Magnetic head read-to-write gap crossfeed shielding

Claim 2

In a read-after-write magnetic head having a tape-engaging face: a. a write magnetic circuit having an inside core piece and an outside core piece, said core pieces defining a write gap within said face of said magnetic head; b. a read magnetic circuit having An inside core piece and an outside core piece, said core pieces defining a read gap within said face of said magnetic head, said read gap being parallel with respect to said write gap; c. a cross-feed shield constructed of a highly permeable material and located between said write gap and said read gap, said shield extending parallel with respect to said gaps; d. a generally flat write flank shield mounted exclusively on said head face constructed of a highly permeable material; e. said write flank shield located exterior of said write gap for gathering stray flux which may be emitted from said write gap while not interfering with the signal at said write gap; f. a pair of generally flat end shields constructed of a highly permeable material, said end shields being located exclusively on said head face and between and in contact with said flank shield and said cross-feed shield for gathering stray flux which may be emitted from said write gap, said end shields being spaced apart with said write circuit being between said end shields; g. whereby, said flank shield, said end shields, and said crossfeed shield cooperate in gathering stray flux which may be emitted from said write circuit thereby preventing said flux from entering said read circuit.

Claim 3

The apparatus of claim 1 including: a. a generally flat read flank shield constructed of a highly permeable material located exclusively on said head face exterior of said read gap; and b. a pair of generally flat read end shields constructed of a highly permeable material, said read end shields being spaced apart with said read circuit being interior, said end shields being located exclusively on said head face between said read flank shield and said cross-feed shield, said read end shields being in contact with said read flank shiled, and separated from said write end shields by a gap and separated from said cross-feed shield.

Claim 4

In a read-after-write magnetic head having a tape-engaging face: a. a write magnetic circuit having an I-shaped inside core piece and an outside core piece, said core pieces defining a write gap within said face of said magnetic head, said outside core piece having a bottom leg, a vertically extending side leg having an outside vertical surface, and a top leg having a top surface, said top surface of said top leg and said vertical surface of said side leg defining a first edge; b. a read magnetic circuit having an inside core piece and an outside core piece, said core pieces defining a read gap within said face of said magnetic head, said read gap being parallel with respect to said write gap; c. a cross-feed shield constructed of a highly permeable material and located between said write gap and said read gap, said shield extending parallel with respect to said gaps; d. a generally flat write flank shield mounted exclusively on said head face constructed of a highly permeable material, said shield having a top surface and a side surface, said side surface and said top surface defining a second edge; e. said flank shield being located exterior of said write circuit with said second edge being proximate said first edge for gathering stray flux which may be emitted from said write gap; and f. a pair of generally flat end shields constructed of a highly permeable material, said end shields being located exclusively on said head face between and in contact with said flank shield and said cross-feed shield for gathering stray flux which may be emitted from said write gap, said end shields being spaced apart with said write circuit being located between said end shields; g. whereby, said flank shield, said end shields, and said cross-feed shield cooperate in gathering stray flux which may be emitted from said write circuit thereby preventing said flux from entering said read circuit.

Claim 5

In a read-after-write magnetic head having a tape-engaging face: a. a write magnetic circuit having an I-shaped inside core piece and an outside core piece, said core pieces defining a write gap within said face of said magnetic head, said outside core piece having a bottom leg, a vertically extending side leg having an outside vertical surface, and a top leg having a top surface, said top surface of said top leg and said vertical surface of said side leg defining a first edge; b. a read magnetic circuit having an inside core piece and an outside core piece, said core pieces defining a read gap within said face of said magnetic head, said read gap being parallel with respect to said write gap; c. a cross-feed shield constructed of a highly permeable material and located between said write gap and said read gap, said shield extending parallel with respect to said gaps; d. a generally flat write flank shield mounted exclusively on said head face constructed of a highly permeable material, said shield having a top surface and a side surface, said side surface and said top surface defining a second edge; e. said flank shield being located exterior of said write circuit with said second edge being proximate said first edge for gathering stray flux which may be emitted from said write gap; and f. a pair of generally flat end shields constructed of a highly permeable material, said end shields being located exclusively on said head face between and in contact with said flank shield and said cross-feed shield for gathering stray flux which may be emitted from said write gap, said end shields being spaced apart with said write circuit being located between said end shields; g. whereby, said flank shield, said end shields, and said cross-feed shield cooperate in gathering stray flux which may be emitted from said write circuit thereby preventing said flux from entering said read circuit.

