Patents by Inventor Mitsutoshi Yagoto
Mitsutoshi Yagoto 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: 6064128Abstract: A linear motor provided with a stator extending in a predetermined direction and a movable piece being movable along the stator, comprises:a field magnet arranged at the stator;an armature coil arranged at the movable piece and opposed to the field magnet; anda drive circuit for energizing the armature coil and thereby driving the movable piece, the drive circuit being formed at an electric circuit-board arranged on the movable piece.Type: GrantFiled: September 14, 1998Date of Patent: May 16, 2000Assignee: Minolta Co., Ltd.Inventors: Mitsutoshi Yagoto, Katsuhiro Nanba, Masamitsu Ishiyama
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Patent number: 6008552Abstract: A linear drive device provided with a magnetic sensor which is movable together with a movable piece for reading magnetic information of a position sensing magnetized portion on a stator, and a magnetic shield member for shielding the magnetic sensor from a magnetic flux applied by a drive magnetized portion on the stator. A linear drive device provided with a first sensor for sensing a variation in magnetic polarity of a field magnet on a stator, and a second sensor for reading information on an encoder scale, the first and second sensors being arranged at positions in a region around the stator except for a region above the upper surface of the stator.Type: GrantFiled: December 30, 1997Date of Patent: December 28, 1999Assignee: Minolta Co., Ltd.Inventors: Mitsutoshi Yagoto, Katsuhiro Nanba, Masamitsu Ishiyama, Toshio Kitaoka
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Patent number: 5990583Abstract: An image reading apparatus comprising a fluorescent lamp for lighting an original document; an inverter circuit for turning on the lamp; a plurality of optical part carrying sliders carrying the lamp on one of the sliders; and a magnetic encoder including a magnetism detecting element, wherein the detecting element and the inverter circuit (and an operation panel having a LCD) are spaced from each other and are located at opposite sides of a center of a travel region of the sliders.A shaft-type linear motor comprising a yoke stationarily arranged along the moving direction of a movable piece and made of a ferromagnetic material.A shaft-type linear motor comprising a shaft-type stator and a movable piece reciprocatable along the stator, wherein the stator and the movable piece are covered with a protection cover. The cover may be made of a ferromagnetic material.Type: GrantFiled: November 9, 1998Date of Patent: November 23, 1999Assignee: Minolta Co. , Ltd.Inventors: Katsuhiro Nanba, Toshio Kitaoka, Mitsutoshi Yagoto
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Patent number: 5955798Abstract: A linear motor including a stator having a drive field magnet extending in a uniform direction, a movable piece including an armature coil opposed to the field magnet, and a carrying member carrying a predetermined portion of the stator, wherein the stator is provided with predetermined magnetic poles for driving the movable piece only at a range in which a change in the magnetic field by the influence of the carrying member is prevented or suppressed.Type: GrantFiled: March 28, 1996Date of Patent: September 21, 1999Assignee: Minolta Co., Ltd.Inventors: Masamitsu Ishiyama, Makoto Izawa, Toshio Kitaoka, Yasuhiro Matsumoto, Mitsutoshi Yagoto
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Patent number: 5913091Abstract: An image reading apparatus includes one or more sliders which carry optical parts and can linearly reciprocate in a predetermined direction. The apparatus optically scans and thereby reads an image on an original document located at a predetermined position. The image reading apparatus includes a magnetic encoder for detecting positions of the sliders.Type: GrantFiled: May 21, 1997Date of Patent: June 15, 1999Assignee: Minolta Co., Ltd.Inventors: Katsuhiro Nanba, Toshio Kitaoka, Mitsutoshi Yagoto, Toshikazu Suzuki
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Patent number: 5909066Abstract: A linear motor includes a rod-like stator having a field magnet, and a movable piece having an armature coil fitted around the field magnet and arranged inside a cylindrical movable piece yoke. The movable piece is provided at its opposite ends with bearings. The armature coil is arranged between the bearings. The cylindrical movable piece yoke is provided at ends of a lower portion in the gravity direction with projections extending in the movable piece moving direction.Type: GrantFiled: March 29, 1996Date of Patent: June 1, 1999Assignee: Minolta Co., Ltd.Inventors: Katsuhiro Nanba, Masamitsu Ishiyama, Tetsuya Kagawa, Mitsutoshi Yagoto, Makoto Izawa, Toshio Kitaoka, Yasuhiro Matsumoto
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Patent number: 5801462Abstract: The invention is directed to a linear motor and a image reading apparatus. The motor comprises a rod-like stator formed of a magnetizable rod-like member provided by magnetization with a drive field magnet and a plurality of magnet portions providing multiple kinds of position information; a movable piece being movable along said stator and having an armature coil opposed to said field magnet; and a sensor reading the position information from the plurality of magnet portions. The apparatus includes motors such as the foregoing linear motors as drive source for sliders to be driven for scanning a document image.Type: GrantFiled: March 28, 1996Date of Patent: September 1, 1998Assignee: Minolta Co., Ltd.Inventors: Mitsutoshi Yagoto, Hideyuki Kurahashi, Masanori Murakami, Katsuhiro Nanba, Masamitsu Ishiyama, Toshikazu Suzuki
