Global Patent Index - EP 0924337 A3

EP 0924337 A3 2000-04-26 - Press roll

Title (en)

Press roll

Title (de)

Presswalze

Title (fr)

Rouleau de presse

Publication

EP 0924337 A3 (DE)

Application

EP 98122860 A

Priority

DE 19756226 A

Abstract (en)

[origin: EP0924337A2] The press roller, for a paper making machine, has a cylindrical metal body (12) with an outer cladding (14) of at least one layer (16,18). At least the radially outermost layer (16) of the roller cladding (14) has a continuously changing construction in the radial direction (R) and over its thickness (d), in terms of its chemical composition and/or structure. The roller cladding (14) is applied at least partially by spraying. The bottom layer (18) of the cladding (14) is directly against the metal core (12), to prevent corrosion, to lie between the metal roller body (12) and the outer layer (16). The outermost layer (16) of the roller cladding (14) contains at least an oxide, and especially of Al2O3, Cr2O3, ZrO2, TiO2, SiO2 and/or the like. It contains at least one carbide and especially WC, CrC and/or the like, and at least one nitride and especially TiN and/or the like, and/or at least one boride and especially TiB2 and/or the like, or a mixture of two or more of these components. The radially outermost layer (16) can be a ceramic/metal material with at least one oxide of Al2O3, Cr2O3, ZrO2, TiO2, SiO2 and/or the like. The outer layer (16) contains a plastics component and especially polytetrafluoroethylene, silicon and/or the like. The inner layer (18) also has a continually changing construction over at least part of its thickness, in terms of its chemical composition and/or structure, with a continuous construction change through the whole thickness of the total roller cladding (14).

IPC 1-7 (main, further and additional classification)

D21F 3/08

IPC 8 full level (invention and additional information)

D21F 3/08 (2006.01)

CPC (invention and additional information)

D21F 3/08 (2013.01)

Citation (search report)

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family

EP 0924337 A2 19990623; EP 0924337 A3 20000426; EP 0924337 B1 20040623; AT 269916 T 20040715; DE 19756226 A1 19990624