Dynamic magnetic information storage or retrieval – Head – Head accessory
Patent
1982-09-29
1985-08-06
Wolff, John H.
Dynamic magnetic information storage or retrieval
Head
Head accessory
242 76, 242157R, 226196, G11B 1560
Patent
active
045339686
ABSTRACT:
A ceramic guide for tape-like materials such as magnetic recording tapes, movie films, and microfilms, and a process for producing such ceramic guides are described. The ceramic guide is a sintered product of (A) 98 to 93 parts by weight of barium titanate, (B) 2 to 7 parts by weight of a silicate inorganic binder, and (C) 0.2 to 2 parts by weight, per 100 parts by weight of (A) and (B), of lanthanum oxide. The ceramic guide meets the requirements for guides for use in, e.g., small sized video cassettes, is non-magnetic, electrically conductive and has anti-static properties and, therefore, it does not generate static charge and has a low coefficient of friction during running of tape-like materials in contact therewith.
REFERENCES:
patent: 3787229 (1974-01-01), Rudness
patent: 4062484 (1977-12-01), Rausch et al.
patent: 4378899 (1983-04-01), Sanford
Oishi Kengo
Yagi Motohiko
Yoshida Tuneo
Fuji Photo Film Co. , Ltd.
Wolff John H.
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