Wet end for e.g. paperboard web, has shoe pressing device located upstream of couching press roll and backing roll, where press roll forming press nip is felted in web running direction

摘要

#CMT# #/CMT# The wet end (2) has a pressing unit (4) provided with a shoe pressing device (7) that is located upstream of a couching press roll (8) and a backing roll (10). The press roll forming a press nip (11) is felted in a fibrous material web running direction. A forming unit (3) is provided with the pressing unit, and a couching press device (5) is arranged in the forming unit. The backing roll is partly formed by a wire belt (14) of the forming unit. The backing roll of the couching press device is formed by suction rolls (13, 17). #CMT#USE : #/CMT# Wet end for a fibrous material web e.g. paper, paperboard web and fraction of waste paper, manufacturing machine (all claimed). Can also be used for a packaging paper, a specialty paper and a graphic paper. #CMT#ADVANTAGE : #/CMT# The pressing unit is provided with the shoe pressing device that is located up-stream of the couching press roll and the backing roll, where the press roll forming the press nip is felted in the fibrous material web running direction, thus prolonging service life of felt tapes and humidity profiles with packaging papers, ensuring high production of the packaging paper, specialty paper and the graphic paper and achieving high basis weight and/or high load of press felts i.e. high dirt cargoes. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a schematic view of a wet end for fibrous material web manufacturing machine. 2 : Wet end 3 : Forming unit 4 : Pressing unit 5 : Couching press device 7 : Shoe pressing device 8 : Couching press roll 10 : Backing roll 11 : Press nip 13, 17 : Suction rolls 14 : Wire belt.