Paper making and fiber liberation – Apparatus – Running or indefinite length product forming and/or treating...
Patent
1991-06-10
1993-04-13
Hastings, Karen M.
Paper making and fiber liberation
Apparatus
Running or indefinite length product forming and/or treating...
162203, 162352, D21F 100
Patent
active
052019993
ABSTRACT:
A twin wire forming apparatus for forming a web from stock having an ash content above 20% has upstream end disposed closely adjacent to a headbox. A curved shoe cooperates with a second wire and is immediately downstream relative to the upstream end of the forming section. The second wire is between a first wire and the shoe, so that a first portion of water is removed through the first wire when the wires and the stock move over the shoe. A dewatering device is between the shoe and the downstream end of the forming section and cooperates with the first wire and is on the opposite side of the wires relative to the shoe. The dewatering device has a curvature which is less than, and opposite to that of the curved shoe. A second portion of water is removed from the stock through the second wire during movement of the stock and the wires over the dewatering device. A further dewatering shoe is between the dewatering device and the downstream end of the forming section, and cooperates with the second wire and is on the same side of the wires as the shoe. The further shoe is connected to a source of partial vacuum such that a third portion of water is removed from the stock through the second wire during movement of the stock and the wires over the further shoe.
REFERENCES:
patent: 3847731 (1974-11-01), Arledter
patent: 3944464 (1976-03-01), Means
patent: 4125428 (1978-11-01), Phelps
patent: 4153504 (1979-05-01), Justus
patent: 4414061 (1983-11-01), Trufitt et al.
patent: 4557802 (1985-12-01), Waris
patent: 4609435 (1986-09-01), Tissari
patent: 4790909 (1988-12-01), Harwood
patent: 4830709 (1989-05-01), Turner et al.
patent: 5034098 (1991-07-01), Hergert
Field Roderic
Harwood John W.
Jackson Peter
Archer David J.
Beloit Technologies Inc.
Campbell Raymond W.
Hastings Karen M.
Veneman Dirk J.
LandOfFree
Twin wire forming apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Twin wire forming apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Twin wire forming apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1153050