Patent attributes
A manually-operated moistener, to which a mail piece is supplied lying flat with a down-turned but not yet adhered flap on the underside of the envelope, has a blade in an upper part and a moistener rocker that can be opened upwardly and can be rotated with at least one locking contour on an associated hinge on the blade so as to be spring-supported as well as locked in a maintenance position. The upper part and a lower part of the moistener are connected by connection elements that can be detached only from above. An antibacterial upper moistening element is disposed in the upper part with a clamping region thereof in a clamping groove of the moistener rocker. A water transfer element protrudes into the lower part, which element is curved at its other, upper end. Both possess a shared contact surface for water transfer that is enlarged by the curvature.