Paper making and fiber liberation – Processes and products – Multi-layer waterlaid webs or sheets
Patent
1994-09-14
1995-11-21
Hastings, Karen M.
Paper making and fiber liberation
Processes and products
Multi-layer waterlaid webs or sheets
162133, 162303, 162304, D21F 1104
Patent
active
054683483
ABSTRACT:
A multi-ply paper web is formed by bringing a top ply liner into ply-bonding engagement with a base ply web (W.sub.B) traveling on a base ply forming wire (36). The top ply liner (W.sub.T) is formed between two co-running forming wires (10, 20) in a convex upwardly/concave downwardly curved, substantially horizontal forming zone. Dewatering in the forming zone is effected by applying sub-atmospheric air pressure solely beneath the lower surface of the top ply liner (W.sub.T) being formed. Water is removed from the upper surface of the top ply liner (W.sub.T) solely by wire tension, gravity and centrifugal force created by passing the co-running forming wires (10, 20) over the convex upwardly curved path of travel. This permits a greater concentration of pulp stock fines to remain in the upper surface of the top ply liner (W.sub.T) to effect greater ply-bonding affinity with the base ply (W.sub.B) when the two plies (W.sub.T, W.sub.B) are brought together and bonded.
REFERENCES:
patent: 3578559 (1971-05-01), Beck
patent: 3582467 (1971-06-01), Gustafson et al.
patent: 3607625 (1971-09-01), Hill et al.
patent: 3726758 (1973-04-01), Parker et al.
patent: 3876498 (1975-04-01), Justus
patent: 3884756 (1975-05-01), Gustafson
patent: 3985612 (1976-10-01), Watanabe
patent: 3994774 (1976-11-01), Holme et al.
patent: 4153504 (1979-05-01), Justus
patent: 4154645 (1979-05-01), Kankaanpaa 162133
Blackledge James
Salvai Nazzareno
Turner James A.
Beloit Technologies Inc.
Campbell Raymond W.
Hastings Karen M.
Mathews Gerald A.
Veneman Dirk J.
LandOfFree
Multi-ply web former and method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Multi-ply web former and method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Multi-ply web former and method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1134354