Dynamic magnetic information storage or retrieval – Head
Patent
1982-04-28
1983-11-01
Wolff, John H.
Dynamic magnetic information storage or retrieval
Head
360120, 360126, G11B 308, G11B 508
Patent
active
044132956
ABSTRACT:
The present invention provides a magnetic head of which magnetic core is composed of thin plates of a high magnetic permeability, each provided with an adhesive layer comprising a granular substance. In such structure, the stress relaxation achieved by said granular substance prevents the loss of effective magnetic permeability of said core, thereby improving the high frequency characteristics. Also the presence of said granular substance realizes a hardness in the vicinity of said adhesive higher than that of said thin plates of a high magnetic permeability, thereby improving the abrasion resistance of said core. Furthermore said adhesive layer is rendered satisfactorily thinner than said thin plate to prevent the loss of sensitivity. Furthermore a fixing member for supporting said core is made of such a composition as to be evenly abraded with said core, thereby preventing deformation of the head resulting from abrasion by the recording medium and thus enabling to maintain the initial electromagnetic converting characteristics over a prolonged period.
REFERENCES:
patent: 3683126 (1972-08-01), Krause
Amano Saichiro
Goto Atsushi
Hamana Junji
Kato Hiroaki
Kawakami Yoshio
Canon Denshi Kabushiki Kaisha
Canon Kabushiki Kaisha
Wolff John H.
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