Having Applied Voltage Patents (Class 399/354)
  • Patent number: 9201378
    Abstract: A cleaning unit, which is included in a process cartridge or an image forming apparatus, includes a brush rotary body to remove toner, a toner collecting rotary body to collect the toner, a toner collecting blade to scrape the toner, and a cleaning blade to scrape the toner falling from the brush rotary body. The image carrier, the brush rotary body, and the toner collecting rotary body rotate in the same direction. The cleaning blade, the brush rotary body, and the toner collecting rotary body are located to cause a tangential line passing through a contact area of the brush rotary body and the toner collecting rotary body on an outer peripheral circle around a shaft of the brush rotary body to have an intersection point intersecting a non-contact surface of the cleaning blade disposed opposite to a contact portion of the cleaning blade with the image carrier.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: December 1, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Akira Asaoka, Hirotaka Hatta, Toshiya Sato, Takeshi Kojima, Hiroyuki Uenishi, Yusuke Ishizuka
  • Patent number: 9170554
    Abstract: A cleaning device includes a brush to contact a photoconductive member, a roller to contact the brush, and a blade. The blade is located along the roller in a longitudinal direction. The blade has a first portion, a second portion, and a bent portion between the first portion and the second portion. A contact surface or edge of the first portion contacts a surface of the roller to remove toner therefrom.
    Type: Grant
    Filed: August 23, 2013
    Date of Patent: October 27, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Takeshi Kojima, Hirotaka Hatta, Toshiya Satoh, Akira Asaoka
  • Patent number: 9008539
    Abstract: A cleaning device for cleaning a cleaning subject, having: a first cleaning member that rotates in a predetermined direction, thereby removing toner from the cleaning subject; a first collecting member that collects the toner removed by the first cleaning member; and a second collecting member that is positioned downstream from the first collecting member in the predetermined direction and collects the toner removed by the first cleaning member, in which, a potential difference of the first collecting member relative to the first cleaning member is opposite in polarity to a potential difference of the second collecting member relative to the first cleaning member, the first collecting member has a potential equal in polarity to that of the first cleaning member, and the potential of the first collecting member is greater in magnitude than the potential of the first cleaning member.
    Type: Grant
    Filed: July 19, 2013
    Date of Patent: April 14, 2015
    Assignee: Konica Minolta, Inc.
    Inventor: Takayuki Takai
  • Patent number: 8965231
    Abstract: An image forming apparatus including: an image carrier; a holding member that contacts with the image carrier and is configured to carry adhering substance received from the image carrier; a belt that contacts with the image carrier; a collection member that contacts with the belt and is configured to collect adhering substance adhered on the belt; and a control device configured to apply a bias to the collection member, detect an electric resistance of the collection member, and control the bias that is applied to the collection member based on the detected electric resistance of the collection member so that the electric resistance of the collection member is converged within a predetermined range, when a cleaning operation of collecting the adhering substance adhered on the holding member from the holding member to the collection member is not performed.
    Type: Grant
    Filed: January 31, 2013
    Date of Patent: February 24, 2015
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Mayu Wakamatsu, Hiroshige Hiramatsu
  • Patent number: 8958738
    Abstract: A cleaning apparatus restrains the scattering of toners in an intermediate transfer member cleaning apparatus thereby to restrain the scattering toners from dirtying the inside of the apparatus. A cleaning container has an anti-scatter portion that enters into a fur brush. The anti-scatter portion blocks a bias roller from a space outside the cleaning apparatus.
    Type: Grant
    Filed: April 4, 2013
    Date of Patent: February 17, 2015
    Assignee: Canon Kabushiki Kaisha
    Inventor: Kentarou Yamana
  • Patent number: 8948647
    Abstract: A belt device incorporatable in an image forming apparatus includes an endless belt, multiple belt tension rollers disposed in contact with an inner surface of the endless belt, a rotary cleaning member to contact a belt wound area of the endless belt facing an opposing roller to form a cleaning nip between the rotary cleaning member and the endless belt and rotate the rotary cleaning member in a direction opposite the belt moving direction within the cleaning nip, and a voltage applier. The cleaning nip is formed by offsetting a center of the cleaning nip upstream from a center of the belt wound area of the endless belt in the belt moving direction and by at least contacting the rotary cleaning member in a range from the belt wound area to a tensioned belt area located upstream from the belt wound area in the belt moving direction.
    Type: Grant
    Filed: January 30, 2014
    Date of Patent: February 3, 2015
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Sugiura, Osamu Naruse, Naomi Sugimoto, Hisashi Kikuchi, Yoshiki Hozumi
  • Publication number: 20140356019
    Abstract: A fur brush roller electrically absorbs and removes a transferred remaining toner on a surface of an image carrier through bias voltage impression. This fur brush roller includes: a foundation cloth, conductive yarns, and insulation yarns. The insulation yarns are subjected to crimp-texturizing processing. The conductive yarns and the insulation yarns are alternately pile-woven to the foundation cloth.
    Type: Application
    Filed: May 29, 2014
    Publication date: December 4, 2014
    Applicant: KYOCERA Document Solutions Inc.
