Infrared heating calender roll controller

Details Infrared heating calender roll controller Infrared heating calender roll controller

1985-04-12

1987-04-21

Feldman, Peter

Presses

Methods

With heating or cooling

100 47, 100 93RP, 100168, 100162B, 29116AD, 219 1041, 219354, 219470, 34 41, 34 25, 169 5, 169 46, 169 54, B30B 1534, B30B 304

Patent

active

046587160

ABSTRACT:
The present invention is directed toward a controller for controlling the local diameters of a temperature sensitive calender roll by selectively heating sections of a sheet of calenderable material with infrared lamps while the sheet is in contact with the calender roll or before the sheet contacts the roll. The calender roll is made of a material having at least one dimension which responds to changes in temperature. Therefore, thermal expansion of the roll, resulting from contact of the heated sheet with the roll surface, corrects local non-uniformities in the calender roll diameters. If the calender rolls unexpectedly stop or slow down so that the sheet of calenderable material becomes overexposed to infrared radiation, a fire detecting device detects and extinguishes the fire by turning off the infrared heating lamps and flooding the area around the lamps with a fire-extinguishing fluid.

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Pulp & Paper Magazine, Nov. 1984, pp. 54-55.
Pulp & Paper Magazine, Dec. 1984, p. 157.

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