Device for producing paper webs coated on both sides

Apparatus for coating a web which has been dried in a paper making machine, the apparatus comprising;

• means for guiding a paper web along a path;
• a first coating station located at and being for indirectly coating one side of the paper web and a second coating station located at and being for indirectly coating the other side of the paper web, the second coating station being disposed downstream of the first coating station along the path of the web;
• each of the first and second coating stations comprising:
• a rotatable application role having a peripheral surface for receiving a coating mass and for rotating into contact with the respective side of the web for applying coating on the respective side of the web;
• an opposing element opposing the respective application roll for defining a respective application nip through which the web passes and in which the application roll applies the coating mass to the respective side of the web;
• and
• a smooth doctor element at the application roll spaced around the roll away from the nip, and the doctor element being smooth for metering the coating film on the surface of the respective application roll;
• the apparatus further comprising respective first and second drying means downstream of the first and second coating stations, for drying the material coated on the web, the first drying station being between the first and second coating stations along the path of the web;
• a calendering unit downstream in the path of the web from the second drying means of the second coating station.