Magnetic disc surface treatment and apparatus

Details Magnetic disc surface treatment and apparatus Magnetic disc surface treatment and apparatus

1989-12-21

1991-05-07

Schmidt, Frederick R.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51141, 51145R, B24B 2100

Patent

active

050126180

ABSTRACT:
Method and apparatus for treating the surface of a magnetic disc to remove surface asperities and loosely bound material. The disc is alternatively treated by contact with a pair of moving belt-like tapes, a pair of flying heads, and second contact with the belt-like tape, with the disc carried at a fixed position for rotation in a vertical plane throughout, but rotated at a higher speed during the intermediate flying waffling step. The first and/or second tape-treatment steps can be used to apply a lubricant film to the disc surface.

REFERENCES:
patent: 3524284 (1970-08-01), Meane
patent: 3971163 (1976-07-01), Thombley et al.
patent: 4075791 (1978-02-01), Koide et al.
patent: 4535567 (1985-08-01), Seaborn
patent: 4656790 (1987-04-01), Mukai et al.
patent: 4671018 (1987-06-01), Ekhoff
patent: 4796387 (1989-01-01), Johnson

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