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US 4,285,647 AGranted
Apparatus for the manufacture of fibrous webs
AssigneeAmerican Can Company
InventorCedric A. Dunkerly, II
Life of this patent
Estimating the term…
Abstract
Apparatus and method for the manufacture of a fibrous web comprises a distributor for depositing dry wood fibers on a planar section of a linearly movable forming wire. A suction box is disposed to the side of the forming wire opposite the distributor. The distributor and suction box are so cooperatively constructed and arranged as to impart a velocity component to the fibers in the direction of movement of the forming wire, so that the angle of inclination of fiber deposition relative to the moving forming wire is from about 21 degrees to about 30 degrees.
Claims11
An apparatus for the manufacture of fiber webs, comprising:
- distributor means for dry fibers;
- a forming wire including a planar section disposed beneath said distributor means and linearly movable at a predetermined first velocity;
- suction box means disposed beneath said planar section of said forming wire and operative to draw air through said forming wire at a predetermined second velocity normal to said planar section;
- and means for imparting a horizontal velocity component less than said first velocity to said fibers in the direction of movement of said forming wire, wherein the fibers are caused to impinge uopn the forming wire at an angle of from about 21 degrees to about 30 degrees, said second velocity is in excess of about 250 feet per minute, and said first velocity is in excess of about 500 feet per minute.
1 more element
An apparatus for the manufacture of fibrous webs, comprising:
- distributor means for dry fibers having a bottom, horizontally extending opening;
- a planar section disposed beneath said opening, and linearly movable at a predetermined first velocity;
- suction box means disposed beneath said planar section of said forming wire, and operative to draw air through said forming wire at a predetermined second velocity normal to said forming wire, said suction box being defined in part by parallel upstream and downstream walls that extend transversely of the direction of movement of said forming wire and are inclined downwardly in said direction of movement at an angle in a range of from about 21 degrees to about 30 degrees from the horizontal, the upper edge of the upstream wall being aligned with the upstream edge of the distributor bottom opening and the upper edge of the downstream wall being spaced slightly downstream of said distributor bottom opening in provision of a gap extending transversely of the direction of forming wire movement;
- an outlet port disposed in the lower region of said suction box adjacent the lower edge of said downstream wall;
- and a sealing roll extending transversely of said forming wire movement and partially covering said gap, the construction and arrangement being such that a horizontal velocity component less that said first velocity is imparted to said air and fibers in the direction of movement of said forming wire.
2 more elements
An apparatus for the manufacture of fibrous webs, comprising:
- distributor means for dry fibers having a bottom, horizontally extending opening;
- a planar section disposed beneath said opening, and linearly movable at a predetermined first velocity;
- suction box means disposed beneath said planar section of said forming wire and operative to draw air through said forming wire at a predetermined second velocity normal to said forming wire, said suction box being defined in port by parallel upstream and downstream walls that extend transversely of the direction of movement of said forming wire and are inclined downwardly in said direction of movement and disposed at an angle in a range of from about 21 degrees to about 30 degrees from the horizontal, the upper edge of the upstream wall being spaced slightly downstream of the upstream edge of the distributor bottom opening and the upper edge of the downstream wall being spaced slightly downstream of said distributor bottom opening in provision of a gap extending transversely of the direction of forming wire movement;
- an outlet port disposed in the lower region of said suction box adjacent the lower edge of said downstream wall;
- a vertical wall spaced upstream of said upstream inclined wall aligned with the upstream edge of said bottom opening, and cooperatively disposed with said inclined wall to form a dead space beneath said forming wire;
- a clean out port communicating with said dead space;
- and a sealing roll extending transversely of said forming wire movement and partially covering said gap, the construction and arrangement being such that a horizontal velocity component less than said first velocity is imparted to said air and fibers in the direction of movement of said forming wire.
4 more elements
Dependencies are inferred from the claim text.