Multi-layer web formation section

Details Multi-layer web formation section Multi-layer web formation section

2005-02-11

2009-10-27

Fortuna, José A (Department: 1791)

Paper making and fiber liberation

Processes and products

Multi-layer waterlaid webs or sheets

C162S133000, C162S217000

Reexamination Certificate

active

07608165

ABSTRACT:
A multi-layer web formation section has at least two successive wire units (300, 310). First and second headboxes (100, 110) supply pulp suspension jets to the forward end of the first wire unit (300) and the second wire unit respectively to form a first partial web (W1) and a second partial web (W2) which are joined at a joint (N1) between the second wire unit (310) and a bottom wire (11). A first non-pulsating dewatering zone (Z1b) in the forward end of a two-wire stretch of the second wire unit (310) is formed by a fixed formation shoe (200b) having a curved cap (201) placed against one side, having openings with an under-pressure applied. A two-wire stretch of the second wire unit (310) has a second pulsating dewatering zone (Z2b), formed by fixed dewatering lists (210b) in the cross machine direction with gaps (220b) therebetween with an under-pressure (Pb) applied.

REFERENCES:
patent: 3625814 (1971-12-01), De Noyer
patent: 3856618 (1974-12-01), Roell
patent: 3891501 (1975-06-01), Oka et al.
patent: 3985612 (1976-10-01), Watanabe
patent: 4154645 (1979-05-01), Kankaanpaa
patent: 4425187 (1984-01-01), Armstrong et al.
patent: 4614566 (1986-09-01), Koponen et al.
patent: 4830709 (1989-05-01), Turner et al.
patent: 4917766 (1990-04-01), Koivuranta et al.
patent: 5259929 (1993-11-01), Bubik et al.
patent: 5468348 (1995-11-01), Blackledge et al.
patent: 5607555 (1997-03-01), Grossmann et al.
patent: 5914009 (1999-06-01), Kotitschke
patent: 5972168 (1999-10-01), Egelhof et al.
patent: 6342125 (2002-01-01), Nordstrom
patent: 6375799 (2002-04-01), Halmschlager et al.
patent: 6464835 (2002-10-01), Raisanen et al.
patent: 6616811 (2003-09-01), Wassermann et al.
patent: 6942760 (2005-09-01), Heikkila et al.
patent: 7300553 (2007-11-01), Poikolainen et al.
patent: 7364643 (2008-04-01), Poikolainen et al.
patent: 2001/0025697 (2001-10-01), Wildfong et al.
patent: 2003/0000666 (2003-01-01), Mansson et al.
patent: 2005/0241792 (2005-11-01), Poikolainen et al.
patent: 2006/0162890 (2006-07-01), Poikolainen et al.
patent: 2007/0158042 (2007-07-01), Raisanen et al.
patent: 2007/0163736 (2007-07-01), Raisanen et al.
patent: 2007/0235153 (2007-10-01), Poikolainen et al.
patent: 2008/0115902 (2008-05-01), Poikolainen et al.
patent: 2818118 (1978-11-01), None
patent: 0289445 (1988-11-01), None
patent: 2041030 (1980-09-01), None
patent: WO 02/070817 (2002-09-01), None
patent: WO 2004018768 (2004-03-01), None
patent: WO 2005078187 (2005-08-01), None
patent: WO 2005078188 (2005-08-01), None
patent: WO 2007096467 (2007-08-01), None
patent: WO 2008000900 (2008-01-01), None

Affiliated with

Also associated with

Rating

Multi-layer web formation section does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Multi-layer web formation section, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-layer web formation section will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4100202