FujiFilm Assigned Twelve Patents

Magnetic tape
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,937,456) developed by Kasada, Norihito, Kurokawa, Takuto, and Oyanagi, Masahito, Minami-ashigara, Japan, for a “magnetic tape.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”The magnetic tape has a magnetic layer containing ferromagnetic powder and binder on one surface of a nonmagnetic support and has a backcoat layer containing nonmagnetic powder and binder on the other surface thereof, wherein the thickness of the backcoat layer is less than or equal to 0.20 .mu.m, the contact angle for 1-bromonaphthalene that is measured on the surface of the backcoat layer falls within a range of 10.0.degree. to 30.0.degree., and the contact angle for 1-bromonaphthalene that is measured on the surface of the magnetic layer falls within a range of 45.0.degree. to 55.0.degree.”

The patent application was filed on February 27, 2017 (15/442,961).

Magnetic tape having characterized magnetic layer and manufacturing
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,910,009) developed by Oyanagi, Masahito, Kasada, Norihito, Tada, Toshio, and Sugiyama, Takuro, Minami-ashigara, Japan, for “magnetic tape having a characterized magnetic layer 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 magnetic layer containing ferromagnetic powder and binder on a nonmagnetic support, wherein the centerline average surface roughness Ra as measured on the surface on the magnetic layer side of the magnetic tape is less than or equal to 1.8 nm, and the logarithmic decrement as determined by a pendulum viscoelasticity test on the surface on the magnetic layer side of the magnetic tape is less than or equal to 0.050.”

The patent application was filed on June 19, 2018 (16/012,018).

Recording and reproducing device
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,902,877) developed by Kagawa, Yusuke, and Kaneko, Tetsuya, Kanagawa, Japan, for “recording and reproducing device and recording and reproducing method.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A recording and reproducing device includes: a first acquisition unit which acquires servo band interval information representing an interval, in a width direction of a magnetic tape, between adjacent servo recording elements of plural servo recording elements which record the servo patterns on the plural servo bands, respectively, a second acquisition unit which acquires reproducing element interval information representing an interval in the width direction between respective servo reproducing elements which read the adjacent servo patterns along the width direction with respect to the plural tape drives, and a selection unit which selects a tape drive into which the magnetic tape is inserted, from the plural tape drives, using a value representing a difference between the interval represented by the servo band interval information and the interval represented by the reproducing element interval information.”

The patent application was filed on March 9, 2020 (16/812,374).

Single reel magnetic tape cartridge with pre-defined tape width difference
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,902,875) developed by Kagawa, Yusuke, Kasada, Norihito, and Murata, Yuto, Minami-ashigara, Japan, for a “single reel magnetic tape cartridge with pre-defined tape width difference.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”Provided is a magnetic tape cartridge of a single reel type in which a magnetic tape is wound around a reel, in which the magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder and a binding agent on the non-magnetic support, a tape thickness is equal to or smaller than 5.2 .mu.m, a tape width difference (B-A) between a tape width A at a position of 10 m.+-.1 m from a tape outer end and a tape width B at a position of 50 m.+-.1 m from a tape inner end is 2.4 .mu.m to 12.0 .mu.m, and the tape width A and the tape width B are values measured 100 days from the date of magnetic tape cartridge manufacture.”

The patent application was filed on April 15, 2020 (16/849,154).

Magnetic tape having characterized magnetic layer, tape cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,902,874) developed by Kasada, Norihito, Minami-ashigara, Japan, for “magnetic tape having characterized magnetic layer, 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 including ferromagnetic powder and a binding agent on the non-magnetic support, in which an absolute value .DELTA.N of a difference between a refractive index Nxy measured regarding an in-plane direction of the magnetic layer and a refractive index Nz measured regarding a thickness direction of the magnetic layer is 0.25 to 0.40, and a coefficient of friction measured regarding a base portion of a surface of the magnetic layer is equal to or smaller than 0.30, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape.”

The patent application was filed on July 26, 2019 (16/522,867).

Recording tape cartridge storage case and storage case
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,896,697) developed by Sumiya, Yosuke, and Kagawa, Yusuke, Kanagawa, Japan, for “recording tape cartridge storage case and storage case containing recording tape cartridges.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A recording tape cartridge storage case includes a case body made of resin having a bottom plate that is rectangular in a bottom view and a peripheral wall erected from a peripheral edge of the bottom plate, a plurality of recording tape cartridges being stored in at least two rows with label areas thereof directed upward, respectively, and a bottom rib interposed between mutually adjacent side surfaces of the recording tape cartridges that form the rows being formed on the bottom plate, and a lid member made of resin that is attached to an upper end of the peripheral wall, seals the case body, and has a top rib interposed between the side surfaces, transmission parts that are transparent flat surfaces being formed in portions that face the label areas on both sides of the top rib.”

