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US 6,783,485 B2Granted
Roll of a paper/boardmaking machine
AssigneeMetso Paper, Inc.
InventorsEero Savolainen, Jorma Snellman
Life of this patent
Estimating the term…
Abstract
A roll for a paper or board machine is produced by forming a tubular roll blank by bending out of a planar sheet or by means of centrifugal casting. The roll blank is first coated with a material having a modulus of elasticity and a density lower than those of steel and the coated roll blank is turned on a lathe to a desired shape and to a desired surface quality.
Claims4
A roll in a paper or board machine comprising:
- a roll blank defining a rotational axis, the roll blank formed of a bent planar sheet and having a longitudinal seam weld, the roll blank not having a lathe turned cylindrical surface;
- and
- a coating applied to the roll blank, the coating formed of a material that has a modulus of elasticity and a density lower than those of steel, the roll blank with applied coating having a lathe turned exterior coating surface centered about said rotational axis, such that the exterior coating surface is cylindrical with respect to the rotational axis, and the thickness of the coating when measured from the exterior coating surface of the roll blank is nonuniform.
Dependencies are inferred from the claim text.