Abstract: The invention relates to a method and package for packaging a web. In the method of the invention, a web is slit into two or more narrower webs which are folded into superimposed layers. The method comprises the steps of directing the webs to a nip formed by two rotating reels and by inducing the webs, held alternately against the surfaces of the first and the second reel, to move with the reel the length of a predetermined rotational angle to provide folding, and joining the ends of the webs together so that the webs form a continuous whole whose length corresponds to the combined length of the webs.

Abstract: The invention relates to a screen pipe to be used in dry forming of web material in order to distribute fiber material blown into the screen pipe through a jacket (2) of the pipe onto a wire arranged to move under the pipe. The fiber material provided inside the screen pipe is made to move for example by means of a spiked roll placed inside the pipe, so that the movement of the fiber material has both a radial and a tangential component with respect to the jacket (2) of the screen pipe. The jacket comprises on its inner surface profiled grooves (8) in the pipe's axial direction. The edge (8a) of the profiled groove is situated downstream with respect to the tangential component of the fiber flow. The upstream edge (8b) of the groove is positioned downstream with respect to the tangential component of the fiber flow. The bottoms of the profiled grooves comprise holes or slots (9) through which the fibers are discharged from the screen pipe.

Abstract: The invention relates to a screen pipe to be used in dry forming of web material in order to distribute fiber material blown into the screen pipe through a jacket (2) of the pipe onto a wire arranged to move under the pipe. The fiber material provided inside the screen pipe is made to move for example by means of a spiked roll placed inside the pipe, so that the movement of the fiber material has both a radial and a tangential component with respect to the jacket (2) of the screen pipe. The jacket comprises on its inner surface profiled grooves (8) in the pipe's axial direction. The edge (8a) of the profiled groove is situated downstream with respect to the tangential component of the fiber flow. The upstream edge (8b) of the groove is positioned downstream with respect to the tangential component of the fiber flow. The bottoms of the profiled grooves comprise holes or slots (9) through which the fibers are discharged from the screen pipe.

Abstract: The invention relates to a distribution unit to be used in dry forming of web material, the distribution unit comprising one or more screen pipes (1) into which a fiber material (3) intended for forming a web is blown, the fibers penetrating through jackets (2) of the screen pipes in order to be layered onto a wire, and the screen pipe(s) (1) being arranged to extend transversely over the wire; and a rotatable brush roller (4) arranged inside each screen pipe (1) in the axial direction thereof. In the invention, a blade wheel (5) is provided inside each screen pipe (1) near the end that is opposite to the end where the fiber material (3) is blown into the pipe, the blade wheel being arranged to blow in a direction opposite to the direction of flow (A) of the fiber material.