Patents by Inventor Kazuya Saitoh
Kazuya Saitoh 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: 11967294Abstract: A common electrode driver includes an inverting amplifier including a first resistor, a second resistor, and an operational amplifier, and a resistance ratio adjustment circuit that adjusts, in accordance with a length of one horizontal scan period, a resistance ratio being a ratio of a resistance value of the second resistor to a resistance value of the first resistor. A feedback voltage is provided to one end of the first resistor. The resistance ratio adjustment circuit sets the resistance ratio when second driving is performed, in which a length of one horizontal scan period is a second time longer than a first time, to be smaller than the resistance ratio when first driving is performed, in which a length of one horizontal scan period is the first time.Type: GrantFiled: May 1, 2023Date of Patent: April 23, 2024Assignee: Sharp Display Technology CorporationInventors: Masaki Uehata, Yasuki Mori, Kohji Saitoh, Takayuki Mizunaga, Kazuya Kondoh, Takashi Nojima, Kazuhisa Yoshimoto, Kosuke Kawamoto, Hiroyuki Kito, Kazuki Nakamichi
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Patent number: 10120303Abstract: An image forming system includes a post-processing unit capable of performing a post-processing on the sheet on which the toner image is formed. The image forming system is capable of executing a transfer cleaning operation to more toner from a transfer member to an image bearer by electrostatic force caused by cleaning bias applied by a bias applying unit in a state where the image bearer and the transfer member are rotated, to clean the transfer member, as an inter-sheet operation performed when at least one of inter-sheet areas that exist on the image bearer during a successive image forming period. The image forming system is capable of executing a rotation stop operation to stop rotation of the image bearer and the transfer member, as the inter-sheet operation when the post-processing is performed, in addition to the transfer cleaning operation, before or after the transfer cleaning operation is executed.Type: GrantFiled: January 3, 2017Date of Patent: November 6, 2018Assignee: RICOH COMPANY, LTD.Inventors: Takeshi Kojima, Tomoya Ohmura, Sho Sekiguchi, Taichi Urayama, Kazuya Saitoh, Takuya Moriyama, Hiroomi Tamura, Tetsuto Ueda, Naoyuki Ozaki
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Publication number: 20180209034Abstract: Provided is a target material which suppresses contamination of a gate electrode during sputtering and which is used to form a gate electrode capable of achieving stable TFT characteristics. This target material contains a total of 50 atom % or more of one or more elements (M) selected from among the group consisting of W, Nb, Ta, Ni, Ti and Cr, with the remainder comprising Mo and unavoidable impurities, wherein a content of K, which is one of the unavoidable impurities, is preferably 0.4 to 20.0 ppm by mass and a content of W as the element (M) is preferably 10 to 50 atom %.Type: ApplicationFiled: July 26, 2016Publication date: July 26, 2018Applicant: Hitachi Metals, Ltd.Inventors: Masashi KAMINADA, Kazuya SAITOH, Yuu TAMADA, Hide UENO
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Patent number: 9778608Abstract: A control device for an image forming apparatus that transitions to a restricted mode which is a print mode to alternately transition between a printable state to perform a print operation, in which a predetermined print amount is printable, and a sleep state to stop a subsequent print operation for a predetermined sleep time after the print operation is performed, includes a print-operation determiner and a print controller. The print-operation determiner determines, when a print-operation execution request to the image forming apparatus is received in the sleep state, whether the image forming apparatus is to perform the subsequent print operation based on a print amount of the print-operation execution request. The print controller controls the subsequent print operation of the image forming apparatus according to a determination result of the print-operation determiner as to whether the image forming apparatus is to perform the subsequent print operation.Type: GrantFiled: May 18, 2016Date of Patent: October 3, 2017Assignee: RICOH COMPANY, LTD.Inventors: Kazuya Saitoh, Takeshi Kojima, Sho Sekiguchi, Tatsumi Yamada, Takuya Moriyama
