Patent ID: 6554900
Filing Date: 2003-04-29
Classification: B05C

Abstract:
An apparatus for applying a flowable medium (2, 2â€²) to a continuously transported web (1) which lies on a counterroll (5) in a region where the medium (2, 2â€²) is applied, comprising the following:a) a continuously rotating engraved roll (4) adapted for applying medium (2, 2â€²) to web (1), b) the engraved roll (4) has on its circumferential surface (6) a plurality of engraved grooves (19), c) an application head (3) adapted for applying medium (2, 2â€²) to the circumferential surface (6) of the engraved roll (4), d) the application head (3) is arranged below the engraved roll (4), and the engraved roll (4) is arranged below the counter roll (5), e) the application head (3) has a pre-chamber (7) and a main chamber (8), open toward the circumferential surface (6) of the engraved roll (4), for the medium (2, 2â€²) to be applied, f) the pre-chamber (7) and main chamber (8) are separated from one another by a center sealing member (10), with the sealing member (10) lying on the circumferential surface (6) of the engraved roll (4), g) the pre-chamber (7) is bounded on its exposed exterior side by a front doctor blade (13), which lies to form a seal on the circumferential surface (6) of the engraved roll (4) and the main chamber (8) is limited on its exposed exterior side by a back doctor blade (17) which also lies to form a seal on the circumferential surface (6) of the engraved roll (4), and h) pre-chamber (7) and main chamber (8) are adapted such that the pressure of the medium (2) in the pre-chamber (7) is greater than the pressure of the medium (2â€²) in the main chamber (8).