FujiFilm Assigned Six Patents

Magnetic tape having characterized coefficient of variation of e-iron oxide powder particle size, magnetic tape cartridge, and magnetic recording and reproducing apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11670333) developed by Fujimoto, Takashi, Kasada, Norihito, and Ozawa, Eiki, Minami-ashigara, Japan, for “magnetic tape having characterized coefficient of variation of e-iron oxide powder particle size, magnetic tape cartridge, and magnetic recording and reproducing 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 including ferromagnetic powder, in which the ferromagnetic powder is ε-iron oxide powder, and a coefficient of variation of particle size of the ε-iron oxide powder in a longitudinal direction of the magnetic layer is 0.50% or more and 5.00% or less.”

The patent application was filed on 2021-03-12 (17/199669).

Magnetic tape cartridge having characterized winding deviation occurance load and magnetic tape device
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11670335) developed by Kasada, Norihito, Minamiashigara, Japan, for “magnetic tape cartridge having characterized winding deviation occurance load and magnetic tape device.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “The magnetic tape cartridge includes a magnetic tape, and a cartridge reel, in which, in the magnetic tape, a minimum winding deviation occurrence load measured after the magnetic tape is rewound around the cartridge reel by applying a tension of 0.30 N in a longitudinal direction of the magnetic tape is 250 N or less.”

The patent application was filed on 2021-12-22 (17/645697).

Magnetic tape device, tape, and cartridge
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11651792) developed by Kasada, Norihito, Minamiashigara, Japan, for “magnetic tape device, magnetic tape, and magnetic tape cartridge.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A magnetic tape device, a magnetic tape, and a magnetic tape cartridge, in which the magnetic tape is caused to run between a winding reel and a cartridge reel in a state where a tension is applied in a longitudinal direction and a maximum value of the tension is 0.50 N or more, and the magnetic tape after running in a state where the tension is applied is wound around the cartridge reel by applying a tension of 0.40 N or less in the longitudinal direction of the magnetic tape, and the number of recesses having an equivalent circle diameter of 0.20 μm to 0.50 μm existing on a surface of the magnetic layer of the magnetic tape is 10 to 500 per 40 μm×40 μm area.”

The patent application was filed on 2021-12-22 (17/645699).

Magnetic tape cartridge and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11631428) developed by Kaneko, Yusuke, and Kasada, Norihito, Kanagawa, Japan, for “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 cartridge includes a magnetic tape that is accommodated in the magnetic tape cartridge while being wound around a reel hub. A water absorption amount of the magnetic tape measured after the magnetic tape cartridge is stored in a storage environment of a temperature of 32° C. and a relative humidity of 80% for 10 days is 0.30 g or less as a value in terms of a length of the magnetic tape of 1000 m, and the water absorption amount is a value measured in a measurement environment with a temperature of 21° C. and a relative humidity of 50% within 1 hour after the storage.”

The patent application was filed on 2021-07-19 (17/378782).

Magnetic tape cartridge and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11631429) developed by Kaneko, Yusuke, and Kasada, Norihito, Kanagawa, Japan, for “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 cartridge includes a magnetic tape that is accommodated in the magnetic tape cartridge while being wound around a reel hub. A water absorption amount of the magnetic tape measured after the magnetic tape cartridge is stored in a storage environment of a temperature of 32° C. and a relative humidity of 80% for 10 days is more than 0.30 g as a value in terms of a length of the magnetic tape of 1000 m, and the water absorption amount is a value measured in a measurement environment with a temperature of 21° C. and a relative humidity of 50% within 1 hour after the storage.”

The patent application was filed on 2021-07-19 (17/378783).

Magnetic tape cartridge and method of manufacturing cartridge
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (11626135) developed by Sumiya, Yosuke, Kanagawa, Japan, for “magnetic tape cartridge and method of manufacturing magnetic tape cartridge.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: “A magnetic tape cartridge includes a case that houses a magnetic tape and has an opening, a door that is provided in the case and closes the opening, and a fixing portion that fixes the door to the case.”

The patent application was filed on 2022-02-28 (17/683264).