Mini-Encyclopedia of Papermaking Wet-End Chemistry
Part Three: Equipment & Unit Operations


The most traditional paper-forming equipment is the single-forming-fabric Fourdrinier paper machine. On a Fourdrinier machine a wide jet of dilute furnish is applied from a headbox onto the surface of a continuously moving wire screen. Water is removed by gravity and with the help of hydrofoils (or alternatively, table-rolls), vacuum boxes, and vacuum applied at the couch roll. A dandy roll (screen cylinder) or a top-wire may be used to make the sheet more uniform. The name Fourdrinier has been passed down from the English entrepreneurs who first commercialized the continuous forming machine invented by Louis Robert.

Request from the webmaster: Our goals include brevity and accuracy. Hopefully we have succeeded with the first goal without sacrificing the second. Please let us know right away if you find an error or omission. Also, please indicate points that need a clearer description.


Home page Research opportunities Business opportunities Background information Links to wet-end chemistry E-Mail
This page is maintained by Martin hubbe, Associate Professor of Wood and Paper Science, NC State University, .