Patents by Inventor Eiji Nakajima
Eiji Nakajima 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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Patent number: 7049354Abstract: The present invention provides a novel oxazolidone ring-containing epoxy resin suitable for use as a resin for a coated film having a structure of the formula: wherein R3 represents a residue excluding epoxy groups of diepoxide, X represents a residue excluding isocyanate groups of polyurethane diisocyanate, and n represents an integer of 1 to 5; and wherein X has a structure of the formula: wherein R1 represents a residue excluding isocyanate groups of diisocyanate, R2 represents a residue excluding hydroxyl groups of diol, and m represents an integer of 2 to 10.Type: GrantFiled: October 6, 2003Date of Patent: May 23, 2006Assignee: Nippon Paint Co., Ltd.Inventors: Shuhei Yamoto, Eiji Nakajima, Mitsuo Yamada
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Publication number: 20040255109Abstract: a distributed computer system is composed of a plurality of cells, a service processor, and first and second modules. Each of the cells includes a CPU, a memory, and range registers used for resource routing. At least one cell is used as a spare cell, and the remainder(s) of the cells is activated to provide an online system. The first module is programmed to provide a memory region of the online system with initial values to be set into the range registers of the spare cell in response to booting the online system. The service processor provides a copy of the initial values onto the memory of the spare cell in response to a request for activating the spare cell. The second module is programmed to put the initial values obtained from the copy into the range registers of the chipset on the spare cell.Type: ApplicationFiled: June 1, 2004Publication date: December 16, 2004Applicant: NEC CORPORATIONInventor: Eiji Nakajima
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Patent number: 6751172Abstract: A wobble detecting apparatus for an information recording and/or reproducing for an optical disk, includes a wobble detecting unit for detecting a wobble on the basis of a signal from a light receiving element which receives light reflected from the optical disk; an offset voltage generating unit for generating an offset voltage; an adder unit for adding said offset voltage to a control signal to an actuator for the optical disk; an actuator switch for on/off controlling a control signal to said actuator; and a control unit for turning on said actuator for wobble detection to decide whether or not the wobble has been detected by said wobble detecting unit, and if the wobble has not been detected, causing said offset voltage generating unit to generate a positive or negative prescribed voltage to decide further whether or not the wobble has been detected by said wobble detecting unit. In this configuration, the wobble can be detected with high accuracy.Type: GrantFiled: August 22, 2001Date of Patent: June 15, 2004Assignee: Pioneer CorporationInventor: Eiji Nakajima
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Publication number: 20040068092Abstract: The present invention provides a novel oxazolidone ring-containing epoxy resin suitable for use as a resin for a coated film having a structure of the formula: 1Type: ApplicationFiled: October 6, 2003Publication date: April 8, 2004Inventors: Shuhei Yamoto, Eiji Nakajima, Mitsuo Yamada
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Patent number: 6690628Abstract: A tracking error signal compensation device for removing an offset of a tracking error signal to be used for a tracking servo control includes: a low pass filter that extracts a direct current component and a low frequency component whose frequency is lower than a reference frequency from the tracking error signal, and generates a detection signal including the extracted direct current component and the extracted low frequency component; a determination device that determines whether or not a frequency of the tracking error signal is lower than a reference frequency; a holding device that generates a hold signal by holding the detection signal generated by the low pass filter, when the determination device determines that the frequency of the tracking error signal is lower than the reference signal; a detection device that detects the offset of the tracking error signal by using the detection signal and the hold signal; and a removing device that removes the offset detected by the detection device from the trType: GrantFiled: December 5, 2002Date of Patent: February 10, 2004Assignee: Pioneer CorporationInventors: Takashi Yoshimi, Eiji Nakajima
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Patent number: 6664345Abstract: The present invention provides a novel oxazolidone ring-containing epoxy resin suitable for use as a resin for a coated film having a structure of the formula: wherein R3 represents a residue excluding epoxy groups of diepoxide, X represents a residue excluding isocyanate groups of polyurethane diisocyanate, and n represents an integer of 1 to 5; and wherein X has a structure of the formula: wherein R1 represents a residue excluding isocyanate groups of diisocyanate, R2 represents a residue excluding hydroxyl groups of diol, and m represents an integer of 2 to 10.Type: GrantFiled: August 16, 2001Date of Patent: December 16, 2003Assignee: Nippon Paint Co., Ltd.Inventors: Shuhei Yamoto, Eiji Nakajima, Mitsuo Yamada