The patent application was filed on March 19, 2019 (16/357,327).

Magnetic tape
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,896,692) developed by Kurokawa, Takuto, Kasada, Norihito, and Oyanagi, Masahito, Minami-ashigara, Japan, for a “magnetic tape.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”The magnetic tape has a magnetic layer containing ferromagnetic powder and binder on one surface of a nonmagnetic support and has a backcoat layer containing nonmagnetic powder and binder on the other surface thereof, wherein the thickness of the backcoat layer is less than or equal to 0.20 .mu.m, and the contact angle for 1-bromonaphthalene that is measured on the surface of the backcoat layer falls within a range of 10.0.degree. to 30.0.degree.”

The patent application was filed on February 27, 2017 (15/443,094).

Device and method for recording information regarding servo signals
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,896,691) developed by Akano, Yoichi, Kanagawa, Japan, for “device and method for recording information regarding servo signals.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A recording device, a control device, a recording method, a recording tape cartridge, and a data recording and reproducing system capable of accurately positioning a data recording and reproducing head are obtained. A recording device includes a recording unit that records information on linearity of a servo signal recorded on a magnetic tape included in a recording tape cartridge on an RFID tag included in the recording tape cartridge.”

The patent application was filed on September 3, 2018 (16/120,328).

Magnetic tape having servo pattern and characterized magnetic layer
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,891,982) developed by Kasada, Norihito, Minami-ashigara, Japan, for “magnetic tape having servo pattern and characterized magnetic layer, and magnetic tape device.“

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 a ferromagnetic powder and a binding agent on the non-magnetic support, in which a magnetic tape total thickness is equal to or smaller than 5.30 .mu.m, the magnetic layer has a servo pattern, a center line average surface roughness Ra measured regarding a surface of the magnetic layer is equal to or smaller than 1.8 nm, and an isoelectric point of a surface zeta potential of the magnetic layer is equal to or greater than 5.5.”

The patent application was filed on April 14, 2020 (16/848,331).

Magnetic tape, cartridge, and apparatus
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,878,846) developed by Kasada, Norihito, Ozawa, Eiki, and Musha, Atsushi, Minami-ashigara, 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 include a non-magnetic support and a magnetic layer including ferromagnetic powder and a binding agent, in which the magnetic layer has a timing-based servo pattern, an edge shape of the timing-based servo pattern, specified by magnetic force microscopy is a shape in which a difference (L.sub.99.9-L.sub.0.1) between a value L.sub.99.9 of a cumulative distribution function of 99.9% and a value L.sub.0.1 of a cumulative distribution function of 0.1% in a position deviation width from an ideal shape of the magnetic tape in a longitudinal direction is 180 nm or less, and an isoelectric point of a surface zeta potential of the magnetic layer is 5.5 or more.”

The patent application was filed on January 30, 2020 (16/777,201).

Magnetic tape
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,878,845) developed by Kasada, Norihito, Minami-ashigara, Japan, for a “magnetic tape.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”The magnetic tape includes a non-magnetic support, a magnetic layer including ferromagnetic powder and a binding agent on one surface side of the non-magnetic support, and a back coating layer including non-magnetic powder and a binding agent on the other surface side of the non-magnetic support, in which a thickness of the back coating layer is equal to or smaller than 0.30 .mu.m, and an isoelectric point of a surface zeta potential of the back coating layer is equal to or smaller than 3.0.”

The patent application was filed on June 15, 2018 (16/009,825).

Recording tape cartridge storage case and storage case containing recording tape cartridge
FujiFilm Corporation, Tokyo, Japan, has been assigned a patent (10,867,232) developed by Kagawa, Yusuke, Kanagawa, Japan, for “recording tape cartridge storage case and storage case containing recording tape cartridge.“

The abstract of the patent published by the U.S. Patent and Trademark Office states: ”A recording tape cartridge storage case includes a case body made of resin having a bottom plate that is rectangular in a bottom view and a peripheral wall erected from a peripheral edge of the bottom plate, and storing a plurality of recording tape cartridges with label areas thereof directed upward, respectively, and a lid member made of resin that is attached to an upper end of the peripheral wall, seals the case body, and has transmission parts that are transparent flat surfaces being in contact with at least a peripheral part of the label area and being formed closer to the bottom plate than a support part that supports another case body stacked thereon is, on a portion facing the label area.”

The patent application was filed on April 8, 2019 (16/377,262).