Cellulose acetate tow and method of making same

Plastic and nonmetallic article shaping or treating: processes – With twining – plying – braiding – or textile fabric formation

Reexamination Certificate

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C264S130000, C264S168000, C264S187000, C264S207000, C264S211120, C264S211140, C264S234000

Reexamination Certificate



In the manufacture of a fiber tow, particularly cellulose acetate tow, a stuffer box crimper has one roller adapted to induce crimp into the tow. This roller induces crimp by preferentially weakening a portion of the tow. This roller has an axially grooved surface. This roller may be located in the stuffer box crimper or before the stuffer box crimper.

patent: 3120692 (1964-02-01), Crawford et al.
patent: 3305897 (1967-02-01), Meibohm
patent: 3353239 (1967-11-01), Heijnis
patent: 5225277 (1993-07-01), Takegawa et al.
patent: 5427852 (1995-06-01), Teufel et al.
patent: 5591388 (1997-01-01), Sellars et al.
patent: 5618620 (1997-04-01), Takegawa et al.
patent: 56-53223 (1981-05-01), None
patent: 2964191 (1993-07-01), None
patent: WO 02/087366 (2002-11-01), None


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