SEPARATION UNIT AND A DISPENSER COMPRISING THE SEPARATION UNIT

摘要

The present invention provides a separation unit for separating a web material along preformed lines of weakness. The separation unit has a width direction and comprises a first roller arrangement having a rotational axis extending in the width direction and a web width extending in said width direction, and a second roller arrangement having a rotational axis extending parallel with the rotational axis of the first roller arrangement and a web width extending in said width direction. The second roller arrangement is positioned at a distance from the first roller arrangement, the distance extending in a direction perpendicular to the width direction. Each of the first and the second roller arrangements is provided with a plurality of protrusion elements arranged with a spacing along the rotational axes and protruding perpendicularly from the axes. Each of the protrusion elements has a maximum width in the width direction, a maximum radial extension from the rotational axes, an inner portion adjacent to the rotational axes, and an outer portion remote from the rotational axes. The outer portions of the protrusion elements on the first roller arrangement are arranged in a staggered relationship with the outer portions of the protrusion elements on the second roller arrangement such that the outer portions of the protrusion elements on the first roller arrangement are partially overlapping with the outer portions of the protrusion elements on the second roller arrangement with a radial overlap length, thus forming an undulating passage for a web material between said rollers. Each of the first and second roller arrangements has a central portion and peripheral portions in said width direction. For the first roller arrangement the spacing between the protrusion elements is greater in the central portion than in the peripheral portions.