Patents by Inventor Minoru Sueki
Minoru Sueki 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).
-
Patent number: 7881013Abstract: A recording tape cartridge houses a reel including a hub around which recording tape is wound and at least part of which is formed by a resin. The rigidity (modulus of elasticity) y in the radial direction of the hub and the creep deformation ratio x of the recording tape satisfy the conditions of y?87.3 exp(21.6x) and x>0.1. By setting the rigidity of the reel hub to match the creep deformation ratio of the recording tape so as to satisfy this relationship, creep deformation of the recording tape can be controlled at the smallest cost.Type: GrantFiled: January 18, 2008Date of Patent: February 1, 2011Assignee: Fujifilm CorporationInventors: Ren Ishikawa, Minoru Sueki
-
Publication number: 20080191081Abstract: A recording tape cartridge houses a reel including a hub around which recording tape is wound and at least part of which is formed by a resin. The rigidity (modulus of elasticity) y in the radial direction of the hub and the creep deformation ratio x of the recording tape satisfy the conditions of y?87.3 exp(21.6x) and x>0.1. By setting the rigidity of the reel hub to match the creep deformation ratio of the recording tape so as to satisfy this relationship, creep deformation of the recording tape can be controlled at the smallest cost.Type: ApplicationFiled: January 18, 2008Publication date: August 14, 2008Applicant: FUJIFILM CORPORATIONInventors: Ren ISHIKAWA, Minoru SUEKI
-
Patent number: 7379258Abstract: A method for inspecting a head unit moving device is characterized by having the steps of running a inspection use tape in which a servo signal is written displaced in a width direction of a magnetic tape at a predetermined frequency and amplitude; measuring a position of a head unit practically moved in a width direction of the inspection use tape in response to the servo signal; and calculating a difference between the position and a position to be instructed so as to move the head unit in response to the servo signal, wherein the head unit moving device moves the head unit with a servo signal reading head, a data signal recording head, and a data signal reproducing head in the width direction of the magnetic tape in response to the servo signal read from the magnetic tape by the servo signal reading head.Type: GrantFiled: December 4, 2003Date of Patent: May 27, 2008Assignee: FUJIFILM CorporationInventors: Toru Nakao, Minoru Sueki, Takahisa Izumida
-
Patent number: 7154694Abstract: Disclosed is a servo writer which forms servo bands on information recording media so as to enable a drive to track the servo bands with great accuracy by using a recording/reproducing head. The servo writer includes a driving mechanism for running a tape-shaped information recording medium, a servo pattern writing means for writing servo patterns on the running tape-shaped information recording medium, thereby forming servo bands thereon, and a tape edge forming mechanism for cutting evenly an edge of the running tape-shaped information recording medium, so that the edge becomes parallel to the servo bands.Type: GrantFiled: January 27, 2005Date of Patent: December 26, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Minoru Sueki, Toru Nakao, Takahisa Izumida
-
Patent number: 7110211Abstract: Disclosed is a magnetic tape which contributes to a high recording density, and which achieves an enhanced flexibility in a width of a data track and a data format. The magnetic tape includes servo tracks being recorded thereon. These servo tracks contain respective servo signals, and are arranged lengthwise and adjacent to one another over a whole of a width or a part of the magnetic tape. Further, each of the servo tracks includes address signals being recorded thereon at predetermined intervals in isolation from the corresponding servo signals. These address signals indicate their respective locations of corresponding one of the servo tracks and their respective lengthwise locations on the magnetic tape. In addition, the servo signals are read from the respective servo bands, and are used to adjust tracking of a magnetic head on the magnetic tape.Type: GrantFiled: October 13, 2004Date of Patent: September 19, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Minoru Sueki, Tetsuji Nishida
-
Patent number: 7014927Abstract: A magnetic recording medium comprising: a support; and at least one magnetic layer containing a ferromagnetic powder and a binder, wherein a center line average roughness of the magnetic layer measured with a laser interferometer is from 1 to 3 nm, a skewness is 0 or more and less than 1.0, and a maximum difference of elevation of peak/valley is 50 nm or less.Type: GrantFiled: December 18, 2003Date of Patent: March 21, 2006Assignee: Fuji Photo Film Co., Ltd.Inventors: Minoru Sueki, Ryota Suzuki
-
Publication number: 20050264935Abstract: An information recording tape including a data-recording area and a non-data-recording area, with the data-recording area having a center-line average surface roughness Ra smaller than 3 nm and at most 100/mm2 of protuberances standing at least 20 nm high, and with the non-data-recording area having a center-line average surface roughness Ra greater than 2 nm and more than 100/mm2 of protuberances standing at least 20 nm high.Type: ApplicationFiled: May 27, 2005Publication date: December 1, 2005Inventors: Minoru Sueki, Kiyomi Ejiri
