Abstract: The invention relates to a device for use in apparatus for winding continuously-fed material on a winding mandrel for exchanging winding mandrels without interrupting the supply of tape or sheet material to be wound. Two endless cooperating conveyors are provided to which the ends of the winding mandrels are coupled to permit the horizontal transport of an empty winding mandrel received from a store to a winding station and to a removal station after receiving a full roll. The conveyors have sets of parallel, closely spaced bars, the axes of which are arranged perpendicularly with respect to the direction of movement of the conveyors and the ends of the winding mandrels are allowed to move vertically along the gaps between the bars as the diameter of the roll of material changes on the winding mandrel.

Abstract: A stuffing attachment for a continuously operating crinkling unit for continuous material, has a stuffing ring which can be moved forwards and backwards in a straight line with an aperture through which a strip of the continuous material passes. The stuffing ring is pushed through a clamping device into the starting zone of a compression tube of the crinkling unit and thereafter withdrawn. As the stuffing ring is withdrawn, the clamping device closes, so that it grips the strip, holds it fast, and pulls it through the aperture of the stuffing ring as the latter travels further back.