Control of oil distribution in heated embossing rolls

Details Control of oil distribution in heated embossing rolls Control of oil distribution in heated embossing rolls

F - Mech Eng,Light,Heat,Weapons

28

F

257/21

F28F 5/00 (2006.01) B31F 1/07 (2006.01) D06C 15/08 (2006.01) D21G 1/02 (2006.01) F16C 13/00 (2006.01) F26B 13/18 (2006.01) F28D 11/02 (2006.01)

Patent

CA 1171077

ABSTRACT OF THE DISCLOSURE A heated roll member especially adapted to provide a uniform temperature surface for embossing or calendering low basis weight cellulose or polymeric webs. The roll member comprises outer and inner shells with an annular chamber therebetween and apertures in the inner shell which introduce fluid into or remove fluid from the annular chamber. Specially constructed apertures, each provided with a flow diverting means, produce fully turbulent flow in a heated fluid moving axially within the annular chamber. A controlled level of turbulence in the fluid is initiated at the aperture and is maintained throughout the annular chamber, such that "hot" or "cold" areas do not develop on the surface of the outer shell.

372519

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