Magnetic tape cassette reel

Details Magnetic tape cassette reel Magnetic tape cassette reel

1997-09-12

1998-11-03

Walsh, Donald P.

Winding, tensioning, or guiding

Coil holder or support

Spool or core

242614, G11B 23087

Patent

active

058297120

ABSTRACT:
A recessed portion (24) is formed on the upper surface of the lower flange (23). An annular positioning rib (25) is provided on the lower surface of the lower flange (23) so as to be coaxial with the revolving center of the reel main body (20) and so as to be integrated with the lower flange (23). A ventilating hole (26) is provided so as to penetrate the lower flange (23), running through the base end part of the annular positioning rib (25) and the recessed portion (24). The air between the layers of the wound tape can be exhausted via the ventilating hole (26) to the side of the base end part of the annular positioning rib (25) through the recess (24) along the direction of an arrow (B).

REFERENCES:
patent: 4932604 (1990-06-01), Maehara et al.
patent: 5054709 (1991-10-01), Sato
patent: 5456423 (1995-10-01), Sakurai et al.
patent: 5474253 (1995-12-01), Kasetty et al.

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