Magnetic head element, magnetic head, pressure plate using magne

Details Magnetic head element, magnetic head, pressure plate using magne Magnetic head element, magnetic head, pressure plate using magne

1999-08-24

2000-12-05

Perkey, W. B.

Photography

With data recording

Magnetically on film or film cassette

396440, 360125, G03B 1724, G11B 5227

Patent

active

061577863

ABSTRACT:
A first magnetic core has a first portion that determines the track width, a second portion extending from the first portion substantially vertically, a third portion that extends from the second portion substantially vertically and is longer than the first track width, and a fourth portion extending from the third portion substantially vertically. The first to fourth portions form a substantially rectangular ring-like shape with its portion between the first and second portions being notched. A second magnetic core has a fifth portion longer than the first track width, a sixth portion extending from the fifth portion substantially vertically, and a seventh portion extending from the sixth portion substantially vertically. The fifth to seventh portions form substantially the shape of letter C. The first and second magnetic cores are joined to each other so that the first and fifth portions are joined through a gap spacer, the outer circumferential surfaces of the first and fifth portions form a surface to be brought into slidable contact with a magnetic medium, and at least parts of the third and seventh portions and at least parts of the fourth and sixth portions are respectively stacked and joined to each other.

REFERENCES:
patent: 5721652 (1998-02-01), Jessop et al.
patent: 5815756 (1998-09-01), Akami et al.
patent: 5987267 (1999-11-01), Miyamoto et al.

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