Product Having Overlayer On Radiation-conductive Layer Patents (Class 430/66)
  • Patent number: 10705441
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer disposed on the conductive substrate.
    Type: Grant
    Filed: July 19, 2019
    Date of Patent: July 7, 2020
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Ryosuke Fujii, Wataru Yamada, Masahiro Iwasaki, Keisuke Kusano, Taisuke Fukui, Yuto Okazaki
  • Patent number: 10691032
    Abstract: An improved organic photoconductor drum having a protective overcoat layer and method to make the same is provided. The protective overcoat layer is prepared from a curable composition including nano metal oxide particles sized less than 400 nm in combination with an urethane acrylate resin having at least 6 functional groups.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: June 23, 2020
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Weimei Luo, Mark Thomas Bellino
  • Patent number: 10684564
    Abstract: An electrophotographic photoreceptor includes a cylindrical substrate; and a surface layer located on an outer surface of the cylindrical substrate. At least a substrate central portion in a cylindrical axial direction of the outer surface of the cylindrical substrate is formed as a rough surface, and a surface roughness of a surface-layer central portion in the cylindrical axial direction of an outer surface of the surface layer is larger than that of at least one of two surface-layer end portions in the cylindrical axial direction of the outer surface of the surface layer. An image forming apparatus includes the electrophotographic photoreceptor; and a peripheral member capable of contacting a surface of the electrophotographic photoreceptor.
    Type: Grant
    Filed: December 27, 2017
    Date of Patent: June 16, 2020
    Assignee: KYOCERA Corporation
    Inventor: Yoshiaki Fujiwara
  • Patent number: 10678153
    Abstract: An improved organic photoconductor drum having a protective overcoat layer and method to make the same is provided. The protective overcoat layer is prepared from a curable composition including nano metal oxide particles sized less than 400 nm in combination with an urethane acrylate resin having at least 6 functional groups.
    Type: Grant
    Filed: April 30, 2019
    Date of Patent: June 9, 2020
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Weimei Luo, Mark Thomas Bellino
  • Patent number: 10663875
    Abstract: An electrophotographic photoreceptor includes an outermost layer formed of a polymerized cured product of a composition containing a polymerizable monomer and metal oxide particles surface-treated with a surface treatment agent having a silicone chain, wherein a ratio (r/r?) between a number average primary particle diameter (r) of metal oxide particles which are untreated base particles of the metal oxide particles surface-treated with the surface treatment agent having a silicone chain and a sphere equivalent particle diameter (r?) of the untreated base particles calculated from a specific surface area measured by a nitrogen adsorption method is 1.5 or more and 6.0 or less, and a surface treatment amount with the surface treatment agent having a silicone chain per surface area of the untreated base particles is 0.0005 g/m2 or more and 0.0015 g/m2 or less.
    Type: Grant
    Filed: July 22, 2019
    Date of Patent: May 26, 2020
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tomoko Sakimura, Hiroki Takao, Mayuko Matsusaki, Kengo Ikeda
  • Patent number: 10642177
    Abstract: Provided is an image-forming apparatus including: an electrophotographic photosensitive member including a support, a photosensitive layer, and a protective layer in the stated order; a charging unit; an exposing unit; a developing unit; a transferring unit; and a cleaning unit configured to clean off the toner, which remains on the electrophotographic photosensitive member after the transfer of the toner image from the electrophotographic photosensitive member by the transferring unit, with a cleaning blade, wherein the electrophotographic photosensitive member includes, on a surface thereof, a fatty acid metal salt-supplying unit configured to supply a fatty acid metal salt having 16 or more and 18 or less carbon atoms, and wherein the protective layer has a triphenylamine structure, one of an acryloyloxy group and a methacryloyloxy group, and a specific structure.
    Type: Grant
    Filed: February 27, 2019
    Date of Patent: May 5, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Nobuhiro Nakamura, Tsutomu Nishida, Atsushi Okuda, Yuka Ishiduka, Hiroyuki Watanabe, Hideharu Shimozawa
  • Patent number: 10545453
    Abstract: Provided are a process cartridge and an electrophotographic apparatus each suppressed in fluctuation in charging potential at the time of its long-term use. The process cartridge includes: an electrophotographic photosensitive member having a surface layer containing a resin and a charge-transporting substance; and a charging member configured to charge the electrophotographic photosensitive member, wherein an average of Martens hardnesses of the surface layer of the electrophotographic photosensitive member measured at a pushing force of 7 mN is 245 N/mm2 or more, and wherein in a core defined by three-dimensional surface texture standards (ISO 25178-2:2012) of the surface of the charging member, an average of Martens hardnesses measured at a pushing force of 0.04 mN is 2 N/mm2 or more and 20 N/mm2 or less, and an average of adhesivenesses measured with a scanning probe microscope in a field of view of 2-micrometer square is 70 mV or less.
