Patents by Inventor Yasuyuki Hirai
Yasuyuki Hirai 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: 20040138345Abstract: The present invention discloses a process for producing a benzoxazine resin which comprises the steps of reacting a phenol compound, an aldehyde compound and a primary amine in the presence of an organic solvent to synthesize a benzoxazine resin and removing generated condensation water and the organic solvent from a system under heating and a reduced pressure, wherein a pressure in the reaction system at the time of removal is set to 260 mmHg or higher.Type: ApplicationFiled: September 10, 2003Publication date: July 15, 2004Inventors: Teruki Aizawa, Yasuyuki Hirai, Syunichi Numata
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Patent number: 6748707Abstract: A utility interface system is disclosed for use in a work environment of the type having a floor system. The floor system may be of a type having an access opening and an upper surface. A compartment is configured within the access opening and has a cover. A module is adapted to be received within the compartment. The module can be stowed or concealed within the compartment while not in use and removed from the compartment for use.Type: GrantFiled: July 24, 2001Date of Patent: June 15, 2004Assignee: Steelcase Development CorporationInventors: Mark A. Buchalter, George V. Weller, Howard M. Montgomery, Thomas G. Feldpausch, Douglas L. Bartrand, Carl V. Forslund, III, Arthur Y. Tsubaki, Yasuyuki Hirai
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Publication number: 20040090501Abstract: For eliminating waste of ink and achieving high charging efficiency with a reduced charging time where a printing head is equipped with a second tank for reserving a predetermined amount of ink and a supply system is configured to supply ink from a first tank to the second tank intermittently, the second tank is provided with a variable internal volume. The internal volume is varied to cause the second tank itself to function as an actuator for charging ink and performing a venting process. Specifically, the internal volume is forcibly reduced to cause a reverse flow of a gas residing in the second tank along with ink into the first tank, which makes it possible to generate of waste ink that is released to the outside. A normal charging operation can be completed simply by causing a change in the opposite direction (the direction of increasing the internal volume). Relatedly, the second tank may be provided with a member for holding ink and generating a negative pressure originating from an elastic force.Type: ApplicationFiled: August 1, 2003Publication date: May 13, 2004Applicant: Canon Kabushiki KaishaInventors: Masahito Yoshida, Naoji Otsuka, Hiroyuki Inoue, Takashi Nojima, Hitoshi Sugimoto, Shusuke Inamura, Yasufumi Tanaami, Takeshi Iwasaki, Noriko Sato, Yasuyuki Hirai, Takeshi Yazawa
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Publication number: 20040076805Abstract: The present invention discloses a thermosetting resin composition which comprises (A) 35 to 75 parts by weight of a thermosetting resin comprising a compound having a dihydrobenzoxazine ring as a main component, (B) 10 to 25 parts by weight of a polycondensation product of a phenol, a compound having a triazine ring and an aldehyde, and (C) 10 to 45 parts by weight of an epoxy resin, based on 100 parts by weight of the total amount of organic solid components of Components (A), (B) and (C), and (i) a bisphenol F epoxy resin having a weight average molecular weight of 1,000 to 3,000, or (ii) a mixed epoxy resin of bisphenol F epoxy resin and bisphenol A epoxy resin having a weight average molecular weight of 1,000 to 3,000, is contained in Component (C) in an amount of 0 to 100% by weight of Component (C); and a prepreg, a laminated board for a wiring board and a wiring board using the same.Type: ApplicationFiled: July 9, 2003Publication date: April 22, 2004Inventors: Kenichi Oohori, Yoshihiro Nakamura, Hiraki Murai, Yoshiyuki Takeda, Yasuyuki Hirai, Shinichi Kamoshida, Minoru Kakitani, Norihiro Abe, Syunichi Numata, Teruki Aizawa, Ken Nanaumi
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Patent number: 6720077Abstract: The present invention relates to a resin composition containing an epoxy resin, an amine-type curing agent, an organophosphorus compound having a structure represented by formula 1 and an organic solvent, wherein the epoxy resin and the organophosphorus compound has been compounded at a temperature of 50° C. or lower. The resin composition has enough flame retardancy without containing any halogen-containing flame retarder, has good heat resistance and good chemical resistance, and causes no problems with respect to reaction stability or curability caused by consumption of an epoxy resin through a reaction occurring during compounding of the resin composition.Type: GrantFiled: February 13, 2002Date of Patent: April 13, 2004Assignee: Hitachi Chemical Co., Ltd.Inventors: Yasuyuki Hirai, Hironori Suzuki, Yoshiyuki Takeda, Kenichi Oohori, Shinichi Kamoshida, Minoru Kakitani, Norihiro Abe
