Method of manufacturing magnetic recording heads

Claim 1

THE METHOD OF MANUFACTURING A THIN MAGNETIC RECORDING AND REPRODUCING HEAD COMPRISING (A) PRESSURE INJECTION MOLDING A THIN NON-CONDUCTIVE MATERIAL ABOUT THE MID PORTION OF TWO GENERALLY C-SHAPED POLE PIECES TO FORM A WINDING BASE ON EACH OF SAID POLE PIECES, (B) WINDING A PREDETERMINED NUMBER OF TURNS OF ELECTRICAL CONDUCTIVE WIRE ABOUT SAID WINDING BASE TO FORM A WINDING ON EACH OF SAID POLE PIECES, (C) ASSEMBLING SAID WOUND POLE PIECES IN FACE-TO-FACE RELATIONSHIP TO EACH OTHER, LOCATING THE PORTIONS OF SAID POLE PIECES CARRYING SAID WINDINGS IN THE DEPRESSION OF THE BASE OF A PRESSURE INJECTION MOLD ADAPTED TO FORM A UNITARY BODY AROUND SAID WOUND POLE PIECES AND INSERTING A THIN, NON-MAGNETIC SPACER BETWEEN AT LEAST ONE PAIR OF THE CONFRONTING TIPS OF SAID POLE PIECES, (D) APPLYING NON-YIELDING, TEMPORARY PRESSURE AGAINST PORTIONS OF THE BACK OF ONE OF SAID POLE PIECES AT POINTS LOCATED BEYOND THE LIMITS OF SAID DEPRESSION AND AGAINST SAID MOLD, SAID NON-YIELDING, TEMPORARY PRESSURE APPLIED IN SUCH A MANNER THAT SAID SPACER IS FORCIBLY CLAMPED BETWEEN SAID CONFRONTING TIPS, (E) PRESSURE INJECTION MOLDING A NON-CONDUCTIVE MATERIAL ABOUT SAID ASSEMBLED POLE PIECES TO FORM SAID UNITARY BODY, SAID UNITARY BODY HAVING AT LEAST ONE END OF SAID ASSEMBLED POLE PIECES WHICH INCLUDES A PORTION OF SAID CONFRONTING TIPS HAVING SAID SPACER THEREBETWEEN PROTRUDING FROM THE SIDE THEREOF AND AT LEAST ONE END OF EACH OF SAID WINDINGS PROTRUDING FROM THE SIDE THEREOF AND A FINISHED THICKNESS LESS THAN ABOUT 3 TIMES THE THICKNESS OF SAID POLE PIECES, AND (F) RELEASING SAID PRESSURE FROM SAID POLE PIECES AFTER SAID NON-CONDUCTIVE MATERIAL HAS SET.

Claim 2

THE METHOD OF MANUFACTURING A THIN MAGNETIC RECORDING AND REPRODUCING HEAD COMPRISING (A) PRESSURE INJECTION MOLDING A THIN NON-CONDUCTIVE MATERIAL ABOUT THE MID PORTION OF TWO GENERALLY C-SHAPED POLE PIECES TO FORM A WINDING BASE ON EACH OF SAID POLE PIECES, (B) WINDING A PREDETERMINED NUMBER OF TURNS OF ELECTRICAL CONDUCTIVE WIRE ABOUT SAID WINDING BASE TO FORM A WINDING ON EACH OF SAID POLE PIECES, (C) ASSEMBLING SAID WOUND POLE PIECES IN FACE-TO-FACE RELATIONSHIP TO EACH OTHER, LOCATING THE PORTIONS OF SAID POLE PIECES CARRYING SAID WINDINGS IN THE DEPRESSION OF THE BASE OF A PRESSURE INJECTION MOLD ADAPTED TO FORM A UNITARY BODY AROUND SAID WOUND POLE PIECES AND INSERTING A THIN, NON-MAGNETIC SPACER BETWEEN AT LEAST ONE PAIR OF THE CONFRONTING TIPS OF SAID POLE PIECES, (D) APPLYING NON-YIELDING, TEMPORARY PRESSURE AGAINST PORTIONS OF THE BACK OF ONE OF SAID POLE PIECES AT POINTS LOCATED BEYOND THE LIMITS OF SAID DEPRESSION AND AGAINST SAID MOLD, SAID NON-YIELDING, TEMPORARY PRESSURE APPLIED IN SUCH A MANNER THAT SAID SPACER IS FORCIBLY CLAMPED BETWEEN SAID CONFRONTING TIPS, (E) PRESSURE INJECTION MOLDING A NON-CONDUCTIVE MATERIAL ABOUT SAID ASSEMBLED POLE PIECES TO FORM SAID UNITARY BODY, SAID UNITARY BODY HAVING AT LEAST ONE END OF SAID ASSEMBLED POLE PIECES WHICH INCLUDES A PORTION OF SAID CONFRONTING TIPS HAVING SAID SPACER THEREBETWEEN PROTRUDING FROM THE SIDE THEREOF AND AT LEAST ONE END OF EACH OF SAID WINDINGS PROTRUDING FROM THE SIDE THEREOF AND A FINISHED THICKNESS LESS THAN ABOUT 3 TIMES THE THICKNESS OF SAID POLE PIECES, AND (F) RELEASING SAID PRESSURE FROM SAID POLE PIECES AFTER SAID NON-CONDUCTIVE MATERIAL HAS SET.