Textiles: braiding – netting – and lace making – Processes and products – With material incorporated in diverse ways
Reexamination Certificate
2001-01-12
2001-09-04
Calvert, John J. (Department: 3765)
Textiles: braiding, netting, and lace making
Processes and products
With material incorporated in diverse ways
C087S009000, C057S230000
Reexamination Certificate
active
06283004
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a shoelace and, more specifically, to such a shoelace that provides a high friction resistance against slipping when installed in the shoe and tied up.
Regular cylindrical shoelaces are commonly comprised of a center core and a tube of braided fabric covered on the periphery of the center core. Weaving together weft threads and warp threads of equal number and size forms the braided fabric. Because the number and size of the weft threads are same as the warp threads, the outer wall of the tube of braided fabric is relatively smooth. When the two distal ends of this structure of shoelace are tied up, less friction resistance is produced between the two distal ends of the shoelace, and the ends of the shoelace tend to loosen.
SUMMARY OF THE INVENTION
It is the main object of the present invention to provide a shoelace, which has a protruded portion spirally extended along the length for positive positioning after installation in the shoe. According to the present invention, weaving together base threads and stopper threads forms the tube of braided fabric of the shoelace around the center core. The number and diameter of the stopper threads are greater than the base threads so that a protruded portion is formed in the tube of braided fabric and extended in a spiral manner after the formation of the braided fabric.
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Calvert John J.
Pro-Techtor Inter-national Services
Taiwan Paiho Limited
Welch Gary L.
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