Patents by Inventor Koichi Saitoh
Koichi 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: 8444244Abstract: A print control apparatus includes: an operation state storing section that stores operation information relating to operation states of a plurality of printing elements arranged in a printing head; and a drawing controlling section that causes the plurality of printing elements to draw a test image for checking the operation states of the plurality of printing elements, wherein the test image includes a set of a predetermined number of lines that are drawn in parallel with one another in a predetermined direction, and the drawing controlling section causes a printing element placed in the vicinity of a printing element determined as a malfunction on the basis of the operation information, to draw a check line having a predetermined length and thickness in the test image.Type: GrantFiled: March 27, 2008Date of Patent: May 21, 2013Assignee: Fuji Xerox Co., Ltd.Inventors: Masatoshi Araki, Koichi Saitoh
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Patent number: 7837320Abstract: A liquid droplet ejection apparatus comprising a liquid droplet ejection head that ejects liquid droplets, a conveyor belt that retains and conveys a recording medium while causing the recording medium to face the liquid droplet ejection head, and a charge roll that causes the recording medium to be electrostatically attracted to the conveyor belt. The charge roll and the conveyor belt are configured not to contact each other, and a gap between the charge roll and the conveyor belt is less than the thickness of the recording medium.Type: GrantFiled: June 9, 2006Date of Patent: November 23, 2010Assignee: Fuji Xerox Co., Ltd.Inventors: Satoshi Mohri, Hiroaki Satoh, Koichi Saitoh
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Patent number: 7669959Abstract: A droplet ejection device includes a droplet ejection head, a conveyance member, a cleaning unit and a coating unit. The droplet ejection head ejects droplets. The conveyance member retains a recording medium and conveys the recording medium to oppose the droplet ejection head. The cleaning unit cleans the conveyance member. The coating unit applies a coating liquid, with a characteristic of repelling the liquid that is ejected from the droplet ejection head, onto the conveyance member. A surface tension ?o of the coating liquid, a critical surface tension ?b of the conveyance member, and a surface tension ?i of the liquid that is ejected from the droplet ejection head satisfy the following equations (1) and (2).Type: GrantFiled: August 14, 2006Date of Patent: March 2, 2010Assignee: Fuji Xerox Co., Ltd.Inventors: Masahiko Sekimoto, Koichi Saitoh, Hiroaki Satoh, Susumu Kibayashi, Satoshi Mohri, Toru Nishida
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Publication number: 20090207226Abstract: The invention presents a pattern forming apparatus including: an intermediate transfer body; a particle supply unit, for forming a liquid receptive particle layer of a specified layer thickness by supplying liquid receptive particles, capable of receiving a recording liquid containing recording material and also capable of trapping the recording material at the surface thereof, onto the intermediate transfer body; a liquid droplet ejection unit for ejecting liquid droplets of the recording liquid on the liquid receptive particle layer on the basis of specified data, and forming a pattern of the recording material near the surface of the liquid receptive particle layer; and a transferring unit, for transferring the liquid receptive particle layer containing the recording liquid onto a transfer object, so that the pattern is placed between the transfer object (recording medium) and the liquid receptive particle layer.Type: ApplicationFiled: February 3, 2009Publication date: August 20, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Hiroshi Ikeda, Ken Hashimoto, Masahiko Fujii, Jun Isozaki, Koichi Saitoh, Naosuke Ino