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Patent number: 9709919Abstract: A developing device includes a casing containing a two-component developer including toner and carrier, a developer bearer to transfer the developer on the developer bearer to a developing area, a toner density sensor to output an output value based on toner density of the developer, a toner density detection module to detect the toner density based on the output value of the toner density sensor and output characteristics relating the toner density and the output value, an acquisition module to acquire the output characteristics based on the output value of the toner density sensor relating a new developer and a predetermined toner density of the new developer, a bulk density fluctuation estimating module to estimate bulk density fluctuation for bulk density of the new developer, and a correction module to correct the output value based on the estimated bulk density fluctuation.Type: GrantFiled: May 22, 2015Date of Patent: July 18, 2017Assignee: RICOH COMPANY, LTD.Inventors: Kazuya Saitoh, Hiroomi Tamura, Tetsuto Ueda, Sho Sekiguchi
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Patent number: 9689067Abstract: Provided is a method by which a low-oxygen and high-density molybdenum target can be efficiently obtained, while fully utilizing the characteristics of each molybdenum (Mo) starting material powder. The present invention provides a method for producing a molybdenum target, wherein a mixed powder that is obtained by mixing a molybdenum powder A, which is prepared by reducing molybdenum oxide and then crushing the resulting so as to have an average particle diameter of 2-15 ?m, and a molybdenum powder B, which is prepared by crushing a molybdenum bulk starting material having a density of not less than 6.64×10 (kg/m3) so as to have an average particle diameter of 50-2,000 ?m, is sintered under pressure.Type: GrantFiled: September 14, 2011Date of Patent: June 27, 2017Assignee: HITACHI METALS, LTD.Inventors: Kazuya Saitoh, Tomoyuki Hata, Masashi Kaminada, Hiroshi Takashima
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Publication number: 20170115609Abstract: An image forming system includes a post-processing unit capable of performing a post-processing on the sheet on which the toner image is formed. The image forming system is capable of executing a transfer cleaning operation to more toner from a transfer member to an image bearer by electrostatic force caused by cleaning bias applied by a bias applying unit in a state where the image bearer and the transfer member are rotated, to clean the transfer member, as an inter-sheet operation performed when at least one of inter-sheet areas that exist on the image bearer during a successive image forming period. The image forming system is capable of executing a rotation stop operation to stop rotation of the image bearer and the transfer member, as the inter-sheet operation when the post-processing is performed, in addition to the transfer cleaning operation, before or after the transfer cleaning operation is executed.Type: ApplicationFiled: January 3, 2017Publication date: April 27, 2017Inventors: Takeshi KOJIMA, Tomoya OHMURA, Sho SEKIGUCHI, Taichi URAYAMA, Kazuya SAITOH, Takuya MORIYAMA, Hiroomi TAMURA, Tetsuto UEDA, Naoyuki OZAKI
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Patent number: 9575441Abstract: An image forming system includes a post-processing unit capable of performing a post-processing on the sheet on which the toner image is formed. The image forming system is capable of executing a transfer cleaning operation to move toner from a transfer member to an image bearer by electrostatic force caused by cleaning bias applied by a bias applying unit in a state where the image bearer and the transfer member are rotated, to clean the transfer member, as an inter-sheet operation performed when at least one of inter-sheet areas that exist on the image bearer during a successive image forming period. The image forming system is capable of executing a rotation stop operation to stop rotation of the image bearer and the transfer member, as the inter-sheet operation when the post-processing is performed, in addition to the transfer cleaning operation, before or after the transfer cleaning operation is executed.Type: GrantFiled: November 2, 2015Date of Patent: February 21, 2017Assignee: RICOH COMPANY, LTD.Inventors: Takeshi Kojima, Tomoya Ohmura, Sho Sekiguchi, Taichi Urayama, Kazuya Saitoh, Takuya Moriyama, Hiroomi Tamura, Tetsuto Ueda, Naoyuki Ozaki
