Grooved drum for tape recording and/or reproducing apparatus

Details Grooved drum for tape recording and/or reproducing apparatus Grooved drum for tape recording and/or reproducing apparatus

1979-04-12

1981-03-17

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Head

Head accessory

226 97, 226193, 360 84, 360107, G11B 552, G11B 1560, G11B 2104

Patent

active

042570760

ABSTRACT:
A recording and/or reproducing apparatus, such as a video tape recorder, comprises a drum having a peripheral surface on which a magnetic tape can be wrapped, and at least one head for recording signals on, reproducing signals from, the magnetic tape by helically scanning it. Grooves are formed in the peripheral surface of the drum to inhibit formation of a thin layer of water between the surface of the drum and the magnetic tape. The lengths of the grooves are substantially parallel to the direction of transport of the magnetic tape and each groove includes a wall portion disposed at an angle greater than 3 degrees to a line joining the crests of the grooves and normal to the direction of transport of the magnetic tape.

REFERENCES:
patent: 3056164 (1962-10-01), Reichel et al.
patent: 3286895 (1966-11-01), Poumakis
patent: 3398870 (1968-08-01), Mullan et al.
patent: 3405855 (1968-10-01), Daly et al.
patent: 3534893 (1970-10-01), Maxon
patent: 3643791 (1972-02-01), Thornsbery

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