PURPOSE:To accomplish reliable force-feed without trouble by disposing plural sets of pressor capable of freely sliding along the direction of the cylinder center on both sides of an elastic cylinder, and sequentially force-feeding fed material to a delivery port of the elastic cylinder. CONSTITUTION:Plural sets of pressors 2, at least one of which is capable of freely sliding, are disposed along the direction of cylinder center on both sides of an elastic cylinder 20 to clamp the elastic cylinder 20 in the direction orthogonal to the cylinder center. A driving device 1 is formed so that the driving force is used as force for sequentially clamping the elastic cylinder 20 by the paired pressors 2 and force-fed material is sequentially force-fed toward a delivery port of the elastic cylinder 20. Thus, reliable force-feed without trouble can be accomplished and the apparatus is reduced in size.
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