EP 4158098 C0 20240410 - METHOD AND MACHINE FOR PRODUCING A FIBROUS WEB WHICH CAN BE ELONGATED IN THE TRANSVERSE DIRECTION
Title (en)
METHOD AND MACHINE FOR PRODUCING A FIBROUS WEB WHICH CAN BE ELONGATED IN THE TRANSVERSE DIRECTION
Title (de)
VERFAHREN UND MASCHINE ZUR HERSTELLUNG IN QUERRICHTUNG DEHNBAREN FASERSTOFFBAHN
Title (fr)
PROCÉDÉ ET MACHINE POUR PRODUIRE UNE BANDE FIBREUSE POUVANT ÊTRE ALLONGÉE DANS LA DIRECTION TRANSVERSALE
Publication
Application
Priority
- DE 102020114602 A 20200602
- EP 2021053810 W 20210217
Abstract (en)
[origin: WO2021244780A1] The invention relates to a method for producing a fibrous web which can be elongated in the transverse direction, in particular a paper or cardboard web which can be elongated in the transverse direction. The fibrous web exiting a pre-drying section of the production machine in question is brought into contact with a heated rotating cylinder which is smooth and impermeable to steam, and the fibrous web is guided over the heated cylinder together with a circulating elastic belt which is impermeable to steam over a specified or specifiable angle of wrap so as to lie between the elastic belt and the heated cylinder and is pushed against the cylinder by the elastic belt. Prior to being brought into contact with the fibrous web, the elastic belt is supplied with a variably adjustable and/or controllable pretension in the transverse direction. The elastic belt pretension generated in the transverse direction is relieved after forming a steam cushion between the fibrous web and the heated cylinder so that the fibrous web is shrunk together with the elastic belt in the transverse direction in a sliding manner over the steam cushion on the heated cylinder. The invention also relates to a machine for carrying out the method.
IPC 8 full level
D21F 5/02 (2006.01); D21F 11/14 (2006.01)
CPC (source: EP US)
D21F 5/02 (2013.01 - EP); D21F 11/14 (2013.01 - EP); D21H 25/005 (2013.01 - US); D21H 25/04 (2013.01 - US)
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Participating member state (EPC – UP)
AT BE BG DE DK EE FI FR IT LT LU LV MT NL PT SE SI
DOCDB simple family (publication)
DE 102020114602 A1 20211202; CN 115698424 A 20230203; EP 4158098 A1 20230405; EP 4158098 B1 20240410; EP 4158098 C0 20240410; US 2023103146 A1 20230330; WO 2021244780 A1 20211209
DOCDB simple family (application)
DE 102020114602 A 20200602; CN 202180039696 A 20210217; EP 2021053810 W 20210217; EP 21706541 A 20210217; US 202218073684 A 20221202