Apparatus for recording on opposite faces of flexible magnetic d

Details Apparatus for recording on opposite faces of flexible magnetic d Apparatus for recording on opposite faces of flexible magnetic d

1984-06-21

1986-07-29

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Drum record

360 99, G11B 554

Patent

active

046033645

ABSTRACT:
An apparatus for recording flexible magnetic disks contained in envelopes comprises a mandrel engageable with a central zone of the disk to rotate the disk within the envelope, and a carriage 41 which is movable radially relative to the disk and on which there is mounted a pair of magnetic heads which oppose each other and make contact with the magnetizable surfaces of the disk. The upper head is carried by a support (85) movable on the carriage and urged by a first spring (87) toward the disk. A presser pad, which presses the envelope containing the disk against a reference surface of the appartaus, is lowered by an electromagnet which also causes the upper head to lower. A lost-motion form of coupling enables the pad and upper head to carry out independently adjustable travel strokes, so minimizing any recoil. The coupling comprises a lever (100) biased by a second spring (102) which is moved by the armature after a stroke regulated by a first adjustable stop (106) to allow the contact of the upper head (84) with the disk. When the electromagnet (90 ) is de-energized its armature (92) retracts the pad and the lever (100) lifts off the upper head (84) but only to an extent permitted by a second adjustable stop (103).

REFERENCES:
patent: 3678481 (1972-07-01), Dalziel et al.
patent: 3815150 (1974-06-01), Stoddard et al.
patent: 4089029 (1978-05-01), Castrodale et al.
patent: 4216510 (1980-08-01), Manzke et al.
patent: 4405957 (1983-09-01), Vorbach et al.
patent: 4437132 (1984-03-01), Shimaoka

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