    Inventor: Tetsuya Toichi
  • Patent number: 8879941
    Abstract: A cleaning device and an image forming apparatus capable of suppressing staying of toner in a brush and reducing stress on a brush by discharge products are provided. A cleaning device includes upstream and downstream cleaning brushes and a cleaning roller, which respectively contact the surface of a secondary transfer belt, and first to third bias applying sections. The first bias applying section applies a bias voltage having a polarity opposite to that of the normal toner to the upstream cleaning brush. The second bias applying section applies a bias voltage having a polarity opposite to that of the normal toner and set to be not less than the absolute value of the bias voltage applied to the upstream cleaning brush, to the downstream cleaning brush. The third bias applying section applies a bias voltage having the same polarity as that of the normal toner to the cleaning roller.
    Type: Grant
    Filed: September 13, 2012
    Date of Patent: November 4, 2014
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventor: Taichi Meguro
  • Publication number: 20140321874
    Abstract: A cleaner is provided. The cleaner includes at least two cleaning brush members to electrostatically remove residual toner on an object; a memory; a voltage applicator to apply a voltage to the cleaning brush members based on the setup voltage values stored in the memory; a current detector to detect the amounts of currents flowing through contact portions of the object with the cleaning brush members; and a setup voltage changing device to change the setup voltage values based on the amounts of currents detected by the current detector. The setup voltage changing device performs change of the setup voltage values for the cleaning brush members at a time.
    Type: Application
    Filed: April 17, 2014
    Publication date: October 30, 2014
    Inventors: Kenji Sugiura, Seiichi Kogure, Junpei Fujita, Junichi Ichikawa, Kazuki Yogosawa
  • Publication number: 20140147181
    Abstract: A belt device incorporatable in an image forming apparatus includes an endless belt, multiple belt tension rollers disposed in contact with an inner surface of the endless belt, a rotary cleaning member to contact a belt wound area of the endless belt facing an opposing roller to form a cleaning nip between the rotary cleaning member and the endless belt and rotate the rotary cleaning member in a direction opposite the belt moving direction within the cleaning nip, and a voltage applier. The cleaning nip is formed by offsetting a center of the cleaning nip upstream from a center of the belt wound area of the endless belt in the belt moving direction and by at least contacting the rotary cleaning member in a range from the belt wound area to a tensioned belt area located upstream from the belt wound area in the belt moving direction.
    Type: Application
    Filed: January 30, 2014
    Publication date: May 29, 2014
    Inventors: Kenji SUGIURA, Osamu Naruse, Naomi Sugimoto, Hisashi Kikuchi, Yoshiki Hozumi
  • Patent number: 8731431
    Abstract: A belt device incorporatable in an image forming apparatus includes an endless belt, multiple belt tension rollers disposed in contact with an inner surface of the endless belt, a rotary cleaning member to contact a belt wound area of the endless belt facing an opposing roller to form a cleaning nip between the rotary cleaning member and the endless belt and rotate the rotary cleaning member in a direction opposite the belt moving direction within the cleaning nip, and a voltage applier. The cleaning nip is formed by offsetting a center of the cleaning nip upstream from a center of the belt wound area of the endless belt in the belt moving direction and by at least contacting the rotary cleaning member in a range from the belt wound area to a tensioned belt area located upstream from the belt wound area in the belt moving direction.
    Type: Grant
    Filed: October 27, 2010
    Date of Patent: May 20, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Kenji Sugiura, Osamu Naruse, Naomi Sugimoto, Hisashi Kikuchi, Yoshiki Hozumi
  • Publication number: 20140126942
    Abstract: An image forming apparatus includes a first image forming device, a plurality of second image forming devices, a first bias voltage supply device, and a second bias voltage supply device. The first image forming device and the second image forming device form a toner image. The first bias voltage supply device applies a bias voltage to a first component of the first image forming device. The second bias voltage supply device applies a bias voltage to a second component of each of the plurality of second image forming devices.
    Type: Application
    Filed: September 13, 2013
    Publication date: May 8, 2014
    Inventors: Takeshi KOJIMA, Hirotaka HATTA, Toshiya SATOH, Akira ASAOKA, Hiroyuki UENISHI, Yusuke ISHIZUKA
  • Patent number: 8699898
    Abstract: An image forming apparatus including a setting memory storing multiple voltage settings; two or more voltage applying members each contacting a voltage applied member at respective contact positions close to each other, which are simultaneously being applied with respective voltages selected from the voltage settings; two or more current detectors each detecting a current flowing in the respective contact positions; and a setting changer performing a setting changing processing in which the voltage applied to one of the voltage applying members is changed based on the current detected by the corresponding current detector while a predetermined voltage is applied to the other voltage applying members, so that an optimum current flows in the corresponding contact position.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: April 15, 2014
    Assignee: Ricoh Company, Ltd.
    Inventors: Hisashi Kikuchi, Takaya Muraishi, Kenji Sugiura, Akira Asaoka, Yoshiki Hozumi, Yuu Sakakibara
  • Publication number: 20140093295
    Abstract: A cleaning device includes a brush to contact a photoconductive member, a roller to contact the brush, and a blade. The blade is located along the roller in a longitudinal direction. The blade has a first portion, a second portion, and a bent portion between the first portion and the second portion. A contact surface or edge of the first portion contacts a surface of the roller to remove toner therefrom.
