Forming section

Details Forming section Forming section

2007-06-12

2011-11-01

Hug, Eric (Department: 1741)

Paper making and fiber liberation

Processes and products

Running or indefinite length work forming and/or treating...

C162S211000, C162S217000, C162S300000, C162S301000, C162S303000, C162S352000

Reexamination Certificate

active

08048269

ABSTRACT:
A forming section has a lower wire loop (11), which constitutes a single-wire section (T) following a breast roll (12). A first dewatering zone (Z1) has at least one stationary, first forming shoe (40) followed by a pulsating strip cover (50). The first forming shoe has leading and trailing edges and underpressure affecting through holes of the cover. The holes are openings or slots substantially in the longitudinal direction of the machine, whereby non-pulsating dewatering is applied on the stock travelling on top of the lower wire. A pulp suspension jet is fed from a headbox (30) at an impact point after the shoe leading edge. The cover is straight at least in the area between the impact point of the pulp suspension jet and the trailing edge. The impact of the pulp suspension jet on the forming wire is thus better controlled in a better way, increasing production speed.

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Written Opinion issued in PCT/FI2007/050348.
Search Report issued in PCT/FI2007/050348.
Search Report issued in FI 20065446.

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