    Type: Grant
    Filed: November 20, 2018
    Date of Patent: January 28, 2020
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Shuhei Iwasaki, Kazunori Noguchi, Harunobu Ogaki, Tatsuya Yamaai, Daisuke Miura, Akira Sakakibara, Takumi Furukawa, Yuya Tomomizu
  • Patent number: 10545417
    Abstract: An electrophotographic photoconductor is provided. The electrophotographic photoconductor includes a conductive substrate, a photosensitive layer, and a surface layer containing fluororesin particles, non-fluororesin particles, and a cured resin. The fluororesin particles have an average particle diameter of from 0.01 to 0.3 ?m in a cross-sectional image of the surface layer as observed by a scanning electron microscope with a magnification of 5,000 times, and when the cross-sectional image is segmented into uniform regions each being 1 ?m×4 ?m, a standard deviation of areas each of which is occupied by the fluororesin particles and the non-fluororesin particles in each of the regions is 0.2 ?m2 or less.
    Type: Grant
    Filed: June 19, 2019
    Date of Patent: January 28, 2020
    Assignee: Ricoh Company, Ltd.
    Inventors: Hidetoshi Kami, Tomoharu Asano
  • Patent number: 10365569
    Abstract: The present invention provides: an electrophotographic photosensitive member which can achieve both of abrasion resistance and electrical characteristics; a production method of the electrophotographic photosensitive member; and a process cartridge and an electrophotographic apparatus having the electrophotographic photosensitive member. A surface layer of the electrophotographic photosensitive member includes a cured product and a specific amount of an alcohol or carboxylic acid having a specific structure, wherein the cured product is a polymerized product of a hole transporting compound having an acryloyloxy group or a methacryloyloxy group.
    Type: Grant
    Filed: August 3, 2018
    Date of Patent: July 30, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ryoichi Tokimitsu, Masaki Nonaka, Haruki Mori, Takahiro Mitsui
  • Patent number: 10338486
    Abstract: An average value of a hydrogen content ratio of a surface layer made of hydrogenated amorphous carbon is set to be 0.40 or less and a maximum value of an sp2 bonding ratio in an outermost surface region of the surface layer made of the hydrogenated amorphous carbon is set to be 0.50 or less.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: July 2, 2019
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Yukihiro Abe, Jun Ohira, Kazunari Ooyama, Takanori Ueno, Hironori Owaki, Yasuo Kojima
  • Patent number: 10331052
    Abstract: An electrophotographic photosensitive member includes a surface layer containing a charge transporting material and a polyester resin having a specific structure.
    Type: Grant
    Filed: December 14, 2017
    Date of Patent: June 25, 2019
    Assignee: Canon Kabushiki Kaisha
    Inventors: Kazunori Noguchi, Takeshi Murakami, Nobuhiro Nakamura, Atsushi Okuda, Harunobu Ogaki
  • Patent number: 10324386
    Abstract: An object of the present invention is achieved by an electrophotographic photoreceptor containing a conductive support sequentially laminated thereon with at least a photosensitive layer and a protective layer in that order, wherein the protective layer includes a cured composition having a radical polymerizable compound for a binder, a charge transport agent having a radical polymerizable functional group, and a photopolymerization initiator; the charge transport agent having a radical polymerizable functional group has a maximum absorption wavelength in the range of 405±50 nm; and the charge transport agent having a radical polymerizable functional group and the photopolymerization initiator satisfy Formula (A), ?G=Eox(D/D+)?Ered(A?/A)?E*??0.2 (eV).
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: June 18, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Toshiyuki Fujita, Haruo Horiguchi
  • Patent number: 10326336
    Abstract: Electronic devices are disclosed including hydrophobic or oleophobic coatings that control coolant flow therein or thereon. In at least one embodiment, an electric machine is provided including a stator core defining a cavity, windings disposed within the cavity and including end windings protruding from the cavity, and one or more layers of an oleophobic coating overlying the end windings and configured to control a flow of coolant over the end windings. A method may include applying one or more layers of a oleophobic coating to end windings of an electric machine stator such that the one or more layers control a flow of coolant over the end windings. The one or more layers may define coolant flow paths, which may direct coolant to areas of the electric machine requiring additional cooling, such as hot spots or neutral points.
