Patents by Inventor Keyaki Yogome
Keyaki Yogome 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: 8265503Abstract: Provided is a liquid developer concentration adjusting apparatus and a method so that the concentration can be adjusted easily and efficiently without using time and effort in liquid volume control. Further, the apparatus and method enable the concentration adjustment to be efficiently accomplished in a short period of time with reduced volume of required supply developer to be added for the adjustment independently of the initial concentration of the developer by concurrently measuring the concentration of developer, even if the concentration thereof is high. In the control of the concentration adjustment, the developer is allowed to overflow through an opening of the concentration adjusting container, and the concentration adjustment by using supply developer or the supply speed of the supply developer is started before the start of the overflow.Type: GrantFiled: June 11, 2008Date of Patent: September 11, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventor: Keyaki Yogome
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Patent number: 8121504Abstract: Provided are an apparatus and method for measuring the concentration of liquid developer, and an apparatus and method for controlling the concentration of liquid developer in which the concentration of a highly concentrated developer is easily and accurately measured or controlled without controlling the liquid amount. An opening is provided in the developer container for concentration measurement in which a liquid developer for concentration measurement is stored and stirred for concentration measurement. The developer container for concentration measurement is configured such that the stored liquid developer for concentration measurement overflows through the opening at the time of stirring.Type: GrantFiled: February 20, 2008Date of Patent: February 21, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Hiroaki Umemoto, Keyaki Yogome
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Patent number: 8119318Abstract: To provide a wet developer which is capable of improving fixability, while ensuring a sufficient heat-resistant storage property. The wet developer contains toner particles composed of a colorant and a binder resin, which are dispersed in a non-volatile carrier solution by using a dispersant. As the binder resin, a polyester resin, which has an alcohol component containing a mixture of an ethylene oxide adduct of bisphenol A and a propylene oxide adduct of bisphenol A, with a ratio thereof being 1:19 to 10:10 (weight ratio), is used.Type: GrantFiled: March 31, 2009Date of Patent: February 21, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Naoki Yoshie, Keyaki Yogome, Chiaki Yamada
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Patent number: 7729626Abstract: In order to conform a specific correction table to the characteristics of a liquid developer to be used, the specific correction table is created by calibrating a standard correction table stored in advance by using a viscosity property value of a liquid developer for calibration at a current temperature. A concentration adjustment is performed by comparing a measured viscosity property value with a target viscosity property value which is temperature-corrected based on the specific correction table. Further, the viscosity property value of a liquid developer is detected by measuring the current of a motor for stirring the liquid developer, where a no-load stirring current value is measured in the absence of a liquid developer, and one or both of a measured current value and target current value is corrected based thereon.Type: GrantFiled: June 23, 2008Date of Patent: June 1, 2010Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yuji Kamoda, Keyaki Yogome, Hiroaki Umemoto
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Method for producing resin-molded substrate and method for producing reversible image display medium
Patent number: 7604706Abstract: An initial resin substrate is formed by laminating resin layers, and one surface of the initial substrate is heated and pressed by a molding die to mold a projected and dented surface such that substantially no deformation occurs on the resin layer providing a surface opposed to the one surface of the initial substrate. A reversible image display medium is produced by a method comprising the steps of accommodating a dry developer into the concavities and fixing a second substrate to the first substrate using an adhesive. Alternatively a reversible image display medium may be produced by, e.g.Type: GrantFiled: March 29, 2002Date of Patent: October 20, 2009Assignee: Minolta Co., Ltd.Inventors: Kenji Otokawa, Denji Nota, Akihito Ikegawa, Keyaki Yogome, Takaji Kurita -