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Publication number: 20160342120Abstract: A control device for an image forming apparatus that transitions to a restricted mode which is a print mode to alternately transition between a printable state to perform a print operation, in which a predetermined print amount is printable, and a sleep state to stop a subsequent print operation for a predetermined sleep time after the print operation is performed, includes a print-operation determiner and a print controller. The print-operation determiner determines, when a print-operation execution request to the image forming apparatus is received in the sleep state, whether the image forming apparatus is to perform the subsequent print operation based on a print amount of the print-operation execution request. The print controller controls the subsequent print operation of the image forming apparatus according to a determination result of the print-operation determiner as to whether the image forming apparatus is to perform the subsequent print operation.Type: ApplicationFiled: May 18, 2016Publication date: November 24, 2016Applicant: Ricoh Company, Ltd.Inventors: Kazuya SAITOH, Takeshi KOJIMA, Sho SEKIGUCHI, Tatsumi YAMADA, Takuya MORIYAMA
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Patent number: 9454106Abstract: An image forming apparatus is provided in which, during a continuous sheet passing, in the case where a between-sheets time is short, none of a cleaning mode and a drive OFF mode is performed; in the case where the between-sheets time is of a medium length of time, the cleaning mode is performed but the drive OFF mode is not performed; and in the case where the between-sheets time is long, both the cleaning mode and the drive OFF mode are performed. As a result, degradation of an image bearer due to the cleaning bias is alleviated, decreased productivity due to the cleaning mode is alleviated, a problem is alleviated in which a back surface of a recording medium gets dirty due to toner adhered to a transfer rotation body, and another problem is alleviated in which the service life of a driven member is shortened.Type: GrantFiled: July 28, 2015Date of Patent: September 27, 2016Assignee: Ricoh Company, Ltd.Inventors: Sho Sekiguchi, Takeshi Kojima, Tomoya Ohmura, Hiroomi Tamura, Tetsuto Ueda, Kazuya Saitoh, Taichi Urayama, Takuya Moriyama, Naoyuki Ozaki
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Image forming apparatus and method of switching collected developer route in image forming apparatus
Patent number: 9442429Abstract: An image forming apparatus includes an image bearer; a developing device; a transfer device; a waste-developer container; a developer collecting device including a collected-developer conveyor, a waste channel, a reuse channel, and a channel switching member to switch a route between the waste channel and the reuse channel; a switching determiner to determine whether to dispose or reuse collected developer; an operating condition data collector to collect and store operating condition data used as a degradation speed index of developer in the developing device; a determination type selector to select, according to the degradation speed index, one of a first determination type based on an operating amount and a second determination type based on developer replacement data indicating an amount of developer replaced with supplied developer in the developing device; and a switching controller to control the channel switching member according to determination made by the switching determiner.Type: GrantFiled: July 28, 2015Date of Patent: September 13, 2016Assignee: RICOH COMPANY, LTD.Inventors: Tetsuto Ueda, Hiroomi Tamura, Kazuya Saitoh, Sho Sekiguchi, Hirokatsu Suzuki, Takeshi Kojima, Takuma Iwasaki, Taichi Urayama -
Publication number: 20160131999Abstract: An image forming system includes a post-processing unit capable of performing a post-processing on the sheet on which the toner image is formed. The image forming system is capable of executing a transfer cleaning operation to move toner from a transfer member to an image bearer by electrostatic force caused by cleaning bias applied by a bias applying unit in a state where the image bearer and the transfer member are rotated, to clean the transfer member, as an inter-sheet operation performed when at least one of inter-sheet areas that exist on the image bearer during a successive image forming period. The image forming system is capable of executing a rotation stop operation to stop rotation of the image bearer and the transfer member, as the inter-sheet operation when the post-processing is performed, in addition to the transfer cleaning operation, before or after the transfer cleaning operation is executed.Type: ApplicationFiled: November 2, 2015Publication date: May 12, 2016Inventors: Takeshi KOJIMA, Tomoya OHMURA, Sho SEKIGUCHI, Taichi URAYAMA, Kazuya SAITOH, Takuya MORIYAMA, Hiroomi TAMURA, Tetsuto UEDA, Naoyuki OZAKI
