Patents by Inventor Shuji Nakata
Shuji Nakata 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: 20080277810Abstract: A preform (15) is hung from an arm (72) into a heating furnace (74). The heating furnace (74) has five heater units (90-94). A gas supply device (77) supplies nitrogen gas to the heating furnace (74). The heating furnace (74) is divided into five sections by orifices (95-100), and the temperature of each divided section is controlled by the heater units (90-94) provided in each section. A seal member (106) attached to the top side of the heating furnace (74) shields the heating furnace (74) from external air, so it is possible to prevent turbulence in the divided sections in the heating furnace (74).Type: ApplicationFiled: March 29, 2005Publication date: November 13, 2008Applicant: Fujifilm CorporationInventors: Takanori Sato, Shuji Nakata, Tadahiro Kegasawa, Yukio Shirokura
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Publication number: 20080205840Abstract: A clad pipe (70) is produced by heating PVDF to 180° C., and then this PVDF being extruded from a melt-extrusion device. The clad pipe (70) has a square cross-section whose sides L1 are 20 mm length, and in a center thereof, there is a square hole. In the square hole, a core (72) mainly includes PMMA is formed. Accordingly, a preform (12) having a clad (71) of PVDF and the core (72) of PMMA is obtained. The preform (12) is heat-soften-drawn at 210° C. A drawing ratio is 1600. Finally, an optical member (14) having a 0.5 mm square cross-section is obtained.Type: ApplicationFiled: October 26, 2005Publication date: August 28, 2008Applicant: FUJIFILM CorporationInventors: Akira Wakabayashi, Shuji Nakata, Yoshisada Nakamura, Yuka Hiwatashi
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Patent number: 6705979Abstract: An apparatus for machining a web-shaped workpiece includes a workpiece supply for supplying workpiece rolls each of an elongate thin metal sheet, a processing machine for machining the elongate thin metal sheet into caps, a workpiece feeder for feeding the elongate thin metal sheet to the processing machine, and a product feeder for automatically separating the caps from scrap and feeding the caps to a product collecting mechanism. The apparatus is capable of efficiently and quickly producing various products from the elongate thin metal sheet.Type: GrantFiled: December 15, 1999Date of Patent: March 16, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Sakaguchi, Kazumasa Harada, Shuji Nakata, Masayoshi Sekino
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Publication number: 20030033706Abstract: A reduction of equipment is realized by uniting the small diameter bending station and acute-angle bending station. A ribbon adhering station that adheres ribbons to the both ends of sheet metals and cuts the ribbons is arranged on the downstream side in the sheet metal transfer direction of the small diameter bending station/acute-angle bending station. A separation station that separates sheet metals into OK and NG products is positioned on the downstream side in the sheet metal transfer direction of the ribbon adhering station, allowing this separation station to separate sheet metals into OK and NG products based on OK/NG information of the sheet metals inspected by a sheet metal inspection device installed in the sheet metal transfer path hitherto. Thus, a film cartridge plate manufacturing method and apparatus which is small, low-cost, of a simple mechanism and easy to maintain are provided.Type: ApplicationFiled: August 13, 2002Publication date: February 20, 2003Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Masayoshi Sekino, Junichi Tsuchiya, Shuji Nakata
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Patent number: 6286356Abstract: An apparatus for machining a web-shaped workpiece includes a workpiece supply for supplying workpiece rolls each of an elongate thin metal sheet, a processing machine for machining the elongate thin metal sheet into caps, a workpiece feeder for feeding the elongate thin metal sheet to the processing machine, and a product feeder for automatically separating the caps from scrap and feeding the caps to a product collecting mechanism. The apparatus is capable of efficiently and quickly producing various products from the elongate thin metal sheet.Type: GrantFiled: December 15, 1999Date of Patent: September 11, 2001Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Sakaguchi, Kazumasa Harada, Shuji Nakata, Masayoshi Sekino
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Patent number: 6027436Abstract: An apparatus for machining a web-shaped workpiece includes a workpiece supply for supplying workpiece rolls each of an elongate thin metal sheet, a processing machine for machining the elongate thin metal sheet into caps, a workpiece feeder for feeding the elongate thin metal sheet to the processing machine, and a product feeder for automatically separating the caps from scrap and feeding the caps to a product collecting mechanism. The apparatus is capable of efficiently and quickly producing various products from the elongate thin metal sheet.Type: GrantFiled: February 11, 1998Date of Patent: February 22, 2000Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Sakaguchi, Kazumasa Harada, Shuji Nakata, Masayoshi Sekino
