Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1981-07-23
1985-01-15
Cardillo, Jr., Raymond F.
Facsimile and static presentation processing
Facsimile
Recording apparatus
369 32, 369 33, 369 44, 369 46, G11B 700, G11B 2108, G11B 2110, H04N 576
Patent
active
044941544
ABSTRACT:
A pickup control device for a data reading device in which, for fast or slow reproduction modes, a slider motor is forcibly driven to change the relative position of the pickup and the disk in a radial direction of the disk after which the pickup is set to a normal or center position thereof. A slider motor for changing the relative position of the pickup and the disk is driven in response to a fast or slow reproduction instruction and a position signal representative of the position of the pickup is produced with which a tracking servo loop is opened for a predetermined period of time during which the pickup is returned to its normal position. With this construction, the pickup is prevented from returning to a first track from a second track to which it has jumped through a scratch or the like.
REFERENCES:
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patent: 3911211 (1975-10-01), Rennick
patent: 3976828 (1976-08-01), Janssen
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patent: 4057832 (1977-11-01), Kappert
patent: 4236232 (1980-11-01), Jansen et al.
patent: 4330880 (1982-05-01), Van Disk
patent: 4359635 (1982-11-01), Gross
patent: 4397009 (1983-08-01), Eriksson
Jongen et al., Optical Disc Drive, Int. Conf. on Video and Data Recording, Southhampton, Eng., 24-27 Jul. 1979, 8 pp.
Cardillo, Jr. Raymond F.
Universal Pioneer Corporation
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