    Type: Grant
    Filed: June 30, 2016
    Date of Patent: June 18, 2019
    Assignee: Ford Global Technologies, LLC
    Inventors: Myung Ki Sung, Edward Chan-Jiun Jih, Michael W. Degner
  • Patent number: 10317810
    Abstract: An improved organic photoconductor drum having a protective overcoat layer and method to make the same is provided. The protective overcoat layer is prepared from a curable composition including nano metal oxide particles sized less than 400 nm in combination with an urethane acrylate resin having at least 6 functional groups.
    Type: Grant
    Filed: November 3, 2017
    Date of Patent: June 11, 2019
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Weimei Luo, Mark Thomas Bellino
  • Patent number: 10289367
    Abstract: An image forming apparatus (1) includes a visible image forming unit (50), a display control unit (101) that causes the visible image forming unit (50) to form a visible image representing a display screen containing an image to be formed, an operation detection unit (54), a reception unit (104), and an image processing unit (105). The operation detection unit (54) detects a user's operation performed in the air, on the display screen displayed as the visible image by the visible image forming unit (50). The reception unit (104) identifies, when the user's operation detected by the operation detection unit (54) is a predetermined user's operation, a gradient to be applied to the image to be formed, according to the predetermined user's operation. The image processing unit (105) performs a perspective processing with respect to the image to be formed, according to the gradient identified by the reception unit (104).
    Type: Grant
    Filed: March 29, 2016
    Date of Patent: May 14, 2019
    Assignee: KYOCERA Document Solutions Inc.
    Inventor: Masayuki Tobinaga
  • Patent number: 10261430
    Abstract: An electrophotographic photoreceptor includes a conductive support, a photosensitive layer on the conductive support, and a protective layer on the photosensitive layer. The protective layer includes a binder resin, metal oxide particles, and fluororesin particles. The metal oxide particles include, on a surface thereof, a first surface-treating agent including fluorine atoms, and a second surface-treating agent including a polymerizable reactive group and a hydrophobic group. At least some of the metal oxide particles are supported on a surface of the fluororesin particles. The fluororesin particles are fixed to the binder resin via the at least some of the metal oxide particles supported on the surface of the fluororesin particles.
    Type: Grant
    Filed: January 11, 2017
    Date of Patent: April 16, 2019
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tomohito Chokan, Keiichi Ishikawa, Manabu Takezawa
  • Patent number: 10254665
    Abstract: A photoreceptor for electrophotography includes a photosensitive layer provided on a conductive substrate that contains at least a resin binder, a charge transport material, and an additive. The photoreceptor exhibits high photoresponsivity, stable electrical properties regardless of repeated use thereof, and high durability. The resin binder contains a polycarbonate resin composed of a copolymer having structural units expressed by general formulae (1) and (2) below. The charge transport material contains at least one type of stilbene compound expressed by general formulae (3), (4), and (5) below. The additive contains at least one type of diester compound expressed by general formula (6) below.
    Type: Grant
    Filed: September 2, 2014
    Date of Patent: April 9, 2019
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Quanqiu Zhang, Shinjiro Suzuki, Fengqiang Zhu, Masaru Takeuchi
  • Patent number: 10248053
    Abstract: A transfer assist member comprising a plurality of layers, one of the layers being a check film layer comprised of a hydroxyl terminated poly(oxetane) based fluorinated polyether.
    Type: Grant
    Filed: September 16, 2016
    Date of Patent: April 2, 2019
    Assignee: Xerox Corporation
    Inventors: Jin Wu, Lin Ma
  • Patent number: 10234776
    Abstract: An electrophotographic photoreceptor has a charge generating layer, a charge transporting layer, and an outermost surface layer laminated in this order on a conductive support, wherein the outermost surface layer contains composite structural particles obtained by coating inorganic particles with oxygen-deficient conductive tin oxide, and the composite structural particles have an L value of 80 to 95, and primary particles thereof have an average particle diameter of 35 to 200 nm.
    Type: Grant
    Filed: April 30, 2018
    Date of Patent: March 19, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Seisuke Maeda, Kazunori Kurimoto, Kazuhiro Kuramochi
  • Patent number: 10233283
    Abstract: A polycarbonate resin includes a repeat unit represented by Formula 1; a repeat unit represented by Formula 2; and a repeat unit represented by Formula 3, wherein the polycarbonate resin has a weight average molecular weight of about 15,000 g/mol to about 60,000 g/mol and a melt index of about 3 g/10 min to about 40 g/10 min.: wherein R1, R2, R3, R4, a, b, c, and d are the same as defined in the specification. The polycarbonate resin for film can exhibit excellent scratch resistance, elongation, chemical resistance and heat resistance, and can be used to prepare a film in roll form without any protective film.
