Patents by Inventor Yasushi Koshimura
Yasushi Koshimura 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: 8676070Abstract: The image forming apparatus has a first and a second transfer member which transfer toner images onto a transfer body; and a control section, which measures a first density of a first toner image formed on the transfer body, measures a second density of a second toner image formed on the transfer body and determines a transfer current for the first and the second transfer member based on the first and the second density.Type: GrantFiled: January 19, 2012Date of Patent: March 18, 2014Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yasushi Koshimura, Kazuteru Ishizuka
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Patent number: 8401419Abstract: An image forming apparatus, in which a toner collection section is disposed in an air pathway between a ventilation duct and suction blower, and the toner collection section and a recovery container are connected via an opening and closing device, has a control device to control the opening and closing device to close the opening and closing device when the suction blower is suctioning air and to open the opening and closing device so that the recovery container recovers the toner collected by the toner collection section after the suction blower is stopped.Type: GrantFiled: November 16, 2010Date of Patent: March 19, 2013Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yasushi Koshimura, Daiki Yamanaka
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Publication number: 20120189333Abstract: The image forming apparatus has a first and a second transfer member which transfer toner images onto a transfer body; and a control section, which measures a first density of a first toner image formed on the transfer body, measures a second density of a second toner image formed on the transfer body and determines a transfer current for the first and the second transfer member based on the first and the second density.Type: ApplicationFiled: January 19, 2012Publication date: July 26, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yasushi Koshimura, Kazuteru Ishizuka
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Publication number: 20120002992Abstract: Provided is a low cost color image forming apparatus in which the density of the image having been fixed is optimally adjusted and jamming in the fixing device is prohibited.Type: ApplicationFiled: June 28, 2011Publication date: January 5, 2012Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Toru YAMAGUCHI, Yasushi KOSHIMURA, Daiki YAMANAKA
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Patent number: 8055147Abstract: Toner images of reference patterns having different resolutions are formed on an image carrier, image densities of the toner images of reference patterns are detected by a density sensor, and an output of the density sensor, when the detected densities equate among the reference patterns having different resolutions formed with the same image forming condition, is memorized as a reference value for calibrating the output the density sensor.Type: GrantFiled: January 22, 2008Date of Patent: November 8, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yasushi Koshimura, Toru Yamaguchi
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Patent number: 7978213Abstract: A focus adjustment method of an LED print head of an image forming apparatus, including steps of: setting one end with respect to a longitudinal direction of the LED print head on a first position where a distance between the photoconductor and the LED print head becomes shorter than a designed focal length, and setting other end with respect to the longitudinal direction of the LED print head on a second position where the distance between the photoconductor and the LED print head becomes longer than the designed focal length; outputting a pattern image having a predetermined resolution; and adjusting the position of the LED print head by moving each of the one end and the other end of the LED print head, based on information of the resolution of the outputted pattern image.Type: GrantFiled: August 15, 2007Date of Patent: July 12, 2011Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yasushi Koshimura, Toru Yamaguchi
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Publication number: 20110129249Abstract: An image forming apparatus, in which a toner collection section is disposed in an air pathway between a ventilation duct and suction blower, and the toner collection section and a recovery container are connected via an opening and closing device, has a control device to control the opening and closing device to close the opening and closing device when the suction blower is suctioning air and to open the opening and closing device so that the recovery container recovers the toner collected by the toner collection section after the suction blower is stopped.Type: ApplicationFiled: November 16, 2010Publication date: June 2, 2011Inventors: Yasushi Koshimura, Daiki Yamanaka
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Publication number: 20080226316Abstract: Toner images of reference patterns having different resolutions are formed on an image carrier, image densities of the toner images of reference patterns are detected by a density sensor, and an output of the density sensor, when the detected densities equate among the reference patterns having different resolutions formed with the same image forming condition, is memorized as a reference value for calibrating the output the density sensor.Type: ApplicationFiled: January 22, 2008Publication date: September 18, 2008Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yasushi Koshimura, Toru Yamaguchi
