Single-track video ferrite record/reproduce head and manufacturing method therefor
Combination magnetic head Patent #: 4531170
ApplicationNo. 289401 filed on 12/21/1988
US Classes:360/121, Plural gaps360/122, Head surface structure360/125Head core
ExaminersPrimary: Tupper, Robert S.
Attorney, Agent or Firm
Foreign Patent References
International ClassesG11B 005/265
Foreign Application Priority Data1985-11-30 JP
AbstractDisclosed is a magnetic head apparatus, which comprises a pair of magnetic cores defining a magnetic gap for recording and reproducing information, and grooves in the lateral faces of the magnetic cores, extending at right angles to those faces of the cores which are opposed to a magnetic recording medium or which define the magnetic cores. The grooves determine the width of the magnetic gap. That face of at least one of the magnetic cores which is opposed to the recording medium, is recessed from the remaining portion of the core, so as to cover a width equivalent to the length of the grooves, at the maximum. In the magnetic head of the invention, moreover, a nonmagnetic portion is formed at least on an erase gap, so that the degree of magnetic coupling between the erase gap and the recording medium is lower than that between a read/write gap and the medium. Thus, magnetic induction, which is produced in the erase core when data is read from the medium, is reduced.