    Type: Application
    Filed: August 23, 2013
    Publication date: April 3, 2014
    Inventors: Takeshi KOJIMA, Hirotaka HATTA, Toshiya SATOH, Akira ASAOKA
  • Patent number: 8599435
    Abstract: What is disclosed is a novel system and method for determining printer component velocity variations by analyzing multiple page test patterns. A test pattern, such as ladder chart targets, is produced that extends across multiple pages. Corresponding page sync signals are recorded and used to maintain phase coherence when analyzing scanned images associated with the multiple pages. An algorithm determines the ladder rung positions and the average photoreceptor velocity between each ladder rung on each scanned image for each page. Interpolation is used for proper phase alignment of the velocity data that spans multiple pages. The long assembly of phase coherent velocity data is then analyzed in one embodiment to determine its frequency content and to estimate the photoreceptor motion quality error sources. Based upon these estimated error sources, a trouble condition or pending maintenance problem with the printer is able to be indentified.
    Type: Grant
    Filed: November 12, 2009
    Date of Patent: December 3, 2013
    Assignee: Xerox Corporation
    Inventors: Peter Paul, Claude S. Fillion
  • Patent number: 8600256
    Abstract: A cleaning device disposed downstream from a transfer position in a direction of rotation of the image carrier to remove toner from the image carrier. The cleaning device includes a normally-charged toner cleaning member to electrostatically remove normally-charged toner from the image carrier, one of a polarity controller to control the toner on the image carrier to have a normal charging polarity and a reversely-charged toner cleaning member to electrostatically remove reversely-charged toner from the image carrier, a pre-cleaning member to electrostatically remove normally-charged toner from the image carrier, a pre-collection member to electrostatically collect the toner from the pre-cleaning member, and a control unit to reduce a voltage applied to the pre-cleaning member immediately after an untransferred toner image is removed from the image carrier by the pre-cleaning member below a voltage applied to the pre-cleaning member during removal of the untransferred toner image.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: December 3, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Yuu Sakakibara, Kenji Sugiura, Naomi Sugimoto, Hisashi Kikuchi, Yoshiki Hozumi, Osamu Naruse
  • Publication number: 20130287428
    Abstract: A cleaning apparatus restrains the scattering of toners in an intermediate transfer member cleaning apparatus thereby to restrain the scattering toners from dirtying the inside of the apparatus. A cleaning container has an anti-scatter portion that enters into a fur brush. The anti-scatter portion blocks a bias roller from a space outside the cleaning apparatus.
    Type: Application
    Filed: April 4, 2013
    Publication date: October 31, 2013
    Applicant: CANON KABUSHIKI KAISHA
    Inventor: Kentarou Yamana
  • Patent number: 8548350
    Abstract: There is provided a pre-cleaning brush roller being a pre-cleaning member which is disposed on an upstream of a normally-charged-toner cleaning brush roller and an oppositely-charged-toner cleaning brush roller in a surface moving direction of an intermediate transfer belt, is applied with a voltage having a polarity opposite to a normal charge polarity of toner, and electrostatically removes the toner having the normal charge polarity.
    Type: Grant
    Filed: March 15, 2011
    Date of Patent: October 1, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Yoshiki Hozumi, Kenji Sugiura, Osamu Naruse, Naomi Sugimoto, Hisashi Kikuchi, Yuu Sakakibara
  • Patent number: 8538308
    Abstract: An image forming device includes a rotation member being held rotatably while making contact with an image carrier, a solid lubricant pressed so as to make contact with the rotation member, and a potential application unit for applying a potential to the rotation member, wherein the material of the solid lubricant and the material of the rotation member are selected so that the charged polarity of the solid lubricant charged due to the friction between the rotation member and the solid lubricant becomes identical with the charged polarity of toner, and the potential to be applied to the rotation member is set so as to be higher or lower than the surface potential of the neutralized image carrier so that the charges having the same polarity as the charged polarity of the solid lubricant are attracted from the rotation member to the neutralized image carrier.
    Type: Grant
    Filed: August 30, 2010
    Date of Patent: September 17, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Kuniaki Kashiwakura, Yoshiki Nakane, Ikuko Kanazawa
  • Patent number: 8532531
    Abstract: A charging member that charges residual toner on an intermediate transfer belt is a charging brush constituted by conductive fibers including an electric insulating portion and an electric conductive portion. Part of the outer circumferential surface of each conductive fiber is the conductive portion.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: September 10, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Masaru Shimura, Masahiro Suzuki, Tsuguhiro Yoshida, Akihiko Uchiyama, Michio Uchida
  • Publication number: 20130195528
    Abstract: Brush rollers rotate in a direction indicated by an arrow while being in contact with an image formation surface to remove toner remaining on the image formation surface from an intermediate transfer belt. The brush rollers each mainly include a rotational shaft and a brush. The brush rollers face the intermediate transfer belt with brush winding directions being opposite from one another. The brush rollers rotate in the direction indicated by the arrow. Thus, seams of the brush rollers can be prevented from being in contact with the same portion on the image formation surface of the intermediate transfer belt.
