• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A developing device for a transfer photographic printer is disclosed. The developer for a transfer photograph type printer removes a developing roller charged to a predetermined potential, a toner supply unit for supplying a toner mixture to the developing roller, and a toner mixture remaining on the outer circumferential surface of the developing roller. A toner mixture spaced apart from each other and provided with a cleaning roller charged to a potential lower than the potential charged to the developing roller, and the toner mixture remaining on the outer peripheral surface of the developing roller using the potential difference charged between the developing roller and the cleaning roller; And cleaning means for attaching to the cleaning roller.
    公开号:KR19990015014A
    申请号:KR1019970036882
    申请日:1997-08-01
    公开日:1999-03-05
    发明作者:김종우
    申请人:윤종용；삼성전자 주식회사；
    IPC主号:
    专利说明:

    Developer for Transfer Photo Printers
    BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a developer for a transfer photo type printer, and more particularly, to a developer for a transfer photo type printer for electrically removing a toner mixture remaining in a developing roller.
    In general, electrophotographic printers are applied to laser printers and copiers for computers, which are dry using powder toner as a developing method and wet using toner powder mixed in a liquid carrier. In both of these methods, a desired image can be printed on paper by transferring a charged toner or a liquid toner to a photosensitive medium having a latent electrostatic image formed thereon, and then passing the paper between the rotating transfer media in contact with the photosensitive medium. have.
    1 is a diagram showing a schematic configuration of a conventional transfer photograph type printer, the configuration of which is as follows.
    Referring to the drawings, the photosensitive belt 11 is rotatably supported by the driving roller 12, the backup roller 13 and the steering roller 14 is installed. Then, on the rotation path of the photosensitive belt 11, a laser scanning device 15 for scanning a laser on the photosensitive belt 11 to form an electrostatic latent image and a developer 16 for forming a toner image on the photosensitive belt 11 are provided. Plural numbers are installed. And the corona apparatus 17 which charges the surface of the photosensitive belt 11 with a uniform electric potential is provided on the rotation path of the photosensitive belt 11.
    In the transfer photograph type printer having the above-described configuration, the photosensitive belt 11 is capable of being charged and its potential can be controlled by irradiation of light. The driving roller 12, the backup roller 13, and the steering roller It is supported by 14 to rotate the predetermined trajectory. At this time, after the photosensitive belt 11 is charged to a uniform electric potential by the corona device 17, an electrostatic latent image is formed on the surface of the photosensitive belt 11 by the laser scanning device 15. The electrostatic latent image is formed by selectively discharging the laser beam to the surface of the photosensitive belt 11 charged at a uniform electric potential, so that the electric potential drops only at the corresponding portion. Then, a predetermined toner is attached to the portion of the photosensitive belt 11 on which the electrostatic latent image is formed by the developer 16 to form a toner image.
    FIG. 2 is a diagram schematically showing the structure of a conventional developing device used in the transfer photograph type printer as described above.
    As shown in the figure, a conventional developer for a transfer photograph type printer supplies a developing tank 24 provided with a developing roller 21, a first squeegee roller 22 and a second squeegee roller 23, and a toner mixture. It comprises a toner supply unit 25.
    The process of forming the toner image on the photosensitive belt 27 by the developer as described above is as follows.
    The developing roller 21 has its outer circumferential surface charged to a predetermined potential and is rotated by being spaced apart from the photosensitive belt 27 by a predetermined interval. When the photosensitive belt 27 having the electrostatic latent image is moved at a predetermined interval from the developing roller 21, the toner mixture is supplied to the outer circumferential surface of the developing roller 21 by the toner supply unit 25, whereby the photosensitive belt 27 The toner mixture adheres to the electrostatic latent image of the photosensitive belt 27 due to the potential difference charged on the surface of the surface and the outer circumferential surface of the developing roller 21. Then, when the portion of the photosensitive belt 27 to which the toner mixture is attached passes through the first squeegee roller 22 and the second squeegee roller 23, the liquid carrier is removed from the toner mixture to thin the photosensitive belt 27. Toner image is formed.
