Drying and gas or vapor contact with solids – Apparatus – Rotary drums or receptacles
Reexamination Certificate
2006-10-03
2006-10-03
Gravini, S. (Department: 3749)
Drying and gas or vapor contact with solids
Apparatus
Rotary drums or receptacles
C162S358500
Reexamination Certificate
active
07114268
ABSTRACT:
A drying section of a machine for the manufacture of a material web, in particular of a paper or of a board web, comprises a smoothing nip which is extended in the web running direction and is formed between two pressing areas lying opposite one another of which at least one is formed by a shoe roll, with at least 70%, and preferably at least 90%, of the outer shoe roll diameter lying above the machine base. In a method for the combined drying and smoothing of a material web, in particular of a paper web or of a board web, in a drying section, the following steps are provided:the material web is first dried to a pre-settable drying content >60%, in particular >65%, and preferably >70%;the material web having this pre-settable drying content is guided through a smoothing nip which is extended in the web running direction and is formed between two pressing surfaces lying opposite one another of which at least one is formed by a rotating belt and of which at least one is heated;the pressing time resulting in the extended smoothing nip is selected >0.8 ms; andthe material web is further dried after the smoothing nip.
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Die Papierfabrikation und Deren Maschinen, Müller, 1928.
Gravini S.
Taylor & Aust P.C.
Voith Paper Patent GmbH
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