Magnetic disc cartridge with ventilating structure

Details Magnetic disc cartridge with ventilating structure Magnetic disc cartridge with ventilating structure

1983-02-01

1987-01-13

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record transport with head stationary during transducing

Disk record

360 99, G11B 2504, G11B 2302

Patent

active

046368914

ABSTRACT:
A magnetic disc in a cartridge is ventilated to keep a data containing surface portion thereof substantially free of particulate materials. A recirculating gas path includes apertured conduits for supplying gas jets completely across the portion as the disc is rotating in an enclosure. An orifice removes gas from the enclosure. A fan circulates the gas removed from the enclosure through the orifice and supplies the circulated gas back to the apertured conduits. Magnetic heads are positioned relative to the orifice and an inlet for the gas jets such that the gas has laminar flow as the gas passes the magnetic heads so the gas flow does not affect the position of the heads relative to the disc portion. The recirculating path includes filters for removing particulate materials from the recirculating gas.

REFERENCES:
patent: 3740735 (1973-06-01), Gabor
patent: 3812534 (1974-05-01), Rousseau et al.
patent: 3846835 (1974-11-01), Horovitz et al.
patent: 4078246 (1978-03-01), Berthoux et al.
patent: 4194225 (1980-03-01), Hasler
patent: 4285018 (1981-08-01), Mulvany et al.
patent: 4377830 (1983-03-01), Patel
Bosier, M. H., "Contamination Control System for a Disk Cartridge", Jun. 1979, vol. 22, No. 1, pp. 360-361.

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