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Patent number: 6718153Abstract: In a developing device according to the present invention, a developing roller 8 has a fixed shaft 12 and a sleeve 13. The length of a draw-up magnetic pole N3 provided in the fixed shaft 12 is made shorter than the length of a main magnetic pole N1. Accordingly, the amount of a developer adhering to both ends of an outer peripheral surface of the sleeve 13 is reduced, so that the density of the developer at both the ends of the sleeve 13 is maintained in suitable conditions in a state where the developer is over the main magnetic pole N1.Type: GrantFiled: October 30, 2002Date of Patent: April 6, 2004Assignee: Kyocera Mita CorporationInventors: Ryoji Nishimura, Yasuyuki Hirai, Kotaro Kawasaki, Satoru Yonemoto, Naoyuki Ishida, Yukihiro Ito, Hideki Kitagawa, Hideki Takeda, Shinsuke Kawashima
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Publication number: 20040041876Abstract: A head recovery device for an ink jet recording apparatus is provided with a pigment ink discharge port for discharging pigment ink and a dye ink discharge port for discharging dye ink. The device comprises a pigment ink cap for capping the pigment ink discharging port and a dye ink cap for capping the dye ink discharge port, and, in a predetermined recovery operation, a preliminary discharge is executed from the dye ink discharge port to the pigment ink cap.Type: ApplicationFiled: October 3, 2001Publication date: March 4, 2004Inventors: Haruo Uchida, Isao Ebisawa, Yasuyuki Hirai
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Publication number: 20040034129Abstract: Disclosed are a varnish for laminate or prepreg, comprising a heat treatment product which is obtained by mixing together (a) an epoxy resin, (b) dicyandiamide, and (c) a compound having an imidazole ring so that the component (c) is present in an amount of 0.001 to 0.03% by weight, based on the weight of the component (a), and subjecting the resultant mixture to reaction for heat treatment in an organic solvent at a temperature of 70° C. to less than 140° C. so that all of the components are compatible with one another in the absence of a solvent; and (d) inorganic filler, a laminate or prepreg prepared using the varnish and a printed wiring board prepared using the laminate and/or prepreg.Type: ApplicationFiled: June 12, 2003Publication date: February 19, 2004Inventors: Yasuyuki Hirai, Norihiro Abe, Yoshiyuki Takeda
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Publication number: 20040021727Abstract: An ink jet recording apparatus includes a cap capable of moving in approaching and receding directions against a discharge port surface of a recording unit for covering the discharge port surface, a wiper sliding while contacting with the discharge port surface to wipe the discharge port surface to clean it, a wiper driving gear for transferring drive to the wiper, a cam and gear member equipped with a cam portion for controlling the movement of the cap and a gear portion for transferring drive to the wiper driving gear, in which the cam and gear member is configured so that the gear portion engages with the wiper driving gear after the cap has moved to a position where the cap does not interfere with the wiper. By such a configuration, both of capping operation and wiping operation can be controlled with the single cam and gear member, which makes it possible to miniaturize a recovery mechanism portion for keeping and recovering the ink discharging performance of the recording unit.Type: ApplicationFiled: July 11, 2003Publication date: February 5, 2004Applicant: CANON KABUSHIKI KAISHAInventor: Yasuyuki Hirai
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Patent number: 6685308Abstract: The present invention provides an image forming apparatus for forming an image by discharging liquid from a recording head onto a recording medium, comprising a carriage to which the recording head and a sub-tank for storing the liquid to be supplied to the recording head are mounted and which can be shifted reciprocally, a main tank disposed out of the carriage and adapted to store the liquid, a liquid flow passage connected between the main tank and the sub-tank in order to supply the liquid from the main tank to the sub-tank, a flow passage opening/closing valve disposed in the liquid flow passage on the way and adapted to open and close the liquid flow passage, and control means for controlling opening/closing of the flow passage opening/closing valve in accordance with an image forming condition during image formation using the recording head.Type: GrantFiled: August 21, 2002Date of Patent: February 3, 2004Assignee: Canon Kabushiki KaishaInventors: Masahito Yoshida, Hiroyuki Inoue, Takashi Nojima, Shusuke Inamura, Yasufumi Tanaami, Takeshi Iwasaki, Noriko Sato, Yasuyuki Hirai
