Patents by Inventor Yutaka Takahashi

Yutaka Takahashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 7272354
    Abstract: A cleaning unit includes a first blade and a second blade. The first blade is in contact with an image carrier or a paper carrier and removes adhered substances remained on surface of these. The second blade has an abrasive layer that is formed by including abrasive particles in an elastic material and is disposed in the downstream side of the first blade. The second blade is allowed to be in contact with the image carrier 1 or the paper carrier. Volume occupancy of abrasive particles in an area of contact of the second blade with either the image carrier or the paper carrier is not less than 50 percent and not more than 90 percent.
    Type: Grant
    Filed: May 26, 2006
    Date of Patent: September 18, 2007
    Assignee: Ricoh Company, Ltd.
    Inventors: Eisaku Murakami, Masami Tomita, Masanori Kawasumi, Toshio Koike, Naohiro Kumagai, Atsushi Sampe, Takeshi Shintani, Masato Yanagida, Yutaka Takahashi, Hiroya Hirose, Shin Hasegawa, Hiroyuki Nagashima, Takeshi Uchitani, Kazunori Karasawa, Kentaroh Matsumoto, Tokuya Ohjimi, Mugijiroh Uno
  • Publication number: 20070183824
    Abstract: In an image forming apparatus, an area applied with a lubricant, i.e., an area of a lubricant layer having a uniform thickness, is obtained by spreading the lubricant by a lubricant smoothing blade. The area applied with a lubricant covers an area cleaned by a cleaning blade, i.e., a contact portion of the cleaning blade with a photoconductor.
    Type: Application
    Filed: December 6, 2005
    Publication date: August 9, 2007
    Inventors: Takeo Suda, Shinichi Kawahara, Takatsugu Fujishiro, Tokuya Ojimi, Takeshi Tabuchi, Masato Yanagida, Haruji Mizuishi, Teruyuki Kasuga, Hiroomi Harada, Shuji Tanaka, Takaaki Tawada, Hiroshi Ono, Ken Amemiya, Toshio Koike, Yuji Arai, Masanori Kawasumi, Takuzi Yoneda, Masami Tomita, Yutaka Takahashi, Yoshio Hattori, Keiichi Yoshida
  • Publication number: 20070148054
    Abstract: An organic synthesis microreactor mixes fluids in a very narrow space and causes the fluids to react in multiple stages. The reactor consists of an introduction portion and a reaction portion disconnectably connected. The introduction portion introduces reagents from channels and, if necessary, mixes and reacts the reagents. The reaction portion accepts a reagent or reaction liquid from the introduction portion and mixes and reacts the reagent or reaction liquid with other reagent.
    Type: Application
    Filed: November 22, 2006
    Publication date: June 28, 2007
    Applicants: JEOL Ltd., Kanagawa Academy of Science and Technology
    Inventors: Yutaka Takahashi, Takehiko Kitamori
  • Publication number: 20070122164
    Abstract: In an image forming system, a lifetime management device calculates remaining lifetime of process units, a transfer unit, a secondary transfer unit, a belt cleaning unit and a fixing unit mounted on an image forming apparatus based on an operation amount thereof and a predetermined lifetime index. Based on the remaining lifetime and a predetermined replacement index, the lifetime management device determines whether any unit needs to be replaced, and, if any, transmits a replacement request signal to an external information processor together with a signal indicating remaining lifetime of other units via a communication line.
    Type: Application
    Filed: November 22, 2006
    Publication date: May 31, 2007
    Inventors: Jun Shiori, Toshihiro Sugiyama, Yutaka Takahashi
  • Publication number: 20070122166
    Abstract: Process units, a transfer unit, a belt cleaning unit, a secondary transfer unit and a fixing unit each include a storage unit that stores therein information on the operation amount thereof measured by a controller as operation record with respect to each unit. The controller updates the information stored in the storage unit after each time the controller measures the operation amount. The controller calculates remaining lifetime of the units based on the operation amount and a predetermined lifetime index.
    Type: Application
    Filed: November 14, 2006
    Publication date: May 31, 2007
    Inventors: Yutaka Takahashi, Toshihiro Sugiyama, Jun Shiori
  • Publication number: 20070122167
    Abstract: An image forming system includes an image forming apparatus that includes process units for different colors and a lifetime management device that manages lifetime information on each unit of the image forming apparatus. The lifetime management device counts the number of prints produced by the image forming apparatus with respect to each of photoconductor units and developing units in the process units, and measures an operation amount unique to the respective units. Based on the number of prints, service life of each unit and operation amount, the lifetime management device calculates the remaining lifetime of each unit.
