Patents by Inventor Kohichi Yamazaki
Kohichi Yamazaki 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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Publication number: 20140003843Abstract: A development device includes a developer bearer to carry the developer to a development range, a magnetic field generator disposed inside the developer bearer for generating magnetic force, a developer regulator for adjusting an amount of the developer, a developer supply compartment disposed adjacent to the developer bearer, separated by a side wall from a portion where the developer bearer is provided, a developer agitator provided in the supply compartment, and a blocker disposed above the side wall of the supply compartment across a supply gap through which the developer moves from the supply compartment. The magnetic field generator has an attraction magnetic pole and a regulation magnetic pole. The blocker prevents the developer blocked by the developer regulator from moving along a magnetic force line of the regulation magnetic force toward the circumferential surface of the developer bearer.Type: ApplicationFiled: September 6, 2013Publication date: January 2, 2014Applicant: RICOH COMPANY, LTD.Inventors: Yuji SUZUKI, Akihiro TAKAYAMA, Kentarou NODERA, Hiroyuki UENISHI, Susumu TATEYAMA, Shinnosuke KOSHIZUKA, Tatsuya KUBO, Kohichi YAMAZAKI
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Patent number: 8559856Abstract: A development device includes a developer bearer to carry the developer to a development range, a magnetic field generator disposed inside the developer bearer for generating magnetic force, a developer regulator for adjusting an amount of the developer, a developer supply compartment disposed adjacent to the developer bearer, separated by a side wall from a portion where the developer bearer is provided, a developer agitator provided in the supply compartment, and a blocker disposed above the side wall of the supply compartment across a supply gap through which the developer moves from the supply compartment. The magnetic field generator has an attraction magnetic pole and a regulation magnetic pole. The blocker prevents the developer blocked by the developer regulator from moving along a magnetic force line of the regulation magnetic force toward the circumferential surface of the developer bearer.Type: GrantFiled: July 27, 2011Date of Patent: October 15, 2013Assignee: Ricoh Company, Ltd.Inventors: Yuji Suzuki, Akihiro Takayama, Kentarou Nodera, Hiroyuki Uenishi, Susumu Tateyama, Shinnosuke Koshizuka, Tatsuya Kubo, Kohichi Yamazaki
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Publication number: 20120051797Abstract: A development device includes a developer bearer to carry the developer to a development range, a magnetic field generator disposed inside the developer bearer for generating magnetic force, a developer regulator for adjusting an amount of the developer, a developer supply compartment disposed adjacent to the developer bearer, separated by a side wall from a portion where the developer bearer is provided, a developer agitator provided in the supply compartment, and a blocker disposed above the side wall of the supply compartment across a supply gap through which the developer moves from the supply compartment. The magnetic field generator has an attraction magnetic pole and a regulation magnetic pole. The blocker prevents the developer blocked by the developer regulator from moving along a magnetic force line of the regulation magnetic force toward the circumferential surface of the developer bearer.Type: ApplicationFiled: July 27, 2011Publication date: March 1, 2012Applicant: Ricoh Company, Ltd.Inventors: Yuji Suzuki, Akihiro Takayama, Kentarou Nodera, Hiroyuki Uenishi, Susumu Tateyama, Shinnosuke Koshizuka, Tatsuya Kubo, Kohichi Yamazaki
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Patent number: 8005377Abstract: An image forming device includes an image carrier having a surface onto which an electrostatic latent image is formed, a development station including a case made of a conductive body and one or more developer rollers, which supply toner housed in the case to the surface of the image carrier, and develop the electrostatic latent image formed on the surface of the image carrier as a toner image, a unit, which forms a standard concentration toner image of on the surface of the image carrier, a detector, which detects a toner adhesion amount of the standard concentration toner image formed on the surface of the image carrier by the standard concentration toner image-forming unit, and a voltage controller, which controls a bias voltage to be applied to the case according to a detected result of the toner adhesion amount of the standard concentration toner image by the detector.Type: GrantFiled: January 15, 2009Date of Patent: August 23, 2011Assignee: Ricoh Company, Ltd.Inventor: Kohichi Yamazaki
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Patent number: 7834277Abstract: The present invention provides a method of manufacturing printed a circuit board capable of formation of via holes having a low aspect ratio and formation of fine lines, and a printed circuit board manufactured by the method. The method of manufacturing a printed circuit board 10 according to the present invention includes a step of selectively forming a plating layer 16 for lands 22a and 22b on a metal foil 14 on the printed circuit board 10, a step of adjusting the thickness of the plating layer 16, and a step of forming the metal foil 14 into lines 14a. The aspect ratio of via holes 28 formed on lands 22a and 22b can be adjusted by adjusting the thickness of the lands 22a and 22b.Type: GrantFiled: September 27, 2007Date of Patent: November 16, 2010Assignee: International Business Machines CorporationInventors: Kohichi Ohsumi, Kenji Terada, Kohichi Yamazaki
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Patent number: 7726016Abstract: The present invention provides a method of manufacturing a printed circuit board. The method includes the steps of preparing an insulating substrate having a front surface and a back surface and a layer of metal foil formed on each of the front surface and the back surface; selectively forming a plating layer for forming a land on at least one of the metal foils; adjusting a thickness of the plating layer; and forming the metal foils into lines.Type: GrantFiled: May 26, 2004Date of Patent: June 1, 2010Assignee: International Business Machines CorporationInventors: Kohichi Ohsumi, Kenji Terada, Kohichi Yamazaki