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Patent number: 6650862Abstract: Disclosed is an image forming apparatus that enables to transversely move a sheet separator without a dedicated drive source and with a simplified construction to thereby reduce production cost of the apparatus. The image forming apparatus includes a thrust driving mechanism for reciprocating the sheet separator in an axial direction of a heater roller. The mechanism includes a worm gear which is rotated by a driving force of a drive source for rotating the heater roller, a helical gear which is meshed with the worm gear, and an eccentric cam which is mounted coaxially with an axis of rotation of the helical gear. A guide member for supporting the sheet separator is reciprocated in the axial direction of the heater roller in accordance with rotation of the eccentric cam.Type: GrantFiled: March 12, 2002Date of Patent: November 18, 2003Assignee: Kyocera Mita CorporationInventors: Kuniaki Nakano, Eiji Nakajima, Masami Fuchi
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Patent number: 6643238Abstract: A disk type discrimination method for optical disks is designed to function also with a DVD-RW of version 1.0, in which, with avoiding access to an unreadable zone, the compatibility with disks in the conventional versions including a DVD-R can be maintained, and a reproducing apparatus thereof. When a medium loaded in a reproducing apparatus is judged as a DVD, by detecting the presence or absence of wobble, searching a control data zone if the wobble is not present, if present, searching an RW physical format information zone to confirm type information, if the type information is the DVD-RW, searching again the data area to perform reproduction, if the DVD-R, searching a control data zone to confirm the DVD-R, and then reproducing, with avoiding access to an unreadable zone, the compatibility with disks in the conventional versions including the DVD-R is maintained.Type: GrantFiled: August 21, 2001Date of Patent: November 4, 2003Assignee: Pioneer CorporationInventor: Eiji Nakajima
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Publication number: 20030117912Abstract: A tracking error signal compensation device for removing an offset of a tracking error signal to be used for a tracking servo control includes: a low pass filter that extracts a direct current component and a low frequency component whose frequency is lower than a reference frequency from the tracking error signal, and generates a detection signal including the extracted direct current component and the extracted low frequency component; a determination device that determines whether or not a frequency of the tracking error signal is lower than a reference frequency; a holding device that generates a hold signal by holding the detection signal generated by the low pass filter, when the determination device determines that the frequency of the tracking error signal is lower than the reference signal; a detection device that detects the offset of the tracking error signal by using the detection signal and the hold signal; and a removing device that removes the offset detected by the detection device from the trType: ApplicationFiled: December 5, 2002Publication date: June 26, 2003Applicant: PIONEER CORPORATIONInventors: Takashi Yoshimi, Eiji Nakajima
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Patent number: 6526006Abstract: A tracking error signal compensation device for removing an offset of a tracking error signal to be used for a tracking servo control includes: a low pass filter that extracts a direct current component and a low frequency component whose frequency is lower than a reference frequency from the tracking error signal, and generates a detection signal including the extracted direct current component and the extracted low frequency component; a determination device that determines whether or not a frequency of the tracking error signal is lower than a reference frequency; a holding device that generates a hold signal by holding the detection signal generated by the low pass filter, when the determination device determines that the frequency of the tracking error signal is lower than the reference signal; a detection device that detects the offset of the tracking error signal by using the detection signal and the hold signal; and a removing device that removes the offset detected by the detection device from the trType: GrantFiled: September 9, 1999Date of Patent: February 25, 2003Assignee: Pioneer CorporationInventors: Takashi Yoshimi, Eiji Nakajima
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Patent number: 6522611Abstract: A laser beam reflected on a storage surface of a DVD is detected with a light-receiving device to allow a matrix circuit to generate a push-pull signal. The push-pull signal is converted into a binary signal, and a base-n counter, having an upper-limit count which is set to a certain value, counts the resulting signal. A count circuit 8e having a prescribed count time period counts a carry signal which is delivered by the base-n counter. Then, a detection factor is determined from the ratio of the count of the carry signal to the count time period. When the detection factor is below a prescribed value, the upper-limit count of the base-n counter or the count time period is adjusted to control the detection sensitivity. A judgment portion compares a plurality of detection factors with a prescribed threshold to find a determination rate or the ratio of the number of detection factors to be compared with to the number of detection factors which exceed the prescribed threshold.Type: GrantFiled: December 20, 2001Date of Patent: February 18, 2003Assignee: Pioneer CorporationInventor: Eiji Nakajima
