Control of oil distribution in heated embossing rolls
US4252184A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1980 |
| Grant date | Feb 24, 1981 |
| Priority date | — |
| Expiry date | Mar 10, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S165/919
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.