Magnetic tape cartridge and magnetic tape device

Patent metadata

Field	Value
Publication number	US-2022013146-A1
Application number	US-202117366039-A
Country	US
Kind code	A1
Filing date	Jul 2, 2021
Priority date	Jul 7, 2020
Publication date	Jan 13, 2022
Grant date	—

Abstract

The magnetic tape cartridge includes a magnetic tape, and a cartridge reel. 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 0.40 N in a longitudinal direction of the magnetic tape is 300 N or less.

First claim

What is claimed is:

1 . A magnetic tape cartridge comprising:
a magnetic tape; and a cartridge reel, wherein, 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 0.40 N in a longitudinal direction of the magnetic tape is 300 N or less.

2 . The magnetic tape cartridge according to claim 1 ,
wherein the magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder, and the non-magnetic support is a polyester support.

3 . The magnetic tape cartridge according to claim 2 ,
wherein the magnetic tape further includes a non-magnetic layer including a non-magnetic powder between the non-magnetic support and the magnetic layer.

4 . The magnetic tape cartridge according to claim 2 ,
wherein the magnetic tape further includes a back coating layer containing a non-magnetic powder on a surface side of the non-magnetic support opposite to a surface side provided with the magnetic layer.

5 . The magnetic tape cartridge according to claim 1 ,
wherein the magnetic tape has a tape thickness of 5.6 μm or less.

6 . The magnetic tape cartridge according to claim 1 ,
wherein the magnetic tape has a tape thickness of 5.3 μm or less.

7 . The magnetic tape cartridge according to claim 1 ,
wherein the minimum winding deviation occurrence load is 10 N to 300 N.

8 . The magnetic tape cartridge according to claim 1 ,
wherein the magnetic tape cartridge is used in a magnetic tape device in which the magnetic tape is caused to run between a winding reel and the cartridge reel of the magnetic tape cartridge in a state where a tension is applied in the longitudinal direction of the magnetic tape, a maximum value of the tension being 0.50 N or more, and the magnetic tape after running in a state where the tension is applied is caused to be wound around the cartridge reel by applying a tension of 0.40 N or less in the longitudinal direction of the magnetic tape.

9 . A magnetic tape device comprising:
the magnetic tape cartridge according to claim 1 .

10 . The magnetic tape device according to claim 9 , comprising:
the magnetic tape cartridge; and a winding reel, wherein the magnetic tape is caused to run between the winding reel and the cartridge reel of the magnetic tape cartridge in a state where a tension is applied in the longitudinal direction of the magnetic tape, a maximum value of the tension being 0.50 N or more, and the magnetic tape after running in a state where the tension is applied is caused to be wound around the cartridge reel of the magnetic tape cartridge by applying a tension of 0.40 N or less in the longitudinal direction of the magnetic tape.

11 . The magnetic tape device according to claim 10 ,
wherein the tension applied in the longitudinal direction of the magnetic tape during the running is changed.

Assignees

• Fujifilm Corp

Inventors

• Kasada Norihito
• Kagawa Yusuke

Classifications

• G11B5/78

  Tape carriers · CPC title

• G11B5/73927

  Polyester substrates, e.g. polyethylene terephthalate · CPC title

• G11B5/733

  characterised by the addition of non-magnetic particles {(base layers having a non-magnetic layer under a soft magnetic layer G11B5/736; magnetic recording media substrates G11B5/739)} · CPC title

• G11B5/73

  Base layers {, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer} · CPC title

• G11B23/107 Primary

  using one reel or core, one end of the record carrier coming out of the magazine or cassette · CPC title