Patents by Inventor Katsumi Shirai
Katsumi Shirai 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: 8805240Abstract: There is provided a cleaning device for removing residual toner on an image carrier. The cleaning device includes a housing to cover a specified region of an image carrier. A first cleaning section and a second cleaning section are respectively placed in upper and lower parts of the housing partitioned by a partition member. The first cleaning section includes a first cleaning brush and a first regulating member. The second cleaning section includes a second cleaning brush and a second regulating member. The partition member substantially extends in a continuous manner with respect to a horizontal direction from the specified region to at least a position equivalent to an end portion on a housing sidewall side of the first or the second regulating member. A clearance exists between the housing sidewall and an end portion on the housing sidewall side of the partition member.Type: GrantFiled: December 4, 2009Date of Patent: August 12, 2014Assignee: Konica Minolta, Inc.Inventors: Katsumi Shirai, Hideji Higashimura, Morihisa Kawahara, Takumi Michibata
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Publication number: 20100329738Abstract: An image forming apparatus having a feed unit, a door, an in-body sheet feed section and a disposable unit. The feed unit has a component of a sheet path for single-side printing and a component of a sheet path for double-side printing. The door has a component of the sheet path for double-side printing. The in-body sheet feed section has a component of the sheet path for single-side printing, and the disposable unit includes a part of the in-body sheet feed section. The feed unit and the door are capable of pivoting on respective pivot shafts. When the door is closed, the door, the feed unit and the in-body sheet feed section form the sheet path for single-side printing and the sheet path for double-side printing.Type: ApplicationFiled: June 29, 2010Publication date: December 30, 2010Applicant: Konica Minolta Business Technologies, Inc.Inventor: Katsumi SHIRAI
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Patent number: 7855851Abstract: A magnetic disk device includes a head that reads position information, a position-information correction value for correcting the position information, and an error correcting code for the position-information correction value from a storage medium; a microcontroller unit (MCU) and an error check and correct (ECC) circuit for correcting an error in the position-information correction value based on the error correcting code; and a static var compensator (SVC) that performs position control based on either one of the position-information correction value read by the head and the position-information correction value with the error corrected by the MCU and the ECC circuit, and the position information read by the head so that the head is located at a target position on the storage medium.Type: GrantFiled: March 30, 2009Date of Patent: December 21, 2010Assignee: Toshiba Storage Device CorporationInventor: Katsumi Shirai
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Patent number: 7852597Abstract: A storage medium driving apparatus includes a head slider opposed to a storage medium, an acceleration detector detecting an acceleration of the apparatus. A control circuit retracts the head slider from above the storage medium according to a result detected by the acceleration detector and selectively executes one or more operations from among a plurality kinds of operations according to an index that is derived from the result detected by the acceleration detector and represents an amount of an impact energy.Type: GrantFiled: March 11, 2009Date of Patent: December 14, 2010Assignee: Toshiba Storage Device CorporationInventor: Katsumi Shirai
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Publication number: 20100246055Abstract: A magnetic disk device includes a head that reads position information, a position-information correction value for correcting the position information, and an error correcting code for the position-information correction value from a storage medium; an MCU and an ECC circuit for correcting an error in the position-information correction value based on the error correcting code; and an SVC that performs position control based on either one of the position-information correction value read by the head and the position-information correction value with the error corrected by the MCU and the ECC circuit, and the position information read by the head so that the head is located at a target position on the storage medium.Type: ApplicationFiled: March 30, 2009Publication date: September 30, 2010Applicant: FUJITSU LIMITEDInventor: Katsumi Shirai
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Publication number: 20100143010Abstract: There is provided a cleaning device for removing residual toner on an image carrier. The cleaning device includes a housing to cover a specified region of an image carrier. A first cleaning section and a second cleaning section are respectively placed in upper and lower parts of the housing partitioned by a partition member. The first cleaning section includes a first cleaning brush and a first regulating member. The second cleaning section includes a second cleaning brush and a second regulating member. The partition member substantially extends in a continuous manner with respect to a horizontal direction from the specified region to at least a position equivalent to an end portion on a housing sidewall side of the first or the second regulating member. A clearance exists between the housing sidewall and an end portion on the housing sidewall side of the partition member.Type: ApplicationFiled: December 4, 2009Publication date: June 10, 2010Applicant: Konica Minolta Business Technologies, Inc.Inventors: Katsumi SHIRAI, Hideji HIGASHIMURA, Morihisa KAWAHARA, Takumi MICHIBATA
