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US 4,738,751 AGranted
Fabric edge support apparatus for fourdrinier paper machine
AssigneeAppleton Specialty Products, Inc.
InventorDoug Newcombe
Life of this patent
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AssigneeAppleton Specialty Products, Inc.
InventorDoug Newcombe
Estimating the term…
A Fourdrinier-type paper machine having a wet end with a headbox for storing a mixture of pulp and water, this pulp mixture being jetted onto a fabric having two side edges, this fabric forming an endless belt the upper surface of which is caused to continuously move away from the headbox, including an apparatus for continually supporting and curling the edge of the fabric so as to prevent loss of pulp mixture off the sides of the fabric and so as to prevent edge wave formation which would require substantial trimmage and waste. The apparatus includes a pair of bars having a wedge-shaped cross-section, one edge of each inserted under one side of the fabric, to cause the edge of the fabric to curl upward. Apparatus is provided to adjust the amount of curl. Several of these curl adjusting apparatuses are placed along the length of the bars so that the amount of curl can be different at different points along the bars. For instance, the curl might be greatest at the point where the pulp hits the fabric, and it may be slowly tapered to zero over the length of the bars. The upper surface of the fabric is also caused to continuously move from side to side, and an end block is provided at the leading edge of each bar to prevent the fabric from running off the edge of the bar during the course of any lateral movement of the fabric.
In a Fourdrinier-type paper machine having a wet end with a headbox for storing pulp mixture and supported by a support frame, said pulp mixture being jetted onto a fabric having two side edges, said fabric forming an endless belt the upper surface of which is caused to continuously move longitudinally away from said headbox as well as side to side, said upper surface being supported by a plurality of transversely arranged foil blades having a belt-supporting surface of predetermined width, adjacent foil blades being spaced apart by predetermined spacing,
In a Fourdrinier-type paper machine having a wet end with a headbox for storing pulp mixture and supported by a support frame, said pulp mixture being jetted onto a fabric having two side edges, said fabric forming an endless belt the upper surface of which is caused to continuously move longitudinally away from said headbox as well as side to side in the course of its longitudinal motion,
In a Fourdrinier-type paper machine having a wet end with a headbox for storing pulp mixture and supported by a support frame, said pulp mixture being jetted onto a fabric having two side edges, said fabric forming an endless belt the upper surface of which is caused to continuously move longitudinally away from said headbox as well as side to side in the course of its longitudinal motion,
Dependencies are inferred from the claim text.