Method of manufacturing a multiple magnetic recording

Claim 1

A METHOD OF MANUFACTURING MAGNETIC HEADS WHICH HAVE EQUAL SELF INDUCTANCE CHARACTERISTICS AND HIGH RELUCTANCE THROUGH THE GAPS COMPRISING THE STEPS OF FORMING HEAD HALVES TO READILY MAINTAINED MANUFACTURING TOLERANCES, REMOVABLY SECURING A PLURALITY OF HEAD HALVES THUS FORMED IN A JIG WITH THE GAP DEFINING SURFACES SUBSTANTIALLY ALIGNED AND EXPOSED, FORMING A GROOVE IN EACH SAID SURFACE IN A PLANE NORMAL TO SAID SURFACE AND SPACED FROM THE ADJACENT END OF EACH OF SAID HEAD HALVES A DISTANCE AT LEAST AS GREAT AS A DESIRED GAG HEIGHT IN ONE OPERATION, AND TRIMMING THE ADJACENT END OF EACH OF SAID HEAD HALVES IN A PLANE PARALLEL TO THE PLANE OF SAID GROOVE IN A SECOND OPERATION TO FORM POLE PIECES ON SAID HEAD HALVES HAVING IDENTICAL DETERMINED GAP HEIGHTS WHEN SAID HEAD HALVES THUS FORMED ARE ASSEMBLED TO FORM A MAGNETIC HEAD.