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Patent number: 7559641Abstract: An image recording apparatus is disclosed wherein an image is recorded on a recording medium based on image information by ejecting liquid droplets from a liquid droplet ejecting head. A liquid droplet ejecting head is provided which has an ejection region substantially corresponding to a width of the recording medium. A conveyor unit is provided which conveys the recording medium to the ejection region of the liquid droplet ejecting head with the recording medium attracted and attached thereto and supported thereon. The recording medium is fed from the conveyor unit to a paper discharge section. Further, a plurality of attracting and supporting sub-units are provided which are vertically moved with the recording medium, which is delivered thereto from the conveyor unit, attracted and attached thereto and supported thereon, thereby conveying the recording medium to a subsequent step.Type: GrantFiled: August 15, 2005Date of Patent: July 14, 2009Assignee: Fuji Xerox Co., Ltd.Inventors: Toru Nishida, Hiroaki Satoh, Akira Mihara, Kiyoshi Hosoi, Satoshi Mohri, Toyoji Ushioda, Takeshi Zengo, Koichi Saitoh
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Publication number: 20090079781Abstract: A print control apparatus includes: an operation state storing section that stores operation information relating to operation states of a plurality of printing elements arranged in a printing head; and a drawing controlling section that causes the plurality of printing elements to draw a test image for checking the operation states of the plurality of printing elements, wherein the test image includes a set of a predetermined number of lines that are drawn in parallel with one another in a predetermined direction, and the drawing controlling section causes a printing element placed in the vicinity of a printing element determined as a malfunction on the basis of the operation information, to draw a check line having a predetermined length and thickness in the test image.Type: ApplicationFiled: March 27, 2008Publication date: March 26, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Masatoshi Araki, Koichi Saitoh
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Patent number: 7452051Abstract: An inkjet recording apparatus conducts image recording by ejecting ink and a reactive liquid that reacts with the ink onto a recording medium conveyed by an endless conveyor component. The inkjet recording apparatus includes: a dummy ejection controller that dummy-ejects one of the ink and the reactive liquid onto a first position on the endless conveyor component and dummy-ejects the other of the reactive liquid and the ink onto a second position on the endless conveyor component where the one of the ink and the reactive liquid is not adherent; and a cleaning device that cleans the ink and the reactive liquid on the endless conveyor component.Type: GrantFiled: November 16, 2005Date of Patent: November 18, 2008Assignee: Fuji Xerox Co., Ltd.Inventors: Tohru Mihara, Hiroaki Satoh, Naoki Morita, Koichi Saitoh, Takamaro Yamashita, Masao Mashima
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Publication number: 20070171251Abstract: A droplet ejection device includes a droplet ejection head, a conveyance member, a cleaning unit and a coating unit. The droplet ejection head ejects droplets. The conveyance member retains a recording medium and conveys the recording medium to oppose the droplet ejection head. The cleaning unit cleans the conveyance member. The coating unit applies a coating liquid, with a characteristic of repelling the liquid that is ejected from the droplet ejection head, onto the conveyance member. A surface tension ?o of the coating liquid, a critical surface tension ?b of the conveyance member, and a surface tension ?i of the liquid that is ejected from the droplet ejection head satisfy the following equations (1) and (2).Type: ApplicationFiled: August 14, 2006Publication date: July 26, 2007Inventors: Masahiko Sekimoto, Koichi Saitoh, Hiroaki Satoh, Susumu Kibayashi, Satoshi Mohri, Toru Nishida
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Publication number: 20070109386Abstract: A liquid droplet ejection apparatus comprising a liquid droplet ejection head that ejects liquid droplets, a conveyor belt that retains and conveys a recording medium while causing the recording medium to face the liquid droplet ejection head, and a charge roll that causes the recording medium to be electrostatically attracted to the conveyor belt. The charge roll and the conveyor belt are configured not to contact each other, and a gap between the charge roll and the conveyor belt is less than the thickness of the recording medium.Type: ApplicationFiled: June 9, 2006Publication date: May 17, 2007Inventors: Satoshi Mohri, Hiroaki Satoh, Koichi Saitoh
