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US 4,688,335 AGranted
Apparatus and method for drying fibrous web material
AssigneeJames River Corporation of Nevada
InventorsWayne V. Krill, Richard P. Taylor, Thomas Wong
Life of this patent
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Abstract
A dryer for paper and similar fibrous web materials including a dryer roll having an outer cylindrically-shaped wall, a radiant heat source within the dryer roll adapted to heat the wall substantially uniformly about the entire periphery thereof, and nip-forming means forming a pressure nip with the dryer roll.
Claims18
Apparatus for drying fibrous web material comprising:
- a dryer roll mounted for rotatable movement, said dryer roll including an outer cylindrically-shaped wall and side walls cooperating with said cylindrically-shaped wall to define an interior;
- a radiant heat source disposed within the interior of said dryer roll and adapted to heat said cylindrically-shaped wall substantially uniformly about the entire periphery thereof, said radiant heat source comprising a burner mounted within the interior of said dryer roll, said burner including a cylindrically-shaped shell comprising at least one layer of ceramic fiber matrix with interstitial spaces between the fibers, said shell being coaxially disposed with respect to said dryer roll cylindrically-shaped wall;
- means for introducing a flow of air-fuel mixture into the shell and outwardly through the spaces defined by the fibers of the fiber matrix whereby combustion takes place at the fiber matrix;
- and
- nip forming means forming a pressure nip with said dryer roll, said nip adapted to accommodate web material to be dried.
2 more elements
A method of drying fibrous web material, comprising the steps of:
- forming a press nip between a dryer roll having a cylindrically-shaped wall defining an interior and a press roll;
- passing web material through said nip by rotating said rolls;
- positioning a radiant heat source within said dryer roll interior, said radiant heat source including a cylindrically-shaped shell comprising at least one layer of ceramic fiber matrix with interstitial spaces between the fibers, said shell being coaxially positioned relative to said dryer roll cylindrically-shaped wall,
- introducing a flow of air-fuel mixture into the shell and flowing the mixture outwardly through the spaces defined by the fibers of the fiber matrix;
- and
- energizing said radiant heat source by igniting the air-fuel mixture, with combustion taking place at the fiber matrix, to heat said cylindrically-shaped wall substantially uniformly about the entire periphery thereof to at least partially dry the web material passing through said nip.
3 more elements
Dependencies are inferred from the claim text.