Press roller for a web of paper or cardboard or tissue, to extract water and/or polish the surface, has a press shoe with a concave press surface and a decoupling zone to reduce the effects of heat on the press pressure profile

摘要

The press roller at a papermaking or finishing machine, to extract water from and/or polish a web (1) of paper or cardboard or tissue, has a flexible roller mantle (3) and a press shoe (8) with a concave press surface with a metal or ceramic coating (6), to form an extended press gap together with a counter roller (4). The press roller at a papermaking or finishing machine, to extract water from and/or polish a web (1) of paper or cardboard or tissue, has a flexible roller mantle (3) and a press shoe (8) with a concave press surface with a metal or ceramic coating (6), to form an extended press gap together with a counter roller (4). The effects of heat on the press shoe are reduced through at least one decoupling zone (7) through the press shoe in the press direction (11) and at right angles to the direction (5) of web travel, with a lower elasticity module than in the neighboring zones (9',9").