发明名称 |
Wand purging for electrostatic charging system in flash spinning apparatus |
摘要 |
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.
|
申请公布号 |
US5750152(A) |
申请公布日期 |
1998.05.12 |
申请号 |
US19960635314 |
申请日期 |
1996.04.19 |
申请人 |
E. I. DU PONT DE NEMOURS AND COMPANY |
发明人 |
POWERS, JR., ERVIN TOWNSEND;RUDISILL, EDGAR NORTH |
分类号 |
D01D5/11;(IPC1-7):B29C37/00 |
主分类号 |
D01D5/11 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|