Patents by Inventor Yasushi Ohki
Yasushi Ohki 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: 7177578Abstract: There is provided a process for cleaning wherein a cleaning sheet fed through an image forming apparatus is heated and pressured by at least one of a fixing belt and a fixing roller, and the cleaning sheet removes stains, wherein the cleaning sheet has a support and a layer containing a thermoplastic resin over the support, and satisfies at least one of the following formulae: L1 (cm)>L2 (cm) and L1 (cm)>L3 (cm) wherein L1 is a length of the cleaning sheet in a direction of feeding the cleaning sheet, L2 a perimeter of the fixing roller, and L3 a perimeter of the fixing belt, and the process satisfies at least one of the following formulae: L2 (cm)>L4 (cm) and L3 (cm)>L4 (cm) wherein L4 represents a length of a smallest electrophotographic image-receiving sheet in a direction of feeding the electrophotographic image-receiving sheet.Type: GrantFiled: October 30, 2003Date of Patent: February 13, 2007Assignees: Fuji Photo Film Co., Ltd., Fuji Xerox Co., Ltd.Inventors: Yoshisada Nakamura, Yutaka Nogami, Yasushi Ohki
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Patent number: 7139522Abstract: Provided is an image forming apparatus, in which liable to produce remaining curl, highly effective curl correction is performed. The image forming apparatus includes: a roll receiving portion for receiving a continuous recording sheet wound into a roll shape; a sheet transporting portion for transporting the continuous recording sheet from the roll receiving portion; a cutting portion for cutting the continuous recording sheet sent out into a desired size; an image forming portion for forming a toner image on the recording sheet (which has been cut); a fixing portion for fixing the toner image to the recording sheet by heating the recording sheet on which the toner image is formed; a cooling portion for cooling the recording sheet to which the toner image has been fixed; and a curl correcting portion for correcting a curl of the recording sheet when the recording sheet is cooled.Type: GrantFiled: July 29, 2005Date of Patent: November 21, 2006Assignees: Fuji Xerox Co., Ltd., Fuji Photo Film Co., Ltd.Inventors: Yasushi Ohki, Yoshio Kanesawa, Yutaka Nogami, Yoshisada Nakamura, Tadakazu Edure
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Publication number: 20050276642Abstract: Provided is an image forming apparatus, in which liable to produce remaining curl, highly effective curl correction is performed. The image forming apparatus includes: a roll receiving portion for receiving a continuous recording sheet wound into a roll shape; a sheet transporting portion for transporting the continuous recording sheet from the roll receiving portion; a cutting portion for cutting the continuous recording sheet sent out into a desired size; an image forming portion for forming a toner image on the recording sheet (which has been cut); a fixing portion for fixing the toner image to the recording sheet by heating the recording sheet on which the toner image is formed; a cooling portion for cooling the recording sheet to which the toner image has been fixed; and a curl correcting portion for correcting a curl of the recording sheet when the recording sheet is cooled.Type: ApplicationFiled: July 29, 2005Publication date: December 15, 2005Applicants: Fuji Xerox Co., Ltd., Fuji Photo Film Co., Ltd.Inventors: Yasushi Ohki, Yoshio Kanesawa, Yutaka Nogami, Yoshisada Nakamura, Tadakazu Edure
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Patent number: 6934507Abstract: Provided is an image forming apparatus, in which liable to produce remaining curl, highly effective curl correction is performed. The image forming apparatus includes: a roll receiving portion for receiving a continuous recording sheet wound into a roll shape; a sheet transporting portion for transporting the continuous recording sheet from the roll receiving portion; a cutting portion for cutting the continuous recording sheet sent out into a desired size; an image forming portion for forming a toner image on the recording sheet (which has been cut); a fixing portion for fixing the toner image to the recording sheet by heating the recording sheet on which the toner image is formed; a cooling portion for cooling the recording sheet to which the toner image has been fixed; and a curl correcting portion for correcting a curl of the recording sheet when the recording sheet is cooled.Type: GrantFiled: December 1, 2003Date of Patent: August 23, 2005Assignees: Fuji Xerox Co., Ltd., Fuji Photo Film Co., Ltd.Inventors: Yasushi Ohki, Yoshio Kanesawa, Yutaka Nogami, Yoshisada Nakamura, Tadakazu Edure
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Publication number: 20040131406Abstract: Provided is an image forming apparatus, in which liable to produce remaining curl, highly effective curl correction is performed.Type: ApplicationFiled: December 1, 2003Publication date: July 8, 2004Applicants: FUJI XEROX CO., LTD., FUJI PHOTO FILM CO., LTD.Inventors: Yasushi Ohki, Yoshio Kanesawa, Yutaka Nogami, Yoshisada Nakamura, Tadakazu Edure
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Publication number: 20040091295Abstract: Provided are processes for cleaning which ensure easy cleaning of at least one of a fixing roller and a fixing belt in an electrophotographic apparatus, and image forming apparatuses which employ such processes. To achieve this, an electrophotographic image-receiving sheet which has a support and a toner image-receiving layer containing a thermoplastic resin on the support, and the length of which in the direction of feeding (L1) is longer than at least one of the perimeter of the fixing roller (L2) and the perimeter of the fixing belt (L3), both of which are the heating and pressuring means of the image forming apparatus, is used as a cleaning sheet.Type: ApplicationFiled: October 30, 2003Publication date: May 13, 2004Applicants: FUJI PHOTO FILM CO., LTD., FUJI XEROX CO., LTD.Inventors: Yoshisada Nakamura, Yutaka Nogami, Yasushi Ohki
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Patent number: 4936948Abstract: The present invention relates to a method for producing a light sensitive body for use in electronic photography copiers and printers, wherein the surface of a substrate comprising aluminum as the main constituent is made flat and smooth by mechanical processing, subjected to further etching treatment, and a light sensitive layer is formed thereon. This light sensitive body is used in connection with an optical toner concentration sensor. This toner concentration sensor, along with a toner concentration controlling mechanism, will enable copied picture images to have constant image concentration without the occurrence of base fog.Type: GrantFiled: September 13, 1989Date of Patent: June 26, 1990Assignee: Fuji Electric Co., Ltd.Inventors: Yasushi Ohki, Toshinao Ishizone