movement of the at least one replaceable component part of the transfer unit being received into or being removed from the main body for replacement.

Abstract: An image forming apparatus includes a photosensitive body on which a visible image is developed by developer, an intermediate transfer belt to which developer of the photosensitive body is transferred, and a first transfer roller to transfer the developer from the photosensitive body to the intermediate transfer belt, wherein since a developing unit housing at which the photosensitive body is mounted is provided with position regulating guides to support a shaft of the first transfer roller, the intermediate transfer belt comes into contact with the photosensitive body at a uniform angle. As a result, uniform print quality may be obtained.

Abstract: Disclosed is an image forming apparatus, including: a main body; an image carrying body disposed in the main body, a transfer unit and an electrical charge removal unit. The image forming apparatus forms a visible image on the image carrying body by carrying out charging, exposing and developing processes. The transfer unit transfers the visible image from the image carrying body to a printing medium. The electrical charge removal unit is configured to remove the residual electrical charge from the printing medium, and is movable, in cooperation with at least one replaceable component part of the transfer unit, between an operable position at which the electrical charge removal unit is capable of removing the electrical charge from the printing medium and a non-interfering position at which the electrical charge removal unit does not interfere with the movement of the at least one replaceable component part of the transfer unit being received into or being removed from the main body for replacement.

Abstract: An image forming apparatus, including: a main body; an image carrying body disposed in the main body, a transfer unit and an electrical charge removal unit. The image forming apparatus forms a visible image on the image carrying body by carrying out charging, exposing and developing processes. The transfer unit transfers the visible image from the image carrying body to a printing medium. The electrical charge removal unit is configured to remove residual electrical charge from the printing medium, and is movable, in cooperation with at least one replaceable component part of the transfer unit, between an operable position at which the electrical charge removal unit is capable of removing the electrical charge from the printing medium and a non-interfering position at which the electrical charge removal unit does not interfere with the movement of the at least one replaceable component part of the transfer unit being received into or being removed from the main body for replacement.

Abstract: Disclosed are a transfer unit and an image forming apparatus. The image forming apparatus includes a main body frame on which one or more image carrying bodies are is supported and a transfer unit coupled to the main body frame.

Abstract: An image forming apparatus and a transfer device thereof the transfer device including an intermediate transfer belt, at least one intermediate transfer belt roller to maintain tension in the intermediate transfer belt, transfer rollers to press the intermediate transfer belt to image carriers and a state changing device. The state changing device includes: a rotating shaft; a first cam member coupled to the rotating shaft and configured to move the intermediate transfer belt roller to reduce the tension applied to the intermediate transfer belt; and a second cam member coupled to the rotating shaft and configured to move at least one of the transfer rollers away from the intermediate transfer belt.

Abstract: An image forming apparatus includes a photosensitive body on which a visible image is developed by developer, an intermediate transfer belt to which developer of the photosensitive body is transferred, and a first transfer roller to transfer the developer from the photosensitive body to the intermediate transfer belt, wherein since a developing unit housing at which the photosensitive body is mounted is provided with position regulating guides to support a shaft of the first transfer roller, the intermediate transfer belt comes into contact with the photosensitive body at a uniform angle. As a result, uniform print quality may be obtained.

Abstract: An image forming apparatus includes a first conveyance path to guide a print medium from a pickup unit to a pair of conveyance rollers and a second conveyance path to guide the print medium from the conveyance rollers to a transfer device. The first conveyance path and the second conveyance path are curved in opposite directions so as to reduce vertical heights of the first and second conveyance paths and consequently, reduce a height of a main body of the image forming apparatus.

Abstract: Disclosed is an image forming apparatus, including: a main body; an image carrying body disposed in the main body, a transfer unit and an electrical charge removal unit. The image forming apparatus forms a visible image on the image carrying body by carrying out charging, exposing and developing processes. The transfer unit transfers the visible image from the image carrying body to a printing medium. The electrical charge removal unit is configured to remove the residual electrical charge from the printing medium, and is movable, in cooperation with at least one replaceable component part of the transfer unit, between an operable position at which the electrical charge removal unit is capable of removing the electrical charge from the printing medium and a non-interfering position at which the electrical charge removal unit does not interfere with the movement of the at least one replaceable component part of the transfer unit being received into or being removed from the main body for replacement.

