Patents by Inventor Tsuneo Maki
Tsuneo Maki 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: 9597889Abstract: A liquid heating apparatus for heating a liquid that is supplied to a liquid droplet ejection head is provided. The liquid heating apparatus includes a liquid chamber unit configured to be disposed on the supply route of the liquid and to temporarily store the liquid, and a temperature-adjusting flow path unit configured to heat the liquid supplied from the liquid chamber unit.Type: GrantFiled: February 11, 2016Date of Patent: March 21, 2017Assignee: RICOH COMPANY, LTD.Inventors: Takeshi Shimizu, Tsuneo Maki
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Publication number: 20160271964Abstract: A liquid heating apparatus for heating a liquid that is supplied to a liquid droplet ejection head is provided. The liquid heating apparatus includes a liquid chamber unit configured to be disposed on the supply route of the liquid and to temporarily store the liquid, and a temperature-adjusting flow path unit configured to heat the liquid supplied from the liquid chamber unit.Type: ApplicationFiled: February 11, 2016Publication date: September 22, 2016Applicant: RICOH COMPANY, LTD.Inventors: Takeshi Shimizu, Tsuneo Maki
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Patent number: 7623816Abstract: In an intermediate transfer part (100), a bead 107 is formed on an inner side of an intermediate transfer belt (102), which is rotated by an intermediate transfer belt drive roller (101). Driven roller bearings (104a, 104b) support an intermediate transfer belt driven roller (103). The intermediate transfer belt driven roller (103) is movable in a thrust direction. Ends of the intermediate transfer belt driven roller (101) and the intermediate transfer belt driven roller (103) interfere with a bead (107) so as to restrict a deflection of the intermediate transfer belt in the thrust direction. The intermediate transfer belt driven roller (103) is movable in the thrust direction against a deflection of the intermediate transfer belt (102).Type: GrantFiled: September 15, 2004Date of Patent: November 24, 2009Assignee: Ricoh Company, Ltd.Inventors: Tsuneo Maki, Tomiyoshi Misumi, Kiyoshi Tsukamura, Yohichi Itoh, Hideo Aoki
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Patent number: 7591458Abstract: A sheet conveyance apparatus can convey a recording paper (12) in a stable condition irrespective of a kind of the material of the recording paper (12). The sheet conveyance apparatus conveys a recording sheet (12) by attaching the recording paper (12) onto an endless conveyance belt (21) by applying electric charges onto a surface of the conveyance belt (21). A charger (26, 83) charges the surface of the conveyance belt (21) in a belt-like alternate voltage pattern (91). A control part (73) controls a charge width (L) of the alternate voltage pattern (91) in a direction of conveyance of the recording paper (12).Type: GrantFiled: January 23, 2004Date of Patent: September 22, 2009Assignee: Ricoh Company, Ltd.Inventor: Tsuneo Maki
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Patent number: 7475958Abstract: An image forming device comprises a carriage on which a printing head is carried, a plurality of nozzles each discharging a droplet of printing liquid being arrayed in the printing head. A main scanning of the carriage to a sheet is performed and the sheet is fed intermittently so that an image is formed on the sheet. When a continuous printing of images to sheets is performed and quality of an image formed on a following sheet is the same as quality of an image formed on a preceding sheet, the image formation to a preceding-sheet rear edge and a following-sheet front edge is performed by a same main scanning. When the following-sheet image quality differs from the preceding-sheet image quality, the image formation to the following sheet is performed after the image formation to the preceding-sheet rear edge is completed.Type: GrantFiled: February 22, 2006Date of Patent: January 13, 2009Assignee: Ricoh Company, LtdInventor: Tsuneo Maki
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Publication number: 20080150993Abstract: An image forming device comprises a carriage on which a printing head is carried, a plurality of nozzles each discharging a droplet of printing liquid being arrayed in the printing head. A main scanning of the carriage to a sheet is performed and the sheet is fed intermittently so that an image is formed on the sheet. When a continuous printing of images to sheets is performed and quality of an image formed on a following sheet is the same as quality of an image formed on a preceding sheet, the image formation to a preceding-sheet rear edge and a following-sheet front edge is performed by a same main scanning. When the following-sheet image quality differs from the preceding-sheet image quality, the image formation to the following sheet is performed after the image formation to the preceding-sheet rear edge is completed.Type: ApplicationFiled: February 22, 2006Publication date: June 26, 2008Inventor: Tsuneo Maki
