Patents by Inventor Masato Ikegawa
Masato Ikegawa 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: 9636912Abstract: Under a condition in which bowed printing occurs, a horizontal shift is suppressed to improve print quality. Following a program stored in a ROM 12, an MPU 10 generates video data for charging print particles according to print contents data stored in a RAM 11. Based on the print contents data, the MPU 10 detects a letter to be printed last, and when the letter to be printed last is printed to end a print operation, generates video data so that based on the video data, a non-print charge voltage driving non-print particles to an extent that they do not fly over a gutter 25 is applied to non-print particles. The number of the non-print particles subjected to the non-print charge voltage is determined by the MPU 10, based on the distance from a print head 2 to a print subject 30, a letter height preset value, etc. A character signal generating circuit 18 generates the non-print charge voltage, based on the video data, and applies the generated the non-print charge voltage to a charging electrode 22.Type: GrantFiled: December 19, 2013Date of Patent: May 2, 2017Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Tsuneaki Takagishi, Nobuhiro Harada, Manabu Kato, Takashi Kawano, Masato Ikegawa
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Publication number: 20160046124Abstract: Under a condition in which bowed printing occurs, a horizontal shift is suppressed to improve print quality. Following a program stored in a ROM 12, an MPU 10 generates video data for charging print particles according to print contents data stored in a RAM 11. Based on the print contents data, the MPU 10 detects a letter to be printed last, and when the letter to be printed last is printed to end a print operation, generates video data so that based on the video data, a non-print charge voltage driving non-print particles to an extent that they do not fly over a gutter 25 is applied to non-print particles. The number of the non-print particles subjected to the non-print charge voltage is determined by the MPU 10, based on the distance from a print head 2 to a print subject 30, a letter height preset value, etc. A character signal generating circuit 18 generates the non-print charge voltage, based on the video data, and applies the generated the non-print charge voltage to a charging electrode 22.Type: ApplicationFiled: December 19, 2013Publication date: February 18, 2016Inventors: Tsuneaki TAKAGISHI, Nobuhiro HARADA, Manabu KATO, Takashi KAWANO, Masato IKEGAWA
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Publication number: 20150321468Abstract: An ink jet recording apparatus that can perform high velocity printing without printing distortion is realized. In a continuous discharge type ink jet recording apparatus, a unit that suppresses a velocity in the vicinity of a center axis is disposed in a unit that injects ink droplets in which because a velocity in an outer periphery is higher than that in a center of a discharged liquid column, a velocity on a surface of the liquid column becomes quickly high, and a capillary wave that propagates on a surface of the liquid column in a travel direction is quickly amplified because the velocity becomes quickly a velocity suitable for droplet breakup, the droplet breakup is quickly generated, and the droplet breakup is surely generated within a charging electrode located next to the nozzle. As a result, an ink jet recording apparatus stable in printing quality performance is provided.Type: ApplicationFiled: January 13, 2015Publication date: November 12, 2015Inventors: Masato IKEGAWA, Eiji ISHII, Nobuhiro HARADA, Akira MIYAO
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Patent number: 8919934Abstract: A voltage is applied between first and second deflecting electrodes from a deflecting voltage controller, whereby an electric field is formed between the first and second deflecting electrodes in a direction perpendicular to electrode surfaces. An electric line of force is generated from a direction perpendicular to the electrode surface of the first deflecting electrode and made perpendicularly incident on the electrode surface of the second deflecting electrode. Since the first and second deflecting electrodes are parallel to each other, a plurality of parallel electric lines of force are formed perpendicularly to the electrode surfaces of the first and second deflecting electrodes. Droplets after passing charged electrodes fly in a region where this deflecting electric field is formed, whereby charged droplets are deflected in a direction in which the charged droplets approach the second electrode having opposite charging polarity. The charged droplets form a printing pattern.Type: GrantFiled: February 19, 2013Date of Patent: December 30, 2014Assignee: Hitachi Industrial Equipment Services Co., Ltd.Inventors: Masato Ikegawa, Eiji Ishii, Nobuhiro Harada, Tsuneaki Takagishi
