Patents by Inventor Hirokazu Nakamura
Hirokazu Nakamura 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).
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Publication number: 20110076072Abstract: In one embodiment, in a fixing apparatus that is provided with a plurality of rollers including a fixing roller, and an endless fixing belt that is wound around the plurality of rollers, a regulation belt for regulating movement of the fixing belt in the axial direction is wound around at least one of both sides in the axial direction of at least one roller (for example, two rollers) among the plurality of rollers.Type: ApplicationFiled: September 24, 2010Publication date: March 31, 2011Inventors: Masaki AMEMIYA, Takashi YAMANAKA, Masaya ASAKAWA, Hirokazu NAKAMURA, Noriko INOUE
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Publication number: 20110026986Abstract: An embodiment of the present invention includes a fixing member; a pressure member for pressing against the fixing member so as to form a nip region between the pressure member and the fixing member; a pressure cancellation unit for pressing the pressure member against the fixing member and for cancelling the state in which the pressure member is pressed against the fixing member; a paper detachment member for detaching paper held between the fixing member and the pressure member in the nip region from the pressure member; and a separation mechanism for cleaning the paper detachment member by separating the paper detachment member from the pressure member in conjunction with a pressure cancellation operation of the pressure cancellation unit.Type: ApplicationFiled: July 21, 2010Publication date: February 3, 2011Inventors: Takashi Yamanaka, Masaya Asakawa, Hirokazu Nakamura, Noriko Inoue, Masaki Amemiya
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Publication number: 20100046995Abstract: A fixing apparatus 12 in one embodiment of the present invention includes a fixing roller 31, a pressure roller 32, a pressing apparatus 100 for pressing the pressure roller 32 toward the fixing roller 31, a pressure cancellation apparatus 200 that cancels pressure applied by the pressing apparatus 100 to the pressure roller 32 against the fixing roller 31, an external heating apparatus 300 that presses the fixing roller 31 from the outside on an opposite side to the pressure roller 32, and a regulation member 400 that regulates the amount of pressure the external heating apparatus 300 applies to the fixing roller 31.Type: ApplicationFiled: August 13, 2009Publication date: February 25, 2010Inventors: Hirokazu NAKAMURA, Kousuke Namisaki, Takashi Yamanaka, Kimihide Tsukamoto
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Publication number: 20090324307Abstract: In one embodiment, when a hot roller is driven to rotate, a driving gear rotates so that a swing gear and a swing cam rotate. Then, a sliding contact edge on the right side of a swing lever that abuts against the circumferential face of the swing cam repeatedly moves up and down, and the swing lever repeatedly rotates clockwise and counterclockwise with a shaft of a pressure release cam as the center. At this time, since only the clockwise rotation of the swing lever is transmitted via a one-way clutch to the shaft of the pressure release cam, the clockwise rotation is intermittently transmitted to the shaft of the pressure release cam. As a result of this, the pressure release cam intermittently rotates clockwise, and the pressure release cam pushes away a roller of a displacement frame, so that the pressure roller separates from the hot roller.Type: ApplicationFiled: June 18, 2009Publication date: December 31, 2009Inventors: Kimihide Tsukamoto, Hirokazu Nakamura, Takashi Yamanaka, Kousuke Namisaki
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Patent number: 7628490Abstract: A binocular slit lamp microscope for observing a patient's eye, comprises: an objective lens; binocular eyepieces; and a mechanism that includes a plurality of optical systems and is arranged to switch the optical systems to be selectively placed in a predetermined position between the objective lens and the binocular eyepieces on an observation optical path, the mechanism including a variable magnification optical system for changing observation magnification and a viewing angle changing optical system for changing a viewing angle between a right viewing path and a left viewing path.Type: GrantFiled: September 24, 2007Date of Patent: December 8, 2009Assignee: Nidek Co., Ltd.Inventor: Hirokazu Nakamura
