Patents by Inventor Shohei Saito
Shohei Saito 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: 20160257113Abstract: An apparatus for ejecting liquids includes a liquid ejection head including a nozzle, the nozzle ejecting the liquids; and an ejection detector to detect whether the liquids are ejected from the nozzle of the liquid ejection head, the ejection detector including an insulated receiver having an adhering face to receive and adhere the liquids ejected from the nozzle and an electrode disposed on an opposite side of the adhering face of the receiver. The ejection detector detects electrical change generated when the liquids adhere to the adhering face of the receiver while generating a potential difference between the liquid ejection head and the electrode.Type: ApplicationFiled: February 18, 2016Publication date: September 8, 2016Applicant: RICOH COMPANY, LTD.Inventors: Shotaro Takeuchi, Shohei SAITO, Takahiro KIKUCHI
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Patent number: 9429888Abstract: A fixing device includes an endless fixing belt: a fixing belt holding member; a pressure member that makes a contact with the circumference of the fixing belt; a nip forming member that is disposed inside the fixing belt and forms a nip between the nip forming member and the pressure member; a nip supporting member that is made of a sheet metal; a side plate that supports the fixing belt holding member and the nip supporting member; and a pressure mechanism that presses the pressure member against the nip forming member with the fixing belt between the pressure member and the nip forming member. Both end surfaces of the nip supporting member are shear surfaces and one of the shear surfaces makes a contact with the nip forming member and the other shear surface is supported by the side plate.Type: GrantFiled: July 7, 2015Date of Patent: August 30, 2016Assignee: RICOH COMPANY, LTD.Inventors: Kohichi Utsunomiya, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Kiho Sai, Shohei Saito, Yutaka Ikebuchi, Motoyoshi Yamano
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Publication number: 20160221775Abstract: A paper conveying device includes a conveying guide, a bearing, a conveying-guide facing surface, and a separation restrictor. The conveying guide includes a conveyance surface for conveying paper and a pivot shaft and is swingable about the pivot shaft. The bearing includes a support surface facing at least an upper semiperimeter of the pivot shaft. The conveying-guide facing surface is provided to face an end of the conveying guide when the conveying guide swings. The end is opposite to the conveyance surface. The separation restrictor is provided to the conveying guide to restrict separation of the pivot shaft from the bearing at least in a given swing range of the conveying guide by contacting the conveying-guide facing surface.Type: ApplicationFiled: February 2, 2016Publication date: August 4, 2016Inventors: Arinobu YOSHIURA, Hideo NAGAFUJI, Yuji ARAI, Kohichi UTSUNOMIYA, Kiho SAI, Shohei SAITO, Yutaka IKEBUCHI, Motoyoshi YAMANO
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Patent number: 9400464Abstract: A fixing device includes an endless fixing belt, fixing-belt holding members which hold the fixing belt at opposite ends, a pressure member to be brought into contact with the fixing belt, a nip forming member arranged inside the fixing belt to form a nip area by contacting the pressure member with the fixing belt, a nip supporting member, side plates where the fixing-belt holding members and the nip supporting member are fixed, and a pressing mechanism which presses the pressure member against the nip forming member. The nip forming member includes at least three layers including a heat absorbing layer contacting the nip supporting member. With no load applied, the nip supporting member assumes a shape protruding at longitudinal center toward the pressure member and is in contact with the nip forming member while having the shape protruding at the center portion.Type: GrantFiled: July 8, 2015Date of Patent: July 26, 2016Assignee: RICOH COMPANY, LTD.Inventors: Kohichi Utsunomiya, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Shohei Saito, Qifeng Cui, Yutaka Ikebuchi, Motoyoshi Yamano
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Patent number: 9400482Abstract: A paper conveyance device comprises: a conveyance member having a conveyance surface for conveying a recording medium, the conveyance member extending in a first direction along a front-rear direction of the image forming apparatus that has an opening member for exposing inside of the apparatus, and including a handle disposed on an exposure surface of the opening member, and a swing pivot point that is used to swing the conveyance member around the first direction to expose the conveyance surface when the handle is operated in the open state. The handle is disposed in at least one position in a range between positions near a center of the conveyance member in the first direction. The positions are a certain distance away from the center of the conveyance member along the first direction.Type: GrantFiled: March 10, 2015Date of Patent: July 26, 2016Assignee: Ricoh Company, Ltd.Inventors: Shohei Saito, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Kohichi Utsunomiya, Qifeng Cui, Motoyoshi Yamano, Yutaka Ikebuchi, Yuichi Harashima, Yohichi Tsukamoto, Satoshi Endoh, Daisuke Sawada, Yuuki Nobuoka, Shingo Kuboki, Takahiro Kikuchi
