Louvered steam box for controlling moisture profile of a fibrous web
US4545857A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 16, 1984 |
| Grant date | Oct 8, 1985 |
| Priority date | — |
| Expiry date | Jan 16, 2004 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD21F7/008
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A steam box or hood for controlling the moisture profile of a fibrous web such as paper during forming and pressing is described. The steam hood includes a plenum filled with nonturbulent, substantially atmospheric pressure steam which delivers the steam into a series of side-by-side compartments which extend across the width of and adjacent to the web. Each compartment includes a damper, the position of which is individually controllable through a rod adjustment from the operating side of the machine. The position of the damper determines the amount of steam applied to the web from a compartment and hence the moisture content of the web adjacent to the particular compartment being adjusted. Each compartment is adjusted to achieve a desired uniform moisture content across the width of the web.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.