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Patent number: 7706734Abstract: In an image forming apparatus, a toner image formed on an intermediate transfer belt is transferred to a transfer sheet by a transfer electric field generated between a secondary transfer roller and a driving roller. A guide surface of a pre-transfer guide and a flat portion of the intermediate transfer belt form an angle of no less than 13° and no greater than 17°, and a distance from a tip of the guide surface and the flat portion is no less than 1.0 mm and no greater than 3.0 mm.Type: GrantFiled: November 29, 2007Date of Patent: April 27, 2010Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hideji Higashimura, Yusuke Ukai, Katsumi Shirai
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Patent number: 7602129Abstract: A motor drive control unit includes a chip in which everything about a control system is provided and controls a spindle motor which rotates magnetic disks at a constant speed. When a measurement instruction is received from a disturbance generating unit and the upper-level device, sine wave disturbance is generated in the revolution speed of the spindle motor which depends on the motor drive control unit. A speed detecting unit detects the revolution speed of the spindle motor as measured data while the disturbance is being generated by the disturbance generating unit. A measured data transferring unit transfers the detected measured data detected by the speed detecting unit to the upper-level device, wherein control characteristics such as gains and phases with respect to frequencies of the motor control unit are computed.Type: GrantFiled: July 19, 2006Date of Patent: October 13, 2009Assignee: Fujitsu LimitedInventors: Katsumi Shirai, Eiji Okamura
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Publication number: 20090237840Abstract: A storage medium driving apparatus includes a head slider opposed to a storage medium, an acceleration detector detecting an acceleration of the apparatus. A control circuit retracts the head slider from above the storage medium according to a result detected by the acceleration detector and selectively executes one or more operations from among a plurality kinds of operations according to an index that is derived from the result detected by the acceleration detector and represents an amount of an impact energy.Type: ApplicationFiled: March 11, 2009Publication date: September 24, 2009Applicant: FUJITSU LIMITEDInventor: Katsumi Shirai
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Publication number: 20080122168Abstract: In an image forming apparatus, a toner image formed on an intermediate transfer belt is transferred to a transfer sheet by a transfer electric field generated between a secondary transfer roller and a driving roller. A guide surface of a pre-transfer guide and a flat portion of the intermediate transfer belt form an angle of no less than 13° and no greater than 17°, and a distance from a tip of the guide surface and the flat portion is no less than 1.0 mm and no greater than 3.0 mm.Type: ApplicationFiled: November 29, 2007Publication date: May 29, 2008Applicant: Konica Minolta Business Technologies, Inc.Inventors: Hideji Higashimura, Yusuke Ukai, Katsumi Shirai
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Publication number: 20070229006Abstract: A motor drive control unit includes a chip in which everything about a control system is provided and controls a spindle motor which rotates magnetic disks at a constant speed. When a measurement instruction is received from a disturbance generating unit and the upper-level device, sine wave disturbance is generated in the revolution speed of the spindle motor which depends on the motor drive control unit. A speed detecting unit detects the revolution speed of the spindle motor as measured data while the disturbance is being generated by the disturbance generating unit. A measured data transferring unit transfers the detected measured data detected by the speed detecting unit to the upper-level device, wherein control characteristics such as gains and phases with respect to frequencies of the motor control unit are computed.Type: ApplicationFiled: July 19, 2006Publication date: October 4, 2007Inventors: Katsumi Shirai, Eiji Okamura
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Patent number: 6988178Abstract: This invention relates to the emulation processing method of a storage device and the storage device for accessing storage medium from a host that has a different sector size, and where alternate processing is performed in the sector unit of storage medium even when there is a writing error when updating the disk. In a system where a second sector size of a host is smaller than a first sector size of the storage medium, data that are staged in a buffer according to a request from the host is rewritten using write data, and then staged sector data or the rewritten sector data are saved in an alternate area and the storage medium is updated with the rewritten sector data. Since the sector data before updating is saved beforehand, it is possible to perform alternate processing using the sector unit of the storage medium.Type: GrantFiled: September 29, 2000Date of Patent: January 17, 2006Assignee: Fujitsu LimitedInventors: Katsumi Shirai, Kiyotaka Fukawa, Takahiro Nakano
