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US 6,405,790 B1Granted
Roll
AssigneeVoith Sulzer Finishing GmbH
InventorRolf van Haag
Life of this patent
Estimating the term…
Abstract
Soft roll that may include a roll tube having an outside surface and a sealed interior space, and an elastic coating provided on the outside surface. The sealed interior space may include a vaporizable liquid and a heat exchanger for cooling heat generated in the roll during use. The sealed interior space may be gas-tight and the temperature of the heat exchanger may be set to condense vaporized liquid.
Claims32
A roll comprising:
- a roll tube having an outside surface and a sealed interior space;
- an elastic coating provided on the outside surface;
- a vaporizable liquid and a heat exchanger being positioned within the sealed interior space;
- the heat exchanger comprising a coolant supplied to the heat exchanger from outside the roll tube;
- and
- a rotary feeding associated with at least one journal to supply the coolant.
3 more elements
A calender roll comprising:
- a roll tube including a gas-tight section;
- an elastic coating on a surface of the roll tube;
- and
- the gas-tight section comprising a vaporizable liquid and a heat exchanger.
1 more element
A roll comprising:
- a roll tube having an outside surface and a sealed interior space;
- an elastic coating provided on the outside surface;
- and
- a vaporizable liquid and a heat exchanger being positioned within the sealed interior space.
1 more element
A method for cooling a roll having an elastic coating in use in a calender, the method comprising:
- forming a vaporizable liquid film on an interior surface of the roll;
- vaporizing the vaporizable liquid film to produce vaporized liquid;
- condensing the vaporized liquid to produce a condensed liquid;
- forcing the condensed liquid onto the interior surface of the roll;
- forming a nip between the roll and a counter roll;
- applying pressure in the nip;
- and
- calendering a web of material in the nip.
5 more elements
A calender comprising:
- a first and a second calender roll arranged to form a calendering nip;
- and
- at least one of said first and said second calender roll comprising:
- a roll tube having an elastic coating;
- a sealed interior space;
- and
- a vaporizable liquid and a heat exchanger positioned within said sealed interior space.
4 more elements
Dependencies are inferred from the claim text.