Samsung Electronics Co., Ltd.

Dong-hoon Park

Sam-seok Choi

Myoung-su Baek

Seung-Yoon Lee

Jun-Ho Lee

Jun-ho Lee

Chung-guk Baek

A developing unit includes a developer feeding unit which feeds developer to an image receptor, a casing which supports the developer feeding unit and includes a developer storing part provided in an area to face the developer feeding unit and to store the developer, and a developer feeding plate which is formed with a developer flowing hole through which the developer flows, and is provided to move between the developer storing part and the developer feeding unit.

Developing unit having developer feeding plate and image forming apparatus having the same

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 D, the diameter Dsatisfies an inequality that 10.4&#x2266;D&#x2266;22.1 mm.

Toner cartridge and electrophotographic printer employing the same

A developer container for a developer supply device and an image forming apparatus include: a container main body which contains developer therein and is provided with at least one developer outlet formed at one side thereof. A shutter unit is rotatably installed in the container main body to open the developer outlet intermittently when being rotated. A developer supply device and an image forming apparatus are provided with the developer container.

Developer container and developer supply device and image forming apparatus including the developing container

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.

Waste toner transporting apparatus and toner cartridge having the same

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.

Toner cartridge used with an electrophotographic image forming apparatus

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.

Developing cartridge and electrophotographic image forming apparatus employing the same

A waste toner collecting apparatus separates waste toner remaining on an outer circumferential surface of a photosensitive medium when a visible image is transferred thereon and stores the separated waste toner. An electrophotographic image forming device includes the waste toner collecting apparatus. The waste toner collecting apparatus includes a cleaning blade that separates the waste toner from a photosensitive medium by scratching the outer circumferential surface of the photosensitive medium. A waste toner container stores the waste toner. The waste toner separated from the photosensitive medium is transported to the waste toner container through a waste toner passage. An agitating plate reciprocates inside the waste toner passage to prevent accumulation of the waste toner.

Waste toner collecting apparatus and electrophotographic image forming device including the same

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.

Toner cartridge used with electrophotographic image forming apparatus

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.

A process cartridge, which uses a removable cartridge and also a one-property contact system, used with an image forming apparatus, includes a drum cartridge in which a photoconductive drum is disposed in an exposed manner, a toner cartridge in which a developing roller rotating in contact with the photoconductive drum is mounted in an exposed manner, and supporting members supporting and guiding the toner cartridge so that the developing roller moves linearly with respect to the photoconductive drum. The supporting members are made stationary in predetermined positions of the main body, and a developing nip between the photoconductive drum and the developing roller is controlled as the toner cartridge is moved linearly with respect to the supporting member within a predetermined distance range.

Movable process cartridge usable in a one-property contact developing process and an image forming apparatus employing the same

A toner cartridge assembly corresponding to a photosensitive drum cartridge disposed at a printing apparatus body. The toner cartridge assembly develops toner on the photosensitive drum and collects used toner and includes a toner cartridge corresponding to the photosensitive drum cartridge at the body, the toner cartridge having a developing roller to develop the stored toner on the photosensitive drum; and a used toner chamber movably connected with one side of the toner cartridge to store used toner collected from the photosensitive drum cartridge. The used toner chamber is fixed at a predetermined position on the printing apparatus body, and the toner cartridge adjusts a developing nip between the photosensitive drum and the developing roller by being connected with the used toner chamber in a way that the toner cartridge can reciprocate and rotate in a direction of the photosensitive drum.

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Osan-si, South Korea

Dong-hoon Park