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Publication number: 20020141792Abstract: Disclosed is an image forming apparatus that enables to transversely move a sheet separator without a dedicated drive source and with a simplified construction to thereby reduce production cost of the apparatus. The image forming apparatus includes a thrust driving mechanism for reciprocating the sheet separator in an axial direction of a heater roller. The mechanism includes a worm gear which is rotated by a driving force of a drive source for rotating the heater roller, a helical gear which is meshed with the worm gear, and an eccentric cam which is mounted coaxially with an axis of rotation of the helical gear. A guide member for supporting the sheet separator is reciprocated in the axial direction of the heater roller in accordance with rotation of the eccentric cam.Type: ApplicationFiled: March 12, 2002Publication date: October 3, 2002Applicant: Kyocera Mita CorporationInventors: Kuniaki Nakano, Eiji Nakajima, Masami Fuchi
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Publication number: 20020080701Abstract: A laser beam reflected on a storage surface of a DVD is detected with a light-receiving device to allow a matrix circuit to generate a push-pull signal. The push-pull signal is converted into a binary signal, and a base-n counter, having an upper-limit count which is set to a certain value, counts the resulting signal. A count circuit 8e having a prescribed count time period counts a carry signal which is delivered by the base-n counter. Then, a detection factor is determined from the ratio of the count of the carry signal to the count time period. When the detection factor is below a prescribed value, the upper-limit count of the base-n counter or the count time period is adjusted to control the detection sensitivity. A judgment portion compares a plurality of detection factors with a prescribed threshold to find a determination rate or the ratio of the number of detection factors to be compared with to the number of detection factors which exceed the prescribed threshold.Type: ApplicationFiled: December 20, 2001Publication date: June 27, 2002Applicant: Pioneer CorporationInventor: Eiji Nakajima
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Publication number: 20020044509Abstract: A disk type discrimination method for optical disks is designed to function also with a DVD-RW of version 1.0, in which, with avoiding access to an unreadable zone, the compatibility with disks in the conventional versions including a DVD-R can be maintained, and a reproducing apparatus thereof. When a medium loaded in a reproducing apparatus is judged as a DVD, by detecting the presence or absence of wobble, searching a control data zone if the wobble is not present, if present, searching an RW physical format information zone to confirm type information, if the type information is the DVD-RW, searching again the data area to perform reproduction, if the DVD-R, searching a control data zone to confirm the DVD-R, and then reproducing, with avoiding access to an unreadable zone, the compatibility with disks in the conventional versions including the DVD-R is maintained.Type: ApplicationFiled: August 21, 2001Publication date: April 18, 2002Inventor: Eiji Nakajima
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Publication number: 20020037975Abstract: The present invention provides a novel oxazolidone ring-containing epoxy resin suitable for use as a resin for a coated film having a structure of the formula: 1Type: ApplicationFiled: August 16, 2001Publication date: March 28, 2002Inventors: Shuhei Yamoto, Eiji Nakajima, Mitsuo Yamada
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Publication number: 20020024897Abstract: A wobble detecting apparatus for an information recording and/or reproducing for an optical disk, includes a wobble detecting unit for detecting a wobble on the basis of a signal from a light receiving element which receives light reflected from the optical disk; an offset voltage generating unit for generating an offset voltage; an adder unit for adding said offset voltage to a control signal to an actuator for the optical disk; an actuator switch for on/off controlling a control signal to said actuator; and a control unit for turning on said actuator for wobble detection to decide whether or not the wobble has been detected by said wobble detecting unit, and if the wobble has not been detected, causing said offset voltage generating unit to generate a positive or negative prescribed voltage to decide further whether or not the wobble has been detected by said wobble detecting unit. In this configuration, the wobble can be detected with high accuracy.Type: ApplicationFiled: August 22, 2001Publication date: February 28, 2002Applicant: PIONEER CORPORATIONInventor: Eiji Nakajima
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Patent number: D322432Type: GrantFiled: February 22, 1990Date of Patent: December 17, 1991Assignee: Tamura Electric Works, Ltd.Inventor: Eiji Nakajima
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Patent number: D353581Type: GrantFiled: February 28, 1986Date of Patent: December 20, 1994Assignee: Tamura Electric Works, Ltd.Inventor: Eiji Nakajima