Publication number: 20090253067Abstract: To provide a wet developer which is capable of improving fixability, while ensuring a sufficient heat-resistant storage property. The wet developer contains toner particles composed of a colorant and a binder resin, which are dispersed in a non-volatile carrier solution by using a dispersant. As the binder resin, a polyester resin, which has an alcohol component containing a mixture of an ethylene oxide adduct of bisphenol A and a propylene oxide adduct of bisphenol A, with a ratio thereof being 1:19 to 10:10 (weight ratio), is used.Type: ApplicationFiled: March 31, 2009Publication date: October 8, 2009Applicant: Konica Minolta Business Technologies, Inc.Inventors: Naoki YOSHIE, Keyaki YOGOME, Chiaki YAMADA
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Publication number: 20090148785Abstract: The present invention relates to a wet developer comprising: a carrier solution; toner particles dispersed in the carrier solution; and a dispersing agent for dispersing the toner particles in the carrier solution, wherein a change in loss elastic modulus in response to a temperature rise of the wet developer has a peak, and a fixing method for fixing images of toner on a recording material, comprising: developing electrostatic latent images to form toner images with a wet developer containing a carrier solution, toner particles dispersed in the carrier solution, and a dispersing agent for dispersing the toner particles in the carrier solution, the wet developer having a peak in a change in loss elastic modulus in response to a temperature rise of the wet developer; transferring the toner images on the recording material; and fixing the transferred toner images by heat.Type: ApplicationFiled: December 3, 2008Publication date: June 11, 2009Inventor: Keyaki Yogome
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Publication number: 20080317490Abstract: Provided is a liquid developer concentration adjusting apparatus and a method thereof, wherein the concentration can be adjusted easily and efficiently without using time and effort in liquid volume control. Further, the apparatus and method enable the concentration adjustment to be efficiently accomplished in a short period of time with reduced volume of required supply developer to be added for the adjustment independently of the initial concentration of the developer by concurrently measuring the concentration of developer, even if the concentration thereof is high. In the control of the concentration adjustment, the developer is allowed to overflow through an opening of the concentration adjusting container, and the concentration adjustment by using supply developer or the supply speed thereof is started before the start of the overflow.Type: ApplicationFiled: June 11, 2008Publication date: December 25, 2008Inventor: Keyaki Yogome
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Publication number: 20080317489Abstract: In order to conform a specific correction table to the characteristics of a liquid developer to be used, the specific correction table is created by calibrating a standard correction table stored in advance by using a viscosity property value of a liquid developer for calibration at a current temperature. A concentration adjustment is performed by comparing a measured viscosity property value with a target viscosity property value which is temperature-corrected based on the specific correction table. Further, the viscosity property value of a liquid developer is detected by measuring the current of a motor for stirring the liquid developer, where a no-load stirring current value is measured in the absence of a liquid developer, and one or both of a measured current value and target current value is corrected based thereon.Type: ApplicationFiled: June 23, 2008Publication date: December 25, 2008Inventors: Yuji Kamoda, Keyaki Yogome, Hiroaki Umemoto
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Patent number: 7436379Abstract: Disclosed is a reversible image display medium which can be repeatedly used and can display high quality images, in which cells between the two substrates accommodate a dry developer containing at least two kinds of frictionally chargeable dry developing particles having different chargeable polarities and different optical reflection densities; images are displayed by forming an electrostatic latent image corresponding to the image to be formed on one of the two substrates to drive the developing particles in an electrostatic field based on the electrostatic latent image; a developer-facing surface of one of the substrates has a surface resistivity of at least 1×1012 ohm/square; a developer-facing surface of the opposite substrate has a surface resistivity from 1×106 ohm/square to 1×1012 ohm/square; a developer-facing surface of one of the substrates has a surface average median roughness Ra of 0.2 ?m to 0.Type: GrantFiled: May 16, 2005Date of Patent: October 14, 2008Assignee: Minolta Co., Ltd.Inventors: Masahiko Matsuura, Hiroshi Mizuno, Akihito Ikegawa, Masaharu Kanazawa, Keyaki Yogome, Takaji Kurita
