FujiFilm Assigned Twelve Patents

Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12406693) developed by Miyamura; Tsuyoshi, Yokohama, Japan, and Masuda; Setsuko, Toshima-ku, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. VIVA 0.1, which is a height that is obtained by measuring a surface of the magnetic layer with an atomic force microscope and at which a cross-sectional area is 0.1% with a measurement region area as 100%, is 5 nm or more and 10 nm or less, and standard deviation σ of the VIVA 0.1 in a width direction of the surface of the magnetic layer is 1.0 nm or less.”

The patent application was filed on 2024-06-28 (18/758961).

Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12406692) developed by Kasada; Norihito, Onozuka; Nobuhito, Sawada; Junya, and Yumiyama; Ryosuke, Minamiashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. A core void volume Vvc specified in international organization for standardization (ISO) 25178 on a surface of the magnetic layer is 1.200 nm.sup.3 or more and 3.000 nm.sup.3 or less, and standard deviation σ of the Vvc in a width direction of the surface of the magnetic layer is 0.120 nm.sup.3 or less.”

The patent application was filed on 2024-06-28 (18/758432).

Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12400681) developed by Onozuka; Nobuhito, Kasada; Norihito, Yumiyama; Ryosuke, and Sawada; Junya, Minamiashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. CS VIVA 0.1, which is a height that is obtained by measuring a surface of the magnetic layer with an atomic force microscope and at which a cutout length is 0.1% with a length of one side of a measurement region as 100%, is 4 nm or more and 10 nm or less, and standard deviation a of the CS VIVA 0.1 in a width direction of the surface of the magnetic layer is 1.0 nm or less.”

The patent application was filed on 2024-06-28 (18/759188).

Magnetic tape, magnetic tape cartridge, and magnetic tape device
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12394437) developed by Tsujimoto; Shinji, Hoshino; Shunichi, and Sawayashiki; Yoshihiro, Minamiashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided are a magnetic tape including a non-magnetic support and a magnetic layer including a ferromagnetic powder, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape. An amount of a fluid lubricant collected by wiping a surface of the magnetic layer by a nonwoven fabric is in a range of 5 to 400 ng/m.sup.2 as a value per unit area of the surface of the magnetic layer.”

The patent application was filed on 2023-01-30 (18/161509).

Magnetic tape with characterized alfesil abrasion value, magnetic tape cartridge, and magnetic tape apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12380924) developed by Kurokawa; Takuto, Shibata; Yujin, Kasada; Norihito, and Matsuyama; So, Minamiashigara, Japan, for “magnetic tape with characterized alfesil abrasion value, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which an AlFeSil abrasion value measured on a surface of the magnetic layer is 20 μm or more and 50 μm or less, and standard deviation a of the AlFeSil abrasion value obtained in a width direction of the surface of the magnetic layer is 5.0 μm or less.”

The patent application was filed on 2023-09-14 (18/467426).

Magnetic tape device and method of operating magnetic tape device
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12374363) developed by Ishikawa; Ren, Kanagawa, Japan, for “magnetic tape device and method of operating magnetic tape device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided is a magnetic tape device including: a magnetic head having a magnetic element that acts in proximity to a magnetic layer formed on a front surface of a magnetic tape; and a support member which is disposed at a position facing the magnetic head and against which a back surface of the magnetic tape provided on a side opposite to the front surface is pressed, in which the support member has a groove formed along a running direction of the magnetic tape only in a region corresponding to a non-acting region except for a region of the magnetic layer on which the magnetic element acts.”

The patent application was filed on 2023-01-18 (18/156056).

Magnetic tape apparatus, magnetic tape, and magnetic tape cartridge
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12374368) developed by Kasada; Norihito, Minamiashigara, Japan, for “magnetic tape apparatus, magnetic tape, and magnetic tape cartridge.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided is a magnetic tape apparatus in which the magnetic tape is run between a winding reel and a cartridge reel in a state where a tension is applied in a longitudinal direction, a maximum value of the tension is 0.50 N or more, the magnetic tape after being run in a state where the tension is applied is wound around the cartridge reel with a tension of 0.30 N or less applied in the longitudinal direction, and the number of recesses existing on a surface of the magnetic layer of the magnetic tape and having an equivalent circle diameter of 0.10 μm or more and less than 0.20 μm is 100 or more and 2000 or less per an area of 40 μm×40 μm.”