Claim 6

The apparatus of claim 3 including: a. a generally flat read flank shield constructed of a highly permeable material located exclusively oN said head face exterior of said read gap; and b. a pair of generally flat read end shields constructed of a highly permeable material, said read end shields being spaced apart with said read circuit being interior, said end shields being located exclusively on said head face between said read flank shield and said cross-feed shield, said read end shields being in contact with said read flank shield, and separated from said write end shields by a gap and separated from said cross-feed shield.

Claim 7

In a two-channel read-after-write magnetic head having a tape-engaging face: a. a pair of spaced apart write magnetic circuits, each of said circuits having an inside core piece and an outside core piece, said inside core piece and said outside core piece for each circuit defining a write gap within the face of said magnetic head, said write gaps being parallel and coplanar; b. each of said outside core pieces having a horizontally extending bottom leg, a vertically extending side leg having an outside vertical surface, and a horizontally extending top leg having a top surface, said top surface of each of said top legs and said vertical surface of each of said side legs defining a first edge; c. a pair of spaced apart read magnetic circuits, each of said circuits having an inside core piece and an outside core piece, said inside core piece and said outside core piece of each of said circuits defining a read gap within the face of said magnetic head, said read gaps being parallel and coplanar with respect to each other and parallel with respect to said write gaps; d. a cross-feed shield constructed of a highly permeable material located between said write gaps and said read gaps and extending parallel with respect to said gaps; e. a generally flat flank shield mounted exclusively on said head face constructed of a highly permeable material for gathering stray flux which may be emitted from said write gap, said shield having a top surface and a side surface, said side surface and said top surface defining a second edge; f. said flank shield being located exterior of said write circuits with said second edge being proximate said first edge; and g. a pair of generally flat end shields constructed of a highly permeable material, said end shields being located exclusively on said head face between and in contact with said flank shield and said cross-feed shield for gathering stray flux which may be emitted from said write gap, said end shields being spaced apart with said write circuits being between said end shield, h. whereby, said end shields, said flank shield and said cross-feed cooperate in gathering any stray flux which may be emitted from said write circuit for preventing said flux from being introduced within said read circuit.

Claim 8

In a two-channel read-after-write magnetic head having a tape-engaging face: a. a pair of spaced apart write magnetic circuits, each of said circuits having an inside core piece and an outside core piece, said inside core piece and said outside core piece for each circuit defining a write gap within the face of said magnetic head, said write gaps being parallel and coplanar; b. each of said outside core pieces having a horizontally extending bottom leg, a vertically extending side leg having an outside vertical surface, and a horizontally extending top leg having a top surface, said top surface of each of said top legs and said vertical surface of each of said side legs defining a first edge; c. a pair of spaced apart read magnetic circuits, each of said circuits having an inside core piece and an outside core piece, said inside core piece and said outside core piece of each of said circuits defining a read gap within the face of said magnetic head, said read gaps being parallel and coplanar with respect to each other and parallel with respect to said write gaps; d. a cross-feed shield constructed of a highly permeable material located between said write gaps and said read gaps and extending parallel with respect to said gaps; e. a generally flat flank shield mounted exclusively on said head face constructed of a highly permeable material for gathering stray flux which may be emitted from said write gap, said shield having a top surface and a side surface, said side surface and said top surface defining a second edge; f. said flank shield being located exterior of said write circuits with said second edge being proximate said first edge; and g. a pair of generally flat end shields constructed of a highly permeable material, said end shields being located exclusively on said head face between and in contact with said flank shield and said cross-feed shield for gathering stray flux which may be emitted from said write gap, said end shields being spaced apart with said write circuits being between said end shield, h. whereby, said end shields, said flank shield and said cross-feed cooperate in gathering any stray flux which may be emitted from said write circuit for preventing said flux from being introduced within said read circuit.

Claim 9

The apparatus of claim 5 including a cross-talk shield constructed of a highly permeable material located between said write circuits for reducing cross-talk between write circuits and also reducing cross-feed between said write circuits and said read circuits.

Claim 10

The apparatus of claim 5 including: a. a generally flat read flank shield constructed of a highly permeable material located exclusively on said head face exterior of said read pags; and b. a pair of generally flat read end shields constructed of a highly permeable material, said read end shields being spaced apart with said read circuit being interior, said end shields being located exclusively on said head face between said read flank shield and said cross-feed shield, said read end shields being in contact with said read flank shield, and separated from said write end shields by a gap and separated from said cross-feed shield.