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Publication number: 20130314462Abstract: A voltage is applied between first and second deflecting electrodes from a deflecting voltage controller, whereby an electric field is formed between the first and second deflecting electrodes in a direction perpendicular to electrode surfaces. An electric line of force is generated from a direction perpendicular to the electrode surface of the first deflecting electrode and made perpendicularly incident on the electrode surface of the second deflecting electrode. Since the first and second deflecting electrodes are parallel to each other, a plurality of parallel electric lines of force are formed perpendicularly to the electrode surfaces of the first and second deflecting electrodes. Droplets after passing charged electrodes fly in a region where this deflecting electric field is formed, whereby charged droplets are deflected in a direction in which the charged droplets approach the second electrode having opposite charging polarity. The charged droplets form a printing pattern.Type: ApplicationFiled: February 19, 2013Publication date: November 28, 2013Applicant: HITACHI INDUSTRIAL EQUIPMENT SYSTEMS CO., LTD.Inventors: Masato IKEGAWA, Eiji ISHII, Nobuhiro HARADA, Tsuneaki TAKAGISHI
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Patent number: 8077431Abstract: A sickle-shaped disk drive spoiler for reducing turbulence of airflow in a hard disk drive is provided. The sickle-shaped spoiler is configured to direct airflow generated by a rotating disk and includes a tapered first end portion configured to direct the airflow toward the inner diameter of the disk and to reduce the airflow on the side of the disk opposing the spoiler.Type: GrantFiled: December 21, 2010Date of Patent: December 13, 2011Assignee: Hitachi Global Storage Technologies, Netherlands B.V.Inventors: Yukinobu Abe, Andre S. Chan, Ferdinand Hendriks, Masato Ikegawa, Hiroshi Mukai, Keiichi Takemori
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Publication number: 20110090593Abstract: A sickle-shaped disk drive spoiler for reducing turbulence of airflow in a hard disk drive is provided. The sickle-shaped spoiler is configured to direct airflow generated by a rotating disk and includes a tapered first end portion configured to direct the airflow toward the inner diameter of the disk and to reduce the airflow on the side of the disk opposing the spoiler.Type: ApplicationFiled: December 21, 2010Publication date: April 21, 2011Inventors: Yukinobu Abe, Andre S. Chan, Ferdinand Hendriks, Masato Ikegawa, Hiroshi Mukai, Keiichi Takemori
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Patent number: 7929246Abstract: Embodiments of the present invention prevent a magnetic disk drive from increasing in size and in manufacturing cost and reduces a positioning error of a magnetic head. An embodiment of a magnetic disk drive in accordance with the present invention includes: a disk-shaped magnetic disk that is rotated and driven; a magnetic head that reads and writes information to and from the magnetic disk, an arm that supports and moves the magnetic head; a spoiler that is close to a disk surface and extends in a radial direction of the disk; and a cabinet that houses these parts. The spoiler is disposed closer to an upstream side in a rotational direction of the disk than the arm and has a flow rate suppressing clearance positioned in a central portion in a peripheral direction of the spoiler, opened to both sides in an axial direction, and formed in a shape elongated in a radial direction of the disk.Type: GrantFiled: June 4, 2007Date of Patent: April 19, 2011Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Keiichi Takemori, Masato Ikegawa, Hiroshi Mukai, Hiroyuki Ishii, Yukinobu Abe
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Patent number: 7869159Abstract: A sickle-shaped disk drive spoiler for reducing turbulence of airflow in a hard disk drive is provided. The sickle-shaped spoiler includes a body portion for directing airflow generated by a rotating disk, the rotating disk comprising an inner diameter and an outer diameter and wherein the body portion of the spoiler directs airflow away from the outer diameter of the disk and wherein the body portion is curved to substantially mirror the outer diameter of the disk. The sickle-shaped spoiler also includes a first end portion for gradually directing airflow away from the body portion and towards the inner diameter and a second end portion for gradually directing airflow towards the body portion and towards the inner diameter.Type: GrantFiled: June 28, 2007Date of Patent: January 11, 2011Assignee: Hitachi Global Storage Technologies, Netherlands, B.V.Inventors: Yukinobu Abe, Andre S. Chan, Ferdinand Hendriks, Masato Ikegawa, Hiroshi Mukai, Keiichi Takemori
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Publication number: 20090002879Abstract: A sickle-shaped disk drive spoiler for reducing turbulence of airflow in a hard disk drive is provided. The sickle-shaped spoiler includes a body portion for directing airflow generated by a rotating disk, the rotating disk comprising an inner diameter and an outer diameter and wherein the body portion of the spoiler directs airflow away from the outer diameter of the disk and wherein the body portion is curved to substantially mirror the outer diameter of the disk. The sickle-shaped spoiler also includes a first end portion for gradually directing airflow away from the body portion and towards the inner diameter and a second end portion for gradually directing airflow towards the body portion and towards the inner diameter.Type: ApplicationFiled: June 28, 2007Publication date: January 1, 2009Inventors: Yukinobu Abe, Andre S. Chan, Ferdinand Hendriks, Masato Ikegawa, Hiroshi Mukai, Keiichi Takemori