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Publication number: 20080170870Abstract: An image forming apparatus includes: a photoreceptor, a charging unit which charges the photoreceptor; an exposing unit which forms a latent image onto the photoreceptor; a developing unit which develops the latent image to a toner image; a sensor which detects a line width of a toner patch formed on the photoreceptor by the exposing unit and the developing unit; and a controller which changes a background voltage based on the line width detected by the sensor during an image forming operation so that the line width is secured within a predetermined line width. The controller returns the background voltage to value adjacent to an initial setting background voltage and changes the light amount of the exposing unit by a light amount corresponding to a returning amount of the background voltage.Type: ApplicationFiled: December 5, 2007Publication date: July 17, 2008Inventors: Toru YAMAGUCHI, Yasushi Koshimura
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Publication number: 20080068439Abstract: A focus adjustment method of an LED print head of an image forming apparatus, including steps of: setting one end with respect to a longitudinal direction of the LED print head on a first position where a distance between the photoconductor and the LED print head becomes shorter than a designed focal length, and setting other end with respect to the longitudinal direction of the LED print head on a second position where the distance between the photoconductor and the LED print head becomes longer than the designed focal length; outputting a pattern image having a predetermined resolution; and adjusting the position of the LED print head by moving each of the one end and the other end of the LED print head, based on information of the resolution of the outputted pattern image.Type: ApplicationFiled: August 15, 2007Publication date: March 20, 2008Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Yasushi Koshimura, Toru Yamaguchi
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Patent number: 7340195Abstract: An image forming apparatus includes: an image carrier with an electrostatic latent image formed thereon; a developing device for developing the electrostatic latent image into a toner image, a developer carrier arranged opposite to the image carrier, for allowing a magnetic field generation member arranged inside the developer carrier, for forming a magnetized area of the magnetic brush in a predetermined area in the axial direction of the developer carrier; and a scatter toner sucking port arranged at a position other than a position opposite to the magnetized area of the developer carrier.Type: GrantFiled: July 15, 2005Date of Patent: March 4, 2008Assignee: Konica Minolta Business Technologies, Inc.Inventors: Kanehiro Watanabe, Junichi Koiso, Yasushi Koshimura
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Publication number: 20070065171Abstract: An image forming apparatus includes: a developing unit which develops a latent image formed by a writing unit on an image carrier which has been uniformly charged by a charger; and a developer sucking section, the developer sucking section comprising a ventilation duct having a sucking opening provided in the vicinity of a position to which the image carrier and a developing roller of the developing unit are closed for collecting a floating developer that is splashed from the developing roller, and an exhaust duct connected with the ventilation duct and provided with a suction blower, a filter, and an exhaust opening; wherein a barrier section for catching a part of the floating developer is provided in the ventilation duct.Type: ApplicationFiled: May 22, 2006Publication date: March 22, 2007Inventors: Yasushi Koshimura, Junichi Koiso, Yoshiaki Kondoh
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Image developing apparatus to develop a latent image in a developing area on an image bearing member
Patent number: 7079785Abstract: An image developing apparatus having a rotating member to bear developing agent in a housing of the image developing apparatus and to convey the developing agent of latent images onto paper transfer sheets opposite a image bearing member, wherein a part of the rotating member rotatably supported by the housing of the image development apparatus is exposed to the exterior of the housing of the image development apparatus so that the exposed portion of the rotating member radiates heat accumulated of the rotating member.Type: GrantFiled: June 25, 2004Date of Patent: July 18, 2006Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yasushi Koshimura, Junichi Koiso, Kanehiro Watanabe, Takayuki Horie -
Patent number: 7043172Abstract: An image forming apparatus may comprise a suction section, fitted onto the air vent, for sucking toner particles scattered in the image forming apparatus, including an intermediate duct in which the toner particles accumulate and which is detachable from the suction section, and an exhaust fan for sucking air including the toner particles, through the intermediate air duct, and discharging air outside the image forming apparatus.Type: GrantFiled: April 21, 2004Date of Patent: May 9, 2006Assignee: Konica Minolta Business Technologies, Inc.Inventors: Yasushi Koshimura, Junichi Koiso, Kanehiro Watanabe