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Publication number: 20080205921Abstract: Provided are an apparatus and method for measuring the concentration of liquid developer, and an apparatus and method for controlling the concentration of liquid developer in which the concentration of a highly concentrated developer is easily and accurately measured or controlled without controlling the liquid amount. An opening is provided in the developer container for concentration measurement in which a liquid developer for concentration measurement is stored and stirred for concentration measurement. The developer container for concentration measurement is configured such that the stored liquid developer for concentration measurement overflows through the opening at the time of stirring.Type: ApplicationFiled: February 20, 2008Publication date: August 28, 2008Inventors: Hiroaki Umemoto, Keyaki Yogome
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Method for producing resin-molded substrate and method for producing reversible image display medium
Publication number: 20080018021Abstract: An initial resin substrate is formed by laminating resin layers, and one surface of the initial substrate is heated and pressed by a molding die to mold a projected and dented surface such that substantially no deformation occurs on the resin layer providing a surface opposed to the one surface of the initial substrate. A reversible image display medium is produced by a method comprising the steps of accommodating a dry developer into the concavities and fixing a second substrate to the first substrate using an adhesive. Alternatively a reversible image display medium may be produced by, e.g.Type: ApplicationFiled: September 20, 2007Publication date: January 24, 2008Applicant: MINOLTA CO., LTD.Inventors: Kenji OTOKAWA, Denji Nota, Akihito IKEGAWA, Keyaki YOGOME, Takaji KUBITA -
Patent number: 7239818Abstract: An image forming apparatus including first and second image forming portions, and a device for detecting a type of an image display medium, image formation by the first image forming portion being allowed when the medium type is a normal image display medium (PP), and image formation by the second image forming portion being allowed when the medium type is a reversible image display medium (TP). Another image forming apparatus including first and second image forming portions, and an image formation element setting switching device, image forming elements being set in a standard mode to a standard state for forming an image on a medium for the standard mode, and being switched in a non-standard mode to a non-standard state for forming an image on a medium for the non-standard mode.Type: GrantFiled: May 4, 2004Date of Patent: July 3, 2007Assignee: Minolta Co., Ltd.Inventors: Masahiko Matsuura, Keyaki Yogome, Hidetoshi Miyamoto, Hiroshi Mizuno, Takaji Kurita
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Publication number: 20060133833Abstract: An image forming apparatus including first and second image forming portions, and a device for detecting a type of an image display medium, image formation by the first image forming portion being allowed when the medium type is a normal image display medium (PP), and image formation by the second image forming portion being allowed when the medium type is a reversible image display medium (TP). Another image forming apparatus including first and second image forming portions, and an image formation element setting switching device, image forming elements being set in a standard mode to a standard state for forming an image on a medium for the standard mode, and being switched in a non-standard mode to a non-standard state for forming an image on a medium for the non-standard mode.Type: ApplicationFiled: May 4, 2004Publication date: June 22, 2006Applicant: MINOLTA, CO., LTD.Inventors: Masahiko Matsuura, Keyaki Yogome, Hidetoshi Miyamoto, Hiroshi Mizuno, Takaji Kurita
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Publication number: 20050212748Abstract: Disclosed is a reversible image display medium which can be repeatedly used and can display high quality images, in which cells between the two substrates accommodate a dry developer containing at least two kinds of frictionally chargeable dry developing particles having different chargeable polarities and different optical reflection densities; images are displayed by forming an electrostatic latent image corresponding to the image to be formed on one of the two substrates to drive the developing particles in an electrostatic field based on the electrostatic latent image; a developer-facing surface of one of the substrates has a surface resistivity of at least 1×1012 ohm/square; a developer-facing surface of the opposite substrate has a surface resistivity from 1×106 ohm/square to 1×1012 ohm/square; a developer-facing surface of one of the substrates has a surface average median roughness Ra of 0.2 ?m to 0.Type: ApplicationFiled: May 16, 2005Publication date: September 29, 2005Applicant: MINOLTA CO., LTD.Inventors: Masahiko Matsuura, Hiroshi Mizuno, Akihito Ikegawa, Masaharu Kanazawa, Keyaki Yogome, Takaji Kurita
