Patents by Inventor Noboru Sakurai
Noboru Sakurai 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: 8449343Abstract: A discharge lamp includes an arc tube and a boron oxide film formed on an inner surface of the arc tube.Type: GrantFiled: January 13, 2010Date of Patent: May 28, 2013Assignee: Seiko Epson CorporationInventors: Yoshihide Nishiyama, Noboru Sakurai
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Patent number: 8405311Abstract: A discharge lamp includes an arc tube made of quartz glass and enclosing a light emitting substance, and an electrode mainly made of tungsten and arranged in the arc tube, the electrode including at least one getter material that binds with oxygen.Type: GrantFiled: January 12, 2010Date of Patent: March 26, 2013Assignee: Seiko Epson CorporationInventors: Noboru Sakurai, Yoshihide Nishiyama
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Patent number: 8401443Abstract: A developing device includes a toner particle-bearing roller that bears toner particles on its surface and develops a latent image borne by an image-bearing member with those toner particles, the toner particle-bearing roller has a projection portion disposed on its surface, the projection portion having a top surface having a flat portion, and a width of the top surface being equal to or more than a volume average particle diameter of the toner particles.Type: GrantFiled: October 11, 2011Date of Patent: March 19, 2013Assignee: Seiko Epson CorporationInventors: Yoichi Yamada, Tomohiro Aruga, Noboru Sakurai, Katsumi Okamoto, Hiroshi Kato, Masanao Kunugi, Takatomo Fukumoto
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Publication number: 20120263505Abstract: A developing device includes a toner particle-bearing roller that bears toner particles on its surface and develops a latent image borne by an image-bearing member with those toner particles, the toner particle-bearing roller has a projection portion disposed on its surface, the projection portion having a top surface having a flat portion, and a width of the top surface being equal to or more than a volume average particle diameter of the toner particles.Type: ApplicationFiled: October 11, 2011Publication date: October 18, 2012Applicant: SEIKO EPSON CORPORATIONInventors: Yoichi YAMADA, Tomohiro ARUGA, Noboru SAKURAI, Katsumi Okamoto, Hiroshi Kato, Masanao Kunugi, Takatomo Fukumoto
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Patent number: 8192339Abstract: A developing roller on a circumferential surface of which toner is held is provided. In the developing roller, intersecting first and second grooves are formed. Protrusion portions are disposed in areas surrounded by the first and second grooves. The protrusion portions have minute projections.Type: GrantFiled: November 6, 2007Date of Patent: June 5, 2012Assignee: Seiko Epson CorporationInventors: Junichi Suzuki, Noboru Sakurai
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Patent number: 8087170Abstract: A method for manufacturing a developing agent carrier of a hollow or solid cylindrical shape having an outer peripheral surface and an irregularity section formed on the outer peripheral surface to carry a developing agent is provided. The method comprises a step of preparing a base material of a hollow or solid cylindrical shape which is to become the developing agent carrier, the base material having an outer peripheral surface; and a step of forming the irregularity section by pressing dice for formation of the irregularity section against the outer peripheral surface of the base material.Type: GrantFiled: November 17, 2006Date of Patent: January 3, 2012Assignee: Seiko Epson CorporationInventors: Noboru Sakurai, Yoichi Yamada, Junichi Nakahara, Masanao Kunugi, Tomohiro Aruga, Katsumi Okamoto
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Patent number: 8086150Abstract: A developing device includes a toner particle-bearing roller that bears toner particles on its surface and develops a latent image borne by an image-bearing member with those toner particles, the toner particle-bearing roller has a projection portion disposed on its surface, the projection portion having a top surface having a flat portion, and a width of the top surface being equal to or more than a volume average particle diameter of the toner particles.Type: GrantFiled: November 2, 2006Date of Patent: December 27, 2011Assignee: Seiko Epson CorporationInventors: Yoichi Yamada, Tomohiro Aruga, Noboru Sakurai
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Publication number: 20100213840Abstract: A discharge lamp includes an arc tube and a boron oxide film formed on an inner surface of the arc tube.Type: ApplicationFiled: January 13, 2010Publication date: August 26, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Yoshihide NISHIYAMA, Noboru SAKURAI
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Publication number: 20100213841Abstract: A discharge lamp includes an arc tube, a first protection film mainly made of a metal oxide and formed on an inner surface of the arc tube, and a second protection film mainly made of boron nitride or boron oxide and formed on the first protection film.Type: ApplicationFiled: January 13, 2010Publication date: August 26, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Yoshihide NISHIYAMA, Noboru SAKURAI