    Type: Grant
    Filed: September 13, 2013
    Date of Patent: March 19, 2019
    Assignee: Lotte Advanced Materials Co., Ltd.
    Inventors: Jun Ho Chi, O Sung Kwon, Jong Chan Hur, Hyuck Man Kwon, Dong Geun Lee, Woo Suk Chei, Bok Nam Jang
  • Patent number: 10197929
    Abstract: The photoconductor includes a conductive support, a photosensitive layer, and a protective layer. The protective layer is a polymer of a radical-polymerizable composition containing a perfluoropolyether compound including a radical-polymerizable functional group, a radical-polymerizable monomer including a radical-polymerizable functional group, and an inorganic fine particle including a radical-polymerizable functional group. The radical-polymerizable functional group of the perfluoropolyether compound is different from the radical-polymerizable functional group of the radical-polymerizable monomer and identical to the radical-polymerizable functional group of the inorganic fine particle.
    Type: Grant
    Filed: December 6, 2017
    Date of Patent: February 5, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Masanori Yumita, Toyoko Shibata, Tomoko Sakimura
  • Patent number: 10175591
    Abstract: In an electrophotographic photoreceptor, an electric charge generating layer and an electric charge transport layer are laminated on a conductive support body in this order, a layer configuring an outermost surface of the electrophotographic photoreceptor contains composite structure particles in which a core material is inorganic particles, and the inorganic particles are coated with tin oxide doped with aluminum, and an average particle diameter of primary particles of the composite structure particles is 50 nm to 200 nm.
    Type: Grant
    Filed: November 21, 2017
    Date of Patent: January 8, 2019
    Assignee: KONICA MINOLTA, INC.
    Inventors: Seisuke Maeda, Kazunori Kurimoto, Kazuhiro Kuramochi
  • Patent number: 10133198
    Abstract: An electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer, wherein an outermost layer contains a compound having a structure represented by general formula (I) below: where R1 and R2 each independently represent a C1-12 alkyl group or a C5-12 cycloalkyl group; R3 represents a hydrogen atom, a halogen atom, a substituted or unsubstituted C1-6 alkyl group, a substituted or unsubstituted C1-6 alkoxyl group, a C6-20 aryl group or a heterocycle group; X and Z each represent a single bond or a C1-6 alkylene group which may be substituted; and Y represents a OCO group or COO group. A method for manufacturing the photoreceptor and an electrophotographic device including the photoreceptor are additionally provided. The electrophotographic photoreceptor provides sufficient stain resistance and is less affected by temperature and humidity environments while maintaining various advantageous characteristics of photoreceptors.
    Type: Grant
    Filed: June 2, 2017
    Date of Patent: November 20, 2018
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Fengqiang Zhu, Shinjiro Suzuki, Toshiki Takeuchi
  • Patent number: 10042273
    Abstract: In the electrophotographic photosensitive member of the present invention, a plurality of convex portions having a longest diameter L1 in the generatrix direction of the electrophotographic photosensitive member of 30 ?m or more arid a height H1 of 1 ?m or more are formed on the surface of the electrophotographic photosensitive member, a plurality of convex portions corresponding to the convex portions formed on the surface of the surface layer are formed at the interface between the surface layer and a layer immediately below the surface layer, and the rate of fitting of the convex portions formed on the surface of the surface layer to the convex portions formed at the interface between the surface layer and the layer immediately below the surface layer is 20% or more and 200% or less.
    Type: Grant
    Filed: July 30, 2015
    Date of Patent: August 7, 2018
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koji Takahashi, Hideki Ogawa, Yasuhiro Kawai, Naoaki Ichihashi, Wataru Kitamura
  • Patent number: 10031430
    Abstract: An electrophotographic photosensitive member including a surface layer containing a specific polyester resin is provided. The polyester resin contains specific structures.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: July 24, 2018
    Assignee: Canon Kabushiki Kaisha
    Inventors: Harunobu Ogaki, Kazunori Noguchi, Kazumichi Sugiyama
  • Patent number: 9971296
    Abstract: An image forming apparatus includes a photoreceptor, a charging unit, an exposing unit, a developing unit, a transfer unit, a lubricant supply unit, a cleaning unit and a lubricant removal unit. The lubricant supply unit supplies a lubricant to a surface of the photoreceptor and is disposed at a point which is an upstream side of the cleaning unit and a downstream side of the developing unit in a rotation direction of the photoreceptor. The lubricant removal unit removes the lubricant from the surface of the photoreceptor and is disposed at a point which is the downstream side of the cleaning unit and the upstream side of the developing unit in the rotation direction of the photoreceptor.
