Patent ID: 8127816

Claim:
Machine for producing a corrugated cardboard web ( 50 ) lined at least on one side, comprising: two fluted rollers ( 2 , 3 ) for producing corrugations ( 44 ) in a paper web ( 43 ), a glue application device ( 13 ) for applying glue ( 49 ) to tips ( 45 ) of the corrugations ( 44 ) of the corrugated paper web ( 43 ), and a pressing device ( 16 ) for pressing a lined web ( 46 ) against the tips ( 45 ) provided with glue ( 49 ) of the corrugated paper web ( 43 ) which lies against one of the fluted rollers ( 3 ) over a pressing region ( 48 ), wherein the pressing device ( 16 ) has an endless pressing belt ( 19 ), which is guided over a deflection roller ( 17 ) and a cylindrical tension roller ( 18 ) and which is pressed against the fluted roller ( 3 ) over the pressing region ( 48 ), and wherein the tension roller ( 18 ) has two axial ends and includes a core ( 32 ) and an outer jacket ( 33 ) surrounding said core, the outer jacket ( 33 ) and the core ( 32 ) having a common longitudinal center and extending to the axial ends of said tension roller, and wherein the core ( 32 ) and the outer jacket ( 33 ) are connected only in the region of their longitudinal center and are separated from one another towards their axial ends by respective annular spaces ( 35 , 35 ′), and wherein said machine further comprises a respective support ( 38 ) in the annular space at each of the axial ends of said tension roller, to delimit a gap ( 41 ) between the support ( 38 ) and the outer jacket ( 33 ) at each of the axial ends of said tension roller, and wherein each support comprises an adjusting ring ( 38 ) configured to limit a deflection of the outer jacket ( 33 ) toward the core ( 32 ), and a holding element maintaining said ring in a fixed axial position with respect to the core while said machine is in operation, and wherein at each of the axial ends of said tension roller, the adjusting ring ( 38 ) has a conical outer surface facing the outer jacket, the outer jacket has a conical inner surface facing said conical outer surface, and the gap ( 41 ) is formed between the conical outer and inner surfaces, and wherein each of the conical outer and inner surfaces extends conically outwardly toward the respective axial end, and wherein the gap is annular when the outer jacket is in an undeflected state so that the support is separated from the outer jacket by an annular space.