• 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:
    1530984 Cleaning photoconductive surfaces KIP KK 14 April 1977 [17 April 1976] 15632/77 Heading B6C A photoconductive member is cleaned of residual toner by a cleaning device having a resilient inner member 22, an outer member 23 provided thereon, the outer member, in use, being held against the photoconductive member by the resilience of the inner member 22, the outer member being formed of a material which produces turboelectric charges opposite in polarity to the charge on the photoconductive member just before contact, and scraping means 29 contacting the outer member to remove toner therefrom. The outer member may be, as shown, a surface covering for a resilient roller, it may be an endless band part of which wraps a resilient roller forming the inner member (Figs. 6 and 7, not shown), or both the inner and outer member may be endless bands (Figs. 8 and 9, not shown). If the photoconductive member has an outer layer of polyethyleneterephthalate, then when a positive polarity image is formed, polyethylene is used to form the outer member, and when a negative polarity image is formed, then polyamide is used as the outer member.
    公开号:SU772500A3
    申请号:SU772471404
    申请日:1977-04-15
    公开日:1980-10-15
    发明作者:Такизава Тацудзи；Нода Нобутака
    申请人:Кабусики Кайся Кип (Фирма)；
    IPC主号:
    专利说明:

    one
    The invention relates to the field of electrography, in particular, can be used in the cleaning units of rotary electrophotographic apparatuses. The device r is known. for cleaning the cylinder of the electrographic apparatus from the residual toner, which contains an elastic roller covered with a cleaning sheath, which is in sliding contact with a photosensitive surface. During the operation of the electrophotographic apparatus, the cylinder and the cleaning roller rotate in opposite directions and under the action of the mechanical interaction, the residual toner passes from the cylinder to the roller. Further removal of the developing powder from the roller is also provided for cleaning its sensing surface.
    However, the cleaning element (roller) must be pressed against an intermediate image carrier with a relatively high pressure, which may damage its photosensitive surface and reduce its service life.
    The aim of the invention is to simplify the construction and increase the service life of the cylinder.
    The goal is achieved by removing toner from the photosensitive surface due to electrostatic forces of interaction between the toner particles and the outer shell of the roller, which is made of a material with appropriate triboelectric properties, such as polyethylene or polyamide resin.
    FIG. 1 schematically depicts 5 on an electrophotographic machine with a cleaning mechanism; on. FIG. 2 - version of the opening -. spleen.
    The machine has a drum 1 made of an electrically conductive material, for example, aluminum, which rotates in the direction of the arrow A. A photosensitive is applied to the outer surface of the drum 1.
    25 element 2, on which a latent electrostatic image is created, corresponding to the reproduction of the original pattern. In the considered variant, the photosensitive element 30 consists of a photo conductor - :.
    layer formed by cadmium sulfide powder and an external electrically insulating layer of polyethylene terephthalate.
    Next to the surface of the insulating layer of element 2, there are devices 3 and 4 of the creation of a radical discharge, which precipitates positive and negative ions, respectively, on the photosensitive element. When element 2 is rotated in the direction of arrow A, it passes by these devices, and through device 4 an element 5 is projected an image of the original 5, resulting in a positive electrostatic charge on the insulating layer of element 2, the design of which corresponds to the original. The electrostatic latent image is then developed by a manifestation device, in which the particles of the developing powder 7 are deposited on the surface of the insulating layer of the element 2 and a certain number of particles are attracted to the surface of this layer, the latent electrostatic image on it appears. A known image formed on the surface of the insulating layer under the action of the device 8
    the transfer is then transferred to the terminal carrier 9.
    h
    Typically, a small amount of powder remains on the surface of the insulating layer of element 2 after transferring the powder image to the terminal, carrier 9. For the subsequent use of element 2, it is necessary to remove the rest of the powder from its surface, for which the proposed cleaning mechanism 10 is used. The cleaning mechanism 10 in osnon is a roller 12 mounted on a shaft 11, consisting of an internal relatively thick elastic cylinder made of neoprene rubber, polyurethane rubber, chlorosulfanate polyethylene or tetra, and an outer shell 13 of synthetic plastic material covering the cylinder 14. The outer layer of the shell 13 has a thickness of 50-200 microns, and its inner diameter must be somewhat less than the outer diameter of the cylinder 14 to ensure a strong adhesion of the layer 13 to the cylinder 14. In this position, the roller 12 is pressed against the surface of the element 2, and the elastic properties of the cylinder 14 ensure that the roller 12 fits equally to the element 2 along its entire length.