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Patent number: 6701413Abstract: In a disk drive, a read-ahead operation is prevented from being aborted due to an interrupt such as an error, to prevent the operation of a host device from stopping and to enhance reliability. The disk drive is connected to a host computer, the host device, via an interface, and performs read ahead after reading data in accordance with a data read command received from the host computer. When a read-ahead abort prevention function is provided at the host computer side, if the read ahead is interrupted by detecting an error at the disk drive side during the read ahead, the host device, after receiving an error report, causes the disk drive to resume the read ahead from the address at which the read ahead was interrupted. On the other hand, when the read-ahead abort prevention function is provided at the disk drive side, the disk drive, upon detecting an error, retries the read ahead from the address at which the error occurred.Type: GrantFiled: September 13, 2001Date of Patent: March 2, 2004Assignee: Fujitsu LimitedInventors: Katsumi Shirai, Ichiro Anzai
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Patent number: 6643085Abstract: An accessible count information which is the number of accessible times for recording medium is recorded on an additional recording dedicated area in the recording medium. Each time the recording medium is accessed, the accessible count information is subtracted and the value of remaining accessible count information is recorded in a non-recorded portion of the dedicated area. In this case, the access to the recording medium is controlled based on the minimum value of the accessible count information recorded in the dedicated area.Type: GrantFiled: November 19, 1999Date of Patent: November 4, 2003Assignee: Fujitsu LimitedInventors: Katsumi Shirai, Ichiro Anzai
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Publication number: 20030169660Abstract: An accessible count information which is the number of accessible times for recording medium is recorded on an additional recording dedicated area in the recording medium. Each time the recording medium is accessed, the accessible count information is subtracted and the value of remaining accessible count information is recorded in a non-recorded portion of the dedicated area. In this case, the access to the recording medium is controlled based on the minimum value of the accessible count information recorded in the dedicated area.Type: ApplicationFiled: November 19, 1999Publication date: September 11, 2003Inventors: KATSUMI SHIRAI, ICHIRO ANZAI
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Patent number: 6371166Abstract: In a solenoid valve device in which connection terminals, each of which is connected to one of a plurality of solenoid valves fixed in a mounting block, are placed inside a common coupler, a coupler assembly integrally comprising the coupler is detachably mounted on the mounting block at a position which is spaced back from each of the solenoid parts, and elastic connecting members made from an electrically conductive metal are provided between each of a plurality of first flat terminals which are fixedly positioned on the side of the coupler assembly facing the mounting block so as to connect to the corresponding electrically conductive lead members arranged in the coupler assembly and second flat terminals, each of which is arranged at the rear end of each of the solenoid parts so as to be individually opposite the first flat terminals.Type: GrantFiled: November 30, 2000Date of Patent: April 16, 2002Assignee: Keihin CorporationInventors: Hiroshi Yoshizawa, Katsumi Shirai, Akira Nagasaki, Shigeto Ryuen, Masayuki Shibata
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Publication number: 20020038406Abstract: In a disk drive, a read-ahead operation is prevented from being aborted due to an interrupt such as an error, to prevent the operation of a host device from stopping and to enhance reliability. The disk drive is connected to a host computer, the host device, via an interface, and performs read ahead after reading data in accordance with a data read command received from the host computer. When a read-ahead abort prevention function is provided at the host computer side, if the read ahead is interrupted by detecting an error at the disk drive side during the read ahead, the host device, after receiving an error report, causes the disk drive to resume the read ahead from the address at which the read ahead was interrupted. On the other hand, when the read-ahead abort prevention function is provided at the disk drive side, the disk drive, upon detecting an error, retries the read ahead from the address at which the error occurred.Type: ApplicationFiled: September 13, 2001Publication date: March 28, 2002Applicant: FUJITSU LIMITEDInventors: Katsumi Shirai, Ichiro Anzai
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Patent number: 4770257Abstract: This invention provides a method of preventing loss of muddy water used in boring a hole in the ground by a drill bit or the like with the muddy water introduced into the hole to stabilize hole walls and to remove slime resulting from the boring. When the muddy water is getting lost to the soil, a chemical liquid comprising an isocyanate compound or including an isocyanate compound as a main component is introduced along with a fibrous filler to a depth of the hole. The position from which the muddy water is leaking is filled with the fibrous filler and is sealed with a cured product of the chemical liquid.Type: GrantFiled: January 23, 1987Date of Patent: September 13, 1988Assignee: Kabushiki Kaisha Takenaka KomutenInventors: Motoki Kondo, Hirosuke Kubota, Mamoru Shinozaki, Toshiyuki Oshita, Tomohiro Teramura, Masayasu Kitano, Katsumi Shirai