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Patent number: 6663233Abstract: In a structure which includes a second tank for reserving a predetermined amount of ink to be supplied to a printing head and in which a supply system is configured such that ink is intermittently supplied to the second tank from a first tank, a high charging efficiency to and shortened processing time for charging the second tank, and high overall usability of ink are achieved. In an orientation upon using the printing apparatus, a port of a channel located at the second tank side for supplying ink from the first tank to the second tank is arranged relatively high position and an outlet port for supplying ink from the second tank to the head is arranged relatively low position in relation to the direction of gravity, and a port of the channel located at the first tank side is arranged at the bottom of the first tank.Type: GrantFiled: June 17, 2002Date of Patent: December 16, 2003Assignee: Canon Kabushiki KaishaInventors: Naoji Otsuka, Hiroyuki Inoue, Masahito Yoshida, Takashi Nojima, Hitoshi Sugimoto, Shusuke Inamura, Yasufumi Tanaami, Takeshi Iwasaki, Noriko Sato, Yasuyuki Hirai, Takeshi Yazawa
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Publication number: 20030173278Abstract: An ink tank is formed having a generally rectangular parallelepiped shape, and air/fluid separating members having air pores are provided around at least the corner portions of the generally rectangular parallelepiped. The inner faces of wall members forming the outer faces of the generally rectangular parallelepiped are formed with an inclination of a predetermined angle as to the outer face of the wall member which it faces.Type: ApplicationFiled: March 7, 2003Publication date: September 18, 2003Applicant: CANON KABUSHIKI KAISHAInventors: Hiroyuki Inoue, Masahito Yoshida, Takashi Nojima, Shusuke Inamura, Yasufumi Tanaami, Takeshi Iwasaki, Noriko Sato, Yasuyuki Hirai
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Publication number: 20030160846Abstract: In a supply system which includes an ink container for reserving a predetermined amount of ink to be supplied to a printing head and which is configured such that ink is intermittently supplied to the container from an ink tank, there is provided a structure that fundamentally eliminates waste of ink associated with an operation of charging the container to apply a required negative pressure to the head. An ink containing body in which a negative pressure can be generated because of its elasticity is provided in the container. After the ink containing body is expanded to introduce ink into the same by depressurizing the interior of the container, the interior of the container is pressurized to contract the ink containing body, thereby returning a predetermined amount of ink to the tank. A negative pressure is thus generated in equilibrium with an ink meniscus holding ability of the head.Type: ApplicationFiled: February 21, 2003Publication date: August 28, 2003Applicant: CANON KABUSHIKI KAISHAInventors: Masahito Yoshida, Naoji Otsuka, Hiroyuki Inoue, Takashi Nojima, Hitoshi Sugimoto, Shusuke Inamura, Yasufumi Tanaami, Takeshi Iwasaki, Noriko Sato, Yasuyuki Hirai, Takeshi Yazawa
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Publication number: 20030103783Abstract: In a developing device according to the present invention, a developing roller 8 has a fixed shaft 12 and a sleeve 13. The length of a draw-up magnetic pole N3 provided in the fixed shaft 12 is made shorter than the length of a main magnetic pole N1. Accordingly, the amount of a developer adhering to both ends of an outer peripheral surface of the sleeve 13 is reduced, so that the density of the developer at both the ends of the sleeve 13 is maintained in suitable conditions in a state where the developer is over the main magnetic pole N1.Type: ApplicationFiled: October 30, 2002Publication date: June 5, 2003Inventors: Ryoji Nishimura, Yasuyuki Hirai, Kotaro Kawasaki, Satoru Yonemoto, Naoyuki Ishida, Yukihiro Ito, Hideki Kitagawa, Hideki Takeda, Shinsuke Kawashima
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Publication number: 20030063167Abstract: The present invention provides an image forming apparatus for forming an image by discharging liquid from a recording head onto a recording medium, comprising a carriage to which the recording head and a sub-tank for storing the liquid to be supplied to the recording head are mounted and which can be shifted reciprocally, a main tank disposed out of the carriage and adapted to store the liquid, a liquid flow passage connected between the main tank and the sub-tank in order to supply the liquid from the main tank to the sub-tank, a flow passage opening/closing valve disposed in the liquid flow passage on the way and adapted to open and close the liquid flow passage, and control means for controlling opening/closing of the flow passage opening/closing valve in accordance with an image forming condition during image formation using the recording head.Type: ApplicationFiled: August 21, 2002Publication date: April 3, 2003Inventors: Masahito Yoshida, Hiroyuki Inoue, Takashi Nojima, Shusuke Inamura, Yasufumi Tanaami, Takeshi Iwasaki, Noriko Sato, Yasuyuki Hirai