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Patent number: 7457078Abstract: Embodiments of the invention reduce disk fluttering while ensuring good assemblability in a magnetic disk apparatus. A magnetic disk apparatus comprises a recording disk that is an information medium configured by one or plural disks; a motor causing the recording disk to rotate; a carriage supporting a head that records information to, or plays back information from, the recording disk; a casing housing the recording disk; and a shroud disposed surrounding an outer periphery of the recording disk. A groove that extends along the recording disk is formed, vertically asymmetrical with respect to an outer peripheral surface of the recording disk, in the shroud surface at a position where a corner portion formed by the outer peripheral surface and a top surface or bottom surface of the recording disk extends in a radial direction.Type: GrantFiled: September 9, 2005Date of Patent: November 25, 2008Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Masashi Fukaya, Yoshiyuki Hirono, Masato Ikegawa, Hiroshi Mukai
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Publication number: 20080043369Abstract: Embodiments of the present invention prevent a magnetic disk drive from increasing in size and in manufacturing cost and reduces a positioning error of a magnetic head. An embodiment of a magnetic disk drive in accordance with the present invention includes: a disk-shaped magnetic disk that is rotated and driven; a magnetic head that reads and writes information to and from the magnetic disk, an arm that supports and moves the magnetic head; a spoiler that is close to a disk surface and extends in a radial direction of the disk; and a cabinet that houses these parts. The spoiler is disposed closer to an upstream side in a rotational direction of the disk than the arm and has a flow rate suppressing clearance positioned in a central portion in a peripheral direction of the spoiler, opened to both sides in an axial direction, and formed in a shape elongated in a radial direction of the disk.Type: ApplicationFiled: June 4, 2007Publication date: February 21, 2008Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Keiichi Takemori, Masato Ikegawa, Hiroshi Mukai, Hiroyuki Ishii, Yukinobu Abe
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Patent number: 7314522Abstract: An apparatus having a crucible (1) for holding a raw material, a heating means (11) for heating the raw material in the crucible (1) and a crystal transporting means (17) for transporting a seed crystal (13) upwards from the inside of the crucible (1), which further comprises a heat conducting member (3) which extends upwards at least from the vicinity of the upper end of the crucible (1), surrounds a single crystal (15) formed, and is made of a material having heat conductivity, and an interface portion radiation heat blocking member (7) for blocking, at least during cooling after the formation of a single crystal, the radiation heat toward an upper portion above the interface between a taper portion (15a) of the formed single crystal (15) connecting with the seed crystal (13) and a straight bulge portion (15b) having a cylindrical shape connecting with the taper portion (15a) of the formed single crystal (15).Type: GrantFiled: June 12, 2003Date of Patent: January 1, 2008Assignee: Hitachi Chemical Co., Ltd.Inventors: Shigeki Hirasawa, Masato Ikegawa, Hiroyuki Ishibashi, Akihiro Gunji
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Publication number: 20060056107Abstract: Embodiments of the invention reduce disk fluttering while ensuring good assemblability in a magnetic disk apparatus. In one embodiment, a magnetic disk apparatus comprises a recording disk that is an information medium configured by one or plural disks; a motor causing the recording disk to rotate; a carriage supporting a head that records information to, or plays back information from, the recording disk; a casing housing the recording disk; and a shroud disposed surrounding an outer periphery of the recording disk. A groove that extends along the recording disk is formed, vertically asymmetrical with respect to an outer peripheral surface of the recording disk, in the shroud surface at a position where a corner portion formed by the outer peripheral surface and a top surface or bottom surface of the recording disk extends in a radial direction.Type: ApplicationFiled: September 9, 2005Publication date: March 16, 2006Applicant: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Masashi Fukaya, Yoshiyuki Hirono, Masato Ikegawa, Hiroshi Mukai
