Magnetic head assembly with low read to write crosstalk

Claim 2

A magnetic tape recording head, including longitudinally spaced read and write electromagnetic transducers, each including a core of magnetic material having a gapped front face and a winding, the improvement comprising a crosstalk-reducing shield of a magnetic material, including a first panel positioned between said transducer cores, and a second panel the plane of which extends longitudinally outwardly from the outer edge of said read transducer front face, and means providing a low reluctance magnetic flux path between said first and second shield panels.

Claim 3

The recording head of claim 1, wherein said shield is formed of a magnetically soft, low reluctance material.

Claim 4

The recording head of claim 2, wherein the distance between said write transducer and said first panel is less than the distance between said read transducer and said first panel.

Claim 5

The recording head of claim 2, wherein said low reluctance path means comprises a pair of parallel third panels of a magnetically soft, low reluctance material extending between said first and second panels above and below said read transducer.

Claim 6

The recording head of claim 2, wherein the inner edge of said second panel is spaced from said read transducer core.

Claim 7

The recording head of claim 2, wherein said first panel extends from the level of said transducer core front faces at their inner edges to a point shortly behind the rear edges of said transducer cores.

Claim 8

The recording head of claim 1 wherein said first panel is formed of a combination of mu metal and ferrite.

Claim 9

The recording head of claim 1 wherein said front panel is formed of a plurality of layers of ferrite and mu metal, the amount of ferrite being about 3 to 4 times the amount of mu metal.

Claim 10

The recording head of claim 1, including A plurality of said read and write transducers arranged in a pair of longitudinally spaced banks of transversely spaced similar transducers, each including a winding carrying magnetic core with a transversely gapped front face, said first panel being positioned between said transducer banks and being longitudinally offset toward said bank of write transducers and extending from about the plane between the front faces of said transducer banks to shortly behind said transducer banks, said second panel lying substantially in the plane of the front face of said read transducer cores and having an inner edge spaced closely to the outer edge of said front face of said bank of read transducers, and said low reluctance path means comprises a pair of parallel transversely spaced third panels connecting the respective ends of said first and second panels.

Claim 11

The recording head of claim 9, where said transducer banks are disposed approximately midway between said third panels.

Claim 12

The recording head of claim 9 wherein the distance between the inner edge of said second panel and the outer edge of said read transducer bank provides a null point for all heads.

Claim 13

The recording head of claim 9, wherein the distance between the inner edge of said second panel and the outer edge of said read transducer bank front face is between 0.002 and 0.017 inch.

Claim 14

The recording head of claim 9, wherein the outer edge of said bank of read transducer cores is stepped to define a longitudinally angular groove, the inner border of said second panel registering with said grooves and spaced from the faces thereof.