Apparatus for coating a continuously moving strip

An apparatus for coating a liquid on an elongated molding profile having a longitudinally extending front surface and a longitudinally extending back surface, the apparatus comprising:

• a housing forming a generally closed treatment chamber and having a an inlet opening and an outlet opening spaced downstream along a treatment path extending through the chamber from the inlet opening, both openings being of a size and shape slightly larger than the section of the molding;
• means for supplying a mist of the coating liquid to the chamber;
• an upwardly open channel guide extending in the chamber between the openings and formed with an upwardly open groove open longitudinally at each of the openings, the guide being generally complementary to the back surface of the molding;
• transport means for displacing the molding longitudinally through the chamber along the path from the inlet to the outlet opening with its back surface in engagement with the channel guide over the groove, whereby the molding generally upwardly closes the groove to form same into a passage having ends open longitudinally substantially only at the inlet and outlet openings;
• and
• pump means for evacuating the chamber and thereby drawing outside air thereinto through the openings and into the ends of the passage.