PURPOSE: To perform sure discrimination by arranging a plurality of amorphous metallic fine wires different in magnetic pole inverting values, in parallel with the longitudinal direction of the bobbin body and besides, selecting the order of disposition, according to the descriptions of bobbin thread, on the top of the bobbin body consisting of a nonmagnetic material.
CONSTITUTION: An identification marker 3 constituted as a chip is buried in the recess 2 at the apex of a bobbin body 1 consisting of synthetic resin. For the identification marker 3, an amorphous magnetic metal fine wire HC6 and, in parallel with this and at equal intervals, amorphous magnetic metal fine wires HC1-HC5 are attached, so that they may be vertical to the bottom of a chip 3a, to the periphery of the columnar chip 3a consisting of, for example, synthetic resin as a nonmagnetic material. These amorphous nonmagnetic metal fine wires HC1-HC6 are different in magnetic pole inverting values, so the number of kinds capable of being discriminated becomes the fifth power of 2, that is, 32 kinds. Hereby, many descriptions can be surely discriminated, and an error in discrimination does not occur.
OGASAWARA ISAMU
KATSUYAMA TERUSHI
FUJII HIROSHI
UENO EISHIN
FUJI ELECTRIC CO LTD
TAKAGI SEIKO KK