High-speed spun-bond production of non-woven fabrics

Textiles: weaving – Fabrics – Drier felts

Reexamination Certificate

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Details

C139S3830AA, C139S38300A, C162S358200, C442S205000

Reexamination Certificate

active

07578317

ABSTRACT:
In combination with a high-speed spun-bond apparatus, rather than using a circulating sieve belt for collecting the stretched filaments and forming the web, a fabric having a 4-shed double layer with support shute weave design is used. This fabric is commonly referred to as a 4B weave and 4B weave with stuffer in center. In general, the fabric has a permeability ranging from 400 to 800 cfm with a woven or pin seam where the seam permeability and caliper varies only slightly with respect to the rest of the fabric.

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International Search Report issued by European Patent Office for corresponding international application PCT/US02/34302, mailed Mar. 6, 2003.

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