Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1991-08-05
1994-02-22
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
G11B 552
Patent
active
052893260
ABSTRACT:
An aluminum alloy ring (the outside diameter D.sub.1) which is an element of a rotary head cylinder, is inserted in a cavity (the inside diameter D.sub.2 >D.sub.1) of a fixed metal mold, with a clearance gap (D.sub.2 -D.sub.1) Then, the cavity of the fixed metal mold is closed by a movable metal mold, and the inner space of the aluminum alloy ring is filled with molten synthetic resin material. The filling resin is pressurized so that the aluminum alloy ring elastically expands until the outer diameter thereof D.sub.1 becomes exactly or almost equal to D.sub.2. After that, the filling synthetic resin material is cooled. Thus, the aluminum alloy ring and the synthetic resin material are integrated, resulting in a rotary head cylinder molding.
REFERENCES:
patent: 4664900 (1987-05-01), Miyazaki et al.
patent: 4885653 (1989-12-01), Kato
patent: 4934577 (1990-06-01), Sugimoto et al.
Hanafusa Hiroshi
Kobayashi Kenji
Matsuwaka Tetsunori
Ogawa Takashi
Ogino Tomonobu
Heinz A. J.
Matsushita Electric - Industrial Co., Ltd.
LandOfFree
Rotary head cylinder produced by injection of pressurized resin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rotary head cylinder produced by injection of pressurized resin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotary head cylinder produced by injection of pressurized resin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-176270