    Type: Application
    Filed: January 24, 2013
    Publication date: August 1, 2013
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Hidetoshi NOGUCHI, Kazuyoshi Hara, Takahiro Kuroda, Satoru Shibuya
  • Patent number: 8483605
    Abstract: A cleaning device including a normally charged toner cleaning member provided in contact with a cleaning target at a contact position to remove normally charged toner from the cleaning target, a reversely charged toner cleaning member provided in contact with the cleaning target at a contact position upstream from the normally charged toner cleaning member to remove reversely charged toner from the cleaning target, and a pre-cleaning member provided in contact with the cleaning target at a contact position upstream from both the normally and reversely charged toner cleaning members to remove normally charged toner from the cleaning target. The contact position between the pre-cleaning member and the cleaning target has a width wider than a width of the contact position between the normally charged toner cleaning member and the cleaning target and a width of the contact position between the reversely charged toner cleaning member and the cleaning target.
    Type: Grant
    Filed: October 5, 2011
    Date of Patent: July 9, 2013
    Assignee: Ricoh Company, Ltd.
    Inventors: Akira Asaoka, Takaya Muraishi, Kenji Sugiura, Hisashi Kikuchi, Yoshiki Hozumi, Yuu Sakakibara
  • Patent number: 8463154
    Abstract: The image forming apparatus is capable of collecting discharged toner satisfactorily even when a power source for discharging toner from a voltage application member to a moving member and a power source for collecting the discharged toner from the moving member onto an image bearing member are provided in common.
    Type: Grant
    Filed: January 21, 2011
    Date of Patent: June 11, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Tomoo Akizuki, Keisuke Ishizumi, Seiji Saito
  • Patent number: 8457541
    Abstract: An image forming apparatus includes an image carrier, a charging device to charge a surface of the image carrier, disposed across a predetermined gap from the image carrier, a latent image forming device, a developing device to develop a latent image formed on the image carrier into a toner image, a transfer unit to transfer the toner image from the image carrier onto a recording medium, a cleaning member to clean the image carrier after the toner image is transferred therefrom, a lubricant application member to lubricate the image carrier, a polarity adjustor to adjust polarities of the toner and lubricant adhering to the image carrier to be identical to a polarity of a charging bias. The polarity adjustor is disposed facing the image carrier, upstream from the charging device and downstream from the transfer unit in a direction in which the image carrier rotates.
    Type: Grant
    Filed: November 9, 2009
    Date of Patent: June 4, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Akio Kosuge, Shinichi Kawahara, Nobuo Kuwabara, Satoshi Hatori, Yoshinori Ozawa, Daisuke Tomita, Takeshi Shintani
  • Patent number: 8442410
    Abstract: An apparatus and method that cleans a photoreceptor in a printing apparatus is disclosed. The method can include setting a voltage bias of an electrostatic cleaning brush in a printing apparatus to a first voltage bias. The method can include generating an image on media using a photoreceptor. The method can include cleaning the photoreceptor using the electrostatic cleaning brush operating at the first voltage bias. The method can include measuring operating conditions of the printing apparatus to determine an expected film accumulation rate on the photoreceptor. The method can include adjusting the voltage bias on the electrostatic cleaning brush to a second voltage bias based on the measured operating conditions.
    Type: Grant
    Filed: May 20, 2010
    Date of Patent: May 14, 2013
    Assignee: Xerox Corporation
    Inventors: Aaron Michael Burry, Bruce Earl Thayer, Michael F. Zona
  • Patent number: 8437657
    Abstract: A cleaning apparatus including: a normally-charged toner cleaning member that receives a voltage having a polarity reverse to a normal charging polarity of a toner and electostatically removes a toner having the normal charging polarity on a cleaning target; a reversely-charged toner cleaning member that receives a voltage having the same polarity as the normal charging polarity of a toner and electrostatically removes a toner having a polarity reverse to the normal charging polarity on the cleaning target; and a pre-cleaning member that is disposed at an upstream side of the normally-charged toner cleaning member and the reverse-charged toner cleaning member in a surface moving direction of the cleaning target, receives a voltage having a polarity reverse to the normal charging polarity of the toner, and electrostatically removes a toner having the normal charging polarity on the cleaning target, is provided.
    Type: Grant
    Filed: November 29, 2010
    Date of Patent: May 7, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Hisashi Kikuchi, Kenji Sugiura, Osamu Naruse, Naomi Sugimoto, Yoshiki Hozumi, Yuu Sakakibara
  • Patent number: 8433213
    Abstract: A cleaning device includes a normally charged toner cleaning unit, a reversely charged toner cleaning unit, and a pre-cleaning unit. The normally charged toner cleaning unit has a normally charged toner cleaning member, a normally charged toner recovery member, and a normally charged toner scraping member. The reversely charged toner cleaning unit has a reversely charged toner cleaning member, a reversely charged toner recovery member, and a reversely charged toner scraping member. The pre-cleaning unit has a pre-cleaning member, a pre-recovery member, and a pre-scraping member.