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Patent number: 5250809Abstract: A method and device for checking a joint of an electronic component is arranged to apply heat energy to a joint containing a heat conductive material and receive the infrared ray radiated from said joint with an infrared camera. By processing the image information output from the infrared camera, the method and device can offer an area of a defect, an area ratio of a defect, pixel coordinates, a temperature distribution pattern, a distance between central axes of a particular portion of the joint, or a gradient angle. The obtained value is compared with a predetermined value for determining the kind of a defect and whether or not the joint is defective.Type: GrantFiled: January 22, 1992Date of Patent: October 5, 1993Assignees: Shuji Nakata, Denyo Kabushiki KaishaInventors: Shuji Nakata, Minoru Nakamura, Takeo Sakai, Yoshimasa Shimizu, Yoshihiro Kondo
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Patent number: 4994226Abstract: A method of producing a synthetic resin made article having a porous elastic member, which is useful as an air duct opening/closing damper adaptable in air conditions for automobiles, including the steps of:placing a porous elastic member in position against the inner wall surface of one of the opposing segments of an injection mold splittable into two or more segments;closing said injection mold and compressing said porous elastic member by the clamping pressure;casting a synthetic molding resin along the surface of said porous elastic member; andapplying a dwell pressure of a preset level for a prescribed period of time to the synthetic resin injected into said mold, anda method of producing a synthetic resin made article having porous elastic members, which is useful as an air duct opening/closing damper adapted in air conditions for automobiles, which includes the steps of:placing the porous elastic members in position against the inner wall surfaces of each pair of opposing segments of an injection moldType: GrantFiled: August 23, 1989Date of Patent: February 19, 1991Assignees: Nippondenso Co., Ltd., Shimizu Industry Company, Ltd.Inventors: Kazuhiko Nakagawa, Yuji Wakayama, Shuji Nakata, Tadashi Shimizu
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Patent number: 4677021Abstract: An air-flow control valve of the structure in which a soft foamed sheet (2) is joined to one or both surfaces of a valve body (1) made of a synthetic resin as a unitary structure via a sheet (3) for preventing the oozing of resin. The ooze-preventing sheet (3) is stuck with an adhesive or the like onto one surface of the soft foamed sheet (2) in advance, and a synthetic resin for forming the valve body (1) is placed on the stuck surface of the foamed sheet (2). Or, another foamed sheet (2) with its sticking surface being on the lower side is further placed thereon, followed by stamping. Therefore, the foamed sheet (2) is not peeled off, and the air-flow control valve exhibits sufficient buffer function against the rigid valve body (1).Type: GrantFiled: March 10, 1986Date of Patent: June 30, 1987Assignees: Shimizu Industry Company Ltd., Nippondenso Co., Ltd.Inventors: Hiroshi Kayakabe, Masaei Mitomi, Mikio Miyajima, Shuji Nakata, Tadashi Shimizu, Kazuharu Yoshito, Masamichi Nishiu
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Patent number: 4656790Abstract: A magnetic disk is rotated by a drive mechanism, and compressed air is jetted to the same positions on the two surfaces of the magnetic disk. An abrasive tape and a magnetic material surface of the magnetic disk are made to contact each other closely by compressed air, and the magnetic material surface of the magnetic disk is burnished by the abrasive tape.Type: GrantFiled: November 26, 1985Date of Patent: April 14, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Kazuo Mukai, Akira Honjoh, Shuji Nakata
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Patent number: 4521665Abstract: A method and system for determining weld quality in resistance welding in such a manner that acceptance or unacceptance is determined by comparing with their respective reference values the electrode voltage, the electrode current time, the number of electrode voltage pulse signals in excess of the reference value, and the integral of difference between the electrode voltage in excess of a base voltage and the base voltage, independently or simultaneously, in addition to the comparison of the electrode resistance with its reference value. The relatively low-priced system according to the present invention can determining weld quality accurately even when the electrode tips are deformed or crushed so as to form other current path areas.Type: GrantFiled: February 27, 1984Date of Patent: June 4, 1985Assignee: Nissan Motor Co., Ltd.Inventors: Shuji Nakata, Yoshio Kawaguchi, Akira Nishimura
