Global Patent Index - EP 0968329 A1

EP 0968329 A1 2000-01-05 - METHOD IN THE PRODUCTION OF A WEB MATERIAL

Title (en)

METHOD IN THE PRODUCTION OF A WEB MATERIAL

Title (de)

VERFAHREN ZUR HERSTELLUNG EINER MATERIALBAHN

Title (fr)

PROCEDE DE PRODUCTION D'UN MATERIAU EN BANDE

Publication

EP 0968329 A1 (EN)

Application

EP 97921016 A

Priority

SE 9700466 W

Abstract (en)

[origin: US2002050328A1] Method for improving the formation of a web material in a wire machine, including dispersing existing flocks in stock which is transported along a transport direction from an inlet box onto a plurality of wire sections which are arranged after each other along the direction of travel, counteracting the reformation of flocks in the stock on the wire by furnishing ultrasound energy as ultrasound waves with frequencies between 15 and 75 kHz to the stock on the wire sections. The ultrasound has a higher frequency within at least one section which is closer to the inlet box than a subsequent section further away from the inlet box, within which subsequent section the ultrasound has as lower frequency.

IPC 1-7 (main, further and additional classification)

D21F 1/00

IPC 8 full level (invention and additional information)

D21F 1/00 (2006.01); D21F 1/18 (2006.01)

CPC (invention and additional information)

D21F 1/18 (2013.01); D21F 9/003 (2013.01)

Citation (search report)

See references of WO 9841683A1

Designated contracting state (EPC)

AT BE DE DK ES FI FR GB IT NL PT SE

DOCDB simple family

US 2002050328 A1 20020502; AT 352661 T 20070215; DE 69737300 D1 20070315; DE 69737300 T2 20070830; DE 69737300 T3 20121025; EP 0968329 A1 20000105; EP 0968329 B1 20070124; EP 0968329 B2 20120404; PT 968329 E 20070430