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Publication number: 20060284951Abstract: The invention presents a pattern forming apparatus including: an intermediate transfer body; a particle supply unit, for forming a liquid receptive particle layer of a specified layer thickness by supplying liquid receptive particles, capable of receiving a recording liquid containing recording material and also capable of trapping the recording material at the surface thereof, onto the intermediate transfer body; a liquid droplet ejection unit for ejecting liquid droplets of the recording liquid on the liquid receptive particle layer on the basis of specified data, and forming a pattern of the recording material near the surface of the liquid receptive particle layer; and a transferring unit, for transferring the liquid receptive particle layer containing the recording liquid onto a transfer object, so that the pattern is placed between the transfer object (recording medium) and the liquid receptive particle layer.Type: ApplicationFiled: May 31, 2006Publication date: December 21, 2006Inventors: Hiroshi Ikeda, Ken Hashimoto, Masahiko Fujii, Jun Isozaki, Koichi Saitoh, Naosuke Ino
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Publication number: 20060209153Abstract: An image recording apparatus is disclosed wherein an image is recorded on a recording medium based on image information by ejecting liquid droplets from a liquid droplet ejecting head. A liquid droplet ejecting head is provided which has an ejection region substantially corresponding to a width of the recording medium. A conveyor unit is provided which conveys the recording medium to the ejection region of the liquid droplet ejecting head with the recording medium attracted and attached thereto and supported thereon. The recording medium is fed from the conveyor unit to a paper discharge section. Further, a plurality of attracting and supporting sub-units are provided which are vertically moved with the recording medium, which is delivered thereto from the conveyor unit, attracted and attached thereto and supported thereon, thereby conveying the recording medium to a subsequent step.Type: ApplicationFiled: August 15, 2005Publication date: September 21, 2006Inventors: Toru Nishida, Hiroaki Satoh, Akira Mihara, Kiyoshi Hosoi, Satoshi Mohri, Toyoji Ushioda, Takeshi Zengo, Koichi Saitoh
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Publication number: 20060164459Abstract: An inkjet recording apparatus conducts image recording by ejecting ink and a reactive liquid that reacts with the ink onto a recording medium conveyed by an endless conveyor component. The inkjet recording apparatus includes: a dummy ejection controller that dummy-ejects one of the ink and the reactive liquid onto a first position on the endless conveyor component and dummy-ejects the other of the reactive liquid and the ink onto a second position on the endless conveyor component where the one of the ink and the reactive liquid is not adherent; and a cleaning device that cleans the ink and the reactive liquid on the endless conveyor component.Type: ApplicationFiled: November 16, 2005Publication date: July 27, 2006Inventors: Tohru Mihara, Hiroaki Satoh, Naoki Morita, Koichi Saitoh, Takamaro Yamashita, Masao Mashima
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Publication number: 20040214428Abstract: Conductive layers are formed in the trenches made in an insulating film in the following manner. First, an amorphous silicon film 26A is deposited in the trenches 25 made in a silicon oxide film 24. A photoresist film 30 is then formed on the amorphous silicon film 26A by means of spin coating. Then, exposure light is applied to the entire surface of the photoresist film 30, thereby exposing to light those parts of the photoresist film 30 which lie outside the trenches 25. The other parts of the photoresist film 30, which lie in the trenches 25 are not exposed to light because the light reaching them is inadequate. Further, the photoresist film 30 is developed thereby removing those parts of the film 30 which lie outside the trenches 25 and which have been exposed to light. Thereafter, those parts of the amorphous silicon film 26A, which lie outside the trenches 25, are removed by means of dry etching using, as a mask, the unexposed parts of the photoresist film 30 which remain in the trenches 25.Type: ApplicationFiled: May 17, 2004Publication date: October 28, 2004Applicants: Renesas Technology Corporation, Hitachi ULSI Systems Co., Ltd.Inventors: Ryouichi Furukawa, Kazuyuki Suko, Masayuki Hiranuma, Koichi Saitoh, Hirohiko Yamamoto, Tadanori Yoshida, Masayuki Ishizaka, Maki Shimoda
