Set of ribs in a dewatering device in a paper machine
AssigneeValmet Corporation
InventorsSamppa Salminen, Aimo Narvainen
Life of this patent
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Abstract
A set of ribs in a dewatering device in a paper machine for supporting and/or loading at least one wire in the paper machine and/or doctoring water from the inner face(s) of the at least one wire. The set of ribs includes at least two cross-direction ribs placed at a distance from one another in the machine direction and whose height positions are adjustable. The ribs of the set of ribs are interconnected in pairs by intermediate parts, and by crank mechanisms placed at a distance from one another in the cross direction of the at least one wire so that the ribs are loadable independently from one another.
Claims20
In a set of ribs in a dewatering device in a paper machine, the set of ribs comprising at least two cross-direction ribs for supporting and/or loading at least one wire in the paper machine and/or doctoring water from an inner face of at least one wire, said ribs being spaced from one another in the machine direction, loading means for loading said ribs such that said ribs have adjustable height positions relative to the at least one wire, and intermediate parts for interconnecting said at least two ribs in pairs such that at least one pair of interconnected ribs is formed, the improvement comprising
- at least two crank mechanisms for further interconnecting said ribs in each of said at least one pair of interconnected ribs, said at least two crank mechanisms being spaced from one another in the cross direction of the wire and structured and arranged to enable independent loading of each of said ribs in each of said at least one pair of interconnected ribs.
A twin-wire forming zone in a web former, comprising
- means for guiding a first wire in a loop,
- means for guiding a second wire in a loop such that at least a portion of said second wire runs together with said first wire to thereby define the twin-wire forming zone,
- a water drain box arranged in said loop of said first wire and comprising loading ribs for loading said first wire, and
- a set of ribs arranged in said loop of said second wire in opposed relationship to said water drain box such that one of said ribs of said water drain box is arranged in opposed relationship to a gap defined between an adjacent pair of said ribs of said set of ribs,
- said set of ribs comprising
- at least two cross-direction ribs spaced from one another in the machine direction,
- loading means for loading said ribs such that said ribs have adjustable height positions relative to said second wire,
- intermediate parts for interconnecting said at least two ribs in pairs such that at least one pair of interconnected ribs is formed, and
- at least two crank mechanisms for further interconnecting said ribs in each of said at least one pair of interconnected ribs, said at least two crank mechanisms being spaced from one another in the cross direction of the wire and structured and arranged to enable independent loading of each of said ribs in each of said at least one pair of interconnected ribs.
Dependencies are inferred from the claim text.