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Patent number: 4503312Abstract: Method of controlling resistance welding to obtain high quality welds in which the pressure between the electrodes (2a, 2b) holding the materials (1a, 1b) to be welded is controlled so that the resistance value between the two electrodes (2a, 2b) is a predetermined value, and the welding current is regulated so that the voltage between the electrodes is a predetermined value, and the time during which the welding current flows is controlled to a fixed period.Type: GrantFiled: February 8, 1983Date of Patent: March 5, 1985Assignees: Nissan Motor Company, Limited, Nippon Avionics Co., Ltd.Inventors: Shuji Nakata, Yoshio Kawaguchi, Susumu Aono
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Patent number: 4442337Abstract: A method and system for controlling resistance welding whereby the preferred quality of resistance welding can be ensured automatically during the welding process by controlling the electrode pressure so that the electrode resistance changes in accordance with a reference resistance curve, or by additionally controlling the electrode voltage so that the electrode voltage changes in accordance with a reference voltage curve. The system according to the present invention comprises an electrode voltage sensor, an electrode current sensor, a reference resistance generator, a reference voltage generator, a differential amplifier, a pressure control device, a current controller and so on.Type: GrantFiled: April 21, 1981Date of Patent: April 10, 1984Assignee: Nissan Motor Company, LimitedInventors: Shuji Nakata, Yoshio Kawaguchi, Akira Nishimura
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Patent number: 4434351Abstract: A method and system for determining weld quality in resistance welding in such a manner that acceptance or unacceptance is determined by comparing with their respective reference values the electrode voltage, the electrode current time, the number of electrode voltage pulse signals in excess of the reference value, and the integral of difference between the electrode voltage in excess of a base voltage and the base voltage, independently or simultaneously, in addition to the comparison of the electrode resistance with its reference value. The relatively low-priced system according to the present invention can determine weld quality accurately even when the electrode tips are deformed or crushed so as to form other current path areas.Type: GrantFiled: June 1, 1981Date of Patent: February 28, 1984Assignee: Nissan Motor Company, LimitedInventors: Shuji Nakata, Yoshio Kawaguchi, Akira Nishimura
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Patent number: 4408114Abstract: A system for resistance welding in which the welding voltage between the electrodes is controlled by changing the pressure applied to the electrodes or the firing phase angle of the welding current in accordance with a reference voltage curve or a reference voltage integration curve. The system comprises a voltage sensor, a reference voltage generator, a differential amplifier, and a pressure control device, or a calculating unit for determining an appropriate firing phase angle of the welding current. The system thus improved can ensure a stable, good welding quality, since the welding voltage is always controlled by a series of optimum welding voltages, during the welding process, in accordance with a reference voltage curve with respect to time, preferably in terms of cycles of the welding current.Type: GrantFiled: January 4, 1982Date of Patent: October 4, 1983Assignee: Nissan Motor Company, LimitedInventors: Shuji Nakata, Masahiro Nishikawa, Yoshio Kawaguchi
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Patent number: 4387289Abstract: A system for resistance welding in which the welding voltage between the electrodes is controlled by changing the pressure applied to the electrodes or the firing phase angle of the welding current in accordance with a reference voltage curve or a reference voltage integration curve. The system comprises a voltage sensor, a reference voltage generator, a differential amplifier, and a pressure control device, or a calculating unit for determining an appropriate firing phase angle of the welding current. The system thus improved can ensure a stable, good welding quality, since the welding voltage is always controlled by a series of optimum welding voltages, during the welding process, in accordance with a reference voltage curve with respect to time, preferably in terms of cycles of the welding current.Type: GrantFiled: July 27, 1981Date of Patent: June 7, 1983Assignee: Nissan Motor Company, LimitedInventors: Shuji Nakata, Masahiro Nishikawa, Yoshio Kawaguchi