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Patent number: 6770528Abstract: Conductive layers are formed in the trenches made in an insulating film in the following manner. First, an amorphous silicon film 26A is deposited in the trenches 25 made in a silicon oxide film 24. A photoresist film 30 is then formed on the amorphous silicon film 26A by means of spin coating. Then, exposure light is applied to the entire surface of the photoresist film 30, thereby exposing to light those parts of the photoresist film 30 which lie outside the trenches 25. The other parts of the photoresist film 30, which lie in the trenches 25 are not exposed to light because the light reaching them is inadequate. Further, the photoresist film 30 is developed thereby removing those parts of the film 30 which lie outside the trenches 25 and which have been exposed to light. Thereafter, those parts of the amorphous silicon film 26A, which lie outside the trenches 25, are removed by means of dry etching using, as a mask, the unexposed parts of the photoresist film 30 which remain in the trenches 25.Type: GrantFiled: February 19, 2003Date of Patent: August 3, 2004Assignees: Hitachi ULSI Systems Co., Ltd., Renesas Technology Corp.Inventors: Ryouichi Furukawa, Kazuyuki Suko, Masayuki Hiranuma, Koichi Saitoh, Hirohiko Yamamoto, Tadanori Yoshida, Masayuki Ishizaka, Maki Shimoda
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Patent number: 6659600Abstract: The present invention provides an inkjet recording head cartridge and an inkjet recording apparatus that have a simple structure and high reliability. Since individual flow passages in which ink emission orifices are formed are communicated directly with a rectangular ink supply chamber, it is prevented that a bubble of such a size as to cause printing defects rises through an ink supply chamber and blocks the individual flow passages. Also, since ink heated within the ink supply chamber is moved upward to the ink tank chamber by convection and grows an air lump sealed beforehand, it is prevented that a bubble will grow in the ink supply chamber. Furthermore, by allocating a large cross-sectional area to the ink supply chamber, it is prevented that meniscus oscillation of the ink emission orifices is amplified by pressure oscillation caused by ink emission and causes a printing defect. Therefore, reliable printing can be performed with a simple construction.Type: GrantFiled: May 23, 2001Date of Patent: December 9, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Kazuyuki Oda, Koji Ikegami, Tomoki Umezawa, Ichiro Tomikawa, Masaki Kataoka, Kenji Yamazaki, Norikuni Funatsu, Yoshihisa Ueda, Kohzo Hara, Takayuki Takeuchi, Kunihito Satou, Toshinobu Hamazaki, Koichi Saitoh
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Publication number: 20030148600Abstract: Conductive layers are formed in the trenches made in an insulating film in the following manner. First, an amorphous silicon film 26A is deposited in the trenches 25 made in a silicon oxide film 24. A photoresist film 30 is then formed on the amorphous silicon film 26A by means of spin coating. Then, exposure light is applied to the entire surface of the photoresist film 30, thereby exposing to light those parts of the photoresist film 30 which lie outside the trenches 25. The other parts of the photoresist film 30, which lie in the trenches 25 are not exposed to light because the light reaching them is inadequate. Further, the photoresist film 30 is developed thereby removing those parts of the film 30 which lie outside the trenches 25 and which have been exposed to light. Thereafter, those parts of the amorphous silicon film 26A, which lie outside the trenches 25, are removed by means of dry etching using, as a mask, the unexposed parts of the photoresist film 30 which remain in the trenches 25.Type: ApplicationFiled: February 19, 2003Publication date: August 7, 2003Applicant: Hitachi, Ltd.Inventors: Ryouichi Furukawa, Kazuyuki Suko, Masayuki Hiranuma, Koichi Saitoh, Hirohiko Yamamoto, Tadanori Yoshida, Masayuki Ishizaka, Maki Shimoda
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Patent number: 6444405Abstract: Conductive layers are formed in the trenches made in an insulating film in the following manner. First, an amorphous silicon film 26A is deposited in the trenches 25 made in a silicon oxide film 24. A photoresist film 30 is then formed on the amorphous silicon film 26A by means of spin coating. Then, exposure light is applied to the entire surface of the photoresist film 30, thereby exposing to light those parts of the photoresist film 30 which lie outside the trenches 25. The other parts of the photoresist film 30, which lie in the trenches 25 are not exposed to light because the light reaching them is inadequate. Further, the photoresist film 30 is developed thereby removing those parts of the film 30 which lie outside the trenches 25 and which have been exposed to light. Thereafter, those parts of the amorphous silicon film 26A, which lie outside the trenches 25, are removed by means of dry etching using, as a mask, the unexposed parts of the photoresist film 30 which remain in the trenches 25.Type: GrantFiled: June 30, 2000Date of Patent: September 3, 2002Assignees: Hitachi, Ltd., Hitachi Ulsi Systems Co., LTDInventors: Ryouichi Furukawa, Kazuyuki Suko, Masayuki Hiranuma, Koichi Saitoh, Hirohiko Yamamoto, Tadanori Yoshida, Masayuki Ishizaka, Maki Shimoda
