Method and device for a paper calender

A paper calender comprising:

• at least one first roll;
• at least one elastic cover, said at least one elastic cover comprised of plastic;
• at least one heatable roll, said at least one heatable roll heatable by a heating device, at least one of said at least one heatable roll supporting said at least one elastic cover;
• the elastic cover containing dispersions of dark material, for heating from the outside by means of IR radiation;
• and
• the dispersions of dark material comprising paint pigments.

A paper calender comprising:

• at least one first roll;
• at least one elastic cover, said at least one elastic cover comprised of plastic;
• at least one heatable roll, said at least one heatable roll heatable by a heating device, at least one of said at least one heatable roll supporting said at least one elastic cover;
• and
• the at least one elastic cover containing dispersions of magnetizable material, the at least one elastic cover being heated from the outside by means of an induction coil.

A method for smoothing paper comprising:

• supporting a plastic cover containing dispersions of magnetizable material on a first roll;
• heating the plastic cover of the first roll from the outside by an induction coil;
• pressing a second roll against the first roll forming a nip between the first roll and the second roll;
• and
• passing a paper web through the nip, the paper web being simultaneously heated and smoothed while passing through the nip.

A paper calender comprising:

• at least one first roll;
• at least one elastic cover, said at least one elastic cover being a plastic containing dispersions of paint pigments, for heating from the outside;
• and
• at least one heatable roll, said at least one heatable roll being heatable by an IR heating device, at least one of said at least one heatable roll supporting said at least one elastic cover.

A paper calender comprising:

• at least one hard roll having a coating-free outer surface;
• at least one elastic cover, said at least one elastic cover being a plastic containing dispersions of magnetizable material;
• at least one heatable roll, said at least one heatable roll, at least one of said at least one heatable roll supporting said at least one elastic cover;
• and
• an induction coil that heats said magnetizable material.

A method for smoothing paper comprising:

• providing an elastic cover containing dispersions of dark material, on a first roll;
• heating said elastic cover from the outside by means of IR radiation;
• pressing a second roll against the first roll to form a nip between the first roll and the second roll, said second roll comprising a hard roll having a coating-free outer surface;
• and
• passing a paper web through the nip, the paper web being simultaneously heated and smoothed while passing through the nip.

A method for smoothing paper comprising:

• providing an elastic cover containing dispersions of dark material, on a first roll;
• heating said elastic cover from the outside by means of IR radiation;
• pressing a second roll against the first roll to form a nip between the first roll and the second roll;
• and
• passing a paper web through the nip, the paper web being simultaneously heated and smoothed while passing through the nip;
• wherein said dark material comprises paint pigments.

A paper calender comprising:

• at least one hard roll having a coating-free outer surface;
• at least one elastic cover, said at least one elastic cover being a plastic containing dispersions of magnetizable material, for heating from the outside;
• and
• at least one heatable roll, said heatable roll being heatable by an induction coil, at least one of said at least one heatable roll supporting said at least one elastic cover.