Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1990-02-21
1991-04-09
Tupper, Robert S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9908, 369270, 369271, G11B 17028
Patent
active
050069454
ABSTRACT:
A dual-side use disk player comprises a pressure applying mechanism and a position select/hold mechanism. The pressure applying mechanism includes an attracting force generating mechanism for attracting a pressure member toward a turntable. The pressure applying mechanism applies a disk pressing force to the pressure member for pressing a disk against the turntable. The pressure member holds a second centering member to be inserted into a center hole of a circular substrate placed on the side of the disk which is out of contact with the turntable. When a support member for supporting the pressure member is at a non-clamping position or farthest from the turntable, the position select/hold mechanism holds the pressure member at a position apart from the disk carrying surface of the turntable. When the support member is at a first clamping position and a second position, the position select/hold mechanism is out of contact with the pressure member. With the movement of the support member between the first clamping position and the second clamping position, the position select/hold mechanism positions the second centering means at an insertion allowing position where the second centering means is allowed to be inserted into the center hole of the circular substrate, and an insertion prohibiting position where the second centering means is prohibited from being inserted thereinto. Further, when the support member is at the second position and the second centering member is at the insertion allowing position, the second centering member is closer to the support member than the disk contact member.
REFERENCES:
patent: 4541086 (1985-09-01), Tanaka
patent: 4771416 (1988-09-01), Ishibashi et al.
Pioneer Electronic Corp.
Tupper Robert S.
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