Patent ID: 6872257

Claim:
Pressure chamber scraper for application of a liquid medium onto a rotating drum, said pressure chamber scraper having an axially extending scraper head ( 12 ), together with an axially extending dosing scraper ( 13 ) touching the mantle surface of the drum and with a sealing scraper ( 14 ) it forms a chamber in the circumferential direction, in said chamber there is an axially extending displacement element ( 15 ) to form a pressure compartment ( 16 ) and an outlet compartment ( 17 ) and leaving an application gap ( 18 ) to the mantle surface of the drum, and the medium for wetting of the mantle surface flows through said gap, wherein the medium is supplied through an inlet opening ( 21 ), located between the displacement element ( 15 ) and the scraper head ( 12 ), and into the pressure compartment ( 16 ), characterized in that the displacement element ( 15 ) and scraper head ( 12 ) have mutually facing contact surfaces ( 19 , 20 ) which bound at least one gap ( 22 ) that is formed between the displacement element ( 15 ) and the scraper head ( 12 ), the at least one gap ( 22 ) opens into the pressure compartment ( 16 ) and provides the only path for the medium to flow directly from the inlet opening ( 21 ) into the pressure compartment ( 16 ).