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Magnetic tape cassette, tape reel and magnetic tape

一种磁带卷盘、磁带的技术，应用在带形载体、数据记录、包装等方向，能够解决卷乱、不能抑制卷乱等问题

Inactive Publication Date: 2004-12-29
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] 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, tape reel and magnetic tape
  • Magnetic tape cassette, tape reel and magnetic tape
  • Magnetic tape cassette, tape reel and magnetic tape

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0041] Hereinafter, the significant effects of the present invention will be described according to the embodiments of the present invention.

[0042] Use tapes with tape thickness and tape width shown in Table 1 to form figure 1 The reel cores of the flange width shown in Table 1 (Examples 1 to 3, Comparative Examples 1 to 4) in the state shown were used to form tape cassettes. Measure the output fluctuation of the tape cassette and the increase of the loss (D0). The measurement results are shown in Table 1.

[0043] In addition, the output fluctuation is 0% when the amplitude of the envelope of the RF output is normal, and 100% when there is no signal. For the increase in loss, the tape is run normally after 300 FF / REW runs by the VCR, and the number of loss over 0.2 μs is counted before and after the measurement.

[0044] Tape thickness

(μm)

Tape width

W1(mm)

Flange width

W2(mm)

(U2+D2)-

(U1+D1)

(μm)

Output

Change

(%)

D0 incre...

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PUM

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Abstract

A tape reel (10) is so constructed that an upper flange (12) and a lower flange (13) are respectively provided at an upper and a lower ends of a cylindrical reel hub (11) around which a magnetic tape (20) is wound, and a maximum value of a distance from the upper flange (12) and the lower flange (13) to lateral ends of the magnetic tape (20) is set to be 0.5 mm or more, and less than 1.0 mm. The magnetic tape (20) includes a nonmagnetic substrate (21), a magnetic layer (22) provided on one face of the nonmagnetic substrate and a back layer (23) provided on the other face of the nonmagnetic substrate, and in a state where the magnetic tape is wound around the tape reel (10), a distance (U1+D1) from the upper flange (12) and the lower flange (13) to lateral ends of the back layer (23) is larger than a distance (U2+D2) from the upper flange (12) and the lower flange (13) to lateral ends of the nonmagnetic substrate (21) or lateral ends of the magnetic layer (22).

Description

[0001] This application is a divisional application, the application number of the parent application: 00803723.X, the filing date: 2000.2.15, the title of the invention: tape cassette, tape reel and magnetic tape Technical field [0002] 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 having upper and lower flanges at the upper and lower ends of the reel core, and a magnetic tape wound on the reel. Background technique [0003] So far, tape cassettes include various formats such as video recording, audio recording, and computer use. For example, in a video tape cassette, a pair of tape reels having a reel core and upper and lower flanges are configured to be rotatably housed in a state where the tape is wound on the outer periphery of the reel core. In a box shell composed of upper and lower half boxes. [0004] Figure 5 To show the basic structure of the reel core. As shown i...

Claims

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Application Information

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Patent Type & Authority Applications(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