    Then, the liquid carrier and the toner mixture supplied to the developing roller 21 separated by the first squeegee roller 22 and the second squeegee roller 23 are not attached to the photosensitive belt 27 through the above-described process. The toner mixture is recovered and recycled to a toner storage tank (not shown) connected to the developing tank 24.
    Then, in order to remove the toner mixture remaining on the surface of the developing roller 21 from the developing roller 21, a cleaning roller 28 which rotates while being in contact with the developing roller 21 is used. 3 is a perspective view showing an example of a cleaning roller used in a conventional developer for a transfer photographic printer.
    The cleaning roller 30 has a roller shaft 33 having a hollow portion 31 and a plurality of communication holes 32 formed on the outer circumferential surface thereof in communication with the hollow portion 31 and the outer circumferential surface of the roller shaft 33. It is configured to include a plurality of cleaning ring member 34 is installed. In the above-described cleaning roller 30, the toner mixture supplied to the hollow 31 is transferred to the cleaning ring member 34 through each communication hole 32, and the cleaning ring member 34 is the developing roller 21 (FIG. 2). The toner mixture remaining on the outer circumferential surface of the developing roller 21 is removed while contacting the outer circumferential surface of the " However, since the above-described cleaning roller 30 is made of the roller shaft 33 and the plurality of cleaning ring members 34, there is a problem that its manufacturing is not easy. In addition, wear occurs because the cleaning ring member 34 rotates while contacting the developing roller 21. If the cleaning ring member 34 does not contact the developing roller 21 due to such wear, the developing ring 21 The toner mixture remaining on the surface of the roller 21 is not properly removed. Then, when the toner mixture remaining on the surface of the developing roller 21 is not properly removed, the developing roller 21 is formed unevenly on the surface of the developing roller 21 to supply the toner mixture to the photosensitive belt 21. Will not function properly.
    The present invention has been made in view of the above problems, and by cleaning the toner mixture remaining in the developing roller, wear does not occur and provides a developer for a transfer photo type printer having a simple cleaning means. There is a purpose.
    1 is a schematic configuration diagram of a conventional transfer photograph type printer;
    2 is a schematic configuration diagram of a developer for a conventional transfer photograph type printer;
    3 is a perspective view showing an example of a cleaning roller used in a developer for a conventional transfer photograph type printer;
    4 is a schematic configuration diagram of an embodiment of a developer for a transfer photographic printer according to the present invention.
    Explanation of symbols for main parts of the drawings
    11.27,41 Photosensitive belt 12. Driving roller
    13.Backup Roller 14.Steering Roller
    15.Laser injection device 16.Developer
    Development roller 22.1 Squeeze roller
    23.2nd squeeze roller 24. Developing tank
    25.toner supply part 28,44 cleaning roller
    45.Blade
    In order to achieve the above object, the present invention is to remove the developing roller having a surface that can be charged to a predetermined potential, the toner supply unit for supplying the toner mixture to the developing roller, and the toner mixture remaining on the outer peripheral surface of the developing roller. In the developing apparatus for a transfer photographic printer including cleaning means, the cleaning means is provided spaced apart from the developing roller by a predetermined interval, and includes a cleaning roller whose surface is charged at a potential lower than that of the developing roller. It features.
    And in the present invention, it is preferable that the cleaning means further comprises a blade provided so that one end is in contact with the outer peripheral surface of the cleaning roller.
    Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.
    Figure 4 shows an embodiment of a developer for a transfer photographic printer according to the present invention.
    As shown in the figure, the developing apparatus for a transfer photographic printer according to the present invention is a developing roller 42 which is charged at a predetermined potential and is spaced apart from the photosensitive belt 41 by a predetermined interval, and the toner in the developing roller 42. And a cleaning means for removing the toner mixture remaining on the outer circumferential surface of the developing roller 42 by using a potential difference with the developing roller 42. .
