Abstract: A developing device includes a developer transport path through which a developer is agitated and transported, a developing roller mounted in the developer transport path, a discharging unit extending from the developer transport path in a length direction of the developing roller, the discharging unit including an air outlet from which air is discharged and a developer discharge outlet from which the developer is discharged, and a separating member mounted in the discharging unit to separate an inner portion of the discharging unit into an air discharge path, connecting the developer transport path and the air outlet, and a developer discharge path, connecting the developer transport path and the developer discharge outlet.

Abstract: A developing device includes a developer transport path through which a developer is agitated and transported, a developing roller mounted in the developer transport path, a discharging unit extending from the developer transport path in a length direction of the developing roller, the discharging unit including an air outlet from which air is discharged and a developer discharge outlet from which the developer is discharged, and a separating member mounted in the discharging unit to separate an inner portion of the discharging unit into an air discharge path, connecting the developer transport path and the air outlet, and a developer discharge path, connecting the developer transport path and the developer discharge outlet.

Abstract: A cartridge that is attached to or detached from a main body of an image forming apparatus. The cartridge includes a memory unit that includes a contact portion via which the cartridge is connected to the main body and is connected to the main body to transmit information of the cartridge to the main body. The contact portion is moved to a first position at which the contact portion is hidden inside the cartridge and a second position at which the contact portions is protruded out of the cartridge to be connected to a connection portion provided in the main body.

Abstract: A cartridge is attached to or detached from a main body of an image forming apparatus that has an opening portion and a door that opens or closes the opening portion. The cartridge includes: a memory unit with a contact portion via which the cartridge is connected to the main body to transmit information of the cartridge to the main body; and a moving member on which the contact portion is mounted, wherein the moving member is moved to a first position where the contact portion is hidden inside the cartridge and a second position where the contact portion protrudes out of the cartridge to be connected to a connection portion provided in the main body, the moving member being moved to the second position in connection with closing of the door.

Abstract: A cartridge that is attached to or detached from a main body of an image forming apparatus. The cartridge includes a memory unit that includes a contact portion via which the cartridge is connected to the main body and is connected to the main body to transmit information of the cartridge to the main body. The contact portion is moved to a first position at which the contact portion is hidden inside the cartridge and a second position at which the contact portions is protruded out of the cartridge to be connected to a connection portion provided in the main body.

Abstract: A cartridge is attached to or detached from a main body of an image forming apparatus that has an opening portion and a door that opens or closes the opening portion. The cartridge includes: a memory unit with a contact portion via which the cartridge is connected to the main body to transmit information of the cartridge to the main body; and a moving member on which the contact portion is mounted, wherein the moving member is moved to a first position where the contact portion is hidden inside the cartridge and a second position where the contact portion protrudes out of the cartridge to be connected to a connection portion provided in the main body, the moving member being moved to the second position in connection with closing of the door.

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 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.