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Patent number: 9354572Abstract: A fixing device includes: a rotatable endless belt type fixing member; a pressurizing member that is opposed to the fixing member and rotates; and a nip forming member that is arranged inside the fixing member, and forms a nip part by contact with the pressurizing member through the fixing member. The nip forming member includes: a heat-uniformizing member having bent portions opposed to each other; a heat-insulating member arranged inside the heat-uniformizing member; a heat-absorbing member arranged on an upper surface of the heat-insulating member; and a sliding sheet that covers a nip side of the heat-uniformizing member, and is held between the bent portions of the heat-uniformizing member and the heat-insulating member. The heat-uniformizing member and the heat-insulating member are fastened to each other by fitting a fitting part formed on the heat-uniformizing member to a fitted part formed on the heat-insulating member.Type: GrantFiled: August 26, 2015Date of Patent: May 31, 2016Assignee: RICOH COMPANY, LTD.Inventors: Arinobu Yoshiura, Hideo Nagafuji, Yuji Arai, Yutaka Ikebuchi, Kohichi Utsunomiya, Motoyoshi Yamano, Kiho Sai, Shohei Saito
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Patent number: 9298146Abstract: A fixing device includes: a rotatable fixing member formed as an endless belt; a heat source to heat the fixing member; a nip-forming member being not rotatable and arranged inside the fixing member; and a pressure member arranged outside the fixing member and forming a nip between the pressure member and the fixing member. The nip-forming member is formed of a first heat transmission unit and a sliding sheet. The first heat transmission unit includes an abutting part abutting the fixing member with the sliding sheet therebetween, and a bent part or bent parts extending inside the fixing member at upstream or upstream and downstream of the nip in a transport direction of a recording medium. A retaining part to catch and retain the sliding sheet is provided at a tip of at least the bent part at upstream of the nip in the transport direction.Type: GrantFiled: March 11, 2015Date of Patent: March 29, 2016Assignee: RICOH COMPANY, LIMITEDInventors: Arinobu Yoshiura, Hideo Nagafuji, Yuji Arai, Kohichi Utsunomiya, Shohei Saito, Qifeng Cui, Yutaka Ikebuchi, Motoyoshi Yamano, Kenji Ishii, Hiromasa Takagi, Keitaro Shoji
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Publication number: 20160062286Abstract: A fixing device includes: a rotatable endless belt type fixing member; a pressurizing member that is opposed to the fixing member and rotates; and a nip forming member that is arranged inside the fixing member, and forms a nip part by contact with the pressurizing member through the fixing member. The nip forming member includes: a heat-uniformizing member having bent portions opposed to each other; a heat-insulating member arranged inside the heat-uniformizing member; a heat-absorbing member arranged on an upper surface of the heat-insulating member; and a sliding sheet that covers a nip side of the heat-uniformizing member, and is held between the bent portions of the heat-uniformizing member and the heat-insulating member. The heat-uniformizing member and the heat-insulating member are fastened to each other by fitting a fitting part formed on the heat-uniformizing member to a fitted part formed on the heat-insulating member.Type: ApplicationFiled: August 26, 2015Publication date: March 3, 2016Inventors: Arinobu YOSHIURA, Hideo NAGAFUJI, Yuji ARAI, Yutaka IKEBUCHI, Kohichi UTSUNOMIYA, Motoyoshi YAMANO, Kiho SAI, Shohei SAITO
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Publication number: 20160033906Abstract: A fixing device includes: a fixing member; an opposing member that provides a fixing nip with the fixing member; a heating unit that heats the fixing member; a heating area changing member that moves to change a heating area of the fixing member heated by the heating unit; and a position detection sensor that detects a position of the heating area changing member. The fixing device controls a stop position of the heating area changing member based on detection by the position detection sensor. The single position detection sensor detects the position of the heating area changing member both when the heating area changing member is moving from a preset reference position to an arbitrary position and when the heating area changing member is moving back from an arbitrary position to the reference position.Type: ApplicationFiled: July 22, 2015Publication date: February 4, 2016Applicant: RICOH COMPANY, LTD.Inventors: Yutaka Ikebuchi, Hideo Nagafuji, Yuji Arai, Kohichi Utsunomiya, Arinobu Yoshiura, Kiho Sai, Motoyoshi Yamano, Shohei Saito
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Publication number: 20160011549Abstract: A fixing device includes an endless fixing belt: a fixing belt holding member; a pressure member that makes a contact with the circumference of the fixing belt; a nip forming member that is disposed inside the fixing belt and forms a nip between the nip forming member and the pressure member; a nip supporting member that is made of a sheet metal; a side plate that supports the fixing belt holding member and the nip supporting member; and a pressure mechanism that presses the pressure member against the nip forming member with the fixing belt between the pressure member and the nip forming member. Both end surfaces of the nip supporting member are shear surfaces and one of the shear surfaces makes a contact with the nip forming member and the other shear surface is supported by the side plate.Type: ApplicationFiled: July 7, 2015Publication date: January 14, 2016Inventors: Kohichi UTSUNOMIYA, Hideo NAGAFUJI, Yuji ARAI, Arinobu YOSHIURA, Kiho SAI, Shohei SAITO, Yutaka IKEBUCHI, Motoyoshi YAMANO
