An apparatus for manufacturing magnet segments constituting a field pole magnetic body formed by cleaving a magnetic body at a plurality of scheduled cleaving parts is provided. The apparatus includes placing tables on which a magnetic body having a coating applied to an outer surface thereof is placed, a pressing unit that cleaves the magnetic body by pressing the magnetic body from an opposite side of an incision at a scheduled cleaving part arranged between two of the placing tables, and a cutting unit that cuts the coaling of the magnetic body present at the scheduled cleaving part after the magnetic body is cleaved, by applying a moment in a direction opposite to a moment generated in the magnetic body between the two placing tables at the time of cleaving. Cleaving divides the magnetic body into a magnet segment and an uncleaved magnetic body.

A container-unroller for film, aluminum sheet or similar material wrapped around a roll where the container-unroller has a tubular body for the accommodation of a roll to be contained and a means for control of one-way rotation of said roll. A means for making a hot electric cut and a means for making a tear cut are positioned on the same device where the means for making a tear cut are a metallic saw-toothed bar, connected to electric current. means for making a hot electric cut.