Abstract: A toner supplying apparatus includes a toner tank to hold toner, a supplying part projecting inside the toner tank to discharge the toner from the toner tank, and a toner agitating member rotatably disposed inside the toner tank to agitate the toner in almost an entire inner space of the toner tank including a location on a top surface of the supplying part projecting inside the toner tank.

Abstract: A developing cartridge is provided including a first frame on which a photosensitive drum is arranged, a second frame which is pivotably coupled to the first frame, and a developing roller which is coupled to the second frame. A pair of gap maintaining elements configured to facilitate maintenance of a constant developing gap are arranged on both ends of the developing roller. The developing roller and the pair of gap maintaining elements are arranged on the second frame to pivot in a direction opposite to a pivoting direction of the second frame.

Abstract: A toner cartridge including a guide member that guides supplying operation of toner. The toner cartridge includes a housing, in which a toner of a predetermined color is filled, a first coupling portion and a second coupling portion within the housing that are formed at predetermined positions of an inner wall of the housing; a developing roller, part of which is exposed outside of the housing, installed rotatably on the housing to supply the toner to a photosensitive medium and to develop an image; a supplying roller that attaches the toner to the developing roller; and the guide member that guides the toner supply and is coupled to the first and second coupling portions. Both ends of the guide member are coupled to the first and second coupling portions such that the guide member is flexed when being installed in the housing.

Abstract: A toner cartridge used with an electrophotographic image forming apparatus includes a developing roller to develop an electrostatic latent image formed on an outer circumferential surface of a photosensitive drum, a toner to supply roller supplying toner onto the developing roller, a guide member installed under the toner supplying roller to guide the toner to attach onto the surface of the toner supplying roller by a predetermined thickness, a hopper to store the toner supplied to the toner supplying roller, and an agitator rotatably installed on the hopper. A rotary shaft of the agitator is disposed in a position higher than an upper portion of the guide member.

Abstract: An electrophotographic color image forming apparatus is provided having a plurality of developing units that respectively include developer rollers to develop an electrostatic latent image formed on a photoconductor by applying toner to the electrostatic latent image. A plurality of toner cartridges respectively include agitators and are arranged in a lengthwise direction of the developer roller to supply toner to the developing units. A plurality of shafts are connected to each other through a universal joint to transmit rotational motion of a driving motor to the agitators.

Abstract: A toner cartridge has a control board mounted therein and an electrophotographic image forming apparatus using the same. The toner cartridge includes a toner tube having a mounting part on which a control board is mounted, a control board cover for covering the mounting part to mount the control board therein, and a sealing cover for sealing the toner tube.

Abstract: A toner cartridge used with an electrophotographic image forming apparatus includes a developing roller that develops an electrostatic latent image formed on an outer circumferential surface of a photosensitive drum, a toner supplying roller that supplies toner onto the developing roller, a main chamber that stores the toner, a guide member that is disposed under the toner supplying roller to receive the toner and to guide the toner toward the developing roller, a toner recovery chamber that is formed under the guide member to form a space where the toner remaining on the guide member, which is not supplied to the developing roller, can accumulate, a recovery roller that rotates in the toner recovery chamber to return the toner in the toner recovery chamber to the main chamber, and a toner blocking film that is installed on a lower portion of the guide member to prevent the toner from directly leaking to the toner recovery chamber.

Abstract: A waste toner transporting apparatus which transfers waste toner removed from a photosensitive drum to a waste toner housing is provided. The waste toner transporting apparatus includes a toner transporting plate arranged substantially above a cleaning blade. A transporting member is installed at one end of the toner transporting plate and has a cam follower arranged on an opposite side of the toner transporting plate. A driving cam contacts the cam follower and converts rotational motion into linear reciprocating motion to enable the toner transporting plate to reciprocate on the cleaning blade.

Abstract: A developing cartridge is provided including a first frame on which a photosensitive drum is arranged, a second frame which is pivotably coupled to the first frame, and a developing roller which is coupled to the second frame. A pair of gap maintaining elements configured to facilitate maintenance of a constant developing gap are arranged on both ends of the developing roller. The developing roller and the pair of gap maintaining elements are arranged on the second frame to pivot in a direction opposite to a pivoting direction of the second frame.

Abstract: A toner cartridge horizontally installed in an electrophotographic printer having a photoreceptor drum where an electrostatic latent image is formed by charging and exposure, and contributing to toner supply and development by being fixedly coupled to in the electrophotographic printer. The toner cartridge includes a housing filled with toner of a predetermined color, a development roller rotatably installed on the housing to face the photoreceptor drum and to supply the toner to the photoreceptor drum to develop an image by a difference in electrical potential, a supply roller rotatably installed in the housing in contact with the development roller and to control the toner to adhere to the development roller, and a guide member coupled to the housing to be disposed under the supply roller and to guide supply of the toner. When a diameter of the development roller is D2, the diameter D2 satisfies an inequality that 10.4?D2?22.1 [mm].

Abstract: A toner cartridge used with an electrophotographic image forming apparatus includes a developing roller to develop an electrostatic latent image formed on an outer circumferential surface of a photosensitive drum, a toner to supply roller supplying toner onto the developing roller, a guide member installed under the toner supplying roller to guide the toner to attach onto the surface of the toner supplying roller by a predetermined thickness, a hopper to store the toner supplied to the toner supplying roller, and an agitator rotatably installed on the hopper. A rotary shaft of the agitator is disposed in a position higher than an upper portion of the guide member.

Abstract: A toner cartridge including a guide member that guides supplying operation of toner. The toner cartridge includes a housing, in which a toner of a predetermined color is filled, a first coupling portion and a second coupling portion within the housing that are formed at predetermined positions of an inner wall of the housing; a developing roller, part of which is exposed outside of the housing, installed rotatably on the housing to supply the toner to a photosensitive medium and to develop an image; a supplying roller that attaches the toner to the developing roller; and the guide member that guides the toner supply and is coupled to the first and second coupling portions. Both ends of the guide member are coupled to the first and second coupling portions such that the guide member is flexed when being installed in the housing.

Abstract: A toner cartridge of an electrophotographic image forming apparatus. The toner cartridge of the electrophotographic image forming apparatus includes a developing roller that develops an electrostatic latent image formed on an outer circumferential surface of a photosensitive drum, a toner supplying roller that supplies toner onto the developing roller, a seal bracket that is installed above and apart from the toner supplying roller, an outer seal film including an end adhered to the seal bracket and the other end contacting an outer circumference of the developing roller, and an inner seal film that is adhered to an inner surface of the seal bracket so that an end of the inner seal film contacts an outer circumference of the supplying roller.

Abstract: A toner cartridge used with an electrophotographic image forming apparatus includes a developing roller that develops an electrostatic latent image formed on an outer circumferential surface of a photosensitive drum, a toner supplying roller that supplies toner onto the developing roller, a main chamber that stores the toner, a guide member that is disposed under the toner supplying roller to receive the toner and to guide the toner toward the developing roller, a toner recovery chamber that is formed under the guide member to form a space where the toner remaining on the guide member, which is not supplied to the developing roller, can accumulate, a recovery roller that rotates in the toner recovery chamber to return the toner in the toner recovery chamber to the main chamber, and a toner blocking film that is installed on a lower portion of the guide member to prevent the toner from directly leaking to the toner recovery chamber.