Athletic shoe having a segmented upper
A shoe having an improved upper, and method of manufacture are presented herein. The upper is generally comprised of a plurality of non-stretch panels interlinked with at least one stretchable expansion joint. The stretchable expansion joint provides relative movement between the plurality of non-stretch panels such that the upper mimics the relative movement between the bone structures of a wearer's foot.
1. An article of footwear having a sole and an upper attached to the sole, wherein the upper comprises:
a forefoot portion;
a mid-section portion;
a rearfoot portion; and
an expansion joint comprising a first elongated portion for allowing relative movement between the forefoot portion and the mid-section portion corresponding to relative movement between the forefoot and midfoot of a wearer's foot during use and a second elongated portion for allowing relative movement between the mid-section portion and the rearfoot portion corresponding to relative movement between the midfoot and rearfoot of the wearer's foot during use, the first elongated portion and the second elongated portion intersecting at a portion of the upper proximate a top edge of the upper;
wherein the first elongated portion is disposed between the forefoot portion and the mid-section portion,
wherein the second elongated portion extends along adjacent linear edges of the mid-section portion and the rearfoot portion,
wherein the forefoot portion, the mid-section portion, and the rearfoot portion are formed of non-stretch materials; and
wherein the mid-section portion is in contact with the sole.
2. The article of footwear defined in claim 1 , wherein the expansion joint comprises a two-way expandable material.
3. The article of footwear defined in claim 1 , wherein the expansion joint comprises a four-way expandable material.
4. The article of footwear defined in claim 1 , wherein the expansion joint comprises a spandex material.
5. The article of footwear defined in claim 1 , wherein the expansion joint comprises a spandex material having a polyurethane coating.
6. The article of footwear defined in claim 1 , wherein the expansion joint is comprised of a material having a stretch retention of less than about 5%.
7. The article of footwear defined in claim 1 , wherein a portion of the expansion joint is about one half a millimeter to about ten millimeters wide.
8. The article of footwear defined in claim 1 , wherein a portion of the expansion joint is about two millimeters to about eight millimeters wide.
9. The article of footwear defined in claim 1 , wherein a portion of the expansion joint is about three millimeters to about four millimeters wide.
10. The article of footwear defined in claim 1 , wherein the first elongated portion and the second elongated portion intersect proximate to a foremost portion of the top edge of the upper.
11. The article of footwear defined in claim 1 , wherein the at least one expansion joint defines holes proximate the top edge portion of the upper.
12. The article of footwear defined in claim 1 , wherein the rearfoot portion is in contact with the sole.
13. The article of footwear defined in claim 1 , wherein the expansion joint comprises at least one end in contact with the sole.
14. The article of footwear defined in claim 1 , wherein the expansion joint comprises at least two ends in contact with the sole.
15. An article of footwear having a sole and an upper attached to the sole, wherein the upper comprises:
a forefoot portion;
a mid-section portion;
a rearfoot portion; and
an expansion joint portion comprising a first elongated portion and a second elongated portion, the first elongated portion and the second elongated portion intersecting at a portion of the upper proximate to the sole,
wherein the first elongated portion is disposed between the forefoot portion and the mid-section portion,
wherein the second elongated portion is disposed between the mid-section portion and the rearfoot portion,
wherein the forefoot portion, the mid-section portion, and the rearfoot portion are formed of non-stretch materials,
wherein the mid-section portion has a triangular shape, and
wherein the expansion joint is configured to allow relative movement among the forefoot portion, the mid-section portion, and the rearfoot portion that corresponds to relative movement between bone structures of a wearer's foot.
16. The article of footwear defined in claim 15 , wherein the expansion joint further comprises a third elongated portion disposed along a top edge portion of the upper that intersects with ends of both the first elongated portion and the second elongated portion.
17. The article of footwear defined in claim 15 , wherein the triangular shape has two vertices proximate a top edge portion of the upper.
18. The article of footwear defined in claim 15 , wherein the at least one expansion joint defines holes proximate the top edge portion of the upper.