Alternating top and bottom felted dryers connected without open

Details Alternating top and bottom felted dryers connected without open Alternating top and bottom felted dryers connected without open

1997-01-27

1999-07-13

Bennett, Henry

Drying and gas or vapor contact with solids

Apparatus

Rotary drums or receptacles

34114, 34116, F26B 1102

Patent

active

059210001

ABSTRACT:
A dryer section employs top-felted and bottom-felted dryer sections each comprised of a single steam-heated drying cylinder with a diameter of about 12 feet. The web is transferred between drying cylinders by a two vacuum roll transfer without an open draw. The dryer fabric wrap on the large dryer cylinders is over 270 degrees resulting in large drying capability per dryer roll. Because each large dryer is followed by another large dryer roll which dries the opposite side of the web, uniformity of drying is maintained. Each dryer cylinder may have its own dryer fabric stretcher and guides. Alternatively, individual dryer fabrics service multiple top-felted dryers and bottom-felted dryers respectively. The web is constrained approximately 96 percent of the time as it passes through the is dryer section. The dryer section can achieve 2.9 inches of dryer surface in the machine direction for every inch of dryer section.

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