    Type: Grant
    Filed: March 14, 2011
    Date of Patent: April 30, 2013
    Assignee: Ricoh Company, Limited
    Inventors: Yoshiki Hozumi, Kenji Sugiura, Osamu Naruse, Naomi Sugimoto, Hisashi Kikuchi, Yuu Sakakibara
  • Patent number: 8351823
    Abstract: An image forming apparatus including an image bearing member having a photosensitive layer and the surface including concave portions having a concave diameter of from 5 to 200 ?m, an irradiation device that irradiates the surface of the image bearing member with light to form a latent electrostatic image thereon, a development device that develops the latent electrostatic image with a development agent containing toner to obtain a visualized image, a transfer device that transfers the visualized image to a transfer medium, a first cleaning brush to which a bias is applied with a polarity reverse to that of the toner remaining on the surface of the image bearing member after the visualized image is transferred, and a second cleaning brush to which a bias is applied with the same polarity as that of the toner remaining on the surface of the image bearing member.
    Type: Grant
    Filed: June 29, 2010
    Date of Patent: January 8, 2013
    Assignee: Ricoh Company, Ltd
    Inventors: Shinji Nohsho, Mayumi Yoshihara, Mihoko Matsumoto, Yukio Fujiwara, Kohsuke Yamamoto
  • Patent number: 8346113
    Abstract: An image forming apparatus comprises: a rotatable image carrier operable to carry a toner image on a surface thereof; a transfer part operable to electrostatically transfer the toner image carried on the surface of the image carrier, onto a transfer material; a cleaning member that is in contact with the surface of the image carrier and that is operable to clean toner remaining on the surface of the image carrier after transfer by the transfer part; and a voltage supplier operable to apply, to the cleaning member, a bias voltage that is for cleaning the surface of the image carrier and that has a polarity opposite to a normal charging polarity of the toner.
    Type: Grant
    Filed: March 9, 2010
    Date of Patent: January 1, 2013
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Satoru Shibuya, Hidetoshi Noguchi, Kazuyoshi Hara
  • Patent number: 8335464
    Abstract: A cleaning brush for use in an electrostatographic imaging apparatus, including a plurality of individual electrically conductive fibers secured to a brush core and having fiber tips relatively remote from the brush core, wherein the cleaning brush includes an electrically conductive plane at a surface of the brush core, or between a surface of the brush core and the electrically conductive fibers, effective for inducing an electrical potential to the conductive fibers when an electrical potential is applied to the electrically conductive plane, and at least one of a relatively non-conductive layer electrically insulating the conductive plane from the conductive fibers, or electrically insulating coatings on tips of the electrically conductive fibers remote from the brush core. The insulative, or non-conductive, layer between the fibers and the conductive plane of the brush prevent excessive current draw.
    Type: Grant
    Filed: June 30, 2010
    Date of Patent: December 18, 2012
    Assignee: Eastman Kodak Company
    Inventors: Jerry A. Pickering, Kurt E. Jones, Patrick M. Lambert, Peter S. Alexandrovich
  • Publication number: 20120315065
    Abstract: An electro-conductive multifilament yarn for forming an electro-conductive brush comprises an electro-conductive fiber containing a synthetic fiber and a carbon nanotube covering a surface of the fiber. The synthetic fiber may have a single-filament fineness of not more than 30 dtex. The synthetic fiber may have 3 to 6 elongated recesses or grooves extending in a longitudinal direction thereof and have a multi-leaves or star-shaped cross-section. The electro-conductive multifilament yarn of the present invention has a high electro-conductivity and may have an electric resistance value of 1×106 to 1×1011 ?/cm at 20° C. Further, the electro-conductivity has a high uniformity; the standard deviation of a logarithm of the electric resistance value may be not more than 1.0.
    Type: Application
    Filed: March 3, 2011
    Publication date: December 13, 2012
    Applicants: Kurarayliving Co., Ltd., National University Corporation Hokkaido University, Tsuchiya TSCO Co., Ltd., Chakyu Dyeing Co., Ltd.
    Inventors: Eiji Akiba, Masaaki Hachiya, Hidetaka Yamauchi, Bunshi Fugetsu
  • Patent number: 8326174
    Abstract: A cleaning unit that can remove particles of residual toner remaining on an image carrier after transfer and be incorporated in a process cartridge removably installable to an image forming apparatus, includes a brush roller disposed in contact with the image carrier to remove the residual toner remaining on the image carrier from the image carrier, and a polarity control member disposed in contact with the image carrier to control charge polarities of the residual toner remaining on the image carrier before the residual toner is removed by the brush roller. The polarity control member includes a first surface where the polarity control member contacts the image carrier, a second surface where the polarity control member does not contact the image carrier, and a conductive filler that is not exposed on the first surface that contacts the image carrier.
    Type: Grant
    Filed: March 16, 2010
    Date of Patent: December 4, 2012
    Assignee: Ricoh Company, Limited.
    Inventors: Osamu Naruse, Hidetoshi Yano, Kenji Sugiura, Naomi Sugimoto, Hiroki Nakamatsu
  • Patent number: 8280295
    Abstract: A cleaning device includes a cleaning member, a collection member, an electrical field generator, and a separation member. The cleaning member has a surface capable of moving while contacting a surface of a cleaning target to remove toner on the surface of the cleaning target. The collection member has a surface capable of moving while contacting the surface of the cleaning member to collect the toner on the surface of the cleaning member. The electrical field generator generates an electrical field to move the toner from the cleaning member to the collection member. The separation member contacts the surface of the collection member to separate the toner on the surface of the collection member. The collection member has a centerline average surface roughness of not more than 0.1 ?m and shows a surface hardness rank of B or higher in a steel-wool scratch test.