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Publication number: 20060078348Abstract: An image forming apparatus includes: an image carrier with an electrostatic latent image formed thereon; a developing device for developing the electrostatic latent image into a toner image, a developer carrier arranged opposite to the image carrier, for allowing the magnetic brush formed by a developer, to be carried on the outer circumferential surface; a magnetic field generation member arranged inside the developer carrier, for forming the magnetized area of the magnetic brush in a predetermined area in the axial direction of the developer carrier; and a scattered toner sucking port arranged at a position other than a position opposite to the magnetized area of the developer carrier.Type: ApplicationFiled: July 15, 2005Publication date: April 13, 2006Inventors: Kanehiro Watanabe, Junichi Koiso, Yasushi Koshimura
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Publication number: 20050100360Abstract: An image developing apparatus having a rotating member to bear developing agent in a housing of the image developing apparatus and to convey the developing agent of latent images onto paper transfer sheets opposite a image bearing member, wherein a part of the rotating member rotatably supported by the housing of the image development apparatus is exposed to the exterior of the housing of the image development apparatus so that the exposed portion of the rotating member radiates heat accumulated of the rotating member.Type: ApplicationFiled: June 25, 2004Publication date: May 12, 2005Inventors: Yasushi Koshimura, Junichi Koiso, Kanehiro Watanabe, Takayuki Horie
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Publication number: 20050031370Abstract: An image forming apparatus, including: a suction section, fitted onto the air vent, for sucking toner particles scattered in the image forming apparatus, including: an intermediate duct in which the toner particles accumulate and which is detachable from the suction section, and an exhaust fan for sucking air including the toner particles, through the intermediate air duct, and discharging air outside the image forming apparatus.Type: ApplicationFiled: April 21, 2004Publication date: February 10, 2005Inventors: Yasushi Koshimura, Junichi Koiso, Kanehiro Watanabe
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Patent number: 6678484Abstract: An image forming apparatus and method using a toner containing toner particles having a coefficient of shape falling within a range of 1.0 to 1.6 of an amount of at least 65% by number, and having no protrusion of an amount of at least 50% by number, the image forming apparatus including a charging device for uniformly charging a photoreceptor, a developing device for developing an image obtained by imagewise exposure with the toner, a transfer device for transferring a toner image onto a transfer material, a fixing device for fixing, and a cleaning device for cleaning the photoreceptor after the transfer of a toner image, wherein when a toner image which is not to be transferred is formed on the photoreceptor, image formation is performed after cleaning is done a plurality of times for an area on which the toner image has been formed in the previous process.Type: GrantFiled: May 21, 2002Date of Patent: January 13, 2004Assignee: Konica CorporationInventors: Yasushi Koshimura, Yukiko Omori, Junichi Hamada, Mitsugu Nemoto
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Publication number: 20020191986Abstract: An image forming apparatus using a toner containing toner particles having a coefficient of shape falling within a range of 1.0 to 1.6 of an amount of at least 65% by number, and having no protrusion of an amount of at least 50% by number, the image forming apparatus including a charging device for uniformly charging a photoreceptor, a developing device for developing an image obtained by imagewise exposure with the toner, a transfer device for transferring a toner image onto a transfer material, a fixing device for fixing, and a cleaning device for cleaning the photoreceptor after the transfer of a toner image, wherein when a toner image which is not to be transferred is formed on the photoreceptor, image formation is performed after cleaning is done a plurality of times for an area on which the toner image has been formed in the previous process.Type: ApplicationFiled: May 21, 2002Publication date: December 19, 2002Inventors: Yasushi Koshimura, Yukiko Omori, Junichi Hamada, Mitsugu Nemoto
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Patent number: 6288733Abstract: An image forming apparatus includes a photoreceptor, an exposure device for exposing the photoreceptor with a laser beam dot by dot so as to form a dotted latent image on the photoreceptor, and a developing device for developing the dotted latent image with developer. The apparatus also includes a dot diameter correcting device for correcting a diameter of the dot formed on the photoreceptor. The dot diameter correcting device includes an image patch producing device for forming an image patch having a specific dot pattern with a laser beam having a predetermined power strength by the exposure device, an image patch detector for detecting a density level of the image patch formed on the photoreceptor, and a memory for storing data of laser power strengths with correlation to the detected density levels. With this structure, a controller controls laser power strength of the exposure device based on the correlated data stored in the memory and the density level detected by the image patch detector.Type: GrantFiled: March 28, 2000Date of Patent: September 11, 2001Assignee: Konica CorporationInventors: Kazuhiro Nakazawa, Yasushi Koshimura, Toru Komatsu, Koichi Gunji