Method for making a magnetic head drum for a magnetic recording

Details Method for making a magnetic head drum for a magnetic recording Method for making a magnetic head drum for a magnetic recording

1996-09-03

1998-06-09

Bryant, David P.

Metal working

Method of mechanical manufacture

Combined manufacture including applying or shaping of fluent...

264267, 26432811, 360107, 36013024, B21B 146

Patent

active

057617880

ABSTRACT:
A magnetic head drum for a magnetic recording apparatus comprising a metallic ring of a predetermined thickness, and a support body of a plastic material formed in said metallic ring through an outsert forming process. The support body of the plastic material includes a peripheral ring-shaped portion, a central boss portion for receiving a rotating shaft and a web portion connecting the ring-shaped portion with the boss portion. A plurality of magnetic heads are provided on a periphery of the drum to rotate as a unit with the metallic ring. There is also disclosed a method for manufacturing the magnetic head drum through an injection molding process of a plastic material using a metallic ring of a predetermined thickness.

REFERENCES:
patent: 3608049 (1971-09-01), Tavella
patent: 5289326 (1994-02-01), Matsuwaka et al.
Patent Abstracts of Japan, vol. 12, No. 429 (P-785), 14 Nov. 1988 & JP 63-161558 A (Canon), 5 Jul. 1988--Abstract.

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