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Publication number: 20090185815Abstract: An image forming device includes an image carrier having a surface onto which an electrostatic latent image is formed, a development station including a case made of a conductive body and one or more developer rollers, which supply toner housed in the case to the surface of the image carrier, and develop the electrostatic latent image formed on the surface of the image carrier as a toner image, a unit, which forms a standard concentration toner image of on the surface of the image carrier, a detector, which detects a toner adhesion amount of the standard concentration toner image formed on the surface of the image carrier by the standard concentration toner image-forming unit, and a voltage controller, which controls a bias voltage to be applied to the case according to a detected result of the toner adhesion amount of the standard concentration toner image by the detector.Type: ApplicationFiled: January 15, 2009Publication date: July 23, 2009Inventor: Kohichi Yamazaki
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Publication number: 20080257597Abstract: The present invention provides a method of manufacturing printed a circuit board capable of formation of via holes having a low aspect ratio and formation of fine lines, and a printed circuit board manufactured by the method. The method of manufacturing a printed circuit board 10 according to the present invention includes a step of selectively forming a plating layer 16 for lands 22a and 22b on a metal foil 14 on the printed circuit board 10, a step of adjusting the thickness of the plating layer 16, and a step of forming the metal foil 14 into lines 14a. The aspect ratio of via holes 28 formed on lands 22a and 22b can be adjusted by adjusting the thickness of the lands 22a and 22b.Type: ApplicationFiled: September 27, 2007Publication date: October 23, 2008Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Kohichi Ohsumi, Kenji Terada, Kohichi Yamazaki
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Publication number: 20070121176Abstract: An optical unit may include an image pick-up device, a lens unit and a holding member. The image pick-up device may convert a reflected light reflected from an original document to an electric signal, after the light is irradiated on the original document from a light source. The lens unit may image the reflected light on the image pick-up device. The holding member may hold the image pick-up device and lenses. The direction of a fluctuation of a focal length of the lens unit caused by heat and a direction of the fluctuation of a distance between the image pick-up device and the lens unit caused by heat may agree with each other.Type: ApplicationFiled: November 27, 2006Publication date: May 31, 2007Inventors: Kohichi Yamazaki, Tetsuya Kimura, Hiroshi Kusumoto, Yoshiaki Nagao, Takehisa Shimazu
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Publication number: 20040222015Abstract: The present invention provides a method of manufacturing printed a circuit board capable of formation of via holes having a low aspect ratio and formation of fine lines, and a printed circuit board manufactured by the method. The method of manufacturing a printed circuit board 10 according to the present invention includes a step of selectively forming a plating layer 16 for lands 22a and 22b on a metal foil 14 on the printed circuit board 10, a step of adjusting the thickness of the plating layer 16, and a step of forming the metal foil 14 into lines 14a. The aspect ratio of via holes 28 formed on lands 22a and 22b can be adjusted by adjusting the thickness of the lands 22a and 22b.Type: ApplicationFiled: May 26, 2004Publication date: November 11, 2004Applicant: INTERNATIONAL BUSINESS MACHINES CORPORATIONInventors: Kohichi Ohsumi, Kenji Terada, Kohichi Yamazaki
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Patent number: 6101361Abstract: An image forming apparatus and method in which a transfer device is provided in a position separated from an image carrier. A transfer sheet is conveyed along and contacting a part of a circumferential surface of the image carrier facing the transfer device when transferring a toner image from the image carrier to the transfer sheet. A conveying guide is included to guide and covey the transfer sheet separated from the image carrier to a fixing unit.Type: GrantFiled: December 21, 1998Date of Patent: August 8, 2000Assignee: Ricoh Co., Ltd.Inventors: Kenji Karashima, Kohichi Yamazaki, Kentaro Matsumoto, Kazuhiko Yuuki, Manabu Mochizuki, Noriyuki Usui, Asami Mae, Masakuni Konja
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Patent number: 5884134Abstract: An image forming apparatus in which a transfer device is provided in a position separated from an image carrier. A transfer sheet is conveyed along and contacting a part of a circumferential surface of the image carrier facing the transfer device when transferring a toner image from the image carrier to the transfer sheet. A conveying guide is included to guide and covey the transfer sheet separated from the image carrier to a fixing unit. The conveying guide includes a guiding member to direct the conveying direction of the transfer sheet upward when the leading edge of the transfer sheet contacts the guiding member and to convey the transfer sheet at a part of the conveying guide or the guiding member in a position higher than the position of the leading edge of the transfer sheet contacting the conveying guide or the guiding member, so that the contact area between the transfer sheet and the image carrier increases.Type: GrantFiled: June 19, 1997Date of Patent: March 16, 1999Assignee: Ricoh Co., Ltd.Inventors: Kenji Karashima, Kohichi Yamazaki, Kentaro Matsumoto, Kazuhiko Yuuki, Manabu Mochizuki, Noriyuki Usui, Asami Mae, Masakuni Konja