can be achieved smoothly several wires may be arranged so as to extend in the paper feeding direction and function in the same manner as the paper holding member 54 inside the cover 24 a clearance e the depth of which is equal to or smaller than the thickness of the perforated paper 4 to be used is formed between the paper holding surface 66 and the paper feed surface 52 of the feed belt 6 alternatively the paper holding surface 66 contacts the paper feed surface 52 of the feed belt 6 with such a small force that does not hamper the paper feeding operation the depth of a clearance f between the lower surface of the float preventing rib 44 and the paper feed surface 50 of the side frame 18 is set equal to a maximum thickness of the perforated paper 4 to be used the depth of the clearance e between the paper holding surface 66 of the paper holding member 54 and the paper feed surface 52 of the feed belt 6 is naturally far smaller than that of this clearance f referring to fig7 the height g of the recess 62 provided in each lip receiver 60 is larger than the thickness h of the paper holding member 54 and the length j of the recess 62 smaller than that of length k of the slide lip 58 of the paper holding member 54 owing to such construction of the cover 24 and paper holding member 54 the paper holding member 54 can be elastically deformed with the paper holding surface 66 thereof.