To consist of the magnetic substance of the pair which is used combining with the back core where the front core null coil for the magnetic erasing head which is produced

摘要

PROBLEM TO BE SOLVED: To reduce the time for working and the cost of grind stones which are consumables by omitting cutting of grooves etc., in a method for manufacturing a front core for magnetic erasing heads and a front core manufactured by the method.;SOLUTION: A pair of long-sized magnetic material rod stocks A and B worked and molded by sintering to a form that a gap G can be formed are held opposite to each other leaving prescribed spacing. Resin G is injected into a recessed part 11 and a gap groove 13 formed in such a manner to integrate the rod stocks A and B, which are then worked. The recessed part 11 and the gap groove 13 are formed without cutting.;COPYRIGHT: (C)2004,JPO