Magnetic tape and method for manufacturing the same

Details Magnetic tape and method for manufacturing the same Magnetic tape and method for manufacturing the same

2007-07-17

2007-07-17

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Magnetic recording media substrate

Reexamination Certificate

active

10802134

ABSTRACT:
A method for manufacturing a magnetic tape includes a step of setting a cutting start angle between the disk-like upper blade and the disk-like lower blade overlapping each other and rotating in opposite directions at the time that cutting of the broad magnetic tape fed to a portion between the upper blade and the lower blade by the upper blade and the lower blade is started so that a position where an irregular raised and depressed pattern of a cut surface of the support on the side of the upper blade to be formed becomes locally maximal or a position where an irregular raised and depressed pattern of a cut surface of the support on the side of the lower blade becomes locally maximal satisfies 40≦100BU/T≦70 or 40≦100BL/T≦70, where BU is the distance from the surface of the back coat layer to the position where the irregular raised and depressed pattern of the cut surface of the support on the side of the upper blade becomes locally maximal, BL is the distance from the surface of the back coat layer to the position where the irregular raised and depressed pattern of the cut surface of the support on the side of the lower blade becomes locally maximal and T is the total thickness of the broad magnetic tape, and cutting the broad magnetic tape, thereby manufacturing the magnetic tape.

REFERENCES:
patent: 5873293 (1999-02-01), Yamazaki
patent: 2003/0188612 (2003-10-01), Kobayashi et al.
patent: 2004/0173069 (2004-09-01), Shoudai et al.
patent: 62-202385 (1987-09-01), None
patent: 09-153212 (1997-06-01), None
patent: 11-296839 (1999-10-01), None
Machine translation of JP 11-296839, Oct. 1999.

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