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THE NEW THEORY OF RAISING FOR DOUBLE ACTING RAISING MACHINE. By Masaki Kato It is said that the magnitude of raising power depends upon the magnitude of relative velocity between the cloth and the point of raising wire of the counter pile roller, and then the cloths are raised by this sliding action. In the practical raising operation, however, I cannot recognize that there is the sliding action and the magnitude of raising power is equal to the magnitude of raising effect. The writer concludes that by the differential motion, the counter pile rollers are rotated with the cloth and with the belt band, then the difference of rotation counts reduce to the raising power and the counter pile rollers drive on the cloth without sliding, when the points of the raising wire leave for the cloth, the fibres are digged upon. Moreover, the raising effect depends upon the contact times of the wire point on the definite length of the cloth. Further, it is not discussed yet how the running direction of the raised pile arises in the practical application. If we considered it merely by the relative velocity between the cloth and the poin of wire, it should be the reverse of the practical raising result. (Received 22. 7.1955)