-
Publication number: 20050195516Abstract: Disclosed is a servo writer which forms servo bands on information recording media so as to enable a drive to track the servo bands with great accuracy by using a recording/reproducing head. The servo writer includes a driving mechanism for running a tape-shaped information recording medium, a servo pattern writing means for writing servo patterns on the running tape-shaped information recording medium, thereby forming servo bands thereon, and a tape edge forming mechanism for cutting evenly an edge of the running tape-shaped information recording medium, so that the edge becomes parallel to the servo bands.Type: ApplicationFiled: January 27, 2005Publication date: September 8, 2005Inventors: Minoru Sueki, Toru Nakao, Takahisa Izumida
-
Patent number: 6916521Abstract: A cleaning medium for a magnetic recording apparatus is disclosed, comprising a nonmagnetic support having provided thereon a lower coating layer mainly containing a nonmagnetic inorganic powder and a binder, and a cleaning layer containing at least a ferromagnetic inorganic powder and a binder provided on the lower coating layer, wherein the thickness of the cleaning layer is from 0.05 to 1.0 ?m, the thickness of the lower coating layer is from 0.2 to 5.0 ?m, the thickness of the support is from 2.0 to 10 ?m, and the thickness in total of the cleaning medium (cleaning tape) is from 4.0 to 15 ?m.Type: GrantFiled: December 13, 2001Date of Patent: July 12, 2005Assignee: Fuji Photo Film Co., Ltd.Inventors: Tadashi Ishiguro, Yutaka Kakuishi, Satoru Hayakawa, Minoru Sueki
-
Publication number: 20050117246Abstract: Disclosed is a magnetic tape which contributes to a high recording density, and which achieves an enhanced flexibility in a width of a data track and a data format. The magnetic tape includes servo tracks being recorded thereon. These servo tracks contain respective servo signals, and are arranged lengthwise and adjacent to one another over a whole of a width or a part of the magnetic tape. Further, each of the servo tracks includes address signals being recorded thereon at predetermined intervals in isolation from the corresponding servo signals. These address signals indicate their respective locations of corresponding one of the servo tracks and their respective lengthwise locations on the magnetic tape. In addition, the servo signals are read from the respective servo bands, and are used to adjust tracking of a magnetic head on the magnetic tape.Type: ApplicationFiled: October 13, 2004Publication date: June 2, 2005Inventors: Minoru Sueki, Tetsuji Nishida
-
Publication number: 20050117493Abstract: Disclosed is an optical tape which contributes to a high recording density, and which achieves an enhanced flexibility in a width of a data track and a data format. The optical tape includes servo tracks being recorded thereon. These servo tracks contain respective servo signals, and are arranged lengthwise and adjacent to one another over a whole of a width or a part of the optical tape. Further, each of the servo tracks includes address signals being recorded thereon at predetermined intervals in isolation from the corresponding servo signals. These address signals indicate their respective locations of corresponding one of the servo tracks and their respective lengthwise locations on the optical tape. In addition, the servo signals are read from the respective servo tracks, and are used to adjust tracking on the optical tape.Type: ApplicationFiled: November 12, 2004Publication date: June 2, 2005Inventors: Minoru Sueki, Tetsuji Nishida
-
Patent number: 6881474Abstract: A magnetic tape favorably employable for recording computer data, comprising a support web, a magnetic layer and a back-coat layer and having a thickness of 3 to 10 ?m, should have a curl having a radius of curvature of greater than 10 mm in its longitudinal direction and a curl having a radius of curvature of greater than 40 mm in its width direction, wherein the curl in the width direction gives a convex surface on the side of the magnetic layer.Type: GrantFiled: July 29, 2002Date of Patent: April 19, 2005Assignee: Fuji Photo Film Co., Ltd.Inventors: Yutaka Kakuishi, Masatoshi Takahashi, Minoru Sueki
-
Publication number: 20040160697Abstract: A method for inspecting a head unit moving device is characterized by having the steps of running a inspection use tape in which a servo signal is written displaced in a width direction of a magnetic tape at a predetermined frequency and amplitude; measuring a position of a head unit practically moved in a width direction of the inspection use tape in response to the servo signal; and calculating a difference between the position and a position to be instructed so as to move the head unit in response to the servo signal, wherein the head unit moving device moves the head unit with a servo signal reading head, a data signal recording head, and a data signal reproducing head in the width direction of the magnetic tape in response to the servo signal read from the magnetic tape by the servo signal reading head.Type: ApplicationFiled: December 4, 2003Publication date: August 19, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Toru Nakao, Minoru Sueki, Takahisa Izumida
-