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Patent number: 7364253Abstract: A liquid drop jet head includes a nozzle jetting a liquid drop, a liquid room connected to the nozzle, a common liquid room connected to the liquid room, a supply opening part supplying the liquid to the common liquid room, and a pressure generating part generating a pressure which pressurizes the liquid provided in the liquid room, wherein the common liquid room has a configuration in which a width of the common liquid room on a plane level is narrower as a point of the width is more remote from the supply opening part.Type: GrantFiled: May 23, 2005Date of Patent: April 29, 2008Assignee: Ricoh Company, Ltd.Inventors: Kenichiro Hashimoto, Mitsumi Fujii, Tomomi Katoh, Tsuneo Maki, Kiyoshi Yamaguchi
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Publication number: 20070272512Abstract: A belt conveyor apparatus and an image formation apparatus therewith are disclosed. The belt conveyor apparatus includes a conveyance belt installed between a driving roller and a follower roller, the conveyance belt being rotationally movable. The position of the conveyance belt in the roller axle direction is regulated by a bead attached to the conveyance belt, and an edge or a slot provided on the driving roller. When the conveyance belt is rotationally moving, the follower roller can move in the thrust direction of the follower roller. The movable amount of the follower roller is made less than the clearance between the bead and the follower roller.Type: ApplicationFiled: May 26, 2005Publication date: November 29, 2007Inventor: Tsuneo Maki
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Patent number: 7264347Abstract: This recording-medium conveying device comprises a conveying belt, the conveying belt, a belt charging unit, and a pressing roller. The conveying belt is wound around a driving roller and a driven roller so as to convey a recording medium to an image recording part. The conveying belt includes an insulating layer formed at one side contacting the recording medium. The belt charging unit is provided in contact with the insulating layer so as to charge the insulating layer with a positive charge and a negative charge alternately in a moving direction of the conveying belt by applying an AC bias to the conveying belt. The pressing roller presses the conveying belt against the driving roller so as to prevent the conveying belt from slipping on the driving roller.Type: GrantFiled: July 19, 2004Date of Patent: September 4, 2007Assignee: Ricoh Company, Ltd.Inventors: Tsuneo Maki, Kazunori Bannai
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Publication number: 20060233578Abstract: In an intermediate transfer part (100), a bead 107 is formed on an inner side of an intermediate transfer belt (102), which is rotated by an intermediate transfer belt drive roller (101). Driven roller bearings (104a, 104b) support an intermediate transfer belt driven roller (103). The intermediate transfer belt driven roller (103) is movable in a thrust direction. Ends of the intermediate transfer belt driven roller (101) and the intermediate transfer belt driven roller (103) interfere with a bead (107) so as to restrict a deflection of the intermediate transfer belt in the thrust direction. The intermediate transfer belt driven roller (103) is movable in the thrust direction against a deflection of the intermediate transfer belt (102).Type: ApplicationFiled: September 15, 2004Publication date: October 19, 2006Inventors: Tsuneo Maki, Tomiyoshi Misumi, Kiyoshi Tsukamura, Yohichi Itoh, Hideo Aoki
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Publication number: 20060033968Abstract: A sheet conveyance apparatus can convey a recording paper (12) in a stable condition irrespective of a kind of the material of the recording paper (12). The sheet conveyance apparatus conveys a recording sheet (12) by attaching the recording paper (12) onto an endless conveyance belt (21) by applying electric charges onto a surface of the conveyance belt (21). A charger (26, 83) charges the surface of the conveyance belt (21) in a belt-like alternate voltage pattern (91). A control part (73) controls a charge width (L) of the alternate voltage pattern (91) in a direction of conveyance of the recording paper (12).Type: ApplicationFiled: January 23, 2004Publication date: February 16, 2006Inventor: Tsuneo Maki
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Publication number: 20050219321Abstract: A liquid drop jet head includes a nozzle jetting a liquid drop, a liquid room connected to the nozzle, a common liquid room connected to the liquid room, a supply opening part supplying the liquid to the common liquid room, and a pressure generating part generating a pressure which pressurizes the liquid provided in the liquid room, wherein the common liquid room has a configuration in which a width of the common liquid room on a plane level is narrower as a point of the width is more remote from the supply opening part.Type: ApplicationFiled: May 23, 2005Publication date: October 6, 2005Inventors: Kenichiro Hashimoto, Mitsumi Fujii, Tomomi Katoh, Tsuneo Maki, Kiyoshi Yamaguchi
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Patent number: 6913348Abstract: A liquid drop jet head includes a nozzle jetting a liquid drop, a liquid room connected to the nozzle, a common liquid room connected to the liquid room, a supply opening part supplying the liquid to the common liquid room, and a pressure generating part generating a pressure which pressurizes the liquid provided in the liquid room, wherein the common liquid room has a configuration in which a width of the common liquid room on a plane level is narrower as a point of the width is more remote from the supply opening part.Type: GrantFiled: November 25, 2003Date of Patent: July 5, 2005Assignee: Ricoh Company, Ltd.Inventors: Kenichiro Hashimoto, Mitsumi Fujii, Tomomi Katoh, Tsuneo Maki, Kiyoshi Yamaguchi
