Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Patent
1988-04-06
1989-12-26
Bennet, Henry A.
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
34123, F26B 1102
Patent
active
048888834
ABSTRACT:
A multiculer dryer in a paper machine, having several successive cylinder sections of which one or more are equipped with a twin-wire draw in a manner such that a web being dried is drawn unsupported between cylinder rows. A closed draw is used in section gaps in a manner such that a drawing or supporting wire of a preceding section is conveyed to contact a top cylinder of a following section at a small angle. A special section gap cylinder is used near the section gap, the cylinder either not being driven or which from a point of view of the drive, belongs to the preceding drying section. The drying wire of the preceding section is wound over the section gap cylinder, preferably over a sector greater than about 180.degree., this drying wire either being a single wire-wire draw drying wire or a top wire of a preceding section twin-wire draw. The web supported by the wire is guided as an essentially vertical run from the sector of the section gap cylinder to the top cylinder of the next section. There is an open space below the section gap cylinder which allows a waste web to be removed by gravity.
REFERENCES:
patent: 4566946 (1986-01-01), Koponen et al.
patent: 4625430 (1986-12-01), Aula et al.
Bennet Henry A.
Valmet Paper Machinery Inc.
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