Felt for dehydration of a fiber web
AssigneeAlbany International Corp.
InventorMichel Mazere
Life of this patent
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Abstract
The present invention relates to a felt for dehydration of a fiber web, preferably an asbestos fiber web in a machine for manufacturing of asbestos cement pipes, which felt being in the form a two layered fabric, one of the layers constitutes the upper layer and is closest to the fiber web. It is desirable to improve known felts in order to reduce their susceptibility to be filled up and worn out. Such a technical problem is solved in accordance with the present invention by a combination of twisted yarn threads of spun staple fibers and monofilament threads, said twisted yarn threads of spun staple fibers in at least the upper layer being roughened.
Claims1
Felt for dehydration of a fiber web, preferably an asbestos fiber web in an asbestos pipe manufacturing machine, comprising a fabric having a roughened upper layer and a lower layer;
- the upper layer warp and weft being composed of twisted threads of staple;
- the lower layer warp and weft being composed of twisted threads of monofilament;
- the upper and lower layers being joined by threading warp thread of the upper layer down under weft threads of the lower layer;
- the monofilament threads serving to space the staple threads apart to restrict filling.
Dependencies are inferred from the claim text.