With Subsequent Imaging Member Cleaning Patents (Class 430/119.7)
  • Patent number: 9300832
    Abstract: An image reader includes a first image reading unit that reads first image data by scanning one surface of a document at a first resolution corresponding to a magnification ratio and a predetermined first scan cycle; and a second image reading unit that accumulates light radiated from a light source and reads second image data by scanning other surface of the document at a fixed second resolution and a second scan cycle corresponding to the magnification ratio, wherein the second image reading unit controls light accumulation time of the light radiated from the light source to be constant.
    Type: Grant
    Filed: March 3, 2011
    Date of Patent: March 29, 2016
    Assignee: RICOH COMPANY, LIMITED
    Inventor: Yoshihisa Soeda
  • Patent number: 9146523
    Abstract: A cleaner includes a rectangle elastic blade contacting a surface-moving object in a counter direction to remove an extraneous matter adhering to the surface of the object. An apical surface of the elastic blade in a longitudinal direction comprises a fluorine atom in an amount not less than 16.3% by atom when measured by X-ray photoelectron spectroscopy.
    Type: Grant
    Filed: October 2, 2013
    Date of Patent: September 29, 2015
    Assignee: RICOH COMPANY, LTD.
    Inventors: Toshiyuki Kabata, Momoko Shionoiri
  • Publication number: 20140349228
    Abstract: A toner for electrostatic latent image development of the present invention includes toner particles containing toner mother particles and an external additive. The external additive contains fatty acid metal salt particles, and a volume based particle diameter (size) distribution of the fatty acid metal salt particles has two peaks on a side of smaller size and a side of larger size, respectively. A volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of smaller size is 3.0 ?m or smaller and a volume based mean particle diameter of the fatty acid metal salt particles having the peak on the side of larger size is larger than a volume based mean particle diameter of the toner mother particles.
    Type: Application
    Filed: May 22, 2014
    Publication date: November 27, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Futoshi KADONOME, Yukio HOSOYA, Kazue NAKAMURA, Saburou HIRAOKA, Yasuko UCHINO
  • Publication number: 20140220488
    Abstract: Provided is an image forming method, in which excellent cleaning properties are obtained for a long period of time even when the process is employed to an image forming apparatus with a charging roller for charging a photoreceptor, and a favorable image can be formed while inhibiting occurrence of a black spots-like image defect even in a high temperature and high humidity environment. In the image forming method, charging of a photoreceptor in a charging step is performed by a charging roller. A toner for electrostatic image development includes toner base particles added with an external additive. The external additive contains at least first external additive particles composed of a polytetrafluoroethylene and second external additive particles composed of at least one selected from a fatty acid metal salt and an amide wax.
    Type: Application
    Filed: January 20, 2014
    Publication date: August 7, 2014
    Applicant: Konica Minolta, Inc.
    Inventors: Yukio HOSOYA, Futoshi KADONOME, Kazue NAKAMURA, Saburou HIRAOKA, Yasuko UCHINO
  • Publication number: 20130330104
    Abstract: A photoreceptor includes an electroconductive substrate, and a laminate structure formed of at least a charge generating layer and a charge transport layer and provided overlying the electroconductive substrate, wherein the charge transport layer contains a charge transport material, a compound represented by the following formula 1 and a compound represented by the following formula 2: in the formula 1, R1 and R2 each independently represent substituted or non-substituted alkyl groups or aromatic hydrocarbon groups and one of R1 and R2 represents a substituted or non-substituted aromatic hydrocarbon group, R1 and R2 bonded to the same nitrogen atom may be bonded together to form a substituted or non-substituted nitrogen-containing heterocyclic group, and Ar represents a substituted or non-substituted hydrocarbon group; in the formula 2, R3 and R4 each independently represent substituted or non-substituted alkyl groups or aromatic hydrocarbon groups.
    Type: Application
    Filed: May 31, 2013
    Publication date: December 12, 2013
    Applicant: RICOH COMPANY, LTD.
    Inventors: Keisuke Shimoyama, Akihiro Sugino, Mitsuaki Hirose, Tomoharu Asano, Noboru Toriu, Hideo Nakamori
  • Patent number: 8404423
    Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital apparatuses. Embodiments pertain to an improved electrophotographic imaging member used in customer replaceable units (CRU) comprising a very thin outer layer on the imaging member surface, where the outer layer comprises healing materials that act as a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced wear and deletions in high humidity conditions.
    Type: Grant
    Filed: July 28, 2010
    Date of Patent: March 26, 2013
    Assignee: Xerox Corporation
    Inventors: Woo Soo Kim, Gaetano J. Lavigne, Cuong Vong, Johann Junginger, Vladislav Skorokhod, Nan-Xing Hu
  • Patent number: 8404422
    Abstract: The presently disclosed embodiments relate generally to layers that are useful in imaging apparatus members and components, for use in electrophotographic, including digital, apparatuses. Embodiments pertain to an improved electrophotographic imaging member comprising a very thin outer layer on the imaging member surface, where the outer layer comprises healing materials that act as a barrier against moisture and/or surface contaminants. The improved imaging member exhibits improved xerographic performance, such as reduced wear and deletions in high humidity conditions. Embodiments also pertain to methods for making the improved electrophotographic imaging member.
