Paper making and fiber liberation – Processes and products – Running or indefinite length work forming and/or treating...
Patent
1995-08-29
1997-03-04
Czaja, Donald E.
Paper making and fiber liberation
Processes and products
Running or indefinite length work forming and/or treating...
162206, 162361, 427209, 100 38, D21F 1100, D21G 100, B30B 1534
Patent
active
056075537
ABSTRACT:
A method is disclosed for finishing a web of paper, paperboard or the like to achieve enhanced stiffness with a minimal loss of caliper or bulk. For this purpose, liquid spray devices are substituted for the conventional waterboxes of a machine calender. These devices permit the independent control of the thickness of liquid films applied to the transfer rolls of the calender with greater uniformity. The liquid films are transferred to the surfaces of the web at transfer nips. The method produces an I-beam effect in the web with highly densified and smooth surface layers and a bulky interior to maximize stiffness.
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Czaja Donald E.
Fortuna Jos'e A.
Westvaco Corporation
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