EP 0476002 B1 19931215 - CONTINUOUS CONTROLLED DRAINAGE.
Title (en)
CONTINUOUS CONTROLLED DRAINAGE.
Title (de)
KONTINUIERLICH KONTROLLIERTE ENTWÄSSERUNG.
Title (fr)
DRAINAGE REGULE EN CONTINU.
Publication
Application
Priority
US 36292689 A 19890608
Abstract (en)
[origin: WO9015187A1] A process and apparatus for improving paper formation on an open surface paper making machine is described. By the use of both a path for the forming fabric which introduces a controlled level of agitation into the stock, and a low level of vacuum in a suction box extending continuously for the forming section, improvements both in paper quality, such as improved wire mark, and in machine operation, such as an improved first pass retention, are obtained.
IPC 1-7
IPC 8 full level
D21F 1/00 (2006.01); D21F 1/52 (2006.01); D21F 9/02 (2006.01)
CPC (source: EP)
D21F 1/009 (2013.01); D21F 1/523 (2013.01); D21F 9/02 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB IT LI LU NL SE
DOCDB simple family (publication)
WO 9015187 A1 19901213; AU 5725090 A 19910107; AU 633105 B2 19930121; CA 2057932 C 19960116; DE 69005304 D1 19940127; DE 69005304 T2 19940407; EP 0476002 A1 19920325; EP 0476002 B1 19931215; FI 915763 A0 19911205; JP 2581615 B2 19970212
DOCDB simple family (application)
CA 9000185 W 19900607; AU 5725090 A 19900607; CA 2057932 A 19900607; DE 69005304 T 19900607; EP 90908880 A 19900607; FI 915763 A 19911205; JP 50788590 A 19900607