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Publication number: 20050179643Abstract: A method and apparatus capable of displaying a high-quality image using a reversible image display medium in which a cell(s) formed between two substrates accommodates at least two kinds of frictionally chargeable dry developing particles having different chargeable polarities and different optical reflection densities. in image display, an electric field strength of, e.g., 0.3 V/?m to 3.0 V/?m is applied to the developer. An oscillating force (e.g. oscillating magnetic filed) is applicable and the oscillating force is substantially stopped during application of the electrostatic field. After completion of the electrostatic field, the surface of the medium on the image observation side may be charged to a potential holding the displayed image. Optionally before image display, an alternating electric field may be applied to stir the developer for initialization of the medium.Type: ApplicationFiled: February 17, 2005Publication date: August 18, 2005Applicant: MINOLTA CO., LTD.Inventors: Masahiko Matsuura, Hiroshi Mizuno, Akihito Ikegawa, Masaharu Kanazawa, Keyaki Yogome, Takaji Kurita
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Patent number: 6922204Abstract: The invention provides an image display medium comprising: a first transparent substrate disposed on an observation side; a second substrate disposed on a further side from the observation side than the first substrate; and a display layer formed between the first substrate and the second substrate and containing a plurality of developer particles; the first substrate including a color filter having at least one group of a plurality of light-transmitting filter films of different colors. The invention also provides an image recording apparatus including a recording head for recording an image on the medium and a positioning device for positioning the filter films of the color filter and the recording head. The invention further provides an image recording method comprising the steps of positioning the filter films of the medium and the recording head, and recording an image by the recording head on the medium having the filter films positioned.Type: GrantFiled: April 4, 2003Date of Patent: July 26, 2005Assignee: Minolta Co., Ltd.Inventors: Masaharu Kanazawa, Keyaki Yogome, Akihito Ikegawa
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Publication number: 20050128531Abstract: An image forming method and an image forming apparatus of forming an image on a reversible image display medium of dry developing particle moving type including substrates made of a nonconductive material. The medium is transported for forming an image on the medium while keeping the medium in uniform surface-contact with an electrostatic field applying member (e.g., a photosensitive drum carrying an electrostatic latent image) for image formation by a developing bias applying conductive member (e.g., conductive belt).Type: ApplicationFiled: December 2, 2004Publication date: June 16, 2005Inventors: Denji Nota, Takaaki Shirai, Keyaki Yogome
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Patent number: 6900789Abstract: Disclosed is a reversible image display medium which can be repeatedly used and can display high quality images, in which cells between the two substrates accommodate a dry developer containing at least two kinds of frictionally chargeable dry developing particles having different chargeable polarities and different optical reflection densities; images are displayed by forming an electrostatic latent image corresponding to the image to be formed on one of the two substrates to drive the developing particles in an electrostatic field based on the electrostatic latent image; a developer-facing surface of one of the substrates has a surface resistivity of at least 1×1012 ohm/square; a developer-facing surface of the opposite substrate has a surface resistivity from 1×106 ohm/square to 1×1012 ohm/square; a developer-facing surface of one of the substrates has a surface average median roughness Ra of 0.2 ?m to 0.Type: GrantFiled: November 16, 2001Date of Patent: May 31, 2005Assignee: Minolta Co., Ltd.Inventors: Masahiko Matsuura, Hiroshi Mizuno, Akihito Ikegawa, Masaharu Kanazawa, Keyaki Yogome, Takaji Kurita
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Patent number: 6873803Abstract: A method of displaying information about an image forming apparatus comprising a first image forming portion for forming an image on a normal image display medium and a second image forming portion for forming an image on a reversible image display medium and capable of forming an image on the normal image display medium through the first image forming portion and of forming an image on the reversible image display medium through the second image forming portion, wherein the information about the image forming apparatus (information about the state of a predetermined item in the image forming apparatus) and (or) information about a setting state for image formation in the image forming apparatus) is displayed on a display device in the image forming apparatus and (or) a display device in an image information input apparatus transmitting image data to the image forming apparatus depending on the information, and an image forming apparatus capable of executing the method.Type: GrantFiled: June 12, 2001Date of Patent: March 29, 2005Assignee: Minolta Co., Ltd.Inventors: Keyaki Yogome, Hiroshi Mizuno, Hidetoshi Miyamoto, Masahiko Matsuura, Takaji Kurita