Wand purging for electrostatic charging system in flash spinning

Details Wand purging for electrostatic charging system in flash spinning Wand purging for electrostatic charging system in flash spinning

1996-04-19

1998-05-12

Davis, Robert

Plastic article or earthenware shaping or treating: apparatus

Shaping orifice and downstream work contacting gaseous...

Orifice for filaments or fibers

4251748E, 425225, B29C 3700

Patent

active

057501521

ABSTRACT:
This invention relates to a method and apparatus for sweeping dust and debris from the needles of a wand which is for applying an electrostatic charge to a plexifilamentary film-fibril web. The needles of the wand tend to acquire dust and debris from the polymer and by the present invention the dust and debris are efficiently swept away by a gaseous fluid flow over the needles preferably so that the fluid passes circumferentially over the needles through an annular passage.

REFERENCES:
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patent: 3319309 (1967-05-01), Owens
patent: 3320479 (1967-05-01), Owens
patent: 3387326 (1968-06-01), Hollberg et al.
patent: 3535588 (1970-10-01), Crook, III
patent: 3565979 (1971-02-01), Palmer
patent: 3578739 (1971-05-01), George
patent: 3689608 (1972-09-01), Hollberg et al.
patent: 3851023 (1974-11-01), Brethauer et al.
patent: 3860369 (1975-01-01), Brethauer et al.
patent: 4148595 (1979-04-01), Bednarz
patent: 4554207 (1985-11-01), Lee

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