Forming fabric
AssigneeNordiskafilt AB
InventorLars B. Osterberg
Life of this patent
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Abstract
A forming fabric comprising an upper layer which is intended to serve as the paper-forming side and consists of thinner yarns, and a bottom layer which consists of coarser yarns. The two layers are interconnected in that threads form the upper layer alternately pass downwardy to interweave with the bottom layer and in the upper layer replace one another in such a manner that together these threads form the same weave pattern with the upper layer as the rest of the yarns in that layer, which yarns do not interweave with the bottom layer.
Claims4
An improved double-layer type of forming fabric for use in papermaking, cellulose and similar machines, said forming fabric consisting of two integral weaves, each one of said weaves comprising its separate sets of respective warp threads and weft threads, the first one of said weaves, the top cloth, arranged in the position of use of said fabric to face the material being formed, said top cloth being made up by thinner threads than the second one of said weaves, the bottom cloth, the improvement comprising sequestial positions in the pattern of said top cloth where a thread in the weave thereof does not appear, pairs of adjacent additional threads running in the same direction and interconnecting said first and second weaves, said pairs of threads repeating in sequence and alternately passing downwards from said top cloth to interweave with said bottom cloth, each of said respective pairs interweaving with said top cloth in one of said sequential positions whereby to complete the pattern of said top cloth.
Dependencies are inferred from the claim text.