Apparatus and method for treatment of wrapping material

A method for processing a band of wrapping paper, comprising the steps of:

• providing a continuous band of wrapping material,
• guiding the continuous band of wrapping material through a roller gap defined by a roller pair,
• providing the roller pair as part of a plurality of roller pairs in alternating heights with respect to the processing direction of the continuous band of wrapping material,
• wherein the roller pair comprises rollers comprising a male and a female roller, wherein both rollers have flat central roller areas, and
• wherein the female roller has convexly rounded edges, and the male roller has corresponding concavely rounded edges,
• wherein the rollers have matching convex and concave shapes, respectively, such that the rollers provide a continuous weakened region of the continuous band of wrapping material by displacing the region of the continuous band of wrapping material which is passing between a concavo-convex portion of the roller gap relative to the region of the continuous band of wrapping material which is passing between a flat central portion of the roller gap.

An apparatus for processing a continuous band of wrapping material, comprising:

• a roller pair defining a roller gap there between, the roller pair being part of a plurality of roller pairs, which are arranged in alternating orientation along a processing direction of the continuous band of wrapping material, such that lateral areas of the continuous band of wrapping material are alternately bent upwardly and downwardly,
• wherein consecutive roller pairs are positioned at different heights such that the wrapping material is also bent up and down in processing direction of the continuous band of wrapping material,
• wherein the roller pair comprises rollers comprising a male and a female roller,
• wherein the rollers have matching convex and concave shapes, respectively,
• wherein both rollers have flat central roller areas, and
• wherein the female roller has convexly rounded edges, and the male roller has corresponding concavely rounded edges,
• such that the rollers are adapted to provide a continuous weakened region of the continuous band of wrapping material by displacing the region of the continuous band of wrapping material which is passing between a concavo-convex portion of the roller gap relative to the region of the continuous band of wrapping material which is passing between a flat central portion of the roller gap.