    Type: Application
    Filed: November 14, 2006
    Publication date: May 31, 2007
    Inventors: Toshihiro Sugiyama, Yutaka Takahashi, Jun Shiori
  • Patent number: 7211295
    Abstract: Disclosed herein is a silicon dioxide film forming method including: a reaction chamber heating step of heating a reaction chamber to a predetermined temperature, the reaction chamber containing an object to be processed; a gas pretreating step of energizing a process gas to produce water, the process gas including hydrogen, chlorine, and oxygen gas; and a film forming step of forming a silicon dioxide film by supplying the the process gas that has been energized to produce water into the heated reaction chamber to oxidize the silicon layer of the object to be processed.
    Type: Grant
    Filed: April 23, 2004
    Date of Patent: May 1, 2007
    Assignee: Tokyo Electron Limited
    Inventors: Yutaka Takahashi, Hitoshi Kato, Katsutoshi Ishii, Kazutoshi Miura
  • Publication number: 20070059067
    Abstract: A process cartridge including an image bearing member; a lubricant applicator, which includes a lubricant application member configured to apply a solid lubricant to the surface of the image bearing member; and a smoothing member configured to smooth the applied solid lubricant, and at least one of a charging device, a developing device and a cleaning device, wherein the amount of the solid lubricant present on a portion of surface of the image bearing member, which is located between the lubricant application member and the smoothing blade, is from 0.11 to 1.2 mg/m2. The smoothing member is preferably a blade having a JIS-A hardness of not less than 79°. The process cartridge is preferably assembled by a method including setting the lubricant smoothing member, the lubricant and the lubricant application member to a housing of the process cartridge; and then setting the image bearing member to the housing.
    Type: Application
    Filed: September 13, 2006
    Publication date: March 15, 2007
    Inventors: Shuji Tanaka, Shinichi Kawahara, Yoshiyuki Kimura, Hiroshi Hosokawa, Yoshio Hattori, Takeo Suda, Yutaka Takahashi, Takatsugu Fujishiro, Teruyuki Kasuga, Hiroomi Harada, Tokuya Ojimi, Masato Yanagida, Takaaki Tawada, Takeshi Tabuchi, Naohiro Kumagai, Chohtaroh Kataoka, Hidemasa Sato
  • Publication number: 20070036595
    Abstract: A cleaning unit includes a cleaning blade that cleans toner on an image carrier and a brush-shaped roller that applies a lubricant of a molded lubricant on the image carrier. The brush-shaped roller is insulative, and delivers the toner cleaned by the cleaning blade to inside of the cleaning unit.
    Type: Application
    Filed: October 25, 2006
    Publication date: February 15, 2007
    Inventors: Ken Amemiya, Masato Yanagida, Naohiro Kumagai, Takeshi Shintani, Takaaki Tawada, Yuji Arai, Toshio Koike, Takuji Yoneda, Takeshi Tabuchi, Yutaka Takahashi, Eisaku Murakami, Takeshi Uchitani, Masami Tomita, Masanori Kawasumi
  • Patent number: 7162187
    Abstract: In an image forming apparatus, a toner image is formed on a photosensitive element and a transfer roller, which carries a transfer medium, is pressed against a photosensitive element at a pressure of from 20.4 N/cm2 to 200 N/cm2.
    Type: Grant
    Filed: June 30, 2004
    Date of Patent: January 9, 2007
    Assignee: Ricoh Company, Ltd.
    Inventors: Yasushi Koichi, Mitsuo Aoki, Bing Shu, Setsuo Soga, Koji Suzuki, Yutaka Takahashi, Tadashi Kasai
  • Patent number: 7150954
    Abstract: An image forming method, comprising passing a toner image-bearing sheet through a nip defined between two rollers including a heater roller to fix the toner image on the sheet, wherein the toner image is formed from a toner comprising a binder resin, and a colorant, wherein the toner image before the passage through the nip has a toner volume V1 and a toner image area S1, wherein the toner image after the passage through the nip has a toner volume V2 and a toner image area S2, and wherein a volume change Vt and an area change St defined by the formulas shown below are 30% or less and 20% or less, respectively: Vt(%)=(V1?V2)/V1×100 St(%)=(S2?S1)/S1×100. Alternatively, the toner image before the passage through the nip has a surface roughness of 2.5 ?m or less.
