Elastic roll for smoothing paper webs
AssigneeDie Voith Sulzer Papiertechnik Patent GmbH
InventorAlbert Maria Vodermayer
Life of this patent
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Abstract
Roll for smoothing paper webs including a hard roll core and an elastic covering layer provided on an outside of the core. The elastic covering includes an elastic matrix material, and is structured to operate within a temperature range between approximately 25° C. and 150° C. The elastic covering is further structured to operate with a nip frequency of between about 0.3 Hz and 5 Hz, and to be regionally compressible and to operate with a surface compression amplitude of between about 15 μm and 50 μm. The covering is further structured for a total dissipated energy of less than approximately 0.9J/cm3.
Claims25
An apparatus for smoothing a material web, comprising:
- a first roll comprising a hard roll core;
- an elastic covering arranged on said hard roll core;
- a second roll arranged as a counter roll, wherein said first and second rolls are arranged to form a press nip and said elastic cover is regionally compressible in said press nip;
- and
- said elastic covering is structured to dissipate, during operation, a total amount of energy less than about 0.9 J/cm3.
An apparatus for smoothing a material web, comprising:
- a hard roll core;
- an elastic covering layer provided on an outside of said hard roll core, said elastic covering comprising an elastic matrix material and being regionally compressible, and
- for a temperature range between approximately 25° C. and 150° C., a nip frequency between about 0.3 Hz and 5 Hz, and a surface compression amplitude between about 15 μm and 50 μm, said elastic covering is structured for a total dissipation of energy of less than approximately 0.9 J/cm3.
Dependencies are inferred from the claim text.