Optical disk and disk chucking mechanism

Details Optical disk and disk chucking mechanism Optical disk and disk chucking mechanism

1994-11-22

1997-09-09

Levy, Stuart S.

Dynamic information storage or retrieval

Storage medium structure

Specified center hole or locating structure

369270, G11B 370, G11B 2300

Patent

active

056663471

ABSTRACT:
A plate made of a magnetic material is secured to an optical disk so that it closes a central hole formed in a disk substrate. An optical disk chucking mechanism for chucking the optical disk to a disk table attracts the magnetic plate by the magnet to cause a platen to abut to the disk substrate and a tapered portion to abut to the inner side of the central hole so that the optical disk is restricted in position and is held. The optical disk and optical disk chucking mechanism restrict the loading position of the optical disk on the disk table independently of the mounting position of the magnetic plate on the disk substrate.

REFERENCES:
patent: 4351047 (1982-09-01), Redlich et al.
patent: 4510592 (1985-04-01), Kanamaru et al.
patent: 4539671 (1985-09-01), Higashihara
patent: 4587647 (1986-05-01), Mak et al.
patent: 4694370 (1987-09-01), Ommori et al.
patent: 4951277 (1990-08-01), Masunaga et al.
patent: 5034933 (1991-07-01), Fujisawa et al.
patent: 5050158 (1991-09-01), Kitada et al.
IBM Technical Disclosure Bulletin, vol. 26, NO. 3A, Aug. 1983, New York, USA, p. 1243, F. S. Luecke: `Disk-centering hub.`
Patent Abstracts of Japan, vol. 13, No. 322 (P-902), 20 Jul. 1989 & JP-A-10 88 951 (Matsushita), 3 Apr. 1989.
Patent Abstracts of Japan, vol. 9, No. 33 (P-334), 13 Feb. 1985 & JP-A-59 175 079 (Matsushita), 3 Oct. 1984.

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