D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
34/29
D21F 5/04 (2006.01) F26B 13/08 (2006.01)
Patent
CA 1261141
A B S T R A C T A paper making machine dryer section and a method of operating and controlling the same, wherein the dryer rolls are freely rotatable and are rotatably actuated entirely by a dryer felt drive. In a preferred arrangement, there are two tiers of cooperatively related dryer rolls over which a paper web to be dried is run in a sinuous path successively around the dryer rolls of the tiers. Each of the tiers has a respective dryer felt running over and guiding and holding the web onto the dryer roll peripheral surfaces in the associated tier. The dryer felts run under tension over guide rollers. In each tier at least one of the guide rollers is motor driven for thereby driving the associated dryer felt. While the felt of each tier effects synchronized running of all of the dryer rolls in that tier, synchronization of the motors of the tiers one with the other is effected by speed regulators connected with a frequency reference and speed control.
433785
Metso Paper Inc.
Mitsubishi Heavy Industries Ltd.
Ridout & Maybee Llp
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