# US 2008/0187378 A1 · Image forming apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0187378 A1 - Document ID: US20080187378A1 - Status: Published application - Kind: A1 - Application number: 11/869,833 - Filed: 2007-10-10 - Published: 2008-08-07 - Earliest claimed: 2007-02-06 - Assignees: Samsung Electronics Co., Ltd. - Inventors: Young Taek Lim - Web page: https://patentgrep.com/patent/US20080187378A1 ## CPC - G03G 21/12: Toner waste containers - G03G 2221/1624: transporting cleaned toner into separate vessels, e.g. photoreceptors, external containers - G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY ## Abstract An image forming apparatus including a compact waste toner storage device in which waste toner can be evenly stored. The image forming apparatus includes a waste toner tank to store the waste toner that is collected from a cleaning member to remove the residual waste toner on an image carrying body, and a vibration unit provided inside the waste toner tank to prevent the waste toner from accumulating unevenly. Because the vibration unit is provided inside the waste toner tank, the apparatus can be manufactured compactly. Also, because a coil spring and a stopper are used in the vibration unit, the vibration unit does not take up much space in the waste toner tank. Further, much more waste toner can be stored in the waste toner tank, despite having a same size as a conventional waste toner tank. ## Claims ### Claim 1 An image forming apparatus, comprising: a waste toner storage device comprising: a waste toner tank to store waste toner collected from a cleaning member to remove the residual waste toner on an image carrying body; and a vibration unit provided inside the waste toner tank to prevent the waste toner from accumulating unevenly. ### Claim 2 (depends on 1) The image forming apparatus according to claim 1, wherein the vibration unit comprises: an elastic member provided inside the waste toner tank; and a drive member to move the elastic member. ### Claim 3 (depends on 2) The image forming apparatus according to claim 2, wherein the vibration unit further comprises a stopper protrudingly formed on an inner surface of the waste toner tank on a moving path of the elastic member to apply elastic force to the elastic member. ### Claim 4 (depends on 2) The image forming apparatus according to claim 2, wherein the elastic member is a coil spring rotatably provided inside the waste toner tank. ### Claim 5 (depends on 4) The image forming apparatus according to claim 4, wherein the stopper is provided near a middle portion of the coil spring. ### Claim 6 (depends on 4) The image forming apparatus according to claim 4, wherein the stopper is provided near an end portion of the coil spring. ### Claim 7 (depends on 4) The image forming apparatus according to claim 4, wherein: the coil spring and the stopper are provided in plurality; and the stoppers are provided near end portions of the respective coil springs at opposite ends of the respective coil springs. ### Claim 8 (depends on 2) The image forming apparatus according to claim 2, wherein: the elastic member is disposed apart from an inner surface of the waste toner tank in a non-operation state; and if elastic force is applied to the elastic member by the stopper, the elastic member touches the inner surface of the waste toner tank. ### Claim 9 An image forming apparatus, comprising: a main body; a developing unit provided inside the main body to form a toner image on an image carrying body; a cleaning member to remove residual waste toner on the image carrying body; and a waste toner storage device to collect the waste toner provided from the cleaning member, comprising: a waste toner tank to store the waste toner collected from the cleaning member, and a vibration unit to prevent the waste toner from accumulating unevenly. ### Claim 10 (depends on 9) The image forming apparatus according to claim 9, wherein: the developing unit is disposed in a horizontal direction in the main body; and the waste toner storage device to collect the waste toner is provided below the cleaning member. ### Claim 11 (depends on 9) The image forming apparatus according to claim 9, wherein the vibration unit comprises: an elastic member provided inside the waste toner tank; and a drive member to move the elastic member. ### Claim 12 (depends on 11) The image forming apparatus according to claim 11, wherein the vibration unit includes a stopper protrudingly formed on an inner surface of the waste toner tank on a moving path of the elastic member to apply elastic force to the elastic member. ### Claim 13 (depends on 12) The image forming apparatus according to claim 12, wherein the elastic member is a coil spring rotatably provided inside the waste toner tank. ### Claim 14 (depends on 13) The image forming apparatus according to claim 13, wherein the stopper is provided near a middle portion of the coil spring. ### Claim 15 (depends on 14) The image forming apparatus according to claim 14, wherein: the coil spring and the stopper are provided in plurality; and the stoppers are provided near end portions of the respective coil springs at opposite ends. ### Claim 16 (depends on 12) The image forming apparatus according to claim 12, wherein: the elastic member is disposed apart from an inner surface of the waste toner tank in a non-operation state; and if elastic force is applied to the elastic member by the stopper, the elastic member touches the inner surface of the waste toner tank. ### Claim 17 An image forming apparatus, comprising: a plurality of developing units to form a toner image on a paper; a waste toner tank having a plurality of waste toner inlet holes to receive toner from the plurality of developing units to store the received waste toner from the developing units; and a vibration unit provided inside the waste toner tank to disperse the waste toner inside the waste toner tank. ### Claim 18 (depends on 17) The image forming apparatus of claim 17, wherein: the plurality of developing units are disposed in a direction; and the waste toner inlet holes are arranged in the direction. ### Claim 19 (depends on 17) The image forming apparatus of claim 17, wherein the waste toner inlet holes are spaced-apart from each other to receive the toner from corresponding ones of the developing units. ### Claim 20 (depends on 17) The image forming apparatus of claim 17, wherein the vibration unit is disposed to contact the waste toners received from the developing units.