Device for the production of multiple layered paper or cardboard

Details Device for the production of multiple layered paper or cardboard Device for the production of multiple layered paper or cardboard

1996-08-23

1998-08-04

Hastings, Karen M.

Paper making and fiber liberation

Apparatus

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

162301, 162303, D21F 1104

Patent

active

057888167

ABSTRACT:
A gap former, consisting of a double sieve former 3 which is made up by an inner sieve 4 and an outer sieve 5, is in the initial stage of the process wrapped around a roller press 8 with a diameter of at least 800 mm. After the sieves have traveled such that a given segment of the sieves is no longer in contact with the roller press, the segment enters between a number of contour brackets 10 and 11 at which time the segment is moving rather steeply downward. During this stage an upper layer 6 of paper or cardboard which has been compressed is deposited onto a lower layer 7 that is already resting on the primary longitudinal sieve 2.

REFERENCES:
patent: 3915791 (1975-10-01), Langdon
patent: 3985612 (1976-10-01), Watanabe
patent: 4430159 (1984-02-01), Bubik et al.
patent: 5074964 (1991-12-01), Partanen
patent: 5167770 (1992-12-01), Bubik et al.
patent: 5259929 (1993-11-01), Bubik et al.
patent: 5389206 (1995-02-01), Buck et al.
patent: 5607555 (1997-03-01), Grossman et al.
Schmidt et al, "Former fur die Herstellung mahrlagiger Bahnen", Wochenblatt fur Papierfabrikation, 23/24, 1977, pp. 975-980.

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