The patent application was filed on 2023-06-07 (18/330717).

Magnetic tape, magnetic tape cartridge, servo pattern recording device, magnetic tape drive, magnetic tape system, detection device, inspection device, servo pattern recording method, manufacturing method of magnetic tape, detection method, and inspection method
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12374361) developed by Nakao; Toru, Kaneko; Tetsuya, and Akano; Yoichi, Kanagawa, Japan, for “magnetic tape, magnetic tape cartridge, servo pattern recording device, magnetic tape drive, magnetic tape system, detection device, inspection device, servo pattern recording method, manufacturing method of magnetic tape, detection method, and inspection method.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A plurality of servo patterns are recorded in a magnetic tape along a longitudinal direction. The servo pattern is at least one linear magnetization region pair. The linear magnetization region pair includes a first linear magnetization region, which is linearly magnetized, and a second linear magnetization region, which is linearly magnetized. The first linear magnetization region and the second linear magnetization region are inclined in opposite directions with respect to a first imaginary straight line along a width direction of the magnetic tape. The first linear magnetization region has a steeper inclined angle with respect to the first imaginary straight line than the second linear magnetization region.”

The patent application was filed on 2024-03-07 (18/599062).

Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12374360) developed by Kasada; Norihito, Shibata; Yujin, Kurokawa; Takuto, and Matsuyama; So, Minamiashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which a contact angle with 1-bromonaphthalene, which is measured on a surface of the magnetic layer, is 45.0° or more and 55.0° or less, and standard deviation σ of the contact angle in a width direction of the surface of the magnetic layer is 1.0° or less.”

The patent application was filed on 2023-09-14 (18/467336).

Magnetic tape with characterized surface recesses, magnetic tape cartridge, and magnetic tape apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12374359) developed by Kasada; Norihito, Minamiashigara, Japan, for “magnetic tape with characterized surface recesses, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes: a non-magnetic support; and a magnetic layer containing a ferromagnetic powder, in which the number of recesses existing on a surface of the magnetic layer and having an equivalent circle diameter of 0.25 μm or more and 0.55 μm or less is 10 or more and 500 or less per an area of 40 μm×40 μm, and standard deviation a of the number of the recesses in a width direction of the surface of the magnetic layer is 50 or less.”

The patent application was filed on 2023-09-13 (18/466600).

Magnetic tape apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12367903) developed by Kasada; Norihito, Minamiashigara, Japan, for a “magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “Provided is a magnetic tape apparatus. In a case where a maximum value of an absolute value of a difference between a servo band interval obtained before the following storage and a servo band interval obtained after the storage of N cycles, in which a predetermined storage is set as one cycle, is denoted by A, and a medium life is equal to or longer than 5 years, which is calculated by a linear function of A and a logarithm log.sub.e T of T derived from a value of A and a value of the logarithm log.sub.e T of a total storage time T of the storage of the N cycles, each of which is obtained by setting N as 1, 2, 3, 4, or 5. The medium life is T, in a case where A satisfies Expression a: A=1.5−B+C.”

The patent application was filed on 2024-05-31 (18/680013).

Magnetic tape, magnetic tape cartridge, and magnetic tape apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (12367905) developed by Yumiyama; Ryosuke, Kasada; Norihito, Onozuka; Nobuhito, and Sawada; Junya, Minamiashigara, Japan, for “magnetic tape, magnetic tape cartridge, and magnetic tape apparatus.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape includes a non-magnetic support, and a magnetic layer containing a ferromagnetic powder. A magnetic tape cartridge and a magnetic tape apparatus include the magnetic tape. A protruding peak height Spk specified in ISO 25178 on a surface of the magnetic layer is 1.5 nm or more and 3.0 nm or less, and standard deviation σ of the Spk in a width direction of the surface of the magnetic layer is 0.5 nm or less.”

The patent application was filed on 2024-06-28 (18/759114).