Composite forming fabric
AssigneeJWI Ltd.
InventorDale B. Johnson
Life of this patent
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Abstract
A composite paper making fabric comprising at least two complete weaves each formed by its own set of warp and weft yarns and interconnected by a binder yarn which is interwoven with the two complete weaves. An upper one of the complete weaves constitutes a paper-side weave which is comprised of flattened warp yarns interwoven with its weft yarns.
Claims10
A composite paper-making forming fabric of reduced thickness and having improved fiber retention, comprising at least two complete weaves, each formed by its own set of warp and weft yarns and being interconnected by binder yarns which are separately interwoven with said two complete weaves, an upper one of said complete weaves constituting a paper-side weave which is comprised of flattened warp yarns having an aspect ratio of width to height of between 1.20 and 2.30 and interwoven with said weft yarns and having a plain weave, and a bottom one of said complete weaves constituting the machine-side weave which is comprised of flattened warp yarns having an aspect ratio of width to height of between 1.20 and 2.30;
- wherein said bottom weave has a mesh count of substantially half that of said upper weave;
- and wherein said upper weave has a machine-direction frame length which is less than that when round yarns are used;
- and further wherein the product of the warp mesh count and the width of the flattened warp strands in the upper weave is not more than about 0.65.
Dependencies are inferred from the claim text.