Steam shower for adjusting paper moisture profile
US4249992A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 1978 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Nov 29, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S162/06
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A steam shower for reducing paper web moisture content variability in the cross machine direction is described. The local dewatering effect of the shower on the moving supported web is controlled by varying its bottom steam discharge area incrementally across the width of the web. In one embodiment the hood is divided across the width of the machine into compartments, each having at least one cross machine direction wall whose bottom edge may be adjusted relative to the rear wall of the hood. A second embodiment has a pleated curtain whose bottom edge is controlled by lever arms with respect to the hood's rear wall. Local adjustments are made based on a comparison of moisture measurements at the finished product reel with the desired level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.