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Publication number: 20160011550Abstract: A fixing device includes an endless fixing belt, fixing-belt holding members which hold the fixing belt at opposite ends, a pressure member to be brought into contact with the fixing belt, a nip forming member arranged inside the fixing belt to form a nip area by contacting the pressure member with the fixing belt, a nip supporting member, side plates where the fixing-belt holding members and the nip supporting member are fixed, and a pressing mechanism which presses the pressure member against the nip forming member. The nip forming member includes at least three layers including a heat absorbing layer contacting the nip supporting member. With no load applied, the nip supporting member assumes a shape protruding at longitudinal center toward the pressure member and is in contact with the nip forming member while having the shape protruding at the center portion.Type: ApplicationFiled: July 8, 2015Publication date: January 14, 2016Inventors: Kohichi UTSUNOMIYA, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Shohei Saito, Qifeng Cui, Yutaka Ikebuchi, Motoyoshi Yamano
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Publication number: 20160011548Abstract: A device includes a fixing belt, a holder that holds the fixing belt, a pressing member that comes in contact with the fixing belt, a nip-forming-member arranged inside the fixing belt, that forms a nip by coming in contact with the pressing member, a supporting member that supports the nip-forming-member, a side plate to which the nip-forming-member and the supporting member are fixed, and a pressing mechanism that presses a pressing roller to the nip-forming-member via the fixing belt. The supporting member includes at least two plates. The two plates are separated from each other near a contact portion where the plates come in contact with the nip-forming-member. At least a part of each of the plates is a flat surface parallel to a direction of a load applied by the pressing mechanism. Portions of the two plates on a side distant from the contact portion are joined together.Type: ApplicationFiled: July 2, 2015Publication date: January 14, 2016Inventors: Kohichi UTSUNOMIYA, Hideo NAGAFUJI, Yuji ARAI, Arinobu YOSHIURA, Qifeng CUI, Shohei SAITO, Yutaka IKEBUCHI, Motoyoshi YAMANO
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Publication number: 20150268626Abstract: A paper conveyance device comprises: a conveyance member having a conveyance surface for conveying a recording medium, the conveyance member extending in a first direction along a front-rear direction of the image forming apparatus that has an opening member for exposing inside of the apparatus, and including a handle disposed on an exposure surface of the opening member, and a swing pivot point that is used to swing the conveyance member around the first direction to expose the conveyance surface when the handle is operated in the open state. The handle is disposed in at least one position in a range between positions near a center of the conveyance member in the first direction. The positions are a certain distance away from the center of the conveyance member along the first direction.Type: ApplicationFiled: March 10, 2015Publication date: September 24, 2015Applicant: Ricoh Company, Ltd.Inventors: Shohei Saito, Hideo Nagafuji, Yuji Arai, Arinobu Yoshiura, Kohichi Utsunomiya, Qifeng Cui, Motoyoshi Yamano, Yutaka Ikebuchi, Yuichi Harashima, Yohichi Tsukamoto, Satoshi Endoh, Daisuke Sawada, Yuuki Nobuoka, Shingo Kuboki, Takahiro Kikuchi
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Publication number: 20150261157Abstract: A fixing device includes: a fixing member that is rotatable and in an endless shape; a heat source that heats the fixing member; a nip forming member that is arranged inside the fixing member; and a pressurizing member that is pressurized to be in contact with the nip forming member through the fixing member, to form a fixing nip. The fixing device fixes an unfixed image on a recording medium by passing the recording medium that carries the unfixed image through the fixing nip. The nip forming member includes a base layer, and a high thermal-conductive layer that is arranged on a surface layer of the base layer on a fixing nip side, and that has higher thermal conductivity than the base layer, and in the high thermal-conductive layer, a low thermal-conductive portion is arranged near an end portion in an axial direction of the fixing member.Type: ApplicationFiled: March 13, 2015Publication date: September 17, 2015Inventors: Motoyoshi YAMANO, Kohichi UTSUNOMIYA, Hiromasa TAKAGI, Kenji ISHII, Takayuki SEKI, Keitaro SHOJI, Hideo NAGAFUJI, Yuji ARAI, Arinobu YOSHIURA, Shohei SAITO, Qifeng CUI, Yutaka IKEBUCHI
