Patent ID: 6843445

Claim:
A roll stand for continuously unrolling a plurality of rolls of reeled, web-like material, the rolls being unrolled consecutively after each other in the roll stand, and the rolls being arranged to be changed from an almost depleted roll to a new, full roll in the roll stand, wherein the roll stand comprises: a machine stand comprising: a pair of gable sides, each gable side being arranged separate from the other; a hub girder arranged horizontally between the pair of gable sides, wherein the hub girder is rotatably journalled at the gable sides, and wherein the rolls are arranged around the hub girder to be pivoted between an inlet side to which each new, full roll is delivered, and an outlet side from which the web-like material is unrolled; at least two roll holders arranged on opposite sides of the hub girder, wherein the at least two roll holders handle each roll and each roll holder comprises two roll holding arms mounted linearly displaceable in a lateral direction along at least one track, wherein each track is rigidly mounted axially along the hub girder, and wherein each roll holding arm is provided with a gripper to seize a roll; a positioning arrangement to adjust a position of each roll holder laterally along the hub girder and for mutually adjusting each roll holding arm in each roll holder according to a width of the roll currently in the roll holder, wherein the positioning arrangement comprises: a linear guiding unit arranged at each roll holding arm in a displaceable manner along the at least one track, a locking unit to release and firmly lock the roll holding arm at a desired position along the at least one track, and a reference device to indicate a desired position has been reached; and an adjustment device at each roll holding arm that releases the gripper from the depleted roll and seizes the new, full roll while changing rolls, and for a lateral precision adjustment of a position of one roll relative to another roll, and/or for positioning the material web in a desired web direction while unrolling the roll.