FujiFilm Assigned Twelve Patents

Magnetic tape
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,614,834) developed by Morooka, Atsushi, and Tada, Toshio, Minami-ashigara, Japan, for a “magnetic tape.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Provided is a magnetic tape in which a vertical direction squareness ratio and/or a longitudinal direction squareness ratio obtained by measurement performed by sweeping an external magnetic field in the magnetic tape in a predetermined range by a vibrating sample magnetometer is 0.70 to 1.00, and A calculated by Expression 1 is equal to or smaller than 5.0%. In Expression 1, n represents the number of measurement points measured at magnetic field strength of -40 kA/m to 40 kA/m during the sweeping and is 52, Mr(Hex) represents a magnetization quantity measured at magnetic field strength Hex, and .mu. represents an arithmetical mean of Mr(Hex) obtained by measurement performed in the range of the magnetic field strength during the sweeping. .times..times..times..about..times..times..times..times..function..mu..mu- ..times..times. ##EQU00001##.”

The patent application was filed on September 27, 2017 (15/716,622).

Tape storage device and control method using quality information
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,613,775) developed by Tokai, Naoaki, Hashimoto, Hirokazu,and Sumiya, Yosuke, Kanagawa, Japan, for “tape storage device and control method using quality information.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A recording control device reads tape quality information recorded on an RFID tag included in a recording tape cartridge, acquires drive quality information indicating quality of each of a plurality of tape drives that are loading targets of the recording tape cartridge, and prohibits reading or writing of data from or to the recording tape using the tape drive in a combination of which the quality is lower than predetermined quality among combinations of quality of the recording tape cartridge indicated by the read tape quality information and quality of each of the plurality of tape drives indicated by the acquired drive quality information.”

The patent application was filed on April 17, 2018 (15/954,628).

Magnetic tape, manufacturing and recording/reproducing system
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,607,644) developed by Suzuki, Hodaka, and Akano, Yoichi, Kanagawa, Japan, for “magnetic tape, manufacturing method of magnetic tape, manufacturing device of magnetic tape, and recording and reproducing system.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A magnetic tape includes: a servo band on which servo patterns are repeatedly formed in a longitudinal direction thereof, each of the servo patterns including a first magnetization region formed to be tilted with respect to a width direction of the servo band by a predetermined angle along the width direction of the servo band, and a second magnetization region not parallel to the first magnetization region along the width direction of the servo band, wherein at least one of the first magnetization region or the second magnetization region is formed by decreasing the number of linear patterns from a predetermined plural number of linear patterns and changing a position of the linear pattern to be removed, in accordance with information that is an embedding target so that the information is embedded.”

The patent application was filed on May 16, 2019 (16/414,764).

Method for manufacturing reel
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,603,824) developed by Kagawa, Yusuke, Kanagawa, Japan, for “method for manufacturing reel.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A method for manufacturing a reel includes molding a reel configuration component that is made of resin and includes a reel hub with an outer peripheral face for winding a recording tape onto, after the molding and prior to the reel configuration component cooling and shrinking, embedding a reinforcement ring into the reel hub, and after the embedding, cooling and shrinking the reel configuration component and fixing the reinforcement ring to the reel hub.”

The patent application was filed on November 28, 2016 (15/361,501).

Magnetic tape, manufacturing and recording/reproducing system
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,600,439) developed by Suzuki, Hodaka, and Akano, Yoichi, Kanagawa, Japan, for “magnetic tape, manufacturing method of magnetic tape, manufacturing device of magnetic tape, and recording and reproducing system.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Provided is a magnetic tape, in which servo patterns, each including a first magnetization region formed to be tilted with respect to a width direction of a servo band by an angle .theta. along the width direction of the servo band and a second magnetization region not parallel to the first magnetization region along the width direction of the servo band, are repeatedly formed in a longitudinal direction of the servo band, the magnetic tape is used in a recording and reproducing system which uses a reproducing element for reproducing the servo pattern, a width of which satisfies W1.ltoreq.(1/tan .theta.).times.stripe width T of the servo pattern, and the angle .theta. is greater than 25.degree. and equal to or smaller than 45.degree.”

The patent application was filed on March 7, 2019 (16/296,214).

Recording system and recording
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,586,145) developed by Kagawa, Yusuke, Kanagawa, Japan, for “recording system and recording method.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A recording system includes: a reading part that reads information recorded on a first recording medium that is provided at a predetermined position on an outer circumferential surface of a recording tape cartridge, the information being visually recognizable from the outside, and a recording part that records the information read by the reading part on a second recording medium that is provided in the recording tape cartridge, of which recorded information is readable in a non-contact manner, in a case where the recording tape cartridge is first accessed.”

The patent application was filed on December 8, 2017 (15/835,470).

