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Patent 5839448
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Document Number
US Patent 5839448
Issued Date
November 24, 1998
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Abstract
Cigarette filters are disclosed which comprise entangled continuous filaments of lyocell. The filaments may be entangled for example by hydroentangling a web which comprises one or more layers of lyocell filaments in spread tow form or by directing radial or circumferential water jets at a tow of lyocell filaments in rod form.
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Number of Claims:
12
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Published
November 24, 1998
Application Number
08/765,477
Filed
December 20, 1996
US Classification
131/331   131/334
Int'l Classification
A24D   3/00   (20060101)   A24D   3/10   (20060101)   D04H   1/46   (20060101)   D01F   2/00   (20060101)  
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Priority Data
Jun 20, 1994 [GB] 9412311
USPTO Field of Search
131/331   131/334   131/347   131/358   131/353   131/369   131/370   131/371   131/372   131/373   131/374   131/375   425/71   8/116.4  
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