Patents by Inventor Susumu Hirakata
Susumu Hirakata 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: 9643412Abstract: An ejection apparatus is provided with a plurality of ejection units, a controller that controls a temperature of a liquid, and a supply mechanism that includes a plurality of supply units. The plurality of supply units flow the liquid in a predetermined flow direction. Respective portion of the plurality of supply units in the flow direction are connected to the ejection units to supply the liquid to the ejection units. A downstream side portion of one of the supply units in the flow direction is connected to another one of supply units via a heat transfer member.Type: GrantFiled: August 16, 2016Date of Patent: May 9, 2017Assignee: Fuji Xerox Co., Ltd.Inventors: Norihisa Takemoto, Atsushi Murakami, Manabu Numata, Hiroshi Ikeda, Susumu Hirakata
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Patent number: 8176630Abstract: A liquid droplet ejection head includes: a nozzle plate that has a plurality of nozzles ejecting a liquid droplet; a flow path member that includes: pressure generating chambers that communicate with the nozzles; and liquid supply paths through which liquid is supplied to the pressure generating chambers; and a damper portion that is disposed in at least one part of a region, the region being on the nozzle plate, corresponding to the liquid supply paths, the damper portion reducing a fluctuation of an ejection amount of the liquid droplets to enable stable ejection.Type: GrantFiled: June 15, 2010Date of Patent: May 15, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Masaki Kataoka, Hideki Fukunaga, Hiroshi Inoue, Yuji Nishimura, Susumu Hirakata, Atsumichi Imazeki
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Patent number: 8141973Abstract: A liquid droplet ejection head comprises an ejector, a liquid viscosity-increase prevention structure and a liquid viscosity-increase prevention controller. The ejector includes a nozzle for ejecting a liquid droplet, a pressure chamber communicating with the nozzle through a communication path, and an actuator for applying pressure to a liquid in the pressure chamber. The liquid viscosity-increase prevention structure prevents an increase of viscosity of the liquid in the ejector. The liquid viscosity-increase prevention controller changes the operation frequency of the liquid viscosity-increase prevention structure between when the liquid droplet is ejected from the nozzle and when ejection of the liquid droplet is paused and no liquid droplet is being ejected from the nozzle.Type: GrantFiled: May 16, 2008Date of Patent: March 27, 2012Assignee: Fuji Xerox Co., Ltd.Inventors: Toshinobu Hamazaki, Susumu Hirakata
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Publication number: 20100252528Abstract: A liquid droplet ejection head includes: a nozzle plate that has a plurality of nozzles ejecting a liquid droplet; a flow path member that includes: pressure generating chambers that communicate with the nozzles; and liquid supply paths through which liquid is supplied to the pressure generating chambers; and a damper portion that is disposed in at least one part of a region, the region being on the nozzle plate, corresponding to the liquid supply paths, the damper portion reducing a fluctuation of an ejection amount of the liquid droplets to enable stable ejection.Type: ApplicationFiled: June 15, 2010Publication date: October 7, 2010Applicant: FUJI XEROX CO., LTD.Inventors: Masaki Kataoka, Hideki Fukunaga, Hiroshi Inoue, Yuji Nishimura, Susumu Hirakata, Atsumichi Imazeki
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Patent number: 7798628Abstract: A liquid droplet ejection head includes: a nozzle plate that has a plurality of nozzles ejecting a liquid droplet; a flow path member that includes: pressure generating chambers that communicate with the nozzles; and liquid supply paths through which liquid is supplied to the pressure generating chambers; and a damper portion that is disposed in at least one part of a region, the region being on the nozzle plate, corresponding to the liquid supply paths, the damper portion reducing a fluctuation of an ejection amount of the liquid droplets to enable stable ejection.Type: GrantFiled: February 7, 2007Date of Patent: September 21, 2010Assignee: Fuji Xerox Co., Ltd.Inventors: Masaki Kataoka, Hideki Fukunaga, Hiroshi Inoue, Yuji Nishimura, Susumu Hirakata, Atsumichi Imazeki
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Publication number: 20090160887Abstract: A liquid droplet ejection head comprises an ejector, a liquid viscosity-increase prevention structure and a liquid viscosity-increase prevention controller. The ejector includes a nozzle for ejecting a liquid droplet, a pressure chamber communicating with the nozzle through a communication path, and an actuator for applying pressure to a liquid in the pressure chamber. The liquid viscosity-increase prevention structure prevents an increase of viscosity of the liquid in the ejector. The liquid viscosity-increase prevention controller changes the operation frequency of the liquid viscosity-increase prevention structure between when the liquid droplet is ejected from the nozzle and when ejection of the liquid droplet is paused and no liquid droplet is being ejected from the nozzle.Type: ApplicationFiled: May 16, 2008Publication date: June 25, 2009Applicant: FUJI XEROX CO., LTD.Inventors: Toshinobu Hamazaki, Susumu Hirakata
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Publication number: 20080049085Abstract: A liquid droplet ejection head includes: a nozzle plate that has a plurality of nozzles ejecting a liquid droplet; a flow path member that includes pressure generating chambers that communicate with the nozzles; and liquid supply paths through which liquid is supplied to the pressure generating chambers; and a damper portion that is disposed in at least one part of a region, the region being on the nozzle plate, corresponding to the liquid supply paths, the damper portion reducing a fluctuation of an ejection amount of the liquid droplets to enable stable ejection.Type: ApplicationFiled: February 7, 2007Publication date: February 28, 2008Inventors: Masaki Kataoka, Hideki Fukunaga, Hiroshi Inoue, Yuji Nishimura, Susumu Hirakata, Atsumichi Imazeki
