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US 7,017,479 B2Granted
Calender
AssigneeMetso Paper, Inc.
InventorHarri Kuosa
Life of this patent
Estimating the term…
Abstract
A soft calender has a body structure (10) and at least two roller sets (11; 12). There is at least one calendering nip (N1, N2, N3, N4) formed in between two rollers (13, 14; 14, 15; 16, 17; 17, 18). Of the rollers forming the nip, at least one is a roller with a soft surface (13, 15; 16, 18) and the other is a heating roller (14, 17). The calender body structure (10) is formed with a stepped shape in such a way that the roller sets (11, 12) can be located in an upper and a lower place of location (21) on the same side of the body.
Claims21
A calender comprising:
- a body structure having a side, and portions forming a lower step recessed into the side of the body structure, the lower step having a recess ceiling, a side wall, and a floor plane, the lower step forming a lower place of location;
- a first roller with a soft surface mounted in the lower step;
- a first heated roller mounted within the lower step to define a first nip with the first roller with a soft surface;
- an upper step formed of portions of the body structure, the upper step being positioned above the lower step and recessed into the side of the body structure, the upper step having a recess ceiling, a side wall, and a floor plane, the upper step forming an upper place of location;
- a second roller with a soft surface mounted in the upper step;
- and
- a second heated roller mounted within the upper step to define a second nip with the second roller with a soft surface.
4 more elements
A calender having a body structure on which rolls are mounted comprising:
- the body structure having a side, the side of the body structure having a stepped shape formed by portions of the body structure forming a lower step recessed into the side of the body structure, the lower step having a recess ceiling, a side wall, and a floor plane, and portions of the body structure forming an upper step positioned above the lower step, the upper step recessed into said side of the body structure, the upper step having a recess ceiling, a side wall, and a floor plane wherein the upper step is set further back into the the side of the body structure than the lower step;
- the lower step forming a lower place of location in which is mounted a first roller with a soft surface and a first heated roller forming a first roll set and a first nip;
- and
- the upper step forming an upper place of location in which is mounted a second roller with a soft surface and a second heated roller forming a second roll and a second nip.
1 more element
Dependencies are inferred from the claim text.