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US 4,500,588 AGranted
Conveyor felt for paper making and a method of manufacturing such a felt
AssigneeTamfelt Oy Ab
InventorKristian Lundstrom
Life of this patent
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AssigneeTamfelt Oy Ab
InventorKristian Lundstrom
Estimating the term…
A conveyor felt for conveying a paper web through a press section of a paper machine, comprising a support fabric (1) formed by a yarn structure and fibre bat layer (2) needled to the support fabric at least on one side thereof. The felt is, with the exception of the surface portion (4) of the fibre bat layer facing the web, filled with a filling material (3) so that the felt is completely air impermeable and has a chamois-like surface (2a). A barrier layer is formed in the fibre bat layer for preventing the filling material from penetrating into the surface facing the web. The barrier layer is obtained by calendering the surface of the fibre bat layer facing the web so as to make it smooth and compact or by providing in the fibre bat layer a fine-fibered fibre bat layer or a filtering intermediate layer on the side of the surface facing the web. The filling of the felt prevents blowing and rewetting at a conveying speed of up to 1000 m/min although the conveyor felt has a chamois-like surface facing the web.
A conveyor felt for supporting and conveying a fibre web through a press section of a paper machine, said conveyor felt comprising at least one needled fibre bat layer, wherein said fibre bat layer, except for a surface portion thereof facing the web, includes a resinous or elastomeric air impermeable filling material filling pores of the bat between individual fibres thereof so that the bat layer is substantially entirely air impermeable, said filling material tending to prevent rewetting of the felt and eliminate compressibility of the conveyor felt to prevent the occurrence of blowing as the felt is compressed in a press nip so that the fibre web does not lift off the felt.
A method of manufacturing a conveyor felt used for conveying a paper web through a press section of a paper machine, comprising the steps of needling a coarse fibre bat layer to a support fabric;
A method of manufacturing a conveyor felt used for conveying a paper web through a press section of a paper machine, comprising the steps of needling a fibre bat layer at least to one side of a support fabric of yarn structure;
A method of manufacturing a conveyor felt used for conveying a paper web through a press section of a paper machine, comprising the steps of:
Dependencies are inferred from the claim text.