PURPOSE: To prevent shaking of a ferrite material to be burned and to improve a yield by providing a recessed part and a projecting part on the lower side of a ring coming into contact with the ferrite material to be burned and on the upper side of a support base thereof respectively and by fitting the two parts to each other.
CONSTITUTION: Recessed parts 13a are provided at four places on the lower side of a ring 13 and projecting parts 12a at four places on the upper side of a support base 12 respectively and the ring 13 is fixed on the support base 12 with these recessed and projecting parts fitted to each other. At the time of packing in a kiln and burning, the ring 13 and a ferrite material to be burned are prevented from shaking and thereby lowering of a yield of a burned ferrite product can be prevented.
EGUCHI TADAO
OSAKI MASATOSHI
