Magnetic tape container

Patent metadata

Field	Value
Publication number	US-11735219-B2
Application number	US-202217680904-A
Country	US
Kind code	B2
Filing date	Feb 25, 2022
Priority date	Feb 26, 2021
Publication date	Aug 22, 2023
Grant date	Aug 22, 2023

Abstract

The magnetic tape container includes a core around which a magnetic tape is wound. The magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder. A maximum value of a deviation of a center position of an average minimum region reference circle of a trajectory of one rotation drawn by the magnetic tape, in a case where the wound magnetic tape is drawn out from the core core is 100 μm or less for three points of the magnetic tape in a width direction.

First claim

What is claimed is:

1. A magnetic tape container comprising:
a core around which a magnetic tape is wound,
wherein the magnetic tape includes a non-magnetic support, and a magnetic layer including a ferromagnetic powder, and
a maximum value of a deviation of a center position of an average minimum region reference circle of a trajectory of one rotation drawn by the magnetic tape, in a case where the wound magnetic tape is drawn out from the core core is 100 μm or less for three points of the magnetic tape in a width direction.

2. The magnetic tape container according to claim 1 ,
wherein the magnetic tape has a servo pattern in the magnetic layer.

3. The magnetic tape container according to claim 1 ,
wherein an entire length of the magnetic tape is 200 m or more.

4. The magnetic tape container according to claim 1 ,
wherein the maximum value of the deviation of the center position of the average minimum region reference circle is 80 μm or less for the three points.

5. The magnetic tape container according to claim 1 ,
wherein the maximum value of the deviation of the center position of the average minimum region reference circle is 55 μm or less for the three points.

6. The magnetic tape container according to claim 1 ,
wherein the magnetic tape further includes a non-magnetic layer including a non-magnetic powder between the non-magnetic support and the magnetic layer.

7. The magnetic tape container according to claim 1 ,
wherein the magnetic tape further includes a back coating layer including a non-magnetic powder on a surface side of the non-magnetic support opposite to a surface side on which the magnetic layer is provided.

8. The magnetic tape container according to claim 1 ,
wherein the magnetic tape container is a magnetic tape cartridge.

9. The magnetic tape container according to claim 8 ,
wherein the magnetic tape has a servo pattern in the magnetic layer.

10. The magnetic tape container according to claim 8 ,
wherein an entire length of the magnetic tape is 200 m or more.

11. The magnetic tape container according to claim 8 ,
wherein the maximum value of the deviation of the center position of the average minimum region reference circle is 80 μm or less for the three points.

12. The magnetic tape container according to claim 8 ,
wherein the maximum value of the deviation of the center position of the average minimum region reference circle is 55 μm or less for the three points.

13. The magnetic tape container according to claim 1 ,
wherein the magnetic tape container is a magnetic recording and reproducing device, and further includes a magnetic head.

14. The magnetic tape container according to claim 13 ,
wherein the magnetic tape has a servo pattern in the magnetic layer.

15. The magnetic tape container according to claim 13 ,
wherein an entire length of the magnetic tape is 200 m or more.

16. The magnetic tape container according to claim 13 ,
wherein the maximum value of the deviation of the center position of the average minimum region reference circle is 80 μm or less for the three points.

17. The magnetic tape container according to claim 13 ,
wherein the maximum value of the deviation of the center position of the average minimum region reference circle is 55 μm or less for the three points.

18. The magnetic tape container according to claim 13 ,
wherein the magnetic head includes a reproducing element having a reproducing element width of 0.8 μm or less.

19. The magnetic tape container according to claim 13 , further comprising:
a tension adjusting mechanism which adjusts a tension applied in a longitudinal direction of the magnetic tape which runs in the magnetic recording and reproducing device.

20. The magnetic tape container according to claim 1 ,
wherein the magnetic tape has a vertical squareness ratio of 0.60 or more.

Assignees

• Fujifilm Corp

Inventors

• Kamimura Shota
• Murata Yuto
• Ueyama Tomohide
• Kasada Norihito

Classifications

• G11B5/78 Primary

  Tape carriers · CPC title

• G11B15/43

  Control or regulation of mechanical tension of record carrier, e.g. tape tension · CPC title

• B65H2701/378

  Recording tape · CPC title

• B65H75/4471

  Housing enclosing the reel · CPC title

• B65H75/14

  with two end flanges · CPC title