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Patent number: 5796186Abstract: A single sided servo apparatus comprises a linear motor and a longitudinal carriage which is connected to the linear motor at one end thereof. The linear motor comprises a stator including field magnets arranged linearly and a movable piece including armature coils. The field magnets have a trapezoid-like magnetic flux distribution. An arrangement pattern of the field magnets has a relative tilted angle to an arrangement pattern of the armature coils, so that a free end of the carriage precedes the other end thereof connected to the linear motor. Then, the thrust has a small variation and generates a stable thrust of the servo apparatus.Type: GrantFiled: March 29, 1996Date of Patent: August 18, 1998Assignee: Minolta Co., Ltd.Inventors: Katsuhiro Nanba, Mitsutoshi Yagoto, Masamitsu Ishiyama, Makoto Izawa, Toshio Kitaoka, Yasuhiro Matsumoto
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Patent number: 5416608Abstract: An image reading apparatus for reading a projected image by a line sensor formed in a linear shape. An image reading apparatus has an illumination system, an original supporting member, a projection lens and a line sensor formed in a linear shape. The illumination system includes a light guide formed of a cylindrically shaped light-transmitting material, a light source for introducing light into the light guide from the lengthwise direction of the light guide, a light-diffusing portion formed on the circumference of the light guide in the lengthwise direction of the light guide and a slit portion positioned opposite the light-diffusing portion.Type: GrantFiled: July 1, 1992Date of Patent: May 16, 1995Assignee: Minolta Camera Kabushiki KaishaInventors: Toshihiko Ueda, Kunihiko Konoma, Tetsuji Niikawa, Mitsutoshi Yagoto
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Patent number: 5398096Abstract: An automated focus point control device wherein the focus point is aligned by adjusting a projection optical unit based on signals outputted from a sensor which detects the light transmitted through a boundary portion of a margin portion and a frame portion of a film.An automated focus point control device wherein the focus position is determined by detecting a projected image contrast on a priority basis at three points including the center position and lateral positions at both sides of the center position within the adjusting range of a projecting system.Type: GrantFiled: June 9, 1993Date of Patent: March 14, 1995Assignee: Minolta Co., Ltd.Inventor: Mitsutoshi Yagoto
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Patent number: 5204693Abstract: A image recording apparatus for recording images on a film by a laser beam. The image recording apparatus include a light-emitting element, a monitor element for monitoring the intensity of the light emitted from the light-emitting element, a control means for controlling the intensity of the light emitted for the light-emitting element, and a selection means to select the intensity of the light emitted from the light-emitting element with a selection portion. The monitor element is insulated from the selection portion to keep out of the influence of the external noise.Type: GrantFiled: February 26, 1991Date of Patent: April 20, 1993Assignee: Minolta Camera Kabushiki KaishaInventor: Mitsutoshi Yagoto
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Patent number: 5062094Abstract: An optical head for use in an optical disk system for irradiating a laser beam on an optical disk for recording or reproducing information. The optical head comprises a first and a second diffraction gratings for forming a moire pattern for detecting a focusing error, and a third diffraction grating for detecting a tracking error. The third diffraction grating has strips extending in a direction perpendicular to directions in which the strips of the first and second diffraction gratings extend.Type: GrantFiled: November 6, 1989Date of Patent: October 29, 1991Assignee: Minolta Camera Kabushiki KaishaInventors: Akiyoshi Hamada, Mitsutoshi Yagoto, Masanori Murakami
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Patent number: 5019701Abstract: An automatic focusing apparatus having an objective lens for forming a beam from a semiconductor laser as a spot image on an image subjecting face, a driving unit for driving the objective lens in a direction parallel to an optical axis thereof, a beam splitter disposed between the semiconductor laser and the objective lens, a pair of grids for generating a moire image displaced in a travelling path of a beam returning from the image subjecting face and reflected by an inclined prism face of the beam splitter, a photo detector for detecting the moire image generated by the grids and an control unit for evaluating a focusing error based on a variation in the moire image pattern and for controlling the driving unit so as to correct the focusing error. The first grid and the second grid are interspaced in parallel to each other along a beam axis and angularly displaced from each other about the beam axis.Type: GrantFiled: September 10, 1990Date of Patent: May 28, 1991Assignee: Minolta Camera Kabushiki KaishaInventors: Mitsutoshi Yagoto, Masayuki Mino
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Patent number: 5006874Abstract: Image recording apparatus wherein a film is exposed to a laser beam so that an image is recorded on the film, the apparatus having a cartridge for winding the image-recorded film. The cartridge comprises a reel, a first and a second casing for housing the reel in such a manner as the reel can be dismounted, the casings capable of being integrated and disintegrated by moving in a direction perpendicular to the axis of the reel, a first guide unit disposed in the first casing for forcing the film wound around the reel toward the center of the reel elastically and a second guide unit disposed in the second casing for forcing the film wound around the reel toward the center of the reel.Type: GrantFiled: June 28, 1990Date of Patent: April 9, 1991Assignee: Minolta Camera Kabushiki KaishaInventors: Masanori Murakami, Akiyoshi Hamada, Mitsutoshi Yagoto, Shinichi Mori
