Magnetic transducer head core manufacturing method

Claim 1

In a method for manufacturing a magnetic transducing core comprising C and I elements bonded together and forming a common surface for transducing, and between facing C and I element surfaces intersecting the transducing surface, forming a flux gap in the flux path formed by the elements, an improvement for forming the shallower of the two faces forming the flux gap with a depth equal to a first precisely predetermined distance, and comprising the steps of: a. before bonding the elements together, i. machining on the I element a reference surface spaced apart from the transducing surface portion thereon, and ii. machining along the width dimension of the I element flux gap face a notch whose length is at least the width of the C element's flux gap face and whose line of intersection with the I element flux gap face nearer the I element transducing surface portion is spaced therefrom at least the first predetermined distance and is a second precise predetermined distance from the reference surface; b. forming the C element with the depth of the flux gap face thereon greater than the first predetermined distance; c. bonding the C element to the I element to form the flux gap, with one edge of the C element flux gap face opposing and within the notch; and d. machining the transducing surface until the distance between the transducing surface and the reference surface equals the sum of the first and second predetermined distances.