PURPOSE: To improve the productivity by adjusting a pressure of a fluid bearing of a grip roller which has been provided in parallel to a feed roller and divided into plural pieces, when feeding simultaneously a material of plural lines, absorbing a dispersion in thickness of each material by the fluid bearing, and feeding uniformly each material.

CONSTITUTION: A grip use roller shaft 13 is provided on the upper part of a feeding roller 11 so that it can move freely upward and downward. Subsequently, a coil spring 14 is engaged and attached to both ends of the shaft 13 and always energizes the feeding roller 11. Subsequently, a grip use roller 15 divided into plural pieces is supported by the shaft 13 through a fluid bearing 16. Next, a fluid consisting of a gas such as air, etc., or a liquid is fed to the inside of the fluid bearing 16, and a grip pressure to a material 17 is adjusted independently by a pressure of the fluid, respectively. Accordingly, a ribbon-shaped material 17 of plural lines can be fed by inserting and holding it by the same grip pressure.