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Patent number: 9316997Abstract: An image forming apparatus that includes an image bearer, a developing device to develop a latent image, a transfer device to transfer a developed image from the image bearer, a developer collecting device to collect developer remaining on the image bearer, and a waste-developer container to contain developer to be disposed. The apparatus also includes a switching determiner to perform a determination of a preferred transfer amount of developer in a target period, an estimation of an accumulative consumption of developer in the target period, a determination of whether to dispose or reuse collected developer, and a determination of whether to perform switching between disposal and reuse of the collected developer based on comparison between the preferred transfer amount and the estimated accumulative consumption of developer. The apparatus also includes a switching controller to cause the developer collecting device to perform the switching between disposal and reuse.Type: GrantFiled: February 13, 2015Date of Patent: April 19, 2016Assignee: Ricoh Company, Ltd.Inventors: Tetsuto Ueda, Hiroomi Tamura, Kazuya Saitoh, Sho Sekiguchi, Hirokatsu Suzuki, Takeshi Kojima, Takuma Iwasaki
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Publication number: 20160041509Abstract: An image forming apparatus is provided in which, during a continuous sheet passing, in the case where a between-sheets time is short, none of a cleaning mode and a drive OFF mode is performed; in the case where the between-sheets time is of a medium length of time, the cleaning mode is performed but the drive OFF mode is not performed; and in the case where the between-sheets time is long, both the cleaning mode and the drive OFF mode are performed. As a result, degradation of an image bearer due to the cleaning bias is alleviated, decreased productivity due to the cleaning mode is alleviated, a problem is alleviated in which a back surface of a recording medium gets dirty due to toner adhered to a transfer rotation body, and another problem is alleviated in which the service life of a driven member is shortened.Type: ApplicationFiled: July 28, 2015Publication date: February 11, 2016Inventors: Sho SEKIGUCHI, Takeshi KOJIMA, Tomoya OHMURA, Hiroomi TAMURA, Tetsuto UEDA, Kazuya SAITOH, Taichi URAYAMA, Takuya MORIYAMA, Naoyuki OZAKI
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IMAGE FORMING APPARATUS AND METHOD OF SWITCHING COLLECTED DEVELOPER ROUTE IN IMAGE FORMING APPARATUS
Publication number: 20160041504Abstract: An image forming apparatus includes an image bearer; a developing device; a transfer device; a waste-developer container; a developer collecting device including a collected-developer conveyor, a waste channel, a reuse channel, and a channel switching member to switch a route between the waste channel and the reuse channel; a switching determiner to determine whether to dispose or reuse collected developer; an operating condition data collector to collect and store operating condition data used as a degradation speed index of developer in the developing device; a determination type selector to select, according to the degradation speed index, one of a first determination type based on an operating amount and a second determination type based on developer replacement data indicating an amount of developer replaced with supplied developer in the developing device; and a switching controller to control the channel switching member according to determination made by the switching determiner.Type: ApplicationFiled: July 28, 2015Publication date: February 11, 2016Applicant: RICOH COMPANY, LTD.Inventors: Tetsuto UEDA, Hiroomi TAMURA, Kazuya SAITOH, Sho SEKIGUCHI, Hirokatsu SUZUKI, Takeshi KOJIMA, Takuma IWASAKI, Taichi URAYAMA -