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Publication number: 20100201268Abstract: A discharge lamp includes an arc tube made of quartz glass and enclosing a light emitting substance, and an electrode mainly made of tungsten and arranged in the arc tube, the electrode including at least one getter material that binds with oxygen.Type: ApplicationFiled: January 12, 2010Publication date: August 12, 2010Applicant: SEIKO EPSON CORPORATIONInventors: Noboru SAKURAI, Yoshihide NISHIYAMA
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Publication number: 20090245891Abstract: An apparatus includes: a rolling die having protruding threads and a feeding unit moving the workpiece by L1 per rotation. The rolling die includes: a straight portion maintaining a distance between a top of each protruded thread and an axial line of the rolling die nearly constant; and two tapered portions gradually reducing the distance outward from both ends of the straight portion. At least one tapered portion downstream of the workpiece has a width larger than L1, and a distance r1 between the top of each protruded thread and the axial line direction of the rolling die in the straight portion and a distance r2 between the top of each protruded thread and the axial line direction of the rolling die at a portion separated from a boundary between the straight portion and the one tapered portion by L1 satisfies the relation r1?r2?5 micrometers.Type: ApplicationFiled: June 12, 2008Publication date: October 1, 2009Applicant: Seiko Epson CorporationInventors: Noboru SAKURAI, Junichi Suzuki
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Patent number: 7565099Abstract: A developing device includes a container that contains toner particles that are for developing a latent image borne by an image bearing body, and a toner-particle bearing roller that has a helical groove portion on a surface thereof that is for bearing the toner particles, the helical groove portion having an inclination with respect to an axial direction and a circumferential direction of the toner-particle bearing roller and being formed having a uniform pitch in the axial direction.Type: GrantFiled: October 30, 2006Date of Patent: July 21, 2009Assignee: Seiko Epson CorporationInventors: Yoichi Yamada, Tomohiro Aruga, Noboru Sakurai, Masanao Kunugi, Katsumi Okamoto, Hiroshi Kato
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Patent number: 7555252Abstract: An image forming apparatus includes: an image bearing body that is rotatable about a central axis thereof, and that bears a dot-like latent image, on a surface of the image bearing body, in each of a plurality of divided regions that are arranged in rows along a direction that intersects an axial direction of the central axis at a predetermined intersection angle; and a developer bearing roller that is rotatable in order to make visible, as a developer image, the dot-like latent images borne by the image bearing body, using a developer borne on a surface of the developer bearing roller, the developer bearing roller opposing the image bearing body such that an axial direction of the developer bearing roller is parallel to the axial direction of the image bearing body, and that includes a helical groove portion on the surface of the developer bearing roller, the helical groove portion being inclined at a predetermined inclination angle with respect to the axial direction of the developer bearing roller and beinType: GrantFiled: January 16, 2007Date of Patent: June 30, 2009Assignee: Seiko Epson CorporationInventors: Tomohiro Aruga, Yoichi Yamada, Noboru Sakurai, Takatomo Fukumoto
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Publication number: 20080107455Abstract: A developing roller on a circumferential surface of which toner is held includes a plurality of first grooves formed in parallel to each other at approximately equal intervals, each in a direction inclined to a circumferential direction of the circumferential surface of the developing roller; a plurality of second grooves formed in parallel to each other at approximately equal intervals, each in a direction inclined to the circumferential direction of the circumferential surface of the developing roller, each second groove intersecting each first groove, the first groove and the second groove each having a U-shaped cross section; and a protrusion portion disposed in an area surrounded by the first groove and the second groove. In the developing roller, the protrusion portion has on a top surface thereof a plurality of minute projections, and when a surface roughness Rz of the top surface is RO, RO is 0.Type: ApplicationFiled: November 6, 2007Publication date: May 8, 2008Applicant: SEIKO EPSON CORPORATIONInventors: Junichi SUZUKI, Noboru SAKURAI
