Paper machine with closed loop control system
US6290816A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 21, 1999 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | Jul 21, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S162/10
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A paper machine for making a fiber web includes an approach flow system with a plurality of control modules. Each control module controls one of a plurality of adjustable input parameters. A wet end receives a fiber suspension from the approach flow system, and includes a headbox which discharges a fiber suspension with a known cross sectional profile onto a wire. A press section, forming section and drying section are used to press form and dry the fiber web, respectively. A plurality of sensors are respectively positioned in association with the approach flow system, wet end, press section, forming section and/or drying section. Each sensor is configured to sense a physical characteristic of the fiber suspension or fiber web and provide an output signal indicative thereof. A chemistry process controller is coupled with each sensor and each control module within the approach flow system to define a closed loop control system. The chemistry process controller controls operation of each control module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.