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Patent number: 7246874Abstract: The present invention provides a maintenance device which can suction ink in a short period of time and with a small amount of consumed ink. The maintenance device has a plurality of capping portions disposed so as to face a plurality of unit heads which can discharge liquid drops onto a recording medium; a plurality of small chambers communicating with the plurality of capping portions, respectively; a suction portion suctioning interiors of the small chambers; and a plurality of valve mechanisms independently controlling airtight states of the interiors of the small chambers. The present invention also provides a recording device equipped with this maintenance device.Type: GrantFiled: July 16, 2004Date of Patent: July 24, 2007Assignee: Fuji Xerox Co., Ltd.Inventors: Susumu Hirakata, Yoshihira Rai, Nobuhiro Katsuta, Hiroaki Satoh
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Publication number: 20050057603Abstract: The present invention provides a maintenance device which can suction ink in a short period of time and with a small amount of consumed ink. The maintenance device has a plurality of capping portions disposed so as to face a plurality of unit heads which can discharge liquid drops onto a recording medium; a plurality of small chambers communicating with the plurality of capping portions, respectively; a suction portion suctioning interiors of the small chambers; and a plurality of valve mechanisms independently controlling airtight states of the interiors of the small chambers. The present invention also provides a recording device equipped with this maintenance device.Type: ApplicationFiled: July 16, 2004Publication date: March 17, 2005Inventors: Susumu Hirakata, Yoshihira Rai, Nobuhiro Katsuta, Hiroaki Satoh
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Patent number: 6578947Abstract: The present invention provides an ink drying prevention apparatus that can prevent ink within an ink-jet recording head from drying, for a long period of time. The ink drying prevention apparatus prevents ink within an ink-jet recording head from drying, and includes a porous substance permeated with a seal liquid that is nonvolatile and incompatible with the ink within the head, wherein the porous substance can contact a nozzle surface of the ink-jet recording head. The seal liquid forms plural meniscuses in an interface with the nozzle surface and inside the porous substance to block air paths, thereby preventing ink within a nozzle exposed to the nozzle surface from drying.Type: GrantFiled: November 27, 2000Date of Patent: June 17, 2003Assignee: Fuji Xerox Co., Ltd.Inventors: Yasufumi Suwabe, Susumu Hirakata, Satoshi Mohri, Yuji Suemitsu, Hiroaki Satoh
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Patent number: 5764267Abstract: A conduction recording head forms an image on a recording sheet by connecting return path electrodes and recording electrodes conductively through a printing and recording medium. Recording electrodes, a drive circuit and connector electrodes are all disposed integrally on a flexible insulating film as a main head part which is disposed on a rigid support member through an elastic member.Type: GrantFiled: May 17, 1996Date of Patent: June 9, 1998Assignee: Fuji Xerox Co., Ltd.Inventors: Eiichi Akutsu, Hiroh Soga, Shigehito Ando, Susumu Hirakata
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Patent number: 5598195Abstract: The present invention provides an electrostatic attracting-type ink jet recording method by which an ink dot which has adhered to the recording medium or intermediate recording material can be prevented from affecting the drawing direction of the subsequently jetting ink, whereby an ink can be invariably allowed to jet onto a proper position to form an image with a high quality.Type: GrantFiled: June 21, 1994Date of Patent: January 28, 1997Assignee: Fuji Xerox Co., Ltd.Inventors: Toru Okamoto, Susumu Hirakata
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Patent number: 5466654Abstract: A display medium is disclosed, comprising at least the following layers, in this order: a heating resistive layer, a conductive layer, a background layer and an erasable thermochromic layer, and comprising a heating resistive layer which may comprise at least two layers. The display medium may also comprise a contact resistance reducing layer on the heating resistive layer and a protective layer on the erasable thermochromic layer.Type: GrantFiled: August 3, 1994Date of Patent: November 14, 1995Assignee: Fuji Xerox Co., Ltd.Inventors: Eiichi Akutsu, Hiroh Soga, Shigehito Ando, Susumu Hirakata, Kazuo Maruyama
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Patent number: 5387460Abstract: A thermal printing ink medium which electrically generates heat to transfer an ink thereof to a transfer material to form an image thereon is disclosed, which comprises a first heating element layer, a second heating element layer in contact with said first heating element layer, said second heating element layer having a greater volume resistivity than said first heating element layer, a conductive layer in contact with said second heating element layer, an ink layer provided on the side of said conductive layer opposite to said second heating element layer, and an adhesion-improving layer formed on the interface between said conductive layer and second heating element layer by the interaction therebetween so as to have a given volume resistivity.Type: GrantFiled: October 13, 1992Date of Patent: February 7, 1995Assignee: Fuji Xerox Co., Ltd.Inventors: Susumu Hirakata, Eiichi Akutsu, Toru Okamoto, Hiroh Soga, Shigehito Ando