    Type: Grant
    Filed: June 11, 2008
    Date of Patent: October 2, 2012
    Assignee: Ricoh Company, Limited
    Inventors: Osamu Naruse, Hidetoshi Yano, Naomi Sugimoto, Kenji Sugiura, Yasuyuki Yamashita
  • Patent number: 8259353
    Abstract: An image forming apparatus is provided. A first cleaning unit is configured to collect a particle deposited on an object. An applying unit is configured to apply a voltage to the first cleaning unit. A first detector is configured to detect a first current flowing between the first cleaning unit and the object. A controller is configured to control the applying unit. When the detected first current becomes equal to or greater than a first predetermined value, the controller controls the applying unit to reduce the voltage applied to the first cleaning unit so as to make the first current smaller than the first predetermined value.
    Type: Grant
    Filed: April 21, 2009
    Date of Patent: September 4, 2012
    Assignee: Brother Kogyo Kabushiki Kaisha
    Inventors: Masahito Hamaya, Tsuyoshi Maruyama
  • Patent number: 8190051
    Abstract: A cleaning device for an intermediate transferring member, comprising: a first cleaning roller that is placed so as to rotate while being made in contact with a surface of the intermediate transferring member; a first bias-applying device that applies a bias voltage to the first cleaning roller; a second cleaning roller that is placed so as to rotate while being made in contact with the surface of the intermediate transferring member on a downstream side from the first cleaning roller in a surface-moving direction of the intermediate transferring member; and a second bias-applying device that applies a bias voltage having a polarity different from that of the bias voltage applied by the first bias-applying device to the second cleaning roller, wherein the first cleaning roller is a brush roller, and the second cleaning roller is a foam roller having a foam layer on a surface thereof, with a cell wall face in the foam layer having an opening ratio in a range of 3% or more to 50% or less, and an image-formin
    Type: Grant
    Filed: December 16, 2009
    Date of Patent: May 29, 2012
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Tetsuo Sano, Junpei Shouno, Hirofumi Nakagawa
  • Patent number: 8190077
    Abstract: A cleaning device 20 for removing a toner remaining on an image bearing member 5A after transfer, including: a polarity control member 23 configured to unify polarities of the remaining toner on the image bearing member 5A, a cleaning member 25 configured to remove the remaining toner having a polarity unified by the polarity control member 23, a collecting member 24 configured to collect the remaining toner transferred to the cleaning member 25, a blade 26 configured to remove the remaining toner from the collecting member 24, and a brush roller 21 configured to sweep the remaining toner on the image bearing member 5A and inject charge, disposed upstream of the polarity control member 23 in the traveling direction of the image bearing member 5A.
    Type: Grant
    Filed: June 15, 2009
    Date of Patent: May 29, 2012
    Assignee: Ricoh Company, Ltd.
    Inventors: Osamu Naruse, Hidetoshi Yano, Kenji Sugiura, Naomi Sugimoto, Hiroki Nakamatsu
  • Patent number: 8180256
    Abstract: An image forming apparatus includes: a photosensitive member; a charging member configured to charge the photosensitive member at a photosensitive member charging position to form an electrostatic image on the photosensitive member; a developing device configured and positioned to develop the electrostatic image with toner to form a toner image; a transferring device configured to transfer the toner image to an image receiving member at a transfer position; a first brush, disposed at a position downstream of the transfer position and upstream of the photosensitive member charging position with respect to a rotational direction of the photosensitive member, configured to charge a residual toner on the photosensitive member at a toner charging position to collect the residual toner to the developing device and to be supplied with a charging bias having a polarity opposite to a regular charge polarity of the toner; and a second brush, disposed at a position downstream of the toner charging position and upstream
    Type: Grant
    Filed: August 5, 2008
    Date of Patent: May 15, 2012
    Assignee: Canon Kabushiki Kaisha
    Inventor: Isao Komatsu
  • Patent number: 8116649
    Abstract: An apparatus (100) and method (200) that adjusts cleaning station operation in a printing apparatus is disclosed. The apparatus can include a charge receptor (110) movable in a process direction P, where the charge receptor can have a main surface (111). The apparatus can include a charger (140) configured to generate a charge on the charge receptor and an image generator (118) configured to generate an image on the charge receptor. The apparatus can include a cleaning station (124) coupled to the charge receptor. The cleaning station can include a cleaning brush (125) coupled to the main surface of the charge receptor. The cleaning station can be configured to clean the main surface of the charge receptor. The apparatus can include a controller (150) coupled to the cleaning station.
    Type: Grant
    Filed: November 30, 2009
    Date of Patent: February 14, 2012
    Assignee: Xerox Corporation
    Inventors: Michael Nicholas Soures, Robert Steven Pozniakas, Roger Joseph Aurio
  • Publication number: 20120003022
    Abstract: A cleaning brush for use in an electrostatographic imaging apparatus, including a plurality of individual electrically conductive fibers secured to a brush core and having fiber tips relatively remote from the brush core, wherein the cleaning brush includes an electrically conductive plane at a surface of the brush core, or between a surface of the brush core and the electrically conductive fibers, effective for inducing an electrical potential to the conductive fibers when an electrical potential is applied to the electrically conductive plane, and at least one of a relatively non-conductive layer electrically insulating the conductive plane from the conductive fibers, or electrically insulating coatings on tips of the electrically conductive fibers remote from the brush core. The insulative, or non-conductive, layer between the fibers and the conductive plane of the brush prevent excessive current draw.
