Tape cartridge case composition for reducing modulation noise

Details Tape cartridge case composition for reducing modulation noise Tape cartridge case composition for reducing modulation noise

1986-09-04

1988-12-13

Tupper, Robert S.

Dynamic magnetic information storage or retrieval

Record medium

In container

206387, G11B 2302

Patent

active

047914840

ABSTRACT:
A tape cartridge which comprises a cartridge case made of a complex plastic material made of polyolefin resin, mixed with a filler of 45 percent to 65 percent by weight of the plastic material wherein the filler includes particles made of at least one of calcium carbonate and barium sulfate. The tape cartridge has a dynamic loss of more than 1.times.10.sup.9 dyne/cm.sup.2 within a range of oscillation frequency of 0.1 Hz to 1000 Hz. Accordingly, the tape cartridge of the present invention can prevent a running tape arranged in the tape cartridge from oscillating since outside oscillation is attenuated in the tape cartridge. Also the tape cartridge can reduce modulation noise which occurs because of the outside oscillation.

REFERENCES:
patent: 4545500 (1985-10-01), Yamaguchi et al.
patent: 4639386 (1987-01-01), Akao

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