Calender for material webs and method for calendering material webs
AssigneeVoith Sulzer Papiertechnik Patent GmbH
InventorRalf Beckers
Life of this patent
Estimating the term…
Abstract
Calender for a material web, and a method for calendaring the material web. The calender includes a frame upon which at least one roll stack is mounted. The roll stack includes a plurality of rolls, in which the end rolls are designed as sag compensation rolls. An intermediate roll adjacent to one sag compensation roll is fixedly mounted to the frame. An adjusting device adjusts the sag compensation roll to control a compressive stress in a first nip, in such a manner that the compressive stress in the first nip is adjusted independently of a compressive stress in a following nip.
Claims29
Calender for use with a material web, comprising:
- a frame;
- at least two roll stacks, each roll stack of said at least two roll stacks having a plurality of rolls, end rolls of said plurality of rolls forming sag compensation rolls with a jacket, said sag compensation rolls being supported on a bracket non-rotatably secured to said frame, an intermediate roll being positioned adjacent one of said sag compensation rolls, said intermediate roll being fixedly mounted to said frame;
- and
- an adjusting device that adjusts a sag compensation roll in order to adjust a compressive stress in a first nip, said compressive stress in said first nip being independently adjusted from a compressive stress adjustment of a second nip.
A calender for use with a material web, said calender having at least one roll stack with at least four rolls, in which end rolls of the at least one roll stack are designed as sag compensation rolls with a jacket non-rotatably supported on a bracket, said calender comprising:
- an intermediate roll that is positioned proximate an upper sag compensation roll;
- and
- an adjusting device that adjusts a compressive stress in an upper nip independently of a compressive stress in a remaining nip.
A calender for use with a material web, comprising:
- a roll stack, comprising:
- an upper roll;
- a lower roll;
- and
- at least one intermediate roll, an upper nip being formed between said upper roll and said intermediate roll, and a second nip being formed between said lower roll and said intermediate roll;
- and
- an adjusting device that adjusts a compressive stress in said first nip independently from a compressive stress adjustment of said second nip.
A calender for use with a material web, comprising:
- an upper roll stack, comprising:
- an upper roll;
- a lower roll;
- and
- a plurality of intermediate rolls, a first upper nip being formed between said upper roll of said upper roll stack and one intermediate roll of said plurality of intermediate rolls of said upper roll stack, remaining nips being formed between said plurality of intermediate rolls and between one intermediate roll and said lower roll of said upper roll stack;
- a lower roll stack, comprising:
- an upper roll;
- a lower roll;
- and
- a plurality of intermediate rolls, a second upper nip being formed between said upper roll of said lower roll stack and one intermediate roll of said plurality of intermediate rolls of said lower roll stack, remaining nips being formed between said plurality of intermediate rolls and between an intermediate roll and said lower roll of said lower roll stack;
- and
- an adjusting device that adjusts a magnitude of a load in at least one of said first upper nip and said second upper nip independently of a magnitude of another load in said remaining nips of said at least one of said upper roll stack and said lower roll stack.
A method for processing a material web, comprising:
- passing the material web through a first roll stack having an upper roll, a lower roll and at least one intermediate roll that are arranged to form an upper nip between the upper roll and the intermediate roll and a remaining nip between the lower roll and the intermediate roll;
- and
- adjusting a compressive stress in the first nip independently from a compressive stress adjustment of the remaining nip.
Dependencies are inferred from the claim text.