    Type: Application
    Filed: June 30, 2010
    Publication date: January 5, 2012
    Inventors: Jerry A. Pickering, Kurt E. Jones, Patrick M. Lambert, Peter S. Alexandrovich
  • Publication number: 20110286752
    Abstract: An apparatus and method that cleans a photoreceptor in a printing apparatus is disclosed. The method can include setting a voltage bias of an electrostatic cleaning brush in a printing apparatus to a first voltage bias. The method can include generating an image on media using a photoreceptor. The method can include cleaning the photoreceptor using the electrostatic cleaning brush operating at the first voltage bias. The method can include measuring operating conditions of the printing apparatus to determine an expected film accumulation rate on the photoreceptor. The method can include adjusting the voltage bias on the electrostatic cleaning brush to a second voltage bias based on the measured operating conditions.
    Type: Application
    Filed: May 20, 2010
    Publication date: November 24, 2011
    Applicant: XEROX CORPORATION
    Inventors: Aaron Michael BURRY, Bruce Earl Thayer, Michael F. Zona
  • Patent number: 8041281
    Abstract: A cleaning device removes residual toner particles from a cleaning target, such as a photoconductor, which has a moving surface. The cleaning device includes a cleaning brush, a power circuit, and a cleaning member. The cleaning brush includes a brush rotation shaft, and the power circuit applies a first voltage of a first polarity to the brush rotation shaft. The cleaning member applies a second voltage of the first polarity to the cleaning brush. If the first polarity is negative, the cleaning member electrostatically removes toner particles having a positive polarity from the cleaning target. Then, the cleaning brush is triboelectrically charged to a second polarity, which is opposite to the first polarity, by contacting the cleaning target. Accordingly, the cleaning brush also removes residual toner particles having a negative polarity. Thus, the cleaning device removes both positively and negatively charged toner particles to clean the cleaning target.
    Type: Grant
    Filed: February 13, 2008
    Date of Patent: October 18, 2011
    Assignee: Ricoh Company Limited
    Inventors: Naomi Sugimoto, Hidetoshi Yano, Kenji Sugiura, Osamu Naruse, Yasuyuki Yamashita
  • Patent number: 8019268
    Abstract: A polarity controlling device for controlling polarity of residual material on an image bearing member, including a blade, to which a first voltage is applied and which has a contact edge contacted with the surface of the image bearing member to charge the residual material, wherein the contact edge is covered with a resin layer including an electroconductive material. A cleaner including the polarity controlling device; a brush contacting the image bearing member to electrostatically collect the charged residual material utilizing potential difference; a collection member contacting the brush to collect the residual material; and a cleaning blade contacting the collection member to scrape the residual material therefrom. An image forming apparatus including an electrostatic image bearing member; a developing device developing the electrostatic image using a developer including a toner to form a toner image; a transfer device transferring the toner image onto a receiving material; and the cleaner.
    Type: Grant
    Filed: July 22, 2009
    Date of Patent: September 13, 2011
    Assignee: Ricoh Company Limited
    Inventors: Hiroki Nakamatsu, Kenji Sugiura, Naomi Sugimoto, Osamu Naruse, Hidetoshi Yano
  • Patent number: 7979018
    Abstract: An image forming apparatus of the present invention includes: an image carrier on whose surface is formed a latent image; a developing unit that forms a developer image with a developer including toner, carrier and additive; a transfer unit that transfers the developer image onto a recording medium; a recovery member that recovers the developer remaining on the surface of the image carrier after the developer image is transferred; a supply member that supplies, to the image carrier, a recovery promoter; and a voltage application unit that applies, to the supply member, an alternating-current voltage whose amplitude is changed in accordance with a change in the percentages of the amount of toner and the amount of carrier per unit area of a developer image forming portion of the developing unit.
    Type: Grant
    Filed: August 31, 2009
    Date of Patent: July 12, 2011
    Assignee: Fuji Xerox Co., Ltd.
    Inventor: Masaya Nakatsuhara
  • Publication number: 20110158677
    Abstract: There is provided a cleaning apparatus, comprising: a normally-charged toner cleaning member that receives a voltage having a polarity reverse to a normal charging polarity of a toner and electrostatically removes a toner having the normal charging polarity on a cleaning target; a reversely-charged toner cleaning member that receives a voltage having the same polarity as the normal charging polarity of a toner and electrostatically removes a toner having a polarity reverse to the normal charging polarity on the cleaning target; and a pre-cleaning member that is disposed at an upstream side of the normally-charged toner cleaning member and the reversely-charged toner cleaning member in a surface moving direction of the cleaning target, receives a voltage having a polarity reverse to the normal charging polarity of the toner, and electrostatically removes a toner having the normal charging polarity on the cleaning target.
