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US 5,327,661 AGranted
Method and apparatus for drying web
AssigneeInstitute of Paper Science and Technology, Inc.
InventorDavid I. Orloff
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AssigneeInstitute of Paper Science and Technology, Inc.
InventorDavid I. Orloff
Estimating the term…
The present invention is directed generally to a method and apparatus for drying a web of paper utilizing impulse drying techniques to provide a unique paper product having a predetermined pattern of delaminated paper fibers. In the method of the invention for drying a paper web, the paper web is transported through a pair of rolls wherein at least one of the rolls has been heated to an elevated temperature. The heated roll is provided with a planar surface having a predetermined pattern formed on the surface of a material having a low K value of less than about 3000 w.sqroot.s/m.sup.2 c and having a relatively low porosity. The material forming the predetermined pattern of the roll surface is preferably selected from the group consisting of ceramics, polymers, glass, inorganic plastics, composite materials and cermets. The remainder of the roll surface has a high K value of greater than about 3000. The material forming the remainder of the roll surface is preferably selected from steel, molybdenum, nickel and duralimin.
A method for impulse drying a web of paper to provide a paper product having a predetermined pattern of delaminated paper fibers comprising transporting a paper web through a pair of rolls wherein the surface of at least one of said rolls has been heated to an elevated temperature, said heated roll having a planar surface having a predetermined pattern formed on said surface of a material having a low K value of less than about 3000 w.sqroot.s/m.sup.2 c and having a low porosity, the remainder of said surface having a high K value of greater than about 3000 w.sqroot.s/m.sup.2 c.
A roll for use as the heated roll utilized in impulse drying of a web of paper to provide a paper product having a predetermined pattern of delaminated paper fibers, said roll having a planar surface having a predetermined pattern formed on said surface of a material having a low K value of less than about 3000 w.sqroot.s/m.sup.2 c and having a low porosity, the remainder of said surface having a high K value of greater than about 3000 w.sqroot.s/m.sup.2 c.
Dependencies are inferred from the claim text.