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Patent number: 6523821Abstract: A feeder apparatus arranged on a side of a main body of an image forming apparatus is provided with a top door and a vertical door. The top door is provided in an opening defined above a sheet stacker, and the vertical door is provided in an opening defined on a side of the sheet stacker to enable an operator to replenish sheets inside the feeder apparatus. Switches are provided to detect as to whether the top door or the vertical door is opened. The feeder apparatus is constructed in such a manner that upward movement of the sheet stacker is suspended when the top door is detected to be opened and that upward and downward movement of the sheet stacker is suspended when the vertical door is detected to be opened.Type: GrantFiled: February 21, 2001Date of Patent: February 25, 2003Assignee: Kyocera Mita CorporationInventors: Nobuyuki Kashiwagi, Masami Fuchi, Yasuyuki Hirai, Yoshihiro Yamaguchi, Yukio Hashimoto, Masaki Higashiyama
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Publication number: 20030007047Abstract: For eliminating waste of ink and achieving high charging efficiency with a reduced charging time where a printing head is equipped with a second tank for reserving a predetermined amount of ink and a supply system is configured to supply ink from a first tank to the second tank intermittently, a second tank having a variable internal volume is provided, and the internal volume is varied to cause the second tank itself functions as an actuator for charging ink and performing a venting process. Specifically, the internal volume is forcibly reduced to cause a reverse flow of a gas residing in the second tank along with ink into the first tank, which makes it possible to generation of waste ink that is released to the outside. A normal charging operation can be completed simply by causing a change in the opposite direction (the direction of increasing the internal volume).Type: ApplicationFiled: June 17, 2002Publication date: January 9, 2003Inventors: Naoji Otsuka, Hiroyuki Inoue, Masahito Yoshida, Takashi Nojima, Hitoshi Sugimoto, Shusuke Inamura, Yasufumi Tanaami, Takeshi Iwasaki, Noriko Sato, Yasuyuki Hirai, Takeshi Yazawa
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Publication number: 20030007048Abstract: In a structure which includes a second tank for reserving a predetermined amount of ink to be supplied to a printing head and in which a supply system is configured such that ink is intermittently supplied to the second tank from a first tank, a high charging efficiency to and shortened processing time for charging the second tank, and high overall usability of ink are achieved. In an orientation upon using the printing apparatus, a port of a channel located at the second tank side for supplying ink from the first tank to the second tank is arranged relatively high position and an outlet port for supplying ink from the second tank to the head is arranged relatively low position in relation to the direction of gravity, and a port of the channel located at the first tank side is arranged at the bottom of the first tank.Type: ApplicationFiled: June 17, 2002Publication date: January 9, 2003Inventors: Naoji Otsuka, Hiroyuki Inoue, Masahito Yoshida, Takashi Nojima, Hitoshi Sugimoto, Shusuke Inamura, Yasufumi Tanaami, Takeshi Iwasaki, Noriko Sato, Yasuyuki Hirai, Takeshi Yazawa
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Publication number: 20030007045Abstract: A structure which includes a container for reserving a predetermined amount of ink to be supplied to a printing head and in which a supply system is configured such that ink is intermittently supplied to the container from an ink tank as an ink supply source makes it possible to reduce the time for charging the container with ink. A member for holding ink and generating a negative pressure originating from an elastic force is provided in the container. With connecting the tank and the member, the pressure in the container is reduced to cause the member to expand, thereby introducing ink into the same. This introduction is stopped by regulating the expansion with a displaceable unit. A negative pressure is generated in the member by canceling regulation by the unit to put it in equilibrium with an ink meniscus holding ability of the printing head.Type: ApplicationFiled: June 17, 2002Publication date: January 9, 2003Inventors: Masahito Yoshida, Naoji Otsuka, Hiroyuki Inoue, Takashi Nojima, Hitoshi Sugimoto, Shusuke Inamura, Yasufumi Tanaami, Takeshi Iwasaki, Noriko Sato, Yasuyuki Hirai, Takeshi Yazawa
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Publication number: 20020155298Abstract: The present invention relates to a resin composition containing an epoxy resin, an amine-type curing agent, an organophosphorus compound having a structure represented by formula 1 and an organic solvent, wherein the epoxy resin and the organophosphorus compound has been compounded at a temperature of 50° C. or lower. The resin composition has enough flame retardancy without containing any halogen-containing flame retarder, has good heat resistance and good chemical resistance, and causes no problems with respect to reaction stability or curability caused by consumption of an epoxy resin through a reaction occurring during compounding of the resin composition.Type: ApplicationFiled: February 13, 2002Publication date: October 24, 2002Inventors: Yasuyuki Hirai, Hironori Suzuki, Yoshiyuki Takeda, Kenichi Oohori, Shinichi Kamoshida, Minoru Kakitani, Norihiro Abe