A device for winding and unwinding a web of material and including two separated uprights, in each of which is mounted a horizontal chuck onto which the core tube can be introduced. To prevent the core tube from corrugating or tearing, there is a mechanism (15-17) that supports the reel (8) at the bottom during winding and unwinding and that can move along with the reel.
A roll chucking apparatus is disclosed. The roll defines opposed side openings. The roll chucking apparatus includes a platform from supporting the roll. Lift structures vertically adjust the platform. Sensing structures sense an increase or decrease in the platform load upon the attempted initial insertion of opposed chucking pins into the opposed side openings. The lift structures vertically moves the platform and the roll until correct vertical alignment with the chucking pins occurs.
An unwinding device for a machine for the processing of strip material has a pair of arms which receive the roll between them and are movable toward and away from one another by a spindle having threaded portions of opposite hand engaging the respective arms. A bearing sleeve axially entraining the spindle is engaged between the fork shanks which are connected to a piston rod of a double acting cylinder mounted on the traverse along which the arms are guided to adjust the arms in axial direction transverse to the web feed direction.
An assemblage for aligning a roll to a chucking device has at least two flexibly movable, spaced roll support members arranged planarily for supporting the roll for alignment with a fixed positioned chucking device. Each roll support member has a compression head biased for movement by a plurality of cooperating spring members. Precise alignment of the core with the chucking device results from the force imparted to the flexibly movable support member bearing the roll by the chucking device engaging the core.
