Method and apparatus for temperature gradient calendering

Details Method and apparatus for temperature gradient calendering Method and apparatus for temperature gradient calendering

1985-01-04

1986-08-19

Feldman, Peter

Presses

Methods

With heating or cooling

100 93RP, 100162B, 29116AD, B30B 1300, B30B 304, B30B 1534

Patent

active

046062645

ABSTRACT:
A web of paper or similar material is subjected to at least one nip formed by an iron roll and a compliant roll. The iron roll is heated to a temperature of at least the temperature at which the fibers in the web begin to deform. In the case of paper this is approximately 350.degree. F. Preferably the web is passed through two nips the first nip polishing one side of the web, the second nip polishing the other side. The result is a web having improved gloss without substantial loss of bulk and with minimum mottling.

REFERENCES:
patent: 1739572 (1929-12-01), Bidwell
patent: 3190212 (1965-06-01), Moore
patent: 4194446 (1980-03-01), Palovaara
patent: 4432277 (1984-02-01), Hartmann
Crotogino article, "Temperature-Gradient Calendering", Tappi Journal, Oct. 1982, pp. 97-101.

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