Press roll with extended press shoe having support forces concentrated in piston edges
AssigneeVoith Sulzer Papiermaschinen GmbH
InventorChristian Schiel
Life of this patent
Estimating the term…
Abstract
A press roll for treating a material web in a nip formed with an opposing surface is provided. A press shoe extends along the nip and guides a press jacket. Several adjacent force elements disposed along the direction of the roll axis are supported on a stationary carrier. The force elements are preferably each fluid-actuated cylinder/piston units which can bias the press shoe with their movable pistons. The piston of at least one force element and/or an opposing region of the press shoe concentrate support forces in piston edge regions that are disposed opposite one another on different ends of a central piston plane perpendicular to the roll axis.
Claims31
A press roll for treating a material web having a nip formed with an opposing surface, comprising:
- a press shoe extending along said nip;
- a press jacket guided by said press shoe;
- a plurality of force elements disposed along a longitudinal axis of a stationary carrier;
- one of said press shoe and at least one force element of said plurality of force elements being structured and arranged for concentrating support forces between said at least one force element and said press shoe substantially in edge regions of said at least one force element disposed on opposite sides of a central plane of said at least one force element perpendicular to said longitudinal axis.
The press roll of clam 2, wherein said piston cannot rotate about its axis.
A press roll for treating a material web having a nip formed with an opposing surface, comprising:
- a press shoe extending along said nip;
- a press jacket guided by said press shoe;
- a plurality of pistons disposed along a roll axis of said press roll, which apply pressure to said press shoe to press said press jacket against said opposing surface;
- a plurality of holders which hold said plurality of pistons, respectively;
- at least one of said plurality of pistons being structured and arranged for applying more pressure per unit area in at least one region along the perimeter of said piston than in a central region of said piston.
A press roll for treating a material web having a nip formed with an opposing surface, comprising:
- a press shoe extending along said nip;
- a press jacket guided by said press shoe;
- a plurality of force elements disposed along a longitudinal axis of a stationary carrier;
- one of said press shoe and at least one force element of said plurality of force elements being structured and arranged for concentrating support forces between said at least one force element and said press shoe substantially in a circular edge region of said at least one force element.
Dependencies are inferred from the claim text.