Closed Loop Consistency Control on the Fourdrinier Improves Runnability and Sheet Quality, 1992 Nonwovens Conference Proceedings
The consistency of the stock on the fourdrinier increases as it progresses from the headbox to the couch. It is a well known fact that paper properties can be effected by consistency variations. This is particularly apparent on machines with top wires, mini-fourdriniers and dandy rolls. A mass gauge has been used to provide a continuous measurement at critical locations on the forming section. This allows for manual or closed loop control of consistency at the point of measurement. Sheet quality and improved machine efficiency have resulted from this approach on most grades of paper and on many different types of fourdriniers.
Closed Loop Consistency Control on the Fourdrinier Improves Runnability and Sheet Quality, 1992 Nonw