The gravure applicator wheel is the most important individual component on an edge — bander. Adhesive transfer to the substrate takes place when the substrate comes into contact with the gravure wheel applicator, which should rotate at the same speed as the moving track. Fresh adhesive is resupplied to the applicator wheel via the doctor blade in less than one revolution of the wheel.
By adding another doctor blade and reversing the direction of the rotation of the gravure applicator wheel, much more adhesive can be driven onto the substrate. This may be necessary when edging substrates with a low density, wide edges, or edges that require a lot of gap filling (plywood). Worn gravure applicator wheels should be replaced immediately. On replacement, a change in machine performance will take place and equipment adjustments should be carried out.