    Type: Grant
    Filed: December 3, 2004
    Date of Patent: December 19, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Mitsuo Aoki, Kumi Hasegawa, Toshiaki Higaya, Yasushi Koichi, Yutaka Takahashi, Tadashi Kasai
  • Patent number: 7149465
    Abstract: A cleaning unit includes a cleaning blade that cleans toner on an image carrier and a brush-shaped roller that applies a lubricant of a molded lubricant on the image carrier. The brush-shaped roller is insulative, and delivers the toner cleaned by the cleaning blade to inside of the cleaning unit.
    Type: Grant
    Filed: August 20, 2004
    Date of Patent: December 12, 2006
    Assignee: Ricoh Company, Limited
    Inventors: Ken Amemiya, Masato Yanagida, Naohiro Kumagai, Takeshi Shintani, Takaaki Tawada, Yuji Arai, Toshio Koike, Takuji Yoneda, Takeshi Tabuchi, Yutaka Takahashi, Eisaku Murakami, Takeshi Uchitani, Masami Tomita, Masanori Kawasumi
  • Publication number: 20060275688
    Abstract: An electrophotographic image forming apparatus capable of reliably forming an image with density gradation, one which does not have a low-quality appearance. The estimated average halftone granularity of the toner image after developing but before electrostatic transfer was set at 0.25 or less. The average halftone granularity was found by measuring the granularity of a toner image at locations of different average brightness by means of newly proposed formula, and averaging the measured values for which the average brightness is 40 to 80. The estimated average halftone granularity was obtained by estimating the average halftone granularity of the toner image on a photoreceptor by means of a newly proposed method.
    Type: Application
    Filed: August 14, 2006
    Publication date: December 7, 2006
    Inventors: Koji Suzuki, Mitsuo Aoki, Bing Shu, Yasushi Koichi, Setsuo Soga, Tadashi Kasai, Yutaka Takahashi
  • Publication number: 20060276051
    Abstract: An oxidation method is capable of forming oxide films in an improved interfilm thickness uniformity. The oxidation method includes the steps of supplying an oxidizing gas and a reducing gas into a processing vessel 22 capable of being evacuated and holding a plurality of workpieces W arranged at predetermined pitches, and creating a process atmosphere containing active oxygen species and active hydroxyl species in the processing vessel 22 through the interaction of the oxidizing gas-and the reducing gas. At least either of the oxidizing gas and the reducing gas is jetted into an upstream region S1, a middle region S2 and a downstream region S3, with respect to the flowing direction of the gas, of a processing space S containing the workpieces W.
    Type: Application
    Filed: August 11, 2006
    Publication date: December 7, 2006
    Inventors: Kazuhide Hasebe, Kota Umezawa, Yutaka Takahashi
  • Publication number: 20060269335
    Abstract: An image forming apparatus including an image bearing member; a charger for charging the image bearing member; a light irradiating device for irradiating the charged image bearing member to form an electrostatic image; a developing device for developing the electrostatic image to form a toner image; a primary transfer device for transferring the toner image to an intermediate transfer medium; a secondary transfer device for transferring the toner image to a receiver; a first cleaning device for cleaning the image bearing member; a second cleaning device for cleaning the intermediate transfer medium; a first lubricant applicator for applying a first lubricant to the image bearing member; and a second lubricant applicator for applying a second lubricant to the intermediate transfer medium such that the surface has a second static friction coefficient higher than the first static friction coefficient.
    Type: Application
    Filed: May 5, 2006
    Publication date: November 30, 2006
    Inventor: Yutaka Takahashi
  • Patent number: 7129186
    Abstract: An oxidation method is capable of forming oxide films in an improved interfilm thickness uniformity. The oxidation method includes the steps of supplying an oxidizing gas and a reducing gas into a processing vessel 22 capable of being evacuated and holding a plurality of workpieces W arranged at predetermined pitches, and creating a process atmosphere containing active oxygen species and active hydroxyl species in the processing vessel 22 through the interaction of the oxidizing gas and the reducing gas. At least either of the oxidizing gas and the reducing gas is jetted into an upstream region S1, a middle region S2 and a downstream region S3, with respect to the flowing direction of the gas, of a processing space S containing the workpieces W.
