Process for detecting transported and residual tape amounts

Details Process for detecting transported and residual tape amounts Process for detecting transported and residual tape amounts

1982-02-23

1984-10-23

Wolff, John H.

Dynamic magnetic information storage or retrieval

Miscellaneous

360 73, 242191, G11B 1928

Patent

active

044791593

ABSTRACT:
A process for calculating the amount of recording tape or time left remaining on a tape reel includes sensing the rotational period of both the supply and take-up reels, and performing operations on this data to derive the value for the remaining/transported tape amount, the operations performed depending upon the direction of tape travel. In addition, the process may include disregarding data obtained during times of highly variable tape speed, such as when changing tape transport direction, etc. The invention may be used in connection with a reversible-type tape recorder capable of reproduction or recording in both tape transport directions.

REFERENCES:
patent: 4125881 (1978-11-01), Eige et al.
patent: 4172231 (1979-10-01), d'Arc et al.
patent: 4232371 (1980-11-01), Kamoto
patent: 4280159 (1981-07-01), Nakayama
patent: 4347538 (1982-08-01), Klank

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