Method for wrapping a roll, particularly a paper roll, in an elastic material such as a paper web or plastic film

摘要

PCT No. PCT/FI93/00223 Sec. 371 Date Jan. 28, 1994 Sec. 102(e) Date Jan. 28, 1994 PCT Filed May 25, 1993 PCT Pub. No. WO93/17656 PCT Pub. Date Sep. 16, 1993.A continuous wrapper web is wrapped about a roll that rotates about a rotational axis. The wrapper web is tensioned as it moves toward the roll by means of a brake mechanism disposed intermediate the roll and the source of the wrapper web so as to control tension and feed speed of the wrapper web. An end of the wrapper web is caused to contact the roll such that the wrapper web wraps about the roll in tension as the roll rotates. A portion of the wrapper web is caused to slacken and form a wave in a region intermediate the brake mechanism and the source of the wrapper web such that, in a direction parallel to the rotating roll's rotational axis, the wrapper web assumes tensional equilibrium when approaching and contacting the roll. This procedure reduces wrinkling of the wrapper web as it wraps about the roll due to misalignment between the end of the wrapper web and the rotational axis of the rotating roll.