Magnetic tape and manufacturing
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,573,341) developed by Tada, Toshio, Kasada, Norihito, and Oyanagi, Masahito, Minami-ashigara, Japan, for “magnetic tape and method of manufacturing the same.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”The magnetic tape has a nonmagnetic layer containing nonmagnetic powder and binder on a nonmagnetic support and a magnetic layer containing ferromagnetic powder and binder on the nonmagnetic layer, wherein a fatty acid ester is contained in at least the magnetic layer, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, the ferromagnetic hexagonal ferrite powder has a crystallite volume as determined by X-ray diffraction analysis ranges from 1,000 nm.sup.3 to 2,400 nm.sup.3, and a ratio of the crystallite size D.sub.x(107) obtained from a diffraction peak of a (107) plane to a particle size in a direction of an easy axis of magnetization D.sub.TEM as determined by observation with a transmission electron microscope, D.sub.x(107)/D.sub.TEM, is greater than or equal to 1.1, and .DELTA.SFD in a longitudinal direction of the magnetic tape as calculated with Equation 1: .DELTA.SFD=SFD.sub.25.degree. C.-SFD.sub.-190.degree. C., ranges from 0.50 to 1.60.”

The patent application was filed on December 22, 2016 (15/388,911).

Magnetic tape device and magnetic reproducting employing TMR head and tape with characterized magnetic layer
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,573,338) developed by Kasada, Norihito, and Ozawa, Eiki, Minami-ashigara, Japan, for “magnetic tape device and magnetic reproducting method employing TMR head and tape with characterized magnetic layer.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A magnetic tape device includes a magnetic tape, and a reproducing head, in which the reproducing head is a Tunneling Magnetoresistive (TMR) head, the center line average surface roughness Ra measured regarding the surface of the magnetic layer of the magnetic tape is equal to or smaller than 2.0 nm, the logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the magnetic layer is equal to or smaller than 0.050, and the ratio (Sdc/Sac) of an average area Sdc of a magnetic cluster of the magnetic tape in a DC demagnetization state and an average area Sac of a magnetic cluster of the magnetic tape in an AC demagnetization state measured with a magnetic force microscope is 0.80 to 1.30.”

The patent application was filed on February 20, 2018 (15/900,141).

Head tracking servo for magnetic tape recording
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,546,605) developed by Ozawa, Eiki, and Kasada, Norihito, Minami-ashigara, Japan, for a “head tracking servo method for magnetic tape recording device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”The magnetic tape device includes a magnetic tape and a TMR head, servo head, in which the magnetic tape includes a non-magnetic support, and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, an intensity ratio of a peak intensity Int(110) of a diffraction peak of a (110) plane with respect to a peak intensity Int(114) of a diffraction peak of a (114) plane of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, and a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00.”

The patent application was filed on March 14, 2018 (15/920,518).

Magnetic tape device and reproducing method employing TMR reproducing head and tape with characterized XRD intensity ratio
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,546,602) developed by Kasada, Norihito, and Ozawa, Eiki, Minami-ashigara, Japan, for “magnetic tape device and reproducing method employing TMR reproducing head and tape with characterized XRD intensity ratio.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”The magnetic tape device includes a Tunneling Magnetoresistiv (TMR) head as a reproducing head, and a magnetic tape which includes a non-magnetic support, and a magnetic layer including ferromagnetic hexagonal ferrite powder and a binding agent on the non-magnetic support, an XRD intensity ratio, Int(110)/Int(114)) of a hexagonal ferrite crystal structure obtained by an X-ray diffraction analysis of the magnetic layer by using an In-Plane method is 0.5 to 4.0, a vertical direction squareness ratio of the magnetic tape is 0.65 to 1.00, a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 2.0 nm, and a logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the magnetic layer is equal to or smaller than 0.050.”

The patent application was filed on February 20, 2018 (15/899,587).

Magnetic tape having characterized magnetic layer
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,540,996) developed by Ozawa, Eiki, Kasada, Norihito, Oyanagi, Masahito, and Tada, Toshio, Minami-ashigara, Japan, for “magnetic tape having characterized magnetic layer and magnetic tape device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A magnetic tape has a magnetic layer containing ferromagnetic powder and binder on a nonmagnetic support. The magnetic layer contains a fatty acid ester. The full width at half maximum of the spacing distribution as measured by optical interferometry on the magnetic layer side surface of the magnetic tape before vacuum heating the magnetic tape is greater than 0 nm but less than or equal to 5.0 nm. The full width at half maximum of the spacing distribution after vacuum heating the magnetic tape is greater than 0 nm but less than or equal to 5.0 nm. The difference between the spacing S.sub.after after vacuum heating the magnetic tape and the spacing S.sub.before before vacuum heating the magnetic tape, S.sub.after-S.sub.before, is greater than 0 nm but less than or equal to 8.0 nm.”

The patent application was filed on September 29, 2016 (15/280,195).

Magnetic tape having characterized magnetic layer and back coating layer
FujiFilm Corporation, Tokyo, Japan , has been assigned a patent (10,529,368) developed by Kasada, Norihito, Minami-ashigara, Japan, for “magnetic tape having characterized magnetic layer and back coating layer.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A magnetic tape includes: a non-magnetic support, a magnetic layer on one surface side of the non-magnetic support, and a back coating layer on the other surface side. The center line average surface roughness Ra measured regarding the surface of the magnetic layer is 1.0 nm to 1.8 nm. The magnetic layer includes ferromagnetic hexagonal ferrite powder and non-magnetic powder. The tilt cos .theta. of the ferromagnetic hexagonal ferrite powder with respect to a surface of the magnetic layer acquired by cross section observation performed using a scanning transmission electron microscope is 0.85 to 1.00. Further, the logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the back coating layer is less than or equal to 0.060.”

The patent application was filed on August 30, 2017 (15/690,400).