Patent ID: 6866270

Claim:
In combination with a roll having a stub centered on and rotatable about an axis and a stationary support adjacent the stub, an assembly comprising: a C-section ring fixed on the roll, coaxially surrounding the stub, and having inner and outer axially extending legs defining an axially open cavity, the inner leg being tapered away from the roll, having a free end, and being formed adjacent the free end with a radially outwardly open annular groove; an annular cover part fixed on the support, engaged in the cavity, forming a drain compartment open axially away from the roll, formed with a radially outwardly open catchment groove radially aligned with the free end of the inner leg, and formed with a passage extending from the catchment groove to the drain compartment; an annular extension on the cover part having an outer surface and an inner surface; a seal ring fixed on the extension inner surface and bearing radially inward on the stub; and an add-on part on the extension forming with the extension outer surface, with the cover part, and with the C-section ring a labyrinth.