Contact roll
AssigneeWindmoller & Holscher
InventorsDavid Finnemore, Alexander Wulfert, Frank Hoffmann
Life of this patent
Estimating the term…
Abstract
The invention describes contact rolls for pressing at least one web of material, preferably a web of plastic film, against at least one rotating winding device, the contact roll comprising a surface layer. At least two segments are provided which are spaced axially apart and which extend around, in which segments the quality of the surface layer differs from the quality of the other areas of the surface layer, at least some portions of said segments being in contact with the edges of the at least one web of material.
Claims12
A winding device for winding at least one web of material onto a respective rotating winding roll, comprised of a contact roll for pressing at least one web of material onto at least one rotating winding roll, said contact roll having a surface layer;
- wherein
- at least two segments are provided which are separated from each other in the axial direction and which extend around in the circumferential direction, in which at least two segments having the characteristics of the surface layer differ from the characteristics in the other regions of the surface layer, wherein at least some portions of said segments are in contact with the edges of the at least one web of material;
- the segments of the surface layer have a greater material hardness than the other regions of the surface layer;
- and
- in the region of the segments, the restoration force of the material is greater that in the other regions, resulting in greater pressure force being applied to the edge of the web material.
A method of winding at least one web of material wherein at least one web of material is pressed against at least two rotating winding rolls by means of a contact roll having a surface layer;
- wherein
- at least two segments which are separated from each other in the axial direction and which extend around in the circumferential direction, in which at least two segments having the characteristics of the surface layer differ from the characteristics in the other regions of the surface layer, are in contact with or are brought into contact with the edges of the at least one web of material;
- the segments of the surface layer have a greater material hardness than the other regions of the surface laver;
- and
- in the region of the segments, the restoration force of the material is greater that in the other regions, resulting in greater pressure force being applied to the edge of the web material.
Dependencies are inferred from the claim text.