Ferromagnetic insert for use with a magnetic tape cartridge and

Details Ferromagnetic insert for use with a magnetic tape cartridge and Ferromagnetic insert for use with a magnetic tape cartridge and

1992-03-25

1994-04-05

Stodola, Daniel P.

Winding, tensioning, or guiding

Strand tensioning device

Tortuous course

242198, B65H 7518

Patent

active

052997545

ABSTRACT:
An insert that is to be mounted on a hub of a spool positioned in a magnetic tape cartridge for permitting the spool to be attracted to the magnetic element of a computer drive mechanism includes a circular ferromagnetic disk having oppositely positioned first and second planar surfaces. The disk is provided with a centrally positioned through hole, and a plurality of securing through holes for permitting the ferromagnetic disk to be secured to the spool hub of a magnetic tape cartridge. The disk includes an annular flange that extends around the outer periphery of the disk and axially away from the first planar surface. The ferromagnetic disk has a thickness as measured between the first and second planar surfaces that is less than 1.35 mm. The disk can also include an annular flange that surrounds the centrally positioned hole and that extends axially away from the first planar surface. Also, the disk can be provided with an annular flange that surrounds each of the securing through holes and that extends axially away from the first planar surface. Each of the annular flanges that surrounds the securing holes can have a radially inwardly directed shoulder that allows the ferromagnetic disk to be securely attached to the hub of the spool of the magnetic tape cartridge.

REFERENCES:
patent: 2943661 (1960-07-01), Stern
patent: 3298625 (1967-01-01), Babcock
patent: 3856066 (1974-12-01), Reynolds
patent: 4254922 (1981-03-01), Wolf et al.
patent: 4343441 (1982-08-01), Graham
patent: 4376606 (1983-03-01), Peterson
patent: 4723731 (1988-02-01), Posso
patent: 4970748 (1990-11-01), Rubey
patent: 5029771 (1991-07-01), Ranoia

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