Apparatus and method for forming a head drum assembly

Details Apparatus and method for forming a head drum assembly Apparatus and method for forming a head drum assembly

1974-11-14

1976-05-04

Eddleman, Alfred H.

Dynamic magnetic information storage or retrieval

Head

Head accessory

360 84, G11B 1560, G11B 552, G11B 1526

Patent

active

039552152

ABSTRACT:
Method and apparatus for producing a head drum for a video tape recorder and playback in which the head drum about which the tape passes is formed with a guide ledge so as to direct the tape past rotating magnetic heads and wherein the ledge is formed by cutting the surface of the head drums with a cutting tool and then providing a groove which undercuts the surface of the drum so as to form the ledge with a surface which is at right angles to the tangent of the tape engaging surface of the drum. By undercutting the surface of the drum to form the ledge assures that a radius will not be formed between the drum surface and the ledge, thus assuring accurate indexing of the lower edge of the video tape.

REFERENCES:
patent: 3354269 (1967-11-01), Rank
patent: 3567869 (1971-03-01), Chigasaki et al.
patent: 3840895 (1974-10-01), Kubo
patent: 3863269 (1975-01-01), Akamine

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