The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 1998
Filed:
Jan. 31, 1997
Applicant:
Inventors:
Jian Weng, Charlotte, NC (US);
Mark Francis Jones, Mooresville, NC (US);
Mark Allen Anderson, Charlotte, NC (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01D / ; D04H / ;
U.S. Cl.
CPC ...
264465 ; 264 70 ; 264103 ; 2642108 ; 264469 ; 264555 ;
Abstract
A method and apparatus is provided to cause deflection or oscillation of a bundle of spun thermoplastic filaments. A pulsing electrostatic charge and optionally an additional constant charge is applied to attenuated filaments prior to deposit of the filaments on a conveyor in the form of a web. Adjacent sections of filaments may be charged with different phases, and multiple pulsed charges may be applied. The pulsed charges cause movement or oscillation of the filaments resulting in better web uniformity.