G - Physics – 03 – G
Patent
G - Physics
03
G
352/31, 352/29.1
G03G 19/00 (2006.01) G11B 5/41 (2006.01) G11B 5/58 (2006.01) G11B 5/60 (2006.01) G11B 21/00 (2006.01) G11B 21/21 (2006.01) G11B 23/50 (2006.01)
Patent
CA 1221164
ABSTRACT Problems of wear and bounce created by imperfections in the surface of a magnetic recording medium, such as a chromium dioxide-coated drum, are circumvented by a hydrodynamic magnetographic imaging technique that provides the intended effective intimate contact between the recording head and the magnetographic recording surface. A liquid (e.g. water) is applied to the surface of the drum slightly upstream of the location of the recording head, so as to create a liquid bearing against which the recording head is urged, and thereby intimately magnetically coupled with the surface of the drum, except for an extremely thin liquid film between the head and drum surface. As a result of this extremely thin liquid bearing, continuous pressure can be applied to the head to maintain the head in effective intimate contact with the surface of the recording medium without the fear of scratching the medium or causing wear on the head.
460290
Bardos Andrew M.
Holmes Jon F.
Harris Graphics Corporation
Shapiro Cohen
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