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Publication number: 20070177908Abstract: An image forming apparatus includes: an image bearing body that is rotatable about a central axis thereof, and that bears a dot-like latent image, on a surface of the image bearing body, in each of a plurality of divided regions that are arranged in rows along a direction that intersects an axial direction of the central axis at a predetermined intersection angle; and a developer bearing roller that is rotatable in order to make visible, as a developer image, the dot-like latent images borne by the image bearing body, using a developer borne on a surface of the developer bearing roller, the developer bearing roller opposing the image bearing body such that an axial direction of the developer bearing roller is parallel to the axial direction of the image bearing body, and that includes a helical groove portion on the surface of the developer bearing roller, the helical groove portion being inclined at a predetermined inclination angle with respect to the axial direction of the developer bearing roller and beinType: ApplicationFiled: January 16, 2007Publication date: August 2, 2007Applicant: SEIKO EPSON CORPORATIONInventors: Tomohiro ARUGA, Yoichi YAMADA, Noboru SAKURAI, Takatomo FUKUMOTO
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Publication number: 20070147906Abstract: A method for manufacturing a developing agent carrier of a hollow or solid cylindrical shape having an outer peripheral surface and an irregularity section formed on the outer peripheral surface to carry a developing agent is provided. The method comprises a step of preparing a base material of a hollow or solid cylindrical shape which is to become the developing agent carrier, the base material having an outer peripheral surface; and a step of forming the irregularity section by pressing dice for formation of the irregularity section against the outer peripheral surface of the base material.Type: ApplicationFiled: November 17, 2006Publication date: June 28, 2007Applicant: SEIKO EPSON CORPORATIONInventors: Noboru SAKURAI, Yoichi YAMADA, Junichi NAKAHARA, Masanao KUNUGI, Tomohiro ARUGA, Katsumi OKAMOTO
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Publication number: 20070110481Abstract: A developing device includes a toner particle-bearing roller that bears toner particles on its surface and develops a latent image borne by an image-bearing member with those toner particles, the toner particle-bearing roller has a projection portion disposed on its surface, the projection portion having a top surface having a flat portion, and a width of the top surface being equal to or more than a volume average particle diameter of the toner particles.Type: ApplicationFiled: November 2, 2006Publication date: May 17, 2007Applicant: SEIKO EPSON CORPORATIONInventors: Yoichi YAMADA, Tomohiro ARUGA, Noboru SAKURAI, Katsumi OKAMOTO, Hiroshi KATO, Masanao KUNUGI, Takatomo FUKUMOTO
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Publication number: 20070110484Abstract: A developing device includes a container that contains toner particles that are for developing a latent image borne by an image bearing body, and a toner-particle bearing roller that has a helical groove portion on a surface thereof that is for bearing the toner particles, the helical groove portion having an inclination with respect to an axial direction and a circumferential direction of the toner-particle bearing roller and being formed having a uniform pitch in the axial direction.Type: ApplicationFiled: October 30, 2006Publication date: May 17, 2007Applicant: SEIKO EPSON CORPORATIONInventors: Yoichi YAMADA, Tomohiro ARUGA, Noboru SAKURAI, Masanao KUNUGI, Katsumi OKAMOTO, Hiroshi KATO
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Publication number: 20030151878Abstract: An electronic apparatus includes an electronic device including electronic circuits, a first connector connected to the electronic circuit, and static electricity removal means, and a control device which includes a plurality of second connectors for connecting the electronic device and which is electrically connected to the static electricity removal means when the electronic device is being inserted and is electrically connected to the electronic device only via the first connector and the second connectors when the electronic device is mounted. Thus, it is possible to gradually discharge the static electricity when the electronic device is inserted into the control apparatus.Type: ApplicationFiled: February 6, 2003Publication date: August 14, 2003Inventors: Azuma Kano, Takuji Ogawa, Masahiko Sato, Satoshi Yagi, Katsuyoshi Suzuki, Minoru Shimokawa, Kenichi Tateyama, Noboru Sakurai, Koichi Ono, Takuya Okaki
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Patent number: 5148334Abstract: Every other input pulse is extracted from an input signal containing alternate phase-advanced and phase-delayed pulses read out of a magnetic disk unit, a magnetic tape unit or the like. Output pulses in synchronism with the pulses thus extracted are produced. This extraction may be effected only during a predetermined length of time after staring application of the input pulses at the time of pull-in of a phase sync circuit. Whether phase synchronization is to be effected in accordance with advanced-phase or delayed-phase input pulses is determined from time to time as required.Type: GrantFiled: December 1, 1989Date of Patent: September 15, 1992Assignees: Hitachi, Ltd., Hitachi Computer Peripherals Co., Ltd.Inventors: Takikazu Takeuchi, Hiroyuki Yokohara, Takuji Ogawa, Noboru Sakurai