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Publication number: 20020098678Abstract: Conductive layers are formed in the trenches made in an insulating film in the following manner. First, an amorphous silicon film 26A is deposited in the trenches 25 made in a silicon oxide film 24. A photoresist film 30 is then formed on the amorphous silicon film 26A by means of spin coating. Then, exposure light is applied to the entire surface of the photoresist film 30, thereby exposing to light those parts of the photoresist film 30 which lie outside the trenches 25. The other parts of the photoresist film 30, which lie in the trenches 25 are not exposed to light because the light reaching them is inadequate. Further, the photoresist film 30 is developed thereby removing those parts of the film 30 which lie outside the trenches 25 and which have been exposed to light. Thereafter, those parts of the amorphous silicon film 26A, which lie outside the trenches 25, are removed by means of dry etching using, as a mask, the unexposed parts of the photoresist film 30 which remain in the trenches 25.Type: ApplicationFiled: April 2, 2002Publication date: July 25, 2002Applicant: Hitachi, Ltd.Inventors: Ryouichi Furukawa, Kazuyuki Suko, Masayuki Hiranuma, Koichi Saitoh, Hirohiko Yamamoto, Tadanori Yoshida, Masayuki Ishizaka, Maki Shimoda
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Patent number: 6378994Abstract: The present invention provides a liquid jet printing head, a method of manufacturing the same, and a liquid jet printing apparatus, which allow stable, high speed, and continuous printing. A liquid jet printing head provides an inflow of liquid from an inlet to a common chamber, then along with the surface of heating elements of a heating element substrate and with a wall of a housing to separate channels. Liquid drops will be ejected by heating the heating elements. Since liquid may flow linearly from the inlet to the separate channels in accordance with the present invention, smooth flow promotes evacuation of bubbles through a nozzle, while cooling the heating element substrate with liquid flowing along with the substrate. The present invention provides thereby stable printing with high speed, continuous ejection (printing) of liquid drops.Type: GrantFiled: August 30, 2000Date of Patent: April 30, 2002Assignee: Fuji Xerox Co., Ltd.Inventors: Yoshihisa Ueda, Koji Ikegami, Masaki Kataoka, Kazuyuki Oda, Toshinobu Hamazaki, Koichi Saitoh, Kohzo Hara, Kenji Yamazaki, Norikuni Funatsu, Takayuki Takeuchi, Kunihito Satou, Ichiro Tomikawa, Tomoki Umezawa, Michiaki Murata
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Publication number: 20020027585Abstract: The present invention provides an inkjet recording head cartridge and an inkjet recording apparatus that have a simple structure and high reliability. Since individual flow passages in which ink emission orifices are formed are communicated directly with a rectangular ink supply chamber, it is prevented that a bubble of such a size as to cause printing defects rises through an ink supply chamber and blocks the individual flow passages. Also, since ink heated within the ink supply chamber is moved upward to the ink tank chamber by convection and grows an air lump sealed beforehand, it is prevented that a bubble will grow in the ink supply chamber. Furthermore, by allocating a large cross-sectional area to the ink supply chamber, it is prevented that meniscus oscillation of the ink emission orifices is amplified by pressure oscillation caused by ink emission and causes a printing defect. Therefore, reliable printing can be performed with a simple construction.Type: ApplicationFiled: May 23, 2001Publication date: March 7, 2002Applicant: Fuji Xerox Co., Ltd.Inventors: Kazuyuki Oda, Koji Ikegami, Tomoki Umezawa, Ichiro Tomikawa, Masaki Kataoka, Kenji Yamazaki, Norikuni Funatsu, Yoshihisa Ueda, Kohzo Hara, Takayuki Takeuchi, Kunihito Satou, Toshinobu Hamazaki, Koichi Saitoh