Method and device for coating elements and screen elements made thereby

In a method for coating elements having a multiplicity of openings for sorting, classifying and/or separating goods of the type wherein a bonding agent and thereafter a protective agent is applied at least once onto the surface of the element to be coated and wherein form elements are inserted into the element openings, each opening of which, in cross section, has opposing front edges and opposing rear edges, joined by tapered wall faces, the improvement comprising the steps of:

• providing said form elements with tapered sidewalls, the angle of inclination of each of which is greater than the angle of inclination of the associated opening tapered wall face;
• inserting said form elements into and through said openings of said element from the side opposite to the operating face of the element to be coated, such that they protrude outwardly beyond said operating face and said front edges of said openings and wherein said sidewalls thereof engage in a linearly and sealing manner the front edges of said openings;
• and
• applying said protective agent only onto said operating face of said element in a thickness which is less than the protruding height of said form elements, said linear sealing engagement of said sidewalls of said form elements with said front edges of said openings, preventing said protective agent from seeping into said openings.