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US 4,103,434 AGranted
Drying apparatus
OwnerRichard Turner Walkerinventor
Life of this patent
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Abstract
A drying apparatus suitable for use in the drying of paper web and which comprises a housing, rollers located within the housing for supporting the paper web which is transported through the housing, and means for applying heat to the rollers. The heat is applied directly to the rollers' periphery and at such a level as to cause vaporization of moisture contained within the web, whereby a vapor layer is created between the web and the portion of the rollers' periphery which would otherwise be contacted at any given time by the web.
Claims11
A drying apparatus comprising:
- a housing;
- a plurality of spaced-apart, imperforate roller means located within the housing with spaced-apart circumferences for supporting a fibrous web of material transported through the housing;
- means to introduce fibrous web material to be dried into said housing located adjacent to, but spaced apart from, the first of said roller means;
- guide means to direct said fibrous web material to overlie at least a portion of each of said roller means;
- means to drive each of said roller means;
- heating means to heat the roller means sufficient to expand by vaporization, moisture contained within the fibrous material to be dried;
- and
- web material tensioning means located adjacent to and spaced-apart from the last of said roller means to apply sufficient tension to said web material to permit said web material to be transported through said housing about said roller means and spaced-apart from the periphery thereof by a layer of vapor from said vaporized moisture which discharges from the side of the web adjacent the portion of the roller periphery which would otherwise be contacted at any given time by the material but for the presence of said vapor layer.
5 more elements
Dependencies are inferred from the claim text.