    Type: Grant
    Filed: April 14, 2016
    Date of Patent: May 15, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Takeshi Ishida, Hokuto Hatano
  • Patent number: 9964870
    Abstract: An electrophotographic photoreceptor includes at least a photosensitive layer and a protective layer sequentially layered on a conductive support, wherein the protective layer contains a cured product of a curable composition containing p-type semiconductor fine particles, an n-type organic semiconductor, and a polymerizable compound.
    Type: Grant
    Filed: March 3, 2017
    Date of Patent: May 8, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Masanori Yumita, Hirofumi Hayata
  • Patent number: 9964871
    Abstract: An electrophotographic photoreceptor includes: a conductive support; a photosensitive layer disposed on the conductive support; and a protective layer disposed on the photosensitive layer, wherein the protective layer is formed of a polymerized and cured product of a radically polymerizable composition containing a radically polymerizable monomer, a perfluoropolyether compound having a radically polymerizable group, and metal oxide fine particles having a radically polymerizable group.
    Type: Grant
    Filed: November 23, 2016
    Date of Patent: May 8, 2018
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tomoko Sakimura, Toyoko Shibata, Masanori Yumita
  • Patent number: 9946174
    Abstract: A conductive support for an electrophotographic photoreceptor includes a cylindrical member containing aluminum, wherein the cylindrical member has an arithmetic mean roughness Ra of 1.3 ?m or less, a maximum height of roughness profile Rz of 5.0 ?m or less, and a mean width of roughness profile elements RSm in an axial direction of 80 ?m to 400 ?m.
    Type: Grant
    Filed: August 15, 2016
    Date of Patent: April 17, 2018
    Assignee: FUJI XEROX CO., LTD.
    Inventors: Kenta Shingu, Masaru Agatsuma, Hiroshi Tamemasa, Daisuke Haruyama, Hiroaki Ogawa, Akihiko Nakamura, Shiori Okuda
  • Patent number: 9929369
    Abstract: The present invention provides a multi-photon-type organic electroluminescent element including a charge generation layer using a material that is difficult to be degraded even at around normal atmospheric pressure. In an organic electroluminescent element (10) including a pair of electrodes consisting of an anode (32) and a cathode (34), a plurality of light-emitting layers (50) provided between the electrodes, and a charge generation layer (70) provided between the light-emitting layers adjacent to each other, the charge generation layer contains an ionic polymer generating at least any one of an electron and a hole.
    Type: Grant
    Filed: July 28, 2011
    Date of Patent: March 27, 2018
    Assignee: SUMITOMO CHEMICAL COMPANY, LIMITED
    Inventor: Ki-Beom Kim
  • Patent number: 9823592
    Abstract: The present disclosure is drawn to apparatuses and methods that include a coated photoconductive substrate. The coated photoconductive substrate can include a photoconductive substrate with a charge generation layer and a charge transport layer, and can also have a coating adhered to the photoconductive substrate. The coating can have a thickness ranging from 1 nm to 200 nm.
    Type: Grant
    Filed: July 31, 2013
    Date of Patent: November 21, 2017
    Assignee: Hewlett-Packard Development Company, L.P.
    Inventors: Michael H. Lee, Krzysztof Nauka, Sivapackia Ganapathiappan, Omer Gila
  • Patent number: 9671706
    Abstract: An electrophotographic photoconductor including a support, an undercoat layer overlying the support, and a photosensitive layer overlying the undercoat layer is provided. The undercoat layer includes zinc oxide particles and a binder resin. The undercoat layer has a voltage (V)-current (I) characteristics such that, when S1 is a value obtained by integrating current (I [A]) in terms of voltage (V [V]) from 0 to a distribution voltage VUL [V] distributed to the undercoat layer, and S2 is a value obtained by integrating a line connecting two points at a voltage (V [V]) of 0 and the distribution voltage VUL [V] in terms of voltage (V [V]) from 0 to the distribution voltage VUL [V], S1 is within a range of from 1.0×10?4 to 1.0×10?2 and a ratio (S1/S2) of S1 to S2 is 0.50 or less.
    Type: Grant
    Filed: March 26, 2015
    Date of Patent: June 6, 2017
    Assignee: Ricoh Company, Ltd.