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Patent number: 7610754Abstract: In a hydraulic unit (A) including a hydraulic pump configured to be driven by a motor (2) and a hydraulic cylinder (3) for actuating a chuck, a fixed displacement hydraulic pump is combined with an adjustable speed motor (2) for driving the pump. In order to concurrently provide rapid movement of the cylinder (3) and reduction in the surge pressure, upon the cylinder (3) actuating the chuck, after a teaching movement is imparted to the cylinder (3) to determine an operating stroke of the cylinder (3) based on the number of rotations of the motor (2), the motor (2) is rotated at a high rotational speed for movement until a preset deceleration start point short of the end of movement of the cylinder (3) within the determined operating stroke and then rotated at a low rotational speed for deceleration from the deceleration start point to the end of movement of the cylinder (3), thereby allowing the chuck to chuck a work with a soft touch.Type: GrantFiled: January 19, 2006Date of Patent: November 3, 2009Assignee: Daikin Industries, Ltd.Inventors: Yoshiyuki Ochi, Yoshimitsu Otani, Hirokazu Nakamura
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Publication number: 20080079901Abstract: A binocular slit lamp microscope for observing a patient's eye, comprises: an objective lens; binocular eyepieces; and a mechanism that includes a plurality of optical systems and is arranged to switch the optical systems to be selectively placed in a predetermined position between the objective lens and the binocular eyepieces on an observation optical path, the mechanism including a variable magnification optical system for changing observation magnification and a viewing angle changing optical system for changing a viewing angle between a right viewing path and a left viewing path.Type: ApplicationFiled: September 24, 2007Publication date: April 3, 2008Applicant: NIDEK CO., LTD.Inventor: Hirokazu Nakamura
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Patent number: 7331662Abstract: An ink cartridge includes an ink containing section including an ink absorbing body made of a porous material for retaining ink. The ink cartridge satisfies 200?N·R?320, where N is the cell density, expressed in the number of pores per inch, of the ink absorbing body before the ink absorbing body is contained in the ink containing section; and R is a compressibility, which is a volume ratio of the ink absorbing body when the ink absorbing body is contained in a compressed state in the ink containing section to the ink absorbing body before the ink absorbing body is contained in the ink containing section.Type: GrantFiled: September 13, 2005Date of Patent: February 19, 2008Assignee: Sharp Kabushiki KaishaInventors: Masaki Matsushita, Hirokazu Nakamura, Naozumi Ueno, Hisashi Yoshimura, Takashi Goto, Hiroshi Ishii
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Publication number: 20080034956Abstract: In a hydraulic unit (A) including a hydraulic pump configured to be driven by a motor (2) and a hydraulic cylinder (3) for actuating a chuck, a fixed displacement hydraulic pump is combined with an adjustable speed motor (2) for driving the pump. In order to concurrently provide rapid movement of the cylinder (3) and reduction in the surge pressure, upon the cylinder (3) actuating the chuck, after a teaching movement is imparted to the cylinder (3) to determine an operating stroke of the cylinder (3) based on the number of rotations of the motor (2), the motor (2) is rotated at a high rotational speed for movement until a preset deceleration start point short of the end of movement of the cylinder (3) within the determined operating stroke and then rotated at a low rotational speed for deceleration from the deceleration start point to the end of movement of the cylinder (3), thereby allowing the chuck to chuck a work with a soft touch.Type: ApplicationFiled: January 19, 2006Publication date: February 14, 2008Inventors: Yoshiyuki Ochi, Yoshimitsu Otani, Hirokazu Nakamura
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Patent number: 7304440Abstract: An electron emitting apparatus includes a lower electrode, an emitter section made of a dielectric material, a plurality of upper electrodes having micro through holes, and a collector electrode opposing the upper electrodes. In this electron-emitting apparatus, electrons are accumulated in the emitter section by controlling the potential difference (drive voltage) between the lower and upper electrodes with respect to the potential of the lower electrode to a negative predetermined voltage. At this time, the collector electrode of the electron-emitting apparatus is grounded. Thus, unnecessary electron-emitting is suppressed. Subsequently, the drive voltage is changed to a positive predetermined voltage. As a result, polarization reversal occurs in the emitter section, and accumulated electros are emitted through the micro through holes in the upper electrodes by Coulomb repulsion. At this time, a positive voltage Vc is applied to the collector electrode to give large energy to accelerate the electrons.Type: GrantFiled: September 27, 2005Date of Patent: December 4, 2007Assignee: NGK Insulators, Ltd.Inventors: Iwao Ohwada, Takayoshi Akao, Tetsuyuki Kameji, Hirokazu Nakamura
