Wasp waist head for flying flexible magnetic storage medium over head

Abstract

Abstract IN ROTATING HEAD MAGNETIC RECORDERS HIGH DENSITY RECORDING WITH LITTLE OR NO WEAR TO THE MAGNETIC HEAD OR THE MAGNETIC TAPE HAS BEEN ACHIEVED WITH A WASP-WAIST FLYING HEAD. THE TAPE FLIES IN THE RANGE OF APPROXIMATELY 20-50 MICROCINCHES FROM THE SURFACE OF THE HEAD. INITIALLY THE TOP SURFACE OF THE HEAD IS SINGLE RADIUS OR BI-RADIUS IN CONTOUR. SIDES OF THE HEAD ARE BEVELED SO AS TO GIVE A WASP-WAIST SHAPE TO THE TOP SURFACE OF THE HEAD. FURTHER, THE TOP SURFACE OF THE HEAD IS POLISHED, USUALLY WITH ABRASIVE TAPE TO SMOOTH SHARP EDGES OF THE HEAD AND ALSO TO MORE NEARLY CONFORM THE TOP SURFACE OFTHE HEAD TO THE AERODYNAMIC BULGE IN THE MAGNETIC TAPE THAT OCCURS AS THE TAPE FLIES OVER THE HEAD. THE HEAD IS MOUNTED WITH THE WIDER PORTION OF FRONTAL FACE OF ITS TOP SURFACE FORMING AN ANGLE OF A TTACK BETWEEN THE FRONTAL FACE AND THE MEDIUM. AIR CAUGHT BETWEEN THIS FRONTAL FACE AND THE TAPE IS LATER PARTIALLY DISSIPATED AS THE TAPE MOVES PAST THE NARROW WAIST OF THE TOP SURFACE OF THE HEAD. INITIALLY AN AIR WEDGE LIFTS THE TAPE AWAY FROM THE HEAD, AND SUBSEQUENTLY THE TAPE IS LOWERED UNIFORMLY TOWARDS THE NARROW WAIST OF THE HEAD AS THE HEAD MOVES UNDER THE TAPE. THE READ/WRITE GAP WOULD BE LOCATED SOMEWHERE IN THE REGION OF THE NARROW WAIST WHERE THE FLYING HEIGHT IS RELATIVELY UNIFORM AND CONTROLLABLE WITHIN THE DESIRABLE RANGE OF 20-50 MICROINCHES.

Inventors

• 👤 F Freeman
• 👤 W Golz
• 👤 W Taylor

Bibliographic Details