    Inventors: Daisuke Nii, Eiji Kurimoto, Tetsuro Suzuki, Tomoharu Asano, Toshihiro Ishida
  • Patent number: 9671705
    Abstract: An electrophotographic photoconductor includes a conductive support; and a photoconductive layer that contains at least a charge generation material, a hole transport material, an electron transport material and a binder resin, and that is provided on the conductive support, wherein the photoconductive layer has an outermost layer that contains a charge generation material, a hole transport material, an electron transport material, a binder resin and a highly branched polymer that is obtained by polymerizing, in the presence of a polymerization initiator, a monomer having, in a molecule, two or more radically polymerizable double bonds and a monomer having, in a molecule, a long-chain alkyl group or an alicyclic group and at least one radically polymerizable double bond. The electrophotographic photoconductor exhibits superior operational stability and stably high image quality, without problems with image memory, a contact member, or image defects due to cracks caused by contamination by oils/fats or sebum.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: June 6, 2017
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Seizo Kitagawa, Shinjiro Suzuki, Hiroshi Emori
  • Patent number: 9665019
    Abstract: An electrophotographic photoconductor includes a conductive support; a charge generation layer provided on the conductive support; and a charge transport layer containing a charge transport material, a binder resin, and a highly branched polymer having a long-chain alkyl group or an alicyclic group, provided on the charge generation layer as an outermost layer. The electrophotographic photoconductor has excellent contamination resistance against sebum or the like, stable electrical characteristics even upon repeated use, as well as superior transfer resistance and gas resistance. A method for producing the electrophotographic photoconductor is disclosed, as well as an electrophotographic apparatus including the electrophotographic photoconductor.
    Type: Grant
    Filed: August 10, 2015
    Date of Patent: May 30, 2017
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventors: Shinjiro Suzuki, Ikuo Takaki, Seizo Kitagawa, Hiroshi Emori
  • Patent number: 9594318
    Abstract: Provided is an electrophotographic photosensitive member, including: a support; and a photosensitive layer formed on the support, in which a surface layer of the electrophotographic photosensitive member contains a polymerized product of a compound represented by the following structural formula (1).
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: March 14, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Koichi Nakata, Shinji Takagi, Masaki Nonaka, Ryoichi Tokimitsu, Haruki Mori
  • Patent number: 9594317
    Abstract: An organic photoreceptor including a photosensitive layer disposed on an electrically conductive substrate; and a protective layer disposed on the photosensitive layer, wherein the protective layer includes a cured product of a multifunctional acrylic oligomer including a urethane group and a multifunctional curable compound including a dendrimeric structure.
    Type: Grant
    Filed: January 9, 2015
    Date of Patent: March 14, 2017
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Manabu Takezawa, Adachi Mami, Osamu Watanabe, Tomohito Chokan
  • Patent number: 9588447
    Abstract: A surface layer of the electrophotographic photosensitive member has a change region in which a ratio of the number of carbon atoms with respect to the sum of the number of silicon atoms and the number of carbon atoms gradually increases toward a surface side of the electrophotographic photosensitive member from a photoconductive layer side, wherein the change region has an upper charge injection prohibiting portion containing a Group 13 atom, and a surface-side portion which is positioned closer to the surface side of the electrophotographic photosensitive member than the upper charge injection prohibiting portion and does not contain the Group 13 atom, and the distribution of the Group 13 atom in a boundary portion between the surface-side portion and the upper charge injection prohibiting portion is precipitous.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: March 7, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toshiyasu Shirasuna, Yuu Nishimura
  • Patent number: 9575422
    Abstract: Provided are a method of producing an electrophotographic photosensitive member, particularly, a method of producing an electrophotographic photosensitive member and an organic device by which, in a method of forming a charge transporting layer, the stability of an application liquid for the layer after long-term storage is improved while the usage of an organic solvent in the application liquid is curtailed, and the layer having high uniformity is formed. The method is a method of producing an electrophotographic photosensitive member which includes a support and a charge transporting layer formed thereon, the method including: preparing a solution including: a first liquid whose solubility in water under 25° C. and 1 atmosphere is 1.0 mass % or less; a second liquid whose solubility in water under 25° C. and 1 atmosphere is 5.
    Type: Grant
    Filed: December 11, 2012
    Date of Patent: February 21, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Atsushi Okuda, Keiko Yamagishi, Harunobu Ogaki, Yohei Miyauchi, Hiroki Uematsu, Kimihiro Yoshimura
  • Patent number: 9557663
    Abstract: A surface layer of the electrophotographic photosensitive member has a change region in which a ratio of the number of carbon atoms with respect to the sum of the number of silicon atoms and the number of carbon atoms gradually increases toward a surface side of the electrophotographic photosensitive member from a photoconductive layer side, wherein the change region has an upper charge injection prohibiting portion containing a Group 13 atom, and a surface-side portion which is positioned closer to the surface side of the electrophotographic photosensitive member than the upper charge injection prohibiting portion and does not contain the Group 13 atom, and the distribution of the Group 13 atom in a boundary portion between the surface-side portion and the upper charge injection prohibiting portion is precipitous.
