Apparatus for finishing paper

Details Apparatus for finishing paper Apparatus for finishing paper

1996-10-07

1997-07-22

Czaja, Donald E.

Presses

With additional treatment of material

Adding materials

100162R, 162361, D21G 100, B30B 1530

Patent

active

056494785

ABSTRACT:
A method and apparatus are 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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patent: 5122232 (1992-06-01), Lyman et al.
patent: 5314119 (1994-05-01), Watt
patent: 5522312 (1996-06-01), Johnson

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