Applicator for direct or indirect application of a liquid or pasty coating medium onto a traveling material web

An applicator for direct application of a coating medium onto a traveling fiber material web, said machine comprising:

• at least one dosing apparatus including a pair of lips, each of said lips having a free end adjacent the fiber material web and extending transverse to a direction of travel of the fiber material web, said lips defining a dosing slot therebetween, said dosing slot being configured as an open-jet nozzle and having two side edges;
• a coating edge delimiting apparatus including at least two coating edge delimiting elements fitted between and in direct contact with each of said lips, said coating edge delimiting elements closing off and substantially sealing said dosing slot on said side edges, thereby substantially sealing said dosing slot, each of said coating edge delimiting elements having a wall section extending beyond said free ends of said lips in a flow direction of the coating medium through said dosing slot;
• and
• an aperture board having a plurality of through slots, at least one of said coating edge delimiting elements having a recess therein, at least a portion of said aperture board being received by said recess.

An apparatus for one of direct and indirect application of a coating medium onto a traveling fiber material web, said apparatus comprising:

• a traveling substrate, said traveling substrate being one of said traveling fiber material web and a roll, said roll being configured for transferring said coating medium onto said traveling fiber material web;
• and
• an applicator for one of direct and indirect application of a coating medium onto said traveling substrate, said applicator further comprising:
• at least one dosing apparatus including a pair of lips, each of said lips having a free end adjacent said traveling substrate and extending transverse to a direction of travel of said traveling substrate, said lips defining a dosing slot therebetween, said dosing slot being configured as an open-jet nozzle and having two side edges;
• and
• a coating edge delimiting apparatus including at least two coating edge delimiting elements fitted between and in direct contact with each of said lips, said coating edge delimiting elements closing off and substantially sealing said dosing slot on said side edges, thereby substantially sealing said dosing slot, each of said coating edge delimiting elements having a wall section extending beyond said free ends of said lips in a flow direction of the coating medium through said dosing slot, said wall section having a concave curvature, said concave curvature facing in a direction of travel of the traveling substrate.