Patent ID: 7944649

Claim:
An anti-rotation guide apparatus for a transducer positioning apparatus of a data storage machine that reads and writes data to a storage medium, a base, a tower extending from the base at one end, a transducer head for reading and writing data to a storage medium that is secured to a frame, the frame is movably attached to the tower for limited movement toward and away from the base, the transducer head is pivotable to limited extent with the frame relative to the tower about a pivot axis when the storage medium reverses direction, the anti-rotation guide apparatus comprising; an anti-rotation flange of the frame that extends radially from the pivot axis; a ball disposed proximate the anti-rotation flange of the frame; a magnet attached to the tower that acts upon the anti-rotation flange of the frame to bias the transducer head against rotation about the pivot axis when the storage medium reverses direction, wherein the frame rolls on the ball relative to the tower.