Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Extrusion molding
Patent
1997-01-31
1998-06-09
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Extrusion molding
264 70, 264103, 2642108, 264469, 264555, D01D 508, D04H 300
Patent
active
057628572
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.
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Anderson Mark Allen
Jones Mark Francis
Weng Jian
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