    Type: Grant
    Filed: June 15, 2015
    Date of Patent: January 31, 2017
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Toshiyasu Shirasuna, Yuu Nishimura
  • Patent number: 9528024
    Abstract: Disclosed is an energy curable coating composition for roll coating, a product, and continuous process of applying the energy curable coating composition to a substrate. The energy curable coating composition has a substantially constant viscosity and includes an energy curable resin having plurality of texturing particles suspended therein. The substantially constant viscosity of the energy curable coating composition remains at least less than about 1500 centipoise at approximately 15° C. to approximately 40° C., during recirculation, in a coating pan, and prior to application using a roll coating apparatus. The plurality of texturing particles provide a predetermined texture to a cured energy coating composition. The continuous process of applying the energy curable coating to a substrate allows the process to continuously operate until the energy curable coating composition is depleted from the container.
    Type: Grant
    Filed: July 22, 2015
    Date of Patent: December 27, 2016
    Assignee: AFI Licensing LLC
    Inventors: Dong Tian, Larry W. Leininger, Rebecca L. Winey
  • Patent number: 9505922
    Abstract: The present invention relates to self-coalescing latexes that incorporate film fat ing polymers that are low molecular weight polymers that are compatible with the latex and act as thin plasticizers penetrating through the remainder of the latex particle and aiding in the coalescence of the remaining polymers. In a preferred embodiment, the self-coalescing latex is a sequentially polymerized polymer having at least a core, a shell and a skin. The film forming polymers are formed of monomers substantially the same as the monomers of the shell but having average weighted molecular weights substantially less than the polymers of the shell. The present invention also relates to the method of polymerizing the self-coalescing latex of the current invention, which largely results from the addition of a substantial amount of chain transfer agent to a remaining portion, about 15% or less, of the monomer pre-emulsion prior to polymerization.
    Type: Grant
    Filed: May 15, 2012
    Date of Patent: November 29, 2016
    Assignee: Columbia Insurance Company
    Inventors: Hrire Gharapetian, Navin Tilara, Robert Sheerin
  • Patent number: 9477164
    Abstract: A surface layer of an electrophotographic photosensitive member contains a cured product of a composition containing a hole transporting substance having an acryloyloxy group and/or a methacryloyloxy group and a siloxane-modified acrylic compound.
    Type: Grant
    Filed: October 14, 2014
    Date of Patent: October 25, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shinji Takagi, Koichi Nakata
  • Patent number: 9436108
    Abstract: An electrophotographic photoreceptor includes an electrically conductive support, a photosensitive layer formed on the electrically conductive support and a surface layer formed on the photosensitive layer. The surface layer contains a resin produced by polymerizing a cross-linkable polymerizable compound, N-type semiconductor fine particles and P-type semiconductor fine particles.
    Type: Grant
    Filed: March 6, 2015
    Date of Patent: September 6, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Daisuke Kodama, Toshiyuki Fujita, Hirofumi Hayata
  • Patent number: 9417537
    Abstract: An overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a urethane resin having at least six radical polymerizable functional groups and a charge transport molecule having at least one radical polymerizable functional group. The amount of the urethane resin having at least six radical polymerizable functional groups in the curable composition is about 35 percent to about 65 percent by weight. The amount of the charge transport molecules having at least one radical polymerizable functional group in the curable composition is about 35 percent to about 65 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and extending its useful life.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: August 16, 2016
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Mark Thomas Bellino, David Glen Black, Weimei Luo, Scott Daniel Reeves
  • Patent number: 9417538
    Abstract: A method of preparing a photoconductor drum having an overcoat layer is provided. The photoconductor drum is used in an electrophotographic image forming device. The photoconductor drum is prepared from a curable composition including a urethane resin having at least six radical polymerizable functional groups and a charge transport molecule having at least one radical polymerizable functional group. The amount of the urethane resin having at least six radical polymerizable functional groups in the curable composition is about 35 percent to about 65 percent by weight. The amount of the charge transport molecules having at least one radical polymerizable functional group in the curable composition is about 35 percent to about 65 percent by weight. This overcoat layer improves wear resistance of the photoconductor drum without negatively altering the electrophotographic properties, thus protecting the photoconductor drum from damage and extending its useful life.