    The difference of the roller 12 shown in FIG. 2, from the roller shown in FIG. 1 consists in that its outer layer of the shell 13 is formed by a film of synthetic resin, one
    the end 15 of which is attached to the surface of the elastic cylinder 14 and which is wound on the cylinder 14 in a direction opposite to the direction of rotation of the roller 12, while the other end 16 of the film partially overlaps the end 15 attached to the cylinder.
     The cleaning device operates as follows. During the copy cycle, the cleaning roller is pressed against the electrophotographic cylinder, while the roller and cylinder rotate in opposite directions in the directions of arrows A and B. Powder particles remaining on the surface of the cylinder after transfer, approach the place of contact of the roller with the cylinder and under the action mechanical and electrostatic forces are transferred to the cleaning roller, from which they are then removed using a scraper 17. The roller shell 13 is made of a material which, during frictional contact with the outer OEM element 2 triboelectrically charged and carries charges, polarity which is opposite to the polarity of the electrostatic charge applied to the element 2 during its charging. Therefore, by selecting the appropriate material of the roller ridge 13, effective transfer of the developer particles from the cylinder to the roller under the action of triboelectric forces is carried out.
    In the machine (Fig. 1), the outer layer of the photosensitive element is a polyethylene terephthalate film, on which a latent electrical image of positive polarity is formed. Since the residual toner is mainly positively charged, the upper layer of the shell 13 must be a synthetic material so that when it is rubbed on a film of polyethylene terephthalate, triboelectric charges of negative polarity appear on it. Such material can be, for example, polyethylene. In this case, on the outer layer 13, when it is rubbing against the photosensitive element, a high negative potential is formed, which results in a more effective removal of the blemish from the surface of the element 2 as compared with the known device. from a material that, as a result of friction, creates triboelectric charges of the required polarity.
    权利要求:
    Claims (3)
    [1]
    Due to the effect of triboelectric forces between the powder and the roller, cleaning is carried out at a lower pressure of the roller against the cylinder than in the known device, which leads to an increase in the service life of the photocarrier. Claim 1, A device for cleaning the cylinder of an electrographic apparatus, holding a coated elastic roller j mounted with possible rotation, and a scraping device contacting the shell, characterized in that, in order to simplify the design and increase the service life of the cylinder, the shell of the roller Made of synthetic plastic material, the triboelectric charge of which is opposite in sign to the charge, residual toner.
    [2]
    2. A device according to claim 1, characterized in that the roll casing is made of polyethylene.
    [3]
    3. The device according to claim 1, characterized in that the roll casing is made of polyamide CMOJM, Sources of information taken into account in the examination 1, UK Patent 1352752, cl. G 2 H, 1974.
    类似技术:
    公开号 | 公开日 | 专利标题
    SU772500A3|1980-10-15|Device for cleaning cylinder of electrographic apparatus
    JP2542373B2|1996-10-09|Toner carrier
    US7215920B2|2007-05-08|Imaging forming apparatus
    KR910003727B1|1991-06-08|Developing device
    US4259003A|1981-03-31|Imaging surface discharge and cleaning apparatus for electrophotographic copier
    US4165393A|1979-08-21|Magnetic brush developing process for electrostatic images
    GB2174931A|1986-11-19|Thin film developing device
    US3739748A|1973-06-19|Donor for touchdown development
    US4338880A|1982-07-13|Magnetic brush development apparatus for use in electrophotographic copying machine
    US4350749A|1982-09-21|Reverse development method