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Patent number: 7229435Abstract: An ophthalmic laser treatment apparatus which irradiates a laser beam to a patient's eye to be treated is disclosed. The apparatus includes: a first optical fiber which delivers a first laser beam emitted from a first laser source; a first light delivery optical system which forms an image of an emission end surface of the first optical fiber on the affected part of the eye in a predetermined first spot size being in a range of 50 ?m to 1000 ?m; a second optical fiber which delivers a second laser beam emitted from a second laser source; and a second light delivery optical system which forms an image of an emission end surface of the second optical fiber on the affected part of the eye in a predetermined second spot size in a range of 500 ?m to 7000 ?m.Type: GrantFiled: April 24, 2002Date of Patent: June 12, 2007Assignee: Nidek Co., Ltd.Inventor: Hirokazu Nakamura
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Patent number: 7226152Abstract: An image forming apparatus in which ink depletion detection accuracy will not be deteriorated even if an air bubble is created in an ink supplying path. The image forming apparatus is provided with (a) an ink storage section for storing ink therein, (b) an ink supplying path for supplying, to a print head, the ink stored in the ink storage section, and (c) an electrode for detecting whether the ink is present or absent in the ink supplying path, an amount of the ink supplied into the ink supplying path being 1.0 cc or less per minute.Type: GrantFiled: January 27, 2004Date of Patent: June 5, 2007Assignee: Sharp Kabushiki KaishaInventors: Masaki Matsushita, Hirokazu Nakamura, Naozumi Ueno, Hisashi Yoshimura, Takashi Gotoh, Hiroshi Ishii
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Patent number: 7221896Abstract: A fixing device of the present invention includes a pressure roller and a peeling roller both of which press a heat roller. The pressure roller is disposed upstream to the peeling roller in a transport direction of a recording paper. An outer diameter of the heat roller, an outer diameter of the pressure roller, and an outer diameter of the peeling roller decrease in this order. With this arrangement, it is possible to realize a fixing device which achieves a reduced size and reduced power requirements, while ensuring a fixing property and a peeling property with respect to a recording medium.Type: GrantFiled: December 7, 2004Date of Patent: May 22, 2007Assignee: Sharp Kabushiki KaishaInventors: Hisashi Yoshimura, Hirokazu Nakamura, Masaki Matsushita, Hirokazu Fujita, Naozumi Ueno
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Patent number: 7156509Abstract: An image forming apparatus includes an ink tank; and an ink supplying path for supplying the ink from the ink tank to a print head, wherein the ink supplying path therein includes a filter, which generates negative pressure when the ink is supplied, the negative pressure being smaller than ink absorbing pressure of a nozzle of the print head. Further, the ink tank therein includes, for example, a porous ink absorbing body for retaining ink.Type: GrantFiled: January 28, 2004Date of Patent: January 2, 2007Assignee: Sharp Kabushiki KaishaInventors: Masaki Matsushita, Hirokazu Nakamura, Naozumi Ueno, Hisashi Yoshimura, Takashi Gotoh, Akio Matsumoto, Hiroshi Ishii
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Patent number: 7134748Abstract: The present invention can reduce the amount of ink in an outlet-side space which is sucked together with gas, without making the thickness of an isolating member for separating the inside of the sub-tank into an inlet-side space and the outlet-side space in the horizontal direction extremely thin nor making an inflow channel for allowing the ink in the inlet-side space to flow into the outlet-side space extremely small. The present invention has an isolating member in the form of a plate for separating the inside of a sub-tank coupled to a recording head into an inlet-side space connected to a main-tank and an outlet-side space connected to the recording head, and an inflow channel in the form of a slit for increasing the ink level in the inlet-side space while allowing the ink in the inlet-side space to flow into the outlet-side space from the isolating member.Type: GrantFiled: December 9, 2003Date of Patent: November 14, 2006Assignee: Sharp Kabushiki KaishaInventors: Hirokazu Nakamura, Hisashi Yoshimura, Takashi Goto, Naozumi Ueno, Masaki Matsushita, Hiroshi Ishii