    Type: Application
    Filed: November 29, 2010
    Publication date: June 30, 2011
    Inventors: Hisashi KIKUCHI, Kenji Sugiura, Osamu Naruse, Naomi Sugimoto, Yoshiki Hozumi, Yuu Sakakibara
  • Patent number: 7945202
    Abstract: An cleaning apparatus includes: a first brush roll for removing toner from an image carrier; a second brush roll for removing the toner from the image carrier; a first recovery device for recovering the toner deposited on the first brush roll; a second recovery device for recovering the toner deposited on the second brush roll; a first electric field forming device for forming an electric field between the first brush roll and the image carrier; and a second electric field forming device for forming an electric field between the second brush roll and image carrier, wherein the first brush roll and the second brush roll each has a plurality of electrically conductive yarns arranged on a conductive core, and a resistance R2 of each of the yarns used in the second brush roll is smaller than 1×107 ?/cm.
    Type: Grant
    Filed: April 28, 2009
    Date of Patent: May 17, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Takenobu Kimura, Yotaro Sato, Hajime Kawakami
  • Patent number: 7929880
    Abstract: A cleaning blade anti-peeling apparatus includes a transfer apparatus that transfers a toner image formed on an image carrier to an endless transfer member. An image carrier cleaning member captures toner remaining on the image carrier after the toner image is transferred. A cleaning recovery member recovers the toner on the image carrier cleaning member. A bias applying apparatus applies a bias voltage to move the toner of the image carrier cleaning member to the image carrier. An endless transfer member cleaning blade removes toner adhering to the endless transfer member after the toner image of the endless transfer member is transferred to a transfer material while abutting against the endless transfer member. The following relationship is satisfied: cleaning recovery member width<endless transfer member cleaning blade width<image carrier cleaning member width.
    Type: Grant
    Filed: November 10, 2008
    Date of Patent: April 19, 2011
    Assignee: Seiko Epson Corporation
    Inventor: Masaru Kobashi
  • Patent number: 7903995
    Abstract: A cleaning device including a conductive member configured to charge powder remaining on a member to be cleaned so as to have a single polarity and configured to scrape off at least part of the powder, and disposed to contact with the member to be cleaned; a cleaning member configured to electrically adsorb the powder present on the member to be cleaned, disposed to contact with the member to be cleaned and located downstream of the conductive member in a direction in which the powder is conveyed thereon; a first recovering member configured to electrically adsorb the powder present on the cleaning member and disposed to contact with the cleaning member; and a second recovering member configured to scrape off the powder from the first recovering member and disposed to contact with the first recovering member, wherein the conductive member is constant-current controlled.
    Type: Grant
    Filed: June 24, 2009
    Date of Patent: March 8, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroki Nakamatsu, Kenji Sugiura, Naomi Sugimoto, Osamu Naruse, Hidetoshi Yano
  • Patent number: 7903993
    Abstract: An image forming apparatus capable of maintaining cleaning performance of a cleaning brush and downsizing the apparatus main body. Transfer residual toner accumulated on the cleaning brush is transferred onto a photoreceptor by an electrostatic force, hence the cleaning brush becomes clean and the cleaning performance thereof improves. Therefore, the photoreceptor and a charging roller can be cleaned well by the cleaning brush over a long period of time, and the photoreceptor can be charged well by the charging roller over a long period of time. Moreover, because the transfer residual toner that is transferred from the cleaning brush onto the photoreceptor is recovered by a developing device, it is not necessary to provide the apparatus main body with a toner recovery portion that is specially designed for recovering the transfer residual toner, hence the apparatus main body can be downsized.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: March 8, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yoshio Sakagawa, Tetsumaru Fujita, Yuji Nagatomo
  • Patent number: 7873298
    Abstract: A cleaning device including a polarity control unit to control a charge polarity of residual toner particles, a cleaning member, a surface of which is movable, to electrostatically remove the residual toner particles, provided on a downstream side from the polarity control unit relative to a surface moving direction of an image bearing member, a toner collecting unit to collect the residual toner particles on the cleaning member, and a neutralizing member to neutralize the image bearing member, provided on a downstream side from the polarity control unit and an upstream side from the cleaning member relative to the surface moving direction of the image bearing member.
    Type: Grant
    Filed: January 10, 2008
    Date of Patent: January 18, 2011
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasuyuki Yamashita, Hidetoshi Yano, Oasamu Naruse, Naomi Sugimoto, Kenji Sugiura
  • Publication number: 20100329741
    Abstract: An image forming apparatus including an image bearing member having a photosensitive layer and the surface including concave portions having a concave diameter of from 5 to 200 ?m, an irradiation device that irradiates the surface of the image bearing member with light to form a latent electrostatic image thereon, a development device that develops the latent electrostatic image with a development agent containing toner to obtain a visualized image, a transfer device that transfers the visualized image to a transfer medium, a first cleaning brush to which a bias is applied with a polarity reverse to that of the toner remaining on the surface of the image bearing member after the visualized image is transferred, and a second cleaning brush to which a bias is applied with the same polarity as that of the toner remaining on the surface of the image bearing member.
    Type: Application
    Filed: June 29, 2010
    Publication date: December 30, 2010
    Inventors: Shinji NOHSHO, Mayumi Yoshihara, Mihoko Matsumoto, Yukio Fujiwara, Kohsuke Yamamoto