Patent number: 6767610Abstract: A magnetic tape includes: a back coating layer containing a carbon black; a support; a non-magnetic layer containing a non-magnetic powder and a binder, which is substantially non-magnetic; and a magnetic layer containing a ferromagnetic powder and a binder, in this order, wherein the magnetic tape is a magnetic tape for recording a signal with a 10 to 100 Mbit/cm2 surface recording density; the magnetic tape has a temperature expansion coefficient in a width direction thereof of a 0.0015%/° C. or less, a humidity expansion coefficient of 0.0015%/% RH or less, an offset yield strength in a longitudinal direction thereof of 10N or more, a rupture strength of 30 N or more; and the support has a center plane average roughness on a coating surface side of the magnetic layer of 1.0 nm or less, a center plane average roughness on a coating surface side of the back coating layer of 3.0 to 9.Type: GrantFiled: December 14, 2001Date of Patent: July 27, 2004Assignee: Fuji Photo Film Co., Inc.Inventors: Masatoshi Takahashi, Minoru Sueki, Toshiyuki Kitahara
-
Publication number: 20040131892Abstract: A magnetic recording medium comprising: a support; and at least one magnetic layer containing a ferromagnetic powder and a binder, wherein a center line average roughness of the magnetic layer measured with a laser interferometer is from 1 to 3 nm, a skewness is 0 or more and less than 1.0, and a maximum difference of elevation of peak/valley is 50 nm or less.Type: ApplicationFiled: December 18, 2003Publication date: July 8, 2004Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Minoru Sueki, Ryota Suzuki
-
Patent number: 6721123Abstract: A magnetic tape includes two servo tracks respectively extending in the longitudinal direction of the magnetic tape from the tape-width-direction two end portions of the magnetic tape, and a data area interposed between the two servo tracks. The azimuth angle &thgr;° of the data track of the data area satisfies an equation of 0 ≤ θ ≤ tan - 1 ⁡ ( 10 ⁢ p a × L ) , where a data track pitch is expressed as p (m), a magnetic tape width is expressed as L (m) and the greatest dimension change rate is expressed as (a) (%).Type: GrantFiled: September 6, 2001Date of Patent: April 13, 2004Assignee: Fuji Photo Film Co., Ltd.Inventors: Minoru Sueki, Kiyomi Ejiri, Kiyoo Morita
-
Patent number: 6667119Abstract: A magnetic recording medium having on a support at least two magnetic layers that include an uppermost magnetic layer for recording information and a lower magnetic layer for recording servo signals, wherein the uppermost magnetic layer has a coercive force Hc(U) [KA/m] at most 265 times as much as a saturated magnetic flux density Bs[T] of a recording head used for information recording and the lower magnetic layer has a coercive force Hc(L) [KA/m] at least 159 times as much as the saturated magnetic flux density Bs[T] of the recording head used for information recording, thereby ensuring highly accurate servo write and elevation of recording density.Type: GrantFiled: September 13, 2001Date of Patent: December 23, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Kiyomi Ejiri, Minoru Sueki
-
Patent number: 6652999Abstract: A magnetic recording medium comprising two or more magnetic layers provided on a support, wherein an easily magnetizable axis of an uppermost magnetic layer and an easily magnetizable axis of a lower magnetic layer are oriented in directions crossing each other at right angles, which can attain both a highly precise servo write and a higher recording density.Type: GrantFiled: September 14, 2001Date of Patent: November 25, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Kiyomi Ejiri, Minoru Sueki, Tsutomu Sugisaki
-
Patent number: 6620483Abstract: Provided is a magnetic recording medium suited to magnetic recording and reproduction systems employing linear methods and incorporating magnetoresistive reproduction heads. The magnetic recording medium comprising a magnetic layer for servo signal recording, a nonmagnetic layer, and a magnetic layer for information recording in this order on a nonmagnetic support, wherein said magnetic layer for information recording exhibits a coercivity of at least 7.96 kA/m (100 Oe) higher than a coercivity of said magnetic layer for servo signal recording and an interface roughness at the interface of said magnetic layer for servo signal recording and said nonmagnetic layer ranges from 7 to 12 nm.Type: GrantFiled: March 25, 2002Date of Patent: September 16, 2003Assignee: Fuji Photo Film Co., Ltd.Inventors: Akira Kasuga, Minoru Sueki
-
Publication number: 20030054204Abstract: Provided is a magnetic recording medium suited to magnetic recording and reproduction systems employing linear methods and incorporating magnetoresistive reproduction heads. The magnetic recording medium comprising a magnetic layer for servo signal recording, a nonmagnetic layer, and a magnetic layer for information recording in this order on a nonmagnetic support, wherein said magnetic layer for information recording exhibits a coercivity of at least 7.96 kA/m (100 Oe) higher than a coercivity of said magnetic layer for servo signal recording and an interface roughness at the interface of said magnetic layer for servo signal recording and said nonmagnetic layer ranges from 7 to 12 nm.Type: ApplicationFiled: March 25, 2002Publication date: March 20, 2003Applicant: FUJI PHOTO FILM CO., LTD.Inventors: Akira Kasuga, Minoru Sueki