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Publication number: 20060238581Abstract: An ink supply device includes an ink tank for containing ink inside and a tank holder for holding the ink tank in a detachable manner. The tank holder includes a control tank, a circulation needle, and an air supply needle. The control tank allows the ink and air to circulate between the control tank and the ink tank so that the internal pressure of the ink tank attached has a predetermined value.Type: ApplicationFiled: March 23, 2004Publication date: October 26, 2006Inventors: Hisashi Yoshimura, Naozumi Ueno, Hirokazu Nakamura
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Publication number: 20060192213Abstract: A light-emitting device includes electron emitters for planarly emitting electrons, collector electrodes disposed to face corresponding one electron emitter, and a phosphor formed near the collector electrodes. During a period when electrons are emitted from the electron emitter, a collector voltage is applied to each of the collector electrodes in the sequence. Electrons are attracted toward a region of the phosphor in the vicinity of the collector electrode to which the collector voltage is applied, and impinge on the region of the phosphor, whereby light is emitted therefrom. The remaining region of the phosphor emit afterglow.Type: ApplicationFiled: February 23, 2006Publication date: August 31, 2006Applicant: NGK Insulators, Ltd.Inventors: Iwao Ohwada, Tetsuyuki Kameji, Hirokazu Nakamura
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Patent number: 7066582Abstract: An organic insulating coating formed on a substrate is composed of two layers of a first parylene coating and a second parylene coating. Heat treatment is performed to at least the first parylene coating after being formed, at a temperature below 125° C. for two hours. Then the second parylene coating is formed on the first parylene coating. Occurrence of pinholes is thus prevented at least in one of the two layers of the organic coatings, with the result that insulating properties of the coatings are improved.Type: GrantFiled: August 8, 2003Date of Patent: June 27, 2006Assignee: Sharp Kabushiki KaishaInventors: Haruhiko Deguchi, Shigeaki Kakiwaki, Hirotsugu Matoba, Hirokazu Nakamura, Masaki Matsushita, Tomomi Tanaka
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Publication number: 20060132024Abstract: An electron-emitting apparatus includes an emitter section made of a dielectric material, lower electrodes, upper electrodes having micro through holes, insulating layers disposed on the upper surface of the emitter section and between the adjacent upper electrodes, and focusing electrodes to which a predetermine potential is applied and which are disposed on the insulating layers. The electron-emitting apparatus applies a negative potential to the upper electrode to accumulate electrons in the emitter section and then applies a positive potential to the upper electrode. As a result, the polarization of the emitter section is reversed, and the accumulated electrons are emitted through the micro through holes in the upper electrodes by Coulomb repulsion. Owing to electric fields generated by the focusing electrodes, the emitted electrons travel in the upward direction of the upper electrode without spreading into a shape of a cone.Type: ApplicationFiled: September 12, 2005Publication date: June 22, 2006Applicant: NGK Insulators, Ltd.Inventors: Tsutomu Nanataki, Iwao Ohwada, Takayoshi Akao, Hirokazu Nakamura
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Publication number: 20060118827Abstract: An electron emitting apparatus includes a lower electrode, an emitter section made of a dielectric material, a plurality of upper electrodes having micro through holes, and a collector electrode opposing the upper electrodes. In this electron-emitting apparatus, electrons are accumulated in the emitter section by controlling the potential difference (drive voltage) between the lower and upper electrodes with respect to the potential of the lower electrode to a negative predetermined voltage. At this time, the collector electrode of the electron-emitting apparatus is grounded. Thus, unnecessary electron-emitting is suppressed. Subsequently, the drive voltage is changed to a positive predetermined voltage. As a result, polarization reversal occurs in the emitter section, and accumulated electros are emitted through the micro through holes in the upper electrodes by Coulomb repulsion. At this time, a positive voltage Vc is applied to the collector electrode to give large energy to accelerate the electrons.Type: ApplicationFiled: September 27, 2005Publication date: June 8, 2006Applicant: NGK Insulators, Ltd.Inventors: Iwao Ohwada, Takayoshi Akao, Tetsuyuki Kameji, Hirokazu Nakamura