    US4754304A|1988-06-28|Drum cleaning in an electrophotographic copying machine
    KR940007341B1|1994-08-13|Cleaning method for using in copier and toner used therefor
    US3999849A|1976-12-28|Touchdown ambipolar development
    US4288515A|1981-09-08|Process for reversal development using inductively chargeable magnetic powdery developer
    US4248951A|1981-02-03|Method of image formation with a screen element and charging means
    GB1601495A|1981-10-28|Cleaning apparatus
    US5563691A|1996-10-08|Image-forming apparatus
    US5815777A|1998-09-29|Image forming apparatus
    US4105445A|1978-08-08|Resilient arcuate surface containing photoconductor
    US3893413A|1975-07-08|Xerographic developing apparatus
    CA1101050A|1981-05-12|Cleaning devices for use in electrophotographic apparatus
    EP0141663B1|1988-08-03|Electrostatic development apparatus
    US4043659A|1977-08-23|Cleaning blade toner arrestor
    JP3171489B2|2001-05-28|Image carrier cleaning device
    US4149486A|1979-04-17|Transfer development apparatus using self-spacing donor member
    同族专利:
    公开号 | 公开日
    DE2716423A1|1977-11-03|
    FR2348512B1|1983-10-21|
    US4253761A|1981-03-03|
    FR2348512A1|1977-11-10|
    NL7704024A|1977-10-19|
    JPS52127240A|1977-10-25|
    CA1098167A|1981-03-24|
    NL183681C|1988-12-16|
    DE2716423C2|1985-01-24|
    GB1530984A|1978-11-01|
    NL183681B|1988-07-18|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3510903A|1968-05-01|1970-05-12|Eastman Kodak Co|Endless cleaning web|
    BE759078A|1969-12-04|1971-05-18|Agfa Gevaert Nv|ELECTROSTATIC COPIER|
    US3867170A|1969-12-19|1975-02-18|Xerox Corp|Method for cleaning liquid developers|
    US3776632A|1972-02-24|1973-12-04|Savin Business Machines Corp|Cleaning mechanism for photoconductive surfaces|
    US3807853A|1972-08-09|1974-04-30|Xerox Corp|Electrophotographic cleaning apparatus|
    US3815989A|1972-12-14|1974-06-11|Nashua Corp|Electrophotographic copy systems|
    US3884572A|1972-12-26|1975-05-20|Ibm|Cleaning apparatus|
    US3792925A|1973-01-29|1974-02-19|Sperry Rand Corp|Preloading web cleaner|
    CH555552A|1973-07-23|1974-10-31|Turlabor Ag|METHOD AND DEVICE FOR INCREASING THE SERVICE LIFE OF AN ELECTROGRAPHIC LAYER.|
    JPS5079337A|1973-11-12|1975-06-27|
    CA1071692A|1973-12-28|1980-02-12|Itek Corporation|Electrophotographic cleaning apparatus|
    DE2435596A1|1974-07-22|1976-02-05|Dreusicke & Co W|Seamless capillary roller coatings for office machines - comprise finely capillary fibres in admixture with a vulcanised elastomer or thermoplast|
    US3980494A|1975-01-02|1976-09-14|Beatty Charles L|Method of reducing friction in blade cleaning of imaging surfaces|US4398820A|1981-05-18|1983-08-16|Xerox Corporation|Cleaning system|
    JPS58141269U|1982-03-19|1983-09-22|
    JPH0373873B2|1982-04-20|1991-11-25|
    US4588279A|1982-10-27|1986-05-13|Konishiroku Photo Industry Co., Ltd.|Cleaning roller intermediate transfer member|
    JPS59158166U|1983-04-09|1984-10-23|
    US4739370A|1983-11-16|1988-04-19|Canon Kabushiki Kaisha|Cleaning device|
    JPH0435905Y2|1984-09-20|1992-08-25|
    JPS62137460U|1986-02-21|1987-08-29|
    JPS634571U|1986-06-28|1988-01-13|
    US4864331A|1986-10-22|1989-09-05|Markem Corporation|Offset electrostatic imaging process|
    US5148227A|1989-07-13|1992-09-15|Canon Kabushiki Kaisha|Cleaning roller and cleaning apparatus|
    US5177533A|1991-04-23|1993-01-05|Mit Industrial Co., Ltd.|Image forming apparatus|
    US5797078A|1993-07-09|1998-08-18|Xerox Corporation|Photoreceptor comet prevention brush|
    US5568243A|1994-07-01|1996-10-22|Eastman Kodak Company|Cleaning mechanism for a transfer drum of a reproduction apparatus|
    US8135318B2|2007-09-11|2012-03-13|Kabushiki Kaisha Toshiba|Image forming apparatus, image forming method, and secondary transfer unit|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP4411676A|JPS52127240A|1976-04-17|1976-04-17|Toner remover for electrographic printer|
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