    Type: Grant
    Filed: August 10, 2009
    Date of Patent: March 26, 2013
    Assignee: Xerox Corporation
    Inventors: Woo Soo Kim, Nan-Xing Hu, Vladislav Skorokhod, Cuong Vong, Gregory McGuire
  • Patent number: 8034525
    Abstract: An image forming method is disclosed, which includes steps of cleaning toner remaining on a photoreceptor surface by a cleaning blade which is arranged on counter direction to rotation direction of the photoreceptor, supplying a fatty acid metal salt onto the photoreceptor surface after the cleaning, spreading the supplied fatty acid metal salt on the photoreceptor surface by using a spreading blade which is arranged on trail direction to rotation direction of the photoreceptor, charging the photoreceptor by a charging member, exposing the photoreceptor to form a latent image, developing the latent image by a developer to form a toner image on the photoreceptor, and transferring the toner image onto an image receiving member by a transfer roller facing to the photoreceptor through the image receiving material, in which the toner comprises a binder resin and a colorant, in which the toner has a glass transition point of from 20 to 45° C.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: October 11, 2011
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yoshiyasu Matsumoto, Kenji Yamane, Hiroyuki Kozuru
  • Publication number: 20110143277
    Abstract: It is an object of the present invention to provide a toner having the transfer efficiency and the cleanability in combination, exhibiting excellent stress resistance, and ensuring the low-temperature fixing. A toner characterized in that the average circularity of the above-described toner is 0.960 or more, and 0.985 or less, where the average circularity is analyzed by dividing particles having a circle equivalent diameter of 1.98 ?m or more, and 200.00 ?m or less, the number A of toners having a circularity of 0.990 or more, and 1.000 or less is 25.0 percent by the number or less, and the percentage of the number of particles B having a circle equivalent diameter of 0.50 ?m or more, and 1.98 ?m or less relative to the total particles of 0.50 ?m or more, and 200.00 ?m or less is 10.0 percent by the number or less.
    Type: Application
    Filed: December 10, 2010
    Publication date: June 16, 2011
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Yoshiaki Shiotari, Kosuke Fukudome, Nozomu Komatsu, Kunihiko Nakamura, Kentaro Kamae, Hiroyuki Fujikawa, Koh Ishigami, Takayuki Itakura, Hironori Minagawa
  • Publication number: 20100183972
    Abstract: An image-bearing member protecting agent including: a hydrophobic organic compound (A); an inorganic lubricant (B); and inorganic fine particles (C), wherein each of the inorganic fine particles (C) has a specific surface area of 2.0 m2/g to 6.5 m2/g.
    Type: Application
    Filed: January 8, 2010
    Publication date: July 22, 2010
    Inventors: Kunio Hasegawa, Hiroshi Nakai, Shinya Tanaka
  • Patent number: 7666564
    Abstract: Disclosed is an image forming method employing an apparatus comprising a plurality of toner image forming units, which forms a plurality of toner images and transfer them onto an intermediate transferring member in sequence, and the transferred images is transferred onto a recording sheet. The developer is a non-magnetic single component toner and turbidity of toners of each color is less than 60; and the maximum turbidity difference among the toners is 5-45.
    Type: Grant
    Filed: October 19, 2004
    Date of Patent: February 23, 2010
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Masao Asano, Tomoe Kitani
  • Publication number: 20090176169
    Abstract: A toner for developing electrostatic latent images, including a binder resin; and a colorant, wherein the toner further includes propyleneglycolmonomethylether in an amount of from 30 to 200 ppm.
    Type: Application
    Filed: January 5, 2009
    Publication date: July 9, 2009
    Inventor: Kumi HASEGAWA
  • Patent number: 7459257
    Abstract: An image forming apparatus of the present invention comprises an image carrier, a lubricant application device that applies a first lubricant to the image carrier surface, and a developing device that houses a developer to which a second lubricant is added and develops the electrostatic latent image formed on the image carrier. Here, the pure water contact angle ?1 of the first lubricant and the pure water contact angle ?2 of the second lubricant have the following relationship, ?1??2. Furthermore, a frictional coefficient of the second lubricant may be larger than a frictional coefficient of the first lubricant.
    Type: Grant
    Filed: December 9, 2004
    Date of Patent: December 2, 2008
    Assignee: Konica Minolta Business Technologies, Inc.
    Inventors: Yasuo Shirodai, Kuniaki Kashiwakura
  • Patent number: 7351507
    Abstract: An electrophotographic photoreceptor and image processing method, the photoreceptor including an electroconductive substrate; an undercoat layer overlying the electroconductive substrate; and a photosensitive layer overlying the undercoat layer, wherein the undercoat layer includes a titanium oxide; an oil-free alkyd resin; a block isocyanate compound; and a metal oxide different from the titanium oxide, having an average particle diameter smaller than an average particle diameter thereof.
    Type: Grant
    Filed: September 15, 2004
    Date of Patent: April 1, 2008
    Assignee: Ricoh Company, Limited
    Inventors: Suzuka Nozoe, Takehiko Kinoshita
  • Publication number: 20070254233
    Abstract: In an image forming method in which a toner image, which is visualized via an electrostatic latent image formed on an electrophotographic photoreceptor, employing a developer incorporating toner, is transferred onto a recording material followed by fixing, and any residual toner remaining on the electrophotographic photoreceptor is removed, an image forming method in which an electrophotographic photoreceptor and a toner which satisfy specified requirements are employed and image formation is carried out while feeding a surface energy lowering agent from the developer onto the aforesaid electrophotographic photoreceptor, and an image forming apparatus employing the same.
    Type: Application
    Filed: April 18, 2007
    Publication date: November 1, 2007
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Shingo FUJIMOTO, Takao YAMANOUCHI, Hirofumi KOGA, Masaaki KONDO, Shiro HIRANO, Junya ONISHI