Publication number: 20150355572Abstract: A developing device includes a casing containing a two-component developer including toner and carrier, a developer bearer to transfer the developer on the developer bearer to a developing area, a toner density sensor to output an output value based on toner density of the developer, a toner density detection module to detect the toner density based on the output value of the toner density sensor and output characteristics relating the toner density and the output value, an acquisition module to acquire the output characteristics based on the output value of the toner density sensor relating a new developer and a predetermined toner density of the new developer, a bulk density fluctuation estimating module to estimate bulk density fluctuation for bulk density of the new developer, and a correction module to correct the output value based on the estimated bulk density fluctuation.Type: ApplicationFiled: May 22, 2015Publication date: December 10, 2015Inventors: Kazuya SAITOH, Hiroomi Tamura, Tetsuto Ueda, Sho Sekiguchi
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Publication number: 20150227108Abstract: An image forming apparatus includes an image bearer; a developing device to develop a latent image; a transfer device to transfer a developed image from the image bearer; a developer collecting device to collect developer remaining on the image bearer; a waste-developer container to contain developer to be disposed, a switching determiner to perform determination of a preferred transfer amount of developer in a target period, estimation of an accumulative consumption of developer in the target period, determination of whether to dispose or reuse collected developer collected by the developer collecting device, and determination of whether to perform switching between disposal and reuse of the collected developer based on comparison between the preferred transfer amount and the estimated accumulative consumption of developer; and a switching controller to cause the developer collecting device to perform the switching between disposal and reuse.Type: ApplicationFiled: February 13, 2015Publication date: August 13, 2015Applicant: RICOH COMPANY, LTD.Inventors: Tetsuto Ueda, Hiroomi Tamura, Kazuya Saitoh, Sho Sekiguchi, Hirokatsu Suzuki, Takeshi Kojima, Takuma Iwasaki
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Patent number: 9064519Abstract: A soft magnetic under layer has a low antiferromagnetic coupling force and a high saturation magnetic flux density. The soft magnetic under layer includes two soft magnetic layers and a spacer layer. The soft magnetic layers are expressed by a composition formula as (Fe100-XCoX)100-Y-MY by atomic ratio, wherein 15?X?30, 10?Y?30, and an element M is at least one element selected from a group of Ta, Ti, Zr, Nb, Cr, and B; are composed of residual incidental impurities; and each have a thickness of 10 to 50 nm. The spacer layer is composed of one element selected from a group of Ru, Cr, Cu, Re, and Rh and has a thickness of 0.10 to 0.50 nm. The soft magnetic layers are antiferromagnetically coupled through the spacer layer inserted therebetween. An antiferromagnetic coupling force between the soft magnetic layers is 100 to 4,000 A/m.Type: GrantFiled: July 5, 2012Date of Patent: June 23, 2015Assignee: HITACHI METALS, LTD.Inventors: Jun Fukuoka, Kazuya Saitoh
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Patent number: 9042778Abstract: A powder refilling device includes a refill powder chamber to accommodate a powder bag containing powder, an opener to open the powder bag inside the refill powder chamber, and a squeezer to squeeze the opened powder bag to discharge powder therefrom and reduce a volume of the opened powder bag.Type: GrantFiled: June 28, 2013Date of Patent: May 26, 2015Assignee: Ricoh Company, Ltd.Inventors: Kazuya Saitoh, Akio Kosuge, Hirokatsu Suzuki, Ryuji Yoshida, Takuya Suganuma, Tetsuto Ueda, Taichi Urayama, Sho Sekiguchi
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Publication number: 20140027012Abstract: A powder refilling device includes a refill powder chamber to accommodate a powder bag containing powder, an opener to open the powder bag inside the refill powder chamber, and a squeezer to squeeze the opened powder bag to discharge powder therefrom and reduce a volume of the opened powder bag.Type: ApplicationFiled: June 28, 2013Publication date: January 30, 2014Applicant: Ricoh Company, Ltd.Inventors: Kazuya SAITOH, Akio KOSUGE, Hirokatsu SUZUKI, Ryuji YOSHIDA, Takuya SUGANUMA, Tetsuto UEDA, Taichi URAYAMA, Sho SEKIGUCHI