Press roll
AssigneeOy Tampella AB
InventorKyosti Halttula
Life of this patent
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Abstract
The invention relates to a press roll arranged to interact with a second roll in the wet end of a paper or paper board machine for forming a nip between the rolls. In the press roll a surface is arranged to be pressed against the second roll and is made of an elastic material for extending the nip. In order to provide a simple and versatile structure, the surface made of an elastic material is formed by a separate shell portion which surrounds a body of the press roll and is positioned over its entire length at a distance from the body. The shell portion is supported to be stationary with respect to the body by means of end flanges provided in the ends of the body, so that the shell portion is able to yield over the entire length thereof radially inwards towards the body locally at the nip point.
Claims6
A rotatable press roll arranged to interact with a second roll in the wet end of a paper of a paper board machine for forming a nip between rolls, said press roll comprising a surface arranged to be pressed against the second roll and being made of an elastic material for extending the nip, said elastic material surface being formed by a separate shell portion surrounding a body of the press roll, and being positioned over its entire length at a distance from the body to form a space therebetween, said surface being further supported to be nonrotatable with respect to the body be means of end flanges provided in the ends of the body and contacting each end of said surfaces, the shell portion and the ends thereof being readily yieldable over the entire length thereof radially inwards towards the body locally at the nip point whereby a section of said shell portion in contact with said second roll temporarily deforms along with the end portions of said section of said shell portion.
Dependencies are inferred from the claim text.