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Publication number: 20050217570Abstract: An apparatus having a crucible (1) for holding a raw material, a heating means (11) for heating the raw material in the crucible (1) and a crystal transporting means (17) for transporting a seed crystal (13) upwards from the inside of the crucible (1), which further comprises a heat conducting member (3) which extends upwards at least from the vicinity of the upper end of the crucible (1), surrounds a single crystal (15) formed, and is made of a material having heat conductivity, and an interface portion radiation heat blocking member (7) for blocking, at least during cooling after the formation of a single crystal, the radiation heat toward an upper portion above the interface between a taper portion (15a) of the formed single crystal (15) connecting with the seed crystal (13) and a straight bulge portion (15b) having a cylindrical shape connecting with the taper portion (15a) of the formed single crystal (15).Type: ApplicationFiled: June 12, 2003Publication date: October 6, 2005Inventors: Hirasawa Shigeki, Masato Ikegawa, Hiroyuki Ishibashi, Akihiro Gunji
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Publication number: 20040092044Abstract: In a semiconductor device manufacturing method, an ion current density distribution is measured in a plasma processing apparatus. It is then ascertained whether or not the measured distribution is in compliance with an ion current density distribution that becomes a criterion.Type: ApplicationFiled: October 31, 2003Publication date: May 13, 2004Inventors: Nobuyuki Mise, Tatehito Usui, Masato Ikegawa, Kazuo Nojiri, Kazuyuki Tsunokuni, Tetsuo Ono
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Patent number: 6656752Abstract: A wafer is exposed to a plasma. Here, the wafer includes a semiconductor or a conductor 1 provided on an insulator 6, an insulator 2 formed thereon and having a region the thickness of which has been made locally thin, and a 2nd conductor 4 provided on the insulator 2, one of the semiconductor or the conductor 1 and the 2nd conductor 4 having a 1st region from the surface of which a substantially total solid angle is formed, the other having a 2nd region a solid angle formed from the surface of which is made smaller than the 1st region. Then, a voltage is applied to the semiconductor or the conductor 1 and the 2nd conductor 4 so as to measure a time elapsing until the insulator 2 undergoes a dielectric breakdown. Moreover, the ion current density is determined from an electric charge required therefor and an area exposed onto the surface of the 2nd conductor 4.Type: GrantFiled: October 11, 2001Date of Patent: December 2, 2003Assignee: Hitachi, Ltd.Inventors: Nobuyuki Mise, Tatehito Usui, Masato Ikegawa, Kazuo Nojiri, Kazuyuki Tsunokuni, Tetsuo Ono
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Patent number: 6427621Abstract: In the plasma processing device for supplying electromagnetic waves to the first plate, generating plasma in the vacuum atmosphere between the first plate and the second plate which is arranged opposite to it, and processing the board loaded on the second plate, wherein the dielectric window for propagating electromagnetic waves is installed in the outer periphery of the first plate and in the window, the electromagnetic wave distribution corrector composed of an electrical conductor or a dielectric is embedded away from the first plate so that at least the side and bottom of the electromagnetic wave distribution corrector are not exposed in the aforementioned vacuum atmosphere. The electromagnetic wave distribution corrector corrects one-siding of the plasma density distribution at the center.Type: GrantFiled: April 14, 2000Date of Patent: August 6, 2002Assignee: Hitachi, Ltd.Inventors: Masato Ikegawa, Tsutomu Tetsuka, Ichiro Sasaki, Tatehito Usui, Hironobu Kawahara
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Patent number: 4464100Abstract: A scroll fluid apparatus for handling a compressible fluid and including stationary and orbiting scroll members. The stationary scroll member has a high-pressure central port located in the vicinity of the center thereof and having a profile which is defined by a boundary line located in a region defined by first and second circles both being centered at a point located on a straight line extending through the positions in which the inner ends of wraps are contact with the inner side walls of the opposing wraps, respectively, in the reference condition. The first circle has a diameter equal to the distance between the above-mentioned positions and the second circle has a diameter such that it is in contact with the inner side walls of the wraps.Type: GrantFiled: June 24, 1982Date of Patent: August 7, 1984Assignee: Hitachi, Ltd.Inventors: Shigeru Machida, Kenji Tojo, Masato Ikegawa, Masao Shiibayashi
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Patent number: 4443166Abstract: A scroll fluid apparatus including two scroll members, with one scroll member having a wrap and an annular portion located outside the wrap and having a height corresponding to the height of the wrap. The annular portion is contiguous at its surface in the form of a land with the surface of the wrap for a circumferential extent of within 180 degrees from the terminating end of the wrap, and a strip-shaped recess is formed in the land, with the strip-shaped form having an end portion maintained in communication with a low pressure zone surrounded by the annular portion of the scroll member.Type: GrantFiled: October 23, 1981Date of Patent: April 17, 1984Assignee: Hitachi, Ltd.Inventors: Masato Ikegawa, Kenji Tojo, Masao Shiibayashi