    Type: Grant
    Filed: December 15, 2014
    Date of Patent: August 16, 2016
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: Mark Thomas Bellino, David Glen Black, Weimei Luo, Scott Daniel Reeves
  • Patent number: 9360822
    Abstract: An improved overcoat layer for an organic photoconductor drum of an electrophotographic image forming device is provided. The overcoat layer is prepared from a curable composition including a triphenylamine charge transport containing two ethyl acrylate functional groups and a urethane resin containing six radical polymerizable functional groups. The amount of the triphenylamine charge transport containing two ethyl acrylate functional groups in the curable composition is about 20 to about 80 percent by weight. The amount of the urethane resin containing six radical polymerizable functional groups in the curable composition is about 20 to about 80 percent by weight. This overcoat layer improves wear resistance of the organic photoconductor drum without negatively altering the electrophotographic properties, thus protecting the organic photoconductor drum from damage and ultimately providing a photoconductor with a longer useful life when compared to other organic photoconductors commercially available.
    Type: Grant
    Filed: December 13, 2013
    Date of Patent: June 7, 2016
    Assignee: LEXMARK INTERNATIONAL, INC.
    Inventors: David Glenn Black, Mark Thomas Bellino, James Alan Hartman, Weimei Luo, Scott Daniel Reeves, Tanya Yvonne Thames
  • Patent number: 9348253
    Abstract: The present invention is an image-forming method in which, when ?(A) is the contact angle relative to water of a surface of a photosensitive member and ?(B) is the contact angle relative to water of a surface of an intermediate transfer member, ?(B) is from 100° to 150°; ?(A) and ?(B) satisfy ?70°??(A)??(B)<0°; the toner has a toner particle that contains a binder resin; and the contact angle relative to water of a surface of a pellet molding of the toner is from 60° to 80°.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: May 24, 2016
    Assignee: CANON KABUSHIKI KAISHA
    Inventors: Ichiro Kanno, Takeshi Hashimoto, Hideki Kaneko, Masayuki Hama, Nozomu Komatsu, Takakuni Kobori, Hiroyuki Fujikawa
  • Patent number: 9335712
    Abstract: A method applicable to an image forming apparatus with a lubricant to be applied to a surface of a photoreceptor for measuring surface roughness of the surface of the photoreceptor after lubricant application, the method including: a first step of measuring a surface profile of the photoreceptor and obtaining first data indicating the surface profile; a second step of generating second data on the basis of the first data, the second data indicating arithmetic mean roughness Ra within a predetermined range; and a third step of calculating a difference value ?Ra between second data before lubricant application and second data after lubricant application obtained by performing the first and second steps both before and after the lubricant is applied to the photoreceptor.
    Type: Grant
    Filed: March 24, 2014
    Date of Patent: May 10, 2016
    Assignee: KONICA MINOLTA, INC.
    Inventors: Tomohisa Yoshida, Tsugihito Yoshiyama, Yoshiki Nakane, Yohei Ito, Masanori Kawada
  • Patent number: 9323151
    Abstract: A photosensitive oligomer for photosensitive resist comprising unsaturated double-bond group and flexible group. The monomers or compounds for synthesizing the photosensitive oligomer include unsaturated double-bond containing organic acid-based monomers, unsaturated double-bond containing organic ester-based monomers, unsaturated double-bond containing organic acid chloride/ethylene-based monomers, unsaturated double-bond containing alcohol-based compounds, and flexible group-containing silane/ether-based compounds. The present invention further provides a negative photosensitive resist resin composition comprising the photosensitive oligomer.
    Type: Grant
    Filed: June 3, 2013
    Date of Patent: April 26, 2016
    Assignee: BOE TECHNOLOGY GROUP CO., LTD.
    Inventors: Wenwen Sun, Zhuo Zhang
  • Patent number: 9250546
    Abstract: A member for electrophotography having a multilayer structure or a single-layer structure, including an outermost layer which satisfies the following A, B and C: A: the outermost layer has perfluoropolyether and a binder resin, and in the outermost layer, the ratio of the number of fluorine atoms to the number of carbon atoms is 0.10 or more and 0.40 or less; B: in a 19F-NMR spectrum of the outermost layer, the relaxation time T2 of a peak derived from CF2 moieties of perfluoropolyether is 13 milliseconds or more at 22° C.; and C: the total sum of the contents of CF3 moieties, CF2 moieties, and CF moieties in the binder resin is 5% by mass or less.
    Type: Grant
    Filed: June 24, 2014
    Date of Patent: February 2, 2016
    Assignee: Canon Kabushiki Kaisha
    Inventors: Naoto Kameyama, Kenji Onuma, Rieko Sakamoto, Yasushi Shimizu, Koichi Sato, Kimihiro Yoshimura, Akira Watanabe, Maho Tanaka, Shigeki Takishita, Hiroshi Tominaga, Keiji Karube, Takenori Sueoka