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Publication number: 20040263603Abstract: This recording-medium conveying device comprises a conveying belt, the conveying belt, a belt charging unit, and a pressing roller. The conveying belt is wound around a driving roller and a driven roller so as to convey a recording medium to an image recording part. The conveying belt includes an insulating layer formed at one side contacting the recording medium. The belt charging unit is provided in contact with the insulating layer so as to charge the insulating layer with a positive charge and a negative charge alternately in a moving direction of the conveying belt by applying an AC bias to the conveying belt. The pressing roller presses the conveying belt against the driving roller so as to prevent the conveying belt from slipping on the driving roller.Type: ApplicationFiled: July 19, 2004Publication date: December 30, 2004Inventors: Tsuneo Maki, Kazunori Bannai
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Patent number: 6786590Abstract: This recording-medium conveying device comprises a conveying belt, the conveying belt, a belt charging unit, and a pressing roller. The conveying belt is wound around a driving roller and a driven roller so as to convey a recording medium to an image recording part. The conveying belt includes an insulating layer formed at one side contacting the recording medium. The belt charging unit is provided in contact with the insulating layer so as to charge the insulating layer with a positive charge and a negative charge alternately in a moving direction of the conveying belt by applying an AC bias to the conveying belt. The pressing roller presses the conveying belt against the driving roller so as to prevent the conveying belt from slipping on the driving roller.Type: GrantFiled: March 7, 2002Date of Patent: September 7, 2004Assignee: Ricoh Company, Ltd.Inventors: Tsuneo Maki, Kazunori Bannai
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Publication number: 20040104985Abstract: A liquid drop jet head includes a nozzle jetting a liquid drop, a liquid room connected to the nozzle, a common liquid room connected to the liquid room, a supply opening part supplying the liquid to the common liquid room, and a pressure generating part generating a pressure which pressurizes the liquid provided in the liquid room, wherein the common liquid room has a configuration in which a width of the common liquid room on a plane level is narrower as a point of the width is more remote from the supply opening part.Type: ApplicationFiled: November 25, 2003Publication date: June 3, 2004Inventors: Kenichiro Hashimoto, Mitsumi Fujii, Tomomi Katoh, Tsuneo Maki, Kiyoshi Yamaguchi
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Patent number: 6682185Abstract: A liquid drop jet head includes a nozzle jetting a liquid drop, a liquid room connected to the nozzle, a common liquid room connected to the liquid room, a supply opening part supplying the liquid to the common liquid room, and a pressure generating part generating a pressure which pressurizes the liquid provided in the liquid room, wherein the common liquid room has a configuration in which a width of the common liquid room on a plane level is narrower as a point of the width is more remote from the supply opening part.Type: GrantFiled: March 20, 2002Date of Patent: January 27, 2004Assignee: Ricoh Company, Ltd.Inventors: Kenichiro Hashimoto, Mitsumi Fujii, Tomomi Katoh, Tsuneo Maki, Kiyoshi Yamaguchi
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Publication number: 20020175980Abstract: A liquid drop jet head includes a nozzle jetting a liquid drop, a liquid room connected to the nozzle, a common liquid room connected to the liquid room, a supply opening part supplying the liquid to the common liquid room, and a pressure generating part generating a pressure which pressurizes the liquid provided in the liquid room, wherein the common liquid room has a configuration in which a width of the common liquid room on a plane level is narrower as a point of the width is more remote from the supply opening part.Type: ApplicationFiled: March 20, 2002Publication date: November 28, 2002Inventors: Kenichiro Hashimoto, Mitsumi Fujii, Tomomi Katoh, Tsuneo Maki, Kiyoshi Yamaguchi
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Publication number: 20020126193Abstract: This recording-medium conveying device comprises a conveying belt, the conveying belt, a belt charging unit, and a pressing roller. The conveying belt is wound around a driving roller and a driven roller so as to convey a recording medium to an image recording part. The conveying belt includes an insulating layer formed at one side contacting the recording medium. The belt charging unit is provided in contact with the insulating layer so as to charge the insulating layer with a positive charge and a negative charge alternately in a moving direction of the conveying belt by applying an AC bias to the conveying belt. The pressing roller presses the conveying belt against the driving roller so as to prevent the conveying belt from slipping on the driving roller.Type: ApplicationFiled: March 7, 2002Publication date: September 12, 2002Inventors: Tsuneo Maki, Kazunori Bannai