Roll cover and a covered roll
AssigneeMetso Paper, Inc.
InventorTommi Ajoviita
Life of this patent
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Abstract
Invention relates to a roll cover and a covered roll for paper, board, finishing and tissue machines. More specifically it relates to a roll particularly used in calendar which roll comprises a metal roll body and a cover of a composite material on it. The cover has at least three layers which comprise polymer matrix and fiber reinforcement the material of the being different at least in successive layers.
Claims18
Roll for a calender comprising a cylindrical roll body of metal material and on said body an elastic cover which cover comprises at least three layers comprising polymer matrix and fiber reinforcements, wherein the cover comprises at least three layers of which fiber material of the middle or the intermediate layer includes at least 25% of carbon fiber.
Roll for a calender comprising roll body of metal material and on said body an elastic cover circumferentially covering the outer surface of the roll body, the cover comprising at least three layers comprising polymer matrix and fiber reinforcements, wherein the cover comprises at least three layers of which fiber material of the middle or the intermediate layer includes at least 25% of carbon fiber.
Roll for a calender comprising roll body of metal material and on said body an elastic cover having an interface with the metal material of the roll body, the cover comprising at least three layers comprising polymer matrix and fiber reinforcements, wherein the cover comprises at least three layers of which fiber material of the middle or the intermediate layer includes at least 25% of carbon fiber.
Dependencies are inferred from the claim text.