Abstract: Disclosed are a transfer unit and an image forming apparatus. The image forming apparatus includes a main body frame on which one or more image carrying bodies are is supported and a transfer unit coupled to the main body frame.

Abstract: A transfer unit and an image forming apparatus having the same. The transfer unit includes a transfer unit body to accommodate a printing medium conveyor, which makes a printing medium receive an image while moving the printing medium, a body handle used to mount the transfer unit body in an image forming apparatus and to separate the transfer unit body from the image forming apparatus, and a locking and releasing unit to lock the transfer unit body to the image forming apparatus and to release a locking connection therebetween. The locking and releasing unit is disposed to carry out a releasing operation by grasping the body handle.

Abstract: An image forming apparatus includes a belt to transfer a printing medium, a plurality of support rollers which rotatably supports the belt, a photosensitive medium which has a surface on which a visible toner image is formed by charged toner, a transfer roller which is disposed adjacent to the photosensitive medium with the belt interposed therebetween, a power supplying part which supplies power to the transfer roller so that a surface of the transfer roller has an electrical potential, and a control part which controls the power supplying part to supply a pulse power, which has a middle power of a same polarity as a polarity of the charged toner, to the transfer roller so that the charged toner remaining on the belt after the belt transfers the printing medium past the photosensitive medium is transferred back to the photosensitive medium.

Abstract: An image forming apparatus includes a transfer unit to transfer a toner to a printing medium, and a waste toner recovery unit to convey a waste toner recovered from the transfer unit. A first driving source for driving the transfer unit is configured independently of a second driving source for driving the waste toner recovery unit, so that deterioration in the quality of image caused by the waste toner recovery unit can be minimized.

Abstract: An image forming apparatus capable of reducing a space required to install a transfer unit to achieve a compact body size. The image forming apparatus can include a body, a frame installed in the body, a transfer unit installed inside the frame, and a waste toner recovery device to recover waste toner collected from the transfer unit. The waste toner recovery device can include a first delivery unit to deliver the waste toner in a first direction, and a second delivery unit to deliver the waste toner, delivered from the first delivery unit, in a second direction. The second delivery unit can be movably installed to the frame and can be coupled to or detached from the first delivery unit via movement thereof.

Abstract: An image forming apparatus and a transfer device thereof are disclosed. The transfer device includes an intermediate transfer belt, at least one intermediate transfer belt roller to maintain tension in the intermediate transfer belt, transfer rollers to press the intermediate transfer belt to image carriers and a state changing device to change an operating state between at least a first state, in which the tension in the intermediate transfer belt is released, and a second state, in which select ones of the transfer rollers are separated from the intermediate transfer belt.

Abstract: An image forming apparatus includes a belt to transfer a printing medium, a plurality of support rollers which rotatably supports the belt, a photosensitive medium which has a surface on which a visible toner image is formed by charged toner, a transfer roller which is disposed adjacent to the photosensitive medium with the belt interposed therebetween, a power supplying part which supplies power to the transfer roller so that a surface of the transfer roller has an electrical potential, and a control part which controls the power supplying part to supply a pulse power, which has a middle power of a same polarity as a polarity of the charged toner, to the transfer roller so that the charged toner remaining on the belt after the belt transfers the printing medium past the photosensitive medium is transferred back to the photosensitive medium.

Abstract: A transfer unit and an image forming apparatus having the same. The transfer unit includes a transfer unit body to accommodate a printing medium conveyor, which makes a printing medium receive an image while moving the printing medium, a body handle used to mount the transfer unit body in an image forming apparatus and to separate the transfer unit body from the image forming apparatus, and a locking and releasing unit to lock the transfer unit body to the image forming apparatus and to release a locking connection therebetween. The locking and releasing unit is disposed to carry out a releasing operation by grasping the body handle.