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Magnetic tape cassette and tape reel

A tape reel and tape cassette technology, applied in the field of magnetic tape, can solve the problems of reel disorder, unable to suppress reel disorder, etc.

Inactive Publication Date: 2004-12-15
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, with the thinning of the magnetic tape, even if grooves are provided on the core of the reel, the disorder of the winding cannot be suppressed, especially when the thickness of the magnetic tape is below 7 μm, the disorder of the winding is prone to occur.

Method used

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  • Magnetic tape cassette and tape reel
  • Magnetic tape cassette and tape reel
  • Magnetic tape cassette and tape reel

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0040] The remarkable effect of the present invention will be described below according to the embodiments of the present invention.

[0041] Using tapes with the tape thicknesses and tape widths shown in Table 1, constitute figure 1 The reel centers (Examples 1 to 3 and Comparative Examples 1 to 4) in the states shown and the flange widths shown in Table 1 were used to produce magnetic tape cassettes. The output variation and the increase in dropout (DO) of the resulting tape cassette were measured. The measurement results are shown in Table 1.

[0042] In addition, the output fluctuation is 0% when the amplitude of the envelope of the RF output is normal, and is 100% when there is no signal. For the increase of dropout, the tape was run normally after FF / REW was performed 300 times by the video recorder, and the number of dropouts over 0.2μs was counted before and after the tape was measured respectively.

[0043] tape thickness

(μm)

tape width ...

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Abstract

A tape reel (10) comprises a cylindrical hub (11), on which magnetic tape (20) is wound, and an upper flange (12) and a lower flange (13) on the respective ends of the hub. The maximum distance from the upper flange (12) and the lower flange (13) to the edges of the magnetic tape (20) is equal to or greater than 0.5 mm and smaller than 1.0 mm. The magnetic tape (20) comprises a nonmagnetic base (21), including a magnetic layer (22) on one side and a backing layer (23) on the other side. With the magnetic tape wound on the tape reel (10), the distance (U1 + D1) from the upper flange (12) and the lower flange (13) to the edge of the backing layer (23) is greater than the distance (U2 + D2) from the upper flange (12) and the lower flange (13) to the edge of the nonmagnetic base (21) or to the edge of the magnetic layer (22).

Description

technical field [0001] The present invention relates to a magnetic tape reel and a magnetic tape suitable for a magnetic tape cassette, in particular to a magnetic tape reel with upper and lower flanges at the upper and lower ends of the reel core and a magnetic tape wound on the reel. Background technique [0002] Hitherto, there are various types of tape cassettes for video recording, recording, and computer use. For example, in the magnetic tape cassette for video recording, it is configured such that a pair of magnetic tape reels having a reel center and upper and lower flanges are rotatably housed in a state where the magnetic tape is wound on the outer periphery of the reel center. Inside a box shell made up of upper and lower halves. [0003] Figure 5 To represent the basic structure of the above-mentioned reel center. As shown in the figure, the reel core 110 includes a cylindrical reel core 111 around which a magnetic tape 120 is wound, a disc-shaped upper flange...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G11B5/78G11B23/037G11B23/087
CPCG11B5/78G11B23/037G11B23/08728G11B23/087
Inventor 村尾直人佐藤信山岸贡森田清夫
Owner FUJIFILM CORP