Device used to indirectly apply a liquid or viscous medium onto a material web, specifically a paper or cardboard web

An apparatus for indirectly applying a coating medium onto a traveling fiber material web having a direction of travel, said apparatus comprising:

• a first transfer element having a surface, said first transfer element being configured for contacting the fiber web and transferring one layer of the coating medium onto the web;
• an applicator unit configured for applying the one layer of the coating medium onto said surface of said first transfer element,
• a first leveling unit disposed after said first transfer element relative to the direction of travel of the fiber web, said first leveling unit including a rigidly mounted first leveling element extending in a cross direction substantially orthogonal to the direction of travel of the fiber web, said first leveling element being a first doctor blade configured for contacting the fiber web and smoothing the one layer of the coating medium on the fiber web;
• a first moistening device disposed prior to said first leveling element relative to the direction of travel of the fiber web and configured for moistening said first leveling element, said moistening device comprising a spray device configured for spraying said first leveling element with steam;
• a second transfer element opposing said first transfer element, said second transfer element being configured for being disposed on a side of the fiber web opposite said first transfer element, said second transfer element also being configured for indirectly applying the coating medium;
• a second leveling unit disposed after said second transfer element relative to the direction of travel of the fiber web, said second leveling element includes a second leveling element configured for supporting said first leveling element, said second leveling element being a second doctor blade positioned so as to opposed said first doctor blade;
• and
• a second moistening device disposed prior to said second leveling unit relative to the direction of travel of the fiber web and configured for moistening said second leveling element, said moistening device comprising a spray device configured for spraying said second leveling element with steam.