Rotary drum for video tape recorder

Details Rotary drum for video tape recorder Rotary drum for video tape recorder

1991-02-27

1993-06-15

Heinz, A. J.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

36013024, G11B 552, G11B 2104

Patent

active

052204723

ABSTRACT:
A surface of an upper rotary drum of a video tape recorder is machines such that it has a surface roughness in a range from 1 .mu.m to 2 .mu.m so as to enable a releasing of air on the upper rotary drum surface uniformly whereby a thickness of an air film between a magnetic tape and a head is uniformly reduced without affecting the tape running. The surface may be grooved concurrently with the roughened surface. A window is formed in rotary drum for receiving at least one magnetic head.

REFERENCES:
patent: 4163266 (1979-07-01), Tamamura

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