machine à papier à table plate

Traductions

• anglais

  Date : 1982

  Définition

  The best-known and most widely used papermaking machine; it was the first straight-line continuous production assembly for any major industrial material.
  
  Name of the modern paper machine, derived from the Fourdrinier brothers, who financed the development of the machine invented by Nicolas Louis Robert at the beginning of the 19th century; it consists of a moving and endless web of wire cloth on which the sheet of paper is formed from the pulp suspension.

  Notes :

  Fourdrinier, name applied to the standard type of paper-machine.
  
  It was patented in England in 1807 by two brothers of that name and was first operated in the U.S. in 1827. A typical fourdrinier is about 150 feet long and 6 feet wide, delivering finishing sheet (web) up to 72 inches wide at high speed. Its essential components are: (1) the head box containing the "furnish", a dilute suspension of pulp in water; (2) the moving "wire" or metal screen onto which the furnish is flowed uniformly from the head box and on which the sheet is formed within seconds by filtration; (3) a series of pressure and suction rollers which remove additional water, the semi-dried web being carried on felt pads as it moves through the systems; (4) the drying section, comprised of a double bank of rotating steamheated drums over which the sheet passes; and (5) a four- or five-roll calender which irons and polishes the sheet. The entire process reduces the water content of the product from about 95% to 5%. Continuous operation at high speed for weeks at a time is possible with web thicknesses ranging from tissue to moderately heavy paperboard.

  Terme :

  1. Fourdrinier paper machine

  Termes associés :

  1. Fourdrinier machine
  2. multi-fourdrinier machine