Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Rod – strand – filament or fiber
Reexamination Certificate
2003-03-17
2004-02-24
Edwards, N. (Department: 1774)
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Rod, strand, filament or fiber
C428S121000, C383S067000, C383S107000, C383S109000, C264S414000, C139S097000
Reexamination Certificate
active
06696152
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a polypropylene wicker. More particularly, the present invention relates to a plurality of polypropylene wicker which is used for weaving a bag.
A conventional polypropylene wicker which is used for weaving a bag has a single layer. When the bag contains a plurality of heavy articles, the bag is easily broken.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a polypropylene wicker which has at least three folding layers to reinforce a bag made of a plurality of polypropylene wickers.
Accordingly, a polypropylene wicker comprises a polypropylene woven yarn having at least three folding layers.
In accordance with a preferred embodiment of the present invention, a method of preparing a plurality of polypropylene wickers comprises a polypropylene film passing through a chill roller to decrease a temperature of the polypropylene film, and a cutting roller having a plurality of cutting blades to cut the polypropylene film into a plurality of polypropylene bands. Each of the polypropylene bands passes through a U-shaped mold roller set and a folding mold, the folding mold folding the corresponding polypropylene band into three layers, a folding roller folding the corresponding polypropylene band completely to form a polypropylene woven yarn, and the polypropylene woven yarn passing through an extension molding roller set and a setting roller set.
REFERENCES:
patent: 5615713 (1997-04-01), Benesi
patent: 6368543 (2002-04-01), Lin
Edwards N.
Kamrath Alan D.
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