Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1993-08-16
1995-06-27
Hastings, Karen M.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162303, 162304, D21F 100, D21F 148
Patent
active
054276543
ABSTRACT:
A multi-ply web forming apparatus is disclosed for forming a top ply on a base ply. The former includes a looped lower forming wire for receiving the base ply thereon and a top looped forming wire cooperating with and disposed above the lower wire for defining therebetween a generally horizontally disposed forming section having a first and a second end. A turning bar defines a curved surface for guiding the lower wire. A secondary headbox ejects stock towards and onto the base ply. A curved dewatering shoe is disposed beneath the lower wire such that a portion of water from the top ply is ejected through the top wire. A vacuum slot collects a portion of water upwardly away from the top wire. An inverted vacuum box is disposed downstream relative to the vacuum slot and a plurality of dewatering blades disposed between a curved face of the vacuum box and the top wire guide the top wire therepast. A plurality of dewatering foils are disposed on the opposite side of the wire relative to the blades such that the consistency of the stock forming the top ply is increased during passage thereof through the forming section while maintaining the consistency of the top ply uniform in a "Z" direction so that crushing of the resultant web is inhibited.
REFERENCES:
patent: 4830709 (1989-05-01), Turner et al.
patent: 5074964 (1991-12-01), Partanen
patent: 5167770 (1992-12-01), Bubik et al.
patent: 5203967 (1993-04-01), Bando et al.
patent: 5282933 (1984-02-01), Bubik et al.
Gray Paul T.
Ormesher Eric
Archer David J.
Beloit Technologies Inc.
Campbell Raymond W.
Hastings Karen M.
Veneman Dirk J.
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