Extended nip press
AssigneeBeloit Corporation
InventorsEdgar J. Justus, Arnold J. Roerig
Life of this patent
Estimating the term…
Abstract
An extended nip press for removing water from a traveling web in a paper machine including a press roll wth an elongate shoe having a concave surface facing the roll and forming an extended nip therebetween with an endless belt trained over the shoe for passing through the nip and first and second belts passing through the nip with the belt supported by a plurality of guide rolls or by an annular shell having continuous smooth outer surface extending from the outgoing side of the nip back to the oncoming side of the nip with a beam within the shell and a uniform fluid support for the shoe supported on the beam.
Claims7
An extended nip press for removing water from a traveling web in a paper machine comprising in combination:
- a press roll;
- an elongate shoe forming a press nip with said press roll and having a concave surface to conform to said roll so that the press nip is formed elongate in the direction of web travel through the nip;
- a first endless felt trained over said roll to travel through said nip;
- an endless belt trained over said shoe for passing through said nip;
- a second endless felt trained over said belt to travel through said nip with the web passing through the nip between said felts;
- means for providing a lubricant between said shoe and belt;
- and guide means within said belt guiding and supporting the belt on the shoe;
- said guide means having an outer smooth curved surface of a circumference slightly smaller than the belt to provide a continual smooth sliding surface for the belt so that the belt operates under zero tension and is self-aligning wherein the belt is guided substantially along the entire circumference of the guide means.
Dependencies are inferred from the claim text.