    The above-described cleaning means includes a cleaning roller 44 which is spaced apart from the developing roller 42 by a predetermined distance, which is more than the potential charged by the power supply unit (not shown) to the developing roller 42. It is charged to a low electric potential and rotates at a predetermined interval from the developing roller 42. For example, when the photosensitive belt 41 is charged to 800V, the electrostatic latent image is formed to 150V, and the developing roller 42 is charged to about 650V, the cleaning roller 44 can be charged to about 400V, and the cleaning roller is (44) The material of the surface may be a metal capable of energizing.
    In addition, it is preferable that the above-described cleaning means has a blade 45 installed at one end thereof in contact with the outer circumferential surface of the cleaning roller 44. Here, the blade 45 is in contact with the outer circumferential surface of the cleaning roller 44 to separate the toner mixture attached to the outer circumferential surface of the cleaning roller 44 from the cleaning roller 44 when the cleaning roller 44 rotates. The cleaning roller 44 and the blade 45 are preferably installed in such a state that at least a part thereof is accommodated in the toner mixture so that the attached toner mixture is not solidified.
    Looking at the operation of the developer for a transfer photo type printer according to the present invention as described above are as follows.
    In the gap between the developing roller 42 and the photosensitive belt 41 charged to a predetermined potential via the toner supply part 43, the toner mixture is formed on the surface of the photosensitive belt 41 by a potential difference with the surface of the photosensitive belt 41. It is attached to the formed electrostatic latent image. At this time, the toner mixture not attached to the photosensitive belt 41 remains on the outer circumferential surface of the developing roller 42, and moves as the developing roller 42 rotates. Then, when the portion of the developing roller 42 in which the toner mixture remains is close to the cleaning roller 44, the toner mixture remaining in the developing roller 42 by the potential difference with the cleaning roller 44 is transferred to the cleaning roller 44. Attached. Since the blade 45 is provided in contact with the outer circumferential surface of the cleaning roller 44, the toner mixture attached to the outer circumferential surface of the cleaning roller 44 is cleaned by the blade 45 as the cleaning roller 44 rotates. It is separated from the roller 44.
    The developing apparatus for a transfer photographic printer according to the present invention uses a potential difference with a developing roller to clean a toner mixture remaining on an outer circumferential surface of the developing roller, and to contact the outer circumferential surface of the cleaning roller to separate the toner mixture from the cleaning roller. By providing the blade, the toner mixture remaining in the developing roller can be efficiently removed, and since the friction with the developing roller does not occur, the durability thereof is improved. In addition, the developing device for a transfer photographic printer according to the present invention is simple to manufacture and the cost is reduced.
    权利要求:
    Claims (4)
    [1" claim-type="Currently amended] A developing photographic printer, comprising: a developing roller having a surface capable of charging to a predetermined potential; a toner supply unit for supplying a toner mixture to the developing roller; and cleaning means for removing a toner mixture remaining on an outer circumferential surface of the developing roller. ,
    The cleaning means,
    And a cleaning roller, the surface of which is spaced apart from the developing roller by a predetermined interval and whose surface is charged at a potential lower than that of the developing roller.
    [2" claim-type="Currently amended] The method of claim 1,
    The cleaning means,
    And a blade provided at one end thereof in contact with the outer circumferential surface of the cleaning roller.
    [3" claim-type="Currently amended] The method of claim 1,
    The cleaning means,
    And a toner mixture remaining on an outer circumferential surface of the developing roller to the cleaning roller by using a potential difference charged between the developing roller and the cleaning roller.
    [4" claim-type="Currently amended] The method of claim 1,
    In the cleaning roller,
    And at least a portion of which is submerged in the toner mixture.
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    同族专利:
    公开号 | 公开日
    KR100243237B1|2000-02-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    1997-08-01|Application filed by 윤종용, 삼성전자 주식회사
    1997-08-01|Priority to KR1019970036882A
    1999-03-05|Publication of KR19990015014A
    2000-02-01|Application granted
    2000-02-01|Publication of KR100243237B1
    优先权:
    申请号 | 申请日 | 专利标题
    KR1019970036882A|KR100243237B1|1997-08-01|1997-08-01|Development apparatus in electrographic printer|
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