D - Textiles – Paper – 21 – F
Patent
D - Textiles, Paper
21
F
D21F 5/04 (2006.01)
Patent
CA 2120933
A paper machine drying apparatus is disclosed for drying a first and a second side of the web. The apparatus includes a first single tier drying section for drying only the first side of the web (12). The first drying section includes a first plurality of dry- er cylinders (58, 63) for drying the first side of the web, and a first plurality of vacuum rolls disposed in close proximity between adjacent dryer cylinders of the first plurality of dryer cylinders. A second single tier drying section for drying only the second side of the web (12) in which the drying section includes a second plurality of dryer cylinders (94-99) for drying the second side of the web, such cylinders (94-99) being disposed immediately downstream relative to the first drying section. A second plurality of vac- uum rolls are arranged such that each vacuum roll is disposed in close proximity between adjacent dryer cylinders of the second plurality of dryer cylinders (94-99). At least one of the vacuum rolls of the first and the second drying sections have a smaller di- ameter than the diameter of any of the dryer cylinders of the first and second drying sections, and the second drying section is a displaced downstream mirror image of the first drying section.
Skaugen Borgeir
Wedel Gregory L.
Metso Paper Inc.
Mitsubishi Heavy Industries Ltd.
Ridout & Maybee Llp
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