Plastic and nonmetallic article shaping or treating: processes – Direct application of electrical or wave energy to work – Extrusion molding
Reexamination Certificate
2002-12-20
2009-02-10
Tentoni, Leo B (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Direct application of electrical or wave energy to work
Extrusion molding
C264S103000, C264S210800, C264S555000
Reexamination Certificate
active
07488441
ABSTRACT:
Described herein are improvements to processes and equipment for the manufacture of nonwoven webs useful in numerous applications including personal care, protective apparel, and industrial products. The fiber and/or filaments used to form the nonwoven fabric are deposited on a forming surface in a controlled orientation using application of an electrostatic charge to the fibers and/or filaments in combination with directing them to an electrode deflector plate while under the influence of the charge. The plate may be made up of teeth with a separation and angle orientation that are selected in accordance with the desired arrangement of the fibers and/or filaments in the nonwoven web. As a result, properties of the web such as relative strengths in the machine direction and cross-machine direction can be controlled. The charging of the pins is controlled so that not all pins remain at maximum charge during a cycle with the result that extended run times may be obtained.
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Polymer Blends and Composites, John A. Manson and Leslie H. Sperling, copyright 1976, Plenum Press, ISBN-0-306-30831-2, pp. 273-277.
Baldy Robert James
Haynes Bryan David
Hulslander Douglas Jay
Schiffer Daniel Kenneth
Dority & Manning P.A.
Kimberly--Clark Worldwide, Inc.
Tentoni Leo B
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