    Type: Grant
    Filed: November 19, 2004
    Date of Patent: October 31, 2006
    Assignee: Tokyo Electron Limited
    Inventors: Kazuhide Hasebe, Kota Umezawa, Yutaka Takahashi
  • Patent number: 7125638
    Abstract: An electrophotographic image forming apparatus capable of reliably forming an image with density gradation, one which does not have a low-quality appearance. The estimated average halftone granularity of the toner image after developing but before electrostatic transfer was set at 0.25 or less. The average halftone granularity was found by measuring the granularity of a toner image at locations of different average brightness by means of newly proposed formula, and averaging the measured values for which the average brightness is 40 to 80. The estimated average halftone granularity was obtained by estimating the average halftone granularity of the toner image on a photoreceptor by means of a newly proposed method.
    Type: Grant
    Filed: March 23, 2004
    Date of Patent: October 24, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Koji Suzuki, Mitsuo Aoki, Bing Shu, Yasushi Koichi, Setsuo Soga, Tadashi Kasai, Yutaka Takahashi
  • Publication number: 20060216085
    Abstract: A cleaning unit includes a first blade and a second blade. The first blade is in contact with an image carrier or a paper carrier and removes adhered substances remained on surface of these. The second blade has an abrasive layer that is formed by including abrasive particles in an elastic material and is disposed in the downstream side of the first blade. The second blade is allowed to be in contact with the image carrier 1 or the paper carrier. Volume occupancy of abrasive particles in an area of contact of the second blade with either the image carrier or the paper carrier is not less than 50 percent and not more than 90 percent.
    Type: Application
    Filed: May 26, 2006
    Publication date: September 28, 2006
    Inventors: Eisaku Murakami, Masami Tomita, Masanori Kawasumi, Toshio Koike, Naohiro Kumagai, Atsushi Sampe, Takeshi Shintani, Masato Yanagida, Yutaka Takahashi, Hiroya Hirose, Shin Hasegawa, Hiroyuki Nagashima, Takeshi Uchitani, Kazunori Karasawa, Kentaroh Matsumoto, Tokuya Ohjimi, Mugijiroh Uno
  • Patent number: 7110696
    Abstract: A cleaning unit includes a first blade and a second blade. The first blade is in contact with an image carrier or a paper carrier and removes adhered substances remained on surface of these. The second blade has an abrasive layer that is formed by including abrasive particles in an elastic material and is disposed in the downstream side of the first blade. The second blade is allowed to be in contact with the image carrier 1 or the paper carrier. Volume occupancy of abrasive particles in an area of contact of the second blade with either the image carrier or the paper carrier is not less than 50 percent and not more than 90 percent.
    Type: Grant
    Filed: September 24, 2003
    Date of Patent: September 19, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Eisaku Murakami, Masami Tomita, Masanori Kawasumi, Toshio Koike, Naohiro Kumagai, Atsushi Sampe, Takeshi Shintani, Masato Yanagida, Yutaka Takahashi, Hiroya Hirose, Shin Hasegawa, Hiroyuki Nagashima, Takeshi Uchitani, Kazunori Karasawa, Kentaroh Matsumoto, Tokuya Ohjimi, Mugijiroh Uno
  • Patent number: 7064504
    Abstract: A control apparatus for a brushless DC motor that rotatably drives the brushless DC motor including a rotor having a permanent magnet, and a stator having stator windings of a plurality of phases that generate a rotating magnetic field for rotating the rotor, by a current passage switching device constituted by a plurality of switching elements and performing successive commutation of current to the stator windings. The control apparatus includes: an angular error calculation device for calculating a sine value and a cosine value of an angular difference between an estimated rotation angle with respect to the rotation angle of the rotor and an actual rotation angle, based on a line voltage that is a difference between phase voltages of the plurality of phases on an input side of the stator winding and phase currents of the plurality of phases; and an observer for calculating the rotation angle of the rotor based on the sine value and the cosine value of the angular difference.
    Type: Grant
    Filed: May 17, 2004
    Date of Patent: June 20, 2006
    Assignee: Honda Motor Co., Ltd.
    Inventors: Nobuyuki Imai, Yutaka Takahashi, Masato Miyauchi