Abstract: A method for identification of a roll and for determining its diameter, in which a device for reading the identifier and the sensor for measuring the diameter are mounted to a unit moving on a vertical lead, and its position is tracked by a position sensor. The diameter of the roll is detected by a mechanical detector that turns up when it contacts the surface of the roll enabling thus an uninterrupted movement of the unit past the measurement site. After the measurement of the diameter the identification unit moves to the center of the roll, inferred from the diameter, where the device for reading the identifier reads the identification code of the roll. During the return movement of the identification unit, markings can be made on the end of the roll by an ink-jet printer.

Abstract: An assembly and method for the guided threading of a wrapper for the wrapping of cylindrical objects, including a two-part frame (2, 3), a belt-like element (8, 9) for guiding the wrapper, and elements (4, 5, 6 and 7, 10, 11) attached to the frame, suitable for transferring the belt-like element (8, 9) to rest against the roll (1). The wrapper is guided by means of a roller chain (8, 9) comprised of a plurality of freely rotating rollers (17) which are linked to each other. The assembly incorporates two pairs of support arms placed to function in opposing directions with respect to rotating direction of the roll (1), the arm pairs comprising a lower support arm (5, 7) and an upper elongated support arm (4, 6), both pivotally mounted to the frame (2, 3), crank levers (10) attached to the pivotally mounted end of each support arm, and pneumatic cylinders (11) connected to each crank lever (10), capable of rotating the support arms (4, 5, 6 and 7) via the crank levers (10).