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Patent number: 4996541Abstract: A film conveying apparatus includes a portion for feeding a film, a portion for drawing the film and a slack detecting apparatus for detecting slack of the film therebetween. The slack detecting apparatus includes a light emitting portion and the light receiving portion, and when the light from the light emitting portion to the light receiving portion is intercepted by the film, it is determined that the film has slack. When the slack of the film is detected by the slack detecting apparatus, emission of light from the light emitting portion is stopped for a prescribed time period.Type: GrantFiled: April 18, 1990Date of Patent: February 26, 1991Assignee: Minolta Camera Kabushiki KaishaInventors: Shinichi Mori, Akiyoshi Hamada, Mitsutoshi Yagoto, Masanori Murakami
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Patent number: 4972075Abstract: An automatic focusing system for forcusing on an optical disk, the system including a laser beam source, an objective lens, a photodetector for detecting a focusing error, a beam splitter disposed between the laser beam source and the objective lens and a pair of diffraction gratings disposed between the beam splitter and the photodetector means so as to form a moire pattern on the photodetector means. The laser beam produced from the laser beam source travels to the optical disk through the objective lens and then is reflected off the optical back through the objective lens travels to the photodetector. A converging lens may be disposed between the beam splitter and the gratings or between the two gratings. Further, a single optical member may be constituted so as to form a moire pattern on the photodetector. The optical member includes a transparent base plate for supporting the two gratings on the respective surfaces thereof.Type: GrantFiled: July 31, 1989Date of Patent: November 20, 1990Assignee: Minolta Camera Kabushiki KaishaInventors: Akiyoshi Hamada, Mitsutoshi Yagoto, Masanori Murakami
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Patent number: 4959824Abstract: An information record/pickup head assembly for an optical information recording and/or reproducing apparatus using an optical information storage disk, comprising a stationary optical unit and a movable optical unit movable with respect to the information storage disk loaded, wherein the stationary optical unit emits a beam of light toward the movable optical unit which then re-directs the incident beam toward the information storage disk while returning to the stationary optical unit the beam of light reflected from the information storage disk. A focusing operation is carried out in the stationary optical unit.Type: GrantFiled: July 29, 1988Date of Patent: September 25, 1990Assignee: Minolta Camera Kabushiki KaishaInventors: Toshihiko Ueda, Kouitirou Tutiyasu, Kazuyuki Yoshida, Mitsutoshi Yagoto
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Patent number: 4958169Abstract: A laser recorder applicable to computer output microfilm recording apparatus comprises: a housing, a film feed unit having a film cassette loaded with a rolled heat development film; a film take-up unit for taking up the heat development film on a reel or on a tray, including a film storing mechanism for storing cut films sequentially; a main driving unit for driving the heat development film for advancing at a fixed speed for auxiliary scanning for recording image information on the heat development film, including a slackened film relief mechanism for eliminating slackened film around the main driving unit and a stepping motor driving current control circuit for driving the main driving unit at a low and fixed speed; loop detectors for preventing film feed force and film delivery force from working on the main driving unit, an image information recording unit for main scanning, having a laser optical system for scanning the heat development film across the width thereof to record image information recordedType: GrantFiled: September 26, 1988Date of Patent: September 18, 1990Assignees: Minolta Camera Kabushiki Kaisha, Nisca CorporationInventors: Akiyoshi Hamada, Mitsutoshi Yagoto, Yutaka Watanabe, Shuji Mochizuki, Masayuki Mino, Yutaka Tanaka, Kyoji Tachikawa
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Patent number: 4891653Abstract: An image forming apparatus for forming in series a plurality of images on a photosensitive film of the long roll type having a film transporting mechanism using a stepping motor, a microstep driver for controllably driving the stepping motor in a plurality of microsteps constituting one step unit of the stepping motor and an imaging device for forming an image on the film being transported by the film transporting mechanism.Type: GrantFiled: April 25, 1988Date of Patent: January 2, 1990Assignee: Minolta Camera Kabushiki KaishaInventors: Akiyoshi Hamada, Mitsutoshi Yagoto
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Patent number: 4878067Abstract: A laser recorder applicable to computer output microfilm recording apparatus, which comprises; a housing, a film feeding unit having a film cassette containing a rolled heat development film and disposed in the lower section of the housing, a film take-up unit taking up the heat developement film on a reel or on a tray in sheet films, a main driving unit and driving the heat development film for running at a fixed speed for auxiliary scanning for recording image information on the heat development film, an image information recording unit for main scanning, having a laser optical system for scanning the heat development film across the width thereof to record image information thereon, and a heat developement unit for heat-developing the image information recorded on the heat development film.Type: GrantFiled: November 4, 1988Date of Patent: October 31, 1989Assignee: Minolta Camera Kabushiki KaishaInventors: Mitsutoshi Yagoto, Akiyoshi Hamada, Masayuki Mino, Yutaka Tanaka, Yutaka Watanabe