Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1989-11-15
1991-11-12
Hastings, Karen M.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162123, 162300, D21F 902, D21F 1104
Patent
active
050645021
ABSTRACT:
A paper forming apparatus has a lower looped forming wire disposed for a portion of its travel over a curved apron board. The paths of forming wire travel upstream and downstream of the apron board diverge. Such divergence allows a secondary headbox to be brought into such a juxtaposition with the forming wire coming off the apron board as to permit the stock stream to impinge the forming wire both at a low angle and at a short distance to enhance formation of an additional web ply over a previously formed web ply. In one embodiment, an upper looped forming wire is brought into co-running engagement with the lower forming wire over the downwardly extending downstream path of travel. In two-wire embodiments, the turning roll for the upstream end of the upper forming wire is downstream of both the headbox slice and apron board to permit the headbox slice to be positioned close to the lower forming wire and allow the stock stream to be projected downwardly to impinge the lower forming wire at a small angle or a short distance from the slice, or both.
REFERENCES:
patent: 3625814 (1971-12-01), DeNoyer
patent: 3726758 (1973-04-01), Parker et al.
patent: 3752734 (1973-08-01), Notbohm
patent: 3856618 (1974-12-01), Roell
patent: 3951736 (1976-04-01), Kobayashi
patent: 3997390 (1976-12-01), Kankaanpaa
patent: 4146424 (1979-03-01), Justus
patent: 4153504 (1979-05-01), Justus
patent: 4414061 (1983-11-01), Trufitt et al.
patent: 4416730 (1983-11-01), Schiel
patent: 4425187 (1984-01-01), Armstrong et al.
patent: 4459175 (1984-07-01), Bubik et al.
patent: 4472244 (1984-09-01), Haltsonen
patent: 4557802 (1985-12-01), Waris
patent: 4894120 (1990-01-01), North
Beloit Corporation
Campbell Raymond W.
Hastings Karen M.
Mathews Gerald A.
Veneman Dirk J.
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