Method of cooling hot webs

Details Method of cooling hot webs Method of cooling hot webs

1988-05-02

1990-05-01

Burr, Edgar S.

Printing

Processes

With heating or cooling

1014241, 34 62, 165 90, B41F 2304

Patent

active

049208810

ABSTRACT:
The method for cooling a hot web by passing it across a rotating thermally conductive chill roller having a circulating coolant therein. In accordance with this invention, one introduces as a coolant to the chill roller a liquid refrigerant at a temperature and pressure permitting the refrigerant to exist in liquid form, the temperature being also above the dew point of the ambient atmosphere. Likewise, the boiling point of the refrigerant at the desired temperature and pressure is low enough to cause heat to be absorbed by the chill roller substantially by vaporization of the liquid refrigerant. One then withdraws refrigerant vapor from the chill roller, and typically refrigerates it to reform the liquid phase for return to the chill roller. Typically, chlorofluorocarbon refrigerants are preferred.

REFERENCES:
patent: 3580003 (1971-05-01), Dolan
patent: 4263724 (1981-04-01), Vits
patent: 4377936 (1983-03-01), Gram
patent: 4462169 (1984-07-01), Daane
patent: 4774771 (1988-10-01), Littleton
CRC Handbook of Chemistry and Physics, 66th Edition 1985-1986, CRC Press 1985, pp. E-31, E-32, E-33.

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