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Publication number: 20150261147Abstract: A fixing device includes a fixing member configured to be revolvable while being heated by a heat source; a counter rotator configured to form a nip between the fixing member and the counter rotator by applying a pressure to the fixing member in a contact state with the fixing member; a shield member disposed inside the fixing member to partially shield heat from the heat source; and a holding member attached to an end of the fixing member. The shield member includes a spacer configured to define a clearance to allow the holding member to be inserted into the fixing member from an end of the fixing member, the clearance being between the shield member and an inner surface of the end of the fixing member.Type: ApplicationFiled: March 13, 2015Publication date: September 17, 2015Inventors: Yuji ARAI, Hideo NAGAFUJI, Kohichi UTSUNOMIYA, Arinobu YOSHIURA, Shohei SAITO, Qifeng CUI, Yutaka IKEBUCHI, Motoyoshi YAMANO
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Publication number: 20150261155Abstract: A fixing device includes: a rotatable fixing member formed as an endless belt; a heat source to heat the fixing member; a nip-forming member being not rotatable and arranged inside the fixing member; and a pressure member arranged outside the fixing member and forming a nip between the pressure member and the fixing member. The nip-forming member is formed of a first heat transmission unit and a sliding sheet. The first heat transmission unit includes an abutting part abutting the fixing member with the sliding sheet therebetween, and a bent part or bent parts extending inside the fixing member at upstream or upstream and downstream of the nip in a transport direction of a recording medium. A retaining part to catch and retain the sliding sheet is provided at a tip of at least the bent part at upstream of the nip in the transport direction.Type: ApplicationFiled: March 11, 2015Publication date: September 17, 2015Inventors: Arinobu YOSHIURA, Hideo NAGAFUJI, Yuji ARAI, Kohichi UTSUNOMIYA, Shohei SAITO, Qifeng CUI, Yutaka IKEBUCHI, Motoyoshi YAMANO, Kenji ISHII, Hiromasa TAKAGI, Keitaro SHOJI
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Patent number: 8948257Abstract: A technique for improving a compression rate without needing new determination information (encoding flag information) is provided. For compression of each area to be encoded, based on a skip mode (a process which does not compress information of the area to be encoded, but copies previous information of the area to be encoded), it is determined whether an existing predicted image generated by an existing encoding standard is used, or an interpolation predicted image newly generated by executing move searching between decoded images is used.Type: GrantFiled: September 30, 2010Date of Patent: February 3, 2015Assignee: Hitachi Maxell, Ltd.Inventors: Yuto Komatsu, Toru Yokoyama, Tomokazu Murakami, Shohei Saito, Katsuyuki Nakamura
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Patent number: 8798153Abstract: A method of decoding videos comprises the steps of performing, in respect of a decoding objective area of decoding objective frame, a motion search by using images of plural frames finished with decoding and deciding, on the basis of the result of the motion search, whether an image of the decoding objective area is to be generated through an interpolation process or a decoded image is to be generated through motion compensation using data included in an encoding stream.Type: GrantFiled: November 18, 2009Date of Patent: August 5, 2014Assignee: Hitachi Consumer Electronics Co., Ltd.Inventors: Shohei Saito, Masashi Takahashi, Muneaki Yamaguchi, Hiroaki Ito, Koichi Hamada
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Patent number: 8315467Abstract: The invention aims at reducing the circuit size while maintaining the creation of a predictive image suitable for the intra prediction based on a pipeline processing. The encoding device is operated to perform intra prediction in blocks of pixels resulting from division of a frame of a moving image has a pseudo-local-decode-image-creation module for simply encoding an original image, and an intra prediction module for using the created pseudo local decode image to select an intra prediction mode. In the intra prediction based on pipeline processing, the pipeline stage for selecting an intra prediction mode and the pipeline stage for creating predictive image data according to the selected intra prediction mode are separated.Type: GrantFiled: May 4, 2009Date of Patent: November 20, 2012Assignee: Renesas Electronics CorporationInventors: Katsuyuki Nakamura, Toru Yokoyama, Shohei Saito
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Publication number: 20110080951Abstract: A technique for improving a compression rate without needing new determination information (encoding flag information) is provided. For compression of each area to be encoded, based on a skip mode (a process which does not compress information of the area to be encoded, but copies previous information of the area to be encoded), it is determined whether an existing predicted image generated by an existing encoding standard is used, or an interpolation predicted image newly generated by executing move searching between decoded images is used.Type: ApplicationFiled: September 30, 2010Publication date: April 7, 2011Applicant: Hitachi Consumer Electronics Co., Ltd.Inventors: Yuto KOMATSU, Toru YOKOYAMA, Tomokazu MURAKAMI, Shohei SAITO, Katsuyuki NAKAMURA