Footwear strobel with bladder having grooved flange and method of manufacturing
A strobel for an article of footwear comprises a polymeric bladder that defines an interior cavity. The polymeric bladder is configured to retain a fluid in the interior cavity. The polymeric bladder has a peripheral flange extending around at least a portion of a perimeter of the interior cavity. The peripheral flange defines a groove extending along the peripheral flange. The polymeric bladder may include a first polymeric sheet bonded to a second polymeric sheet at the peripheral flange and joined to the second polymeric sheet at a plurality of interior welds. Methods of manufacturing a strobel and manufacturing footwear are included.
1. An article of footwear comprising:
a strobel including:
a polymeric bladder defining an interior cavity and configured to retain a fluid in the interior cavity, the polymeric bladder having a peripheral flange extending around at least a portion of a perimeter of the interior cavity;
wherein:
the peripheral flange defines a groove extending along the peripheral flange;
the peripheral flange has a first weld and a second weld spaced apart from the first weld;
the first weld and the second weld extend lengthwise along the peripheral flange;
the groove extends lengthwise along the peripheral flange between the first weld and the second weld;
the first weld is inward of the groove; and
the second weld is outward of the groove.
2. The article of footwear of claim 1 , further comprising:
an upper; wherein the strobel is secured to the upper.
3. The article of footwear of claim 2 , wherein the strobel is secured to the upper by a series of stitches extending through the peripheral flange in the groove.
4. The article of footwear of claim 2 , further comprising:
a midsole secured to at least one of the upper or the polymeric bladder.
5. The article of footwear of claim 3 , further comprising:
a lasting component disposed at the peripheral flange; wherein the series of stitches further extend through the lasting component.
6. The article of footwear of claim 1 , wherein:
the polymeric bladder includes a first polymeric sheet and a second polymeric sheet;
the first polymeric sheet is bonded to the second polymeric sheet at the peripheral flange; and
the first polymeric sheet is joined to the second polymeric sheet at a plurality of interior welds.
7. The article of footwear of claim 6 , wherein:
the interior welds are arranged in a pattern of rows and columns, with the rows spaced in a longitudinal direction of the strobel and the columns spaced in a transverse direction of the strobel;
the interior welds of any two consecutive rows are offset from one another and the interior welds of alternate rows are aligned with one another; and
the interior welds of any two consecutive columns are offset from one another and the interior welds of alternate columns are aligned with one another.
8. The article of footwear of claim 7 , wherein any two adjacent interior welds in one of the rows and an interior weld in a consecutive one of the rows and in a column between the two adjacent interior welds are positioned to define corners of an equilateral triangle.
9. The article of footwear of claim 6 , wherein at least a majority of the interior welds are circular and have an equal diameter.
10. The article of footwear of claim 1 , wherein the polymeric bladder has a locating feature that is at least one of a notch in an outer edge of the peripheral flange, a protrusion at the outer edge of the peripheral flange, an aperture in the polymeric bladder, or a marking on the polymeric bladder.
11. The article of footwear of claim 1 , wherein:
the groove, the first weld, and the second weld are on a distal surface of the peripheral flange;
the peripheral flange defines an additional groove extending along a proximal surface of the peripheral flange;
the peripheral flange has an additional first weld and an additional second weld spaced apart from the additional first weld on the proximal surface of the peripheral flange;
the additional first weld and the additional second weld extend lengthwise along the peripheral flange, and the additional groove extends lengthwise along the peripheral flange between the additional first weld and the additional second weld;
the additional first weld is inward of the additional groove; and
the additional second weld is outward of the additional groove.
12. The article of footwear of claim 1 , wherein:
the peripheral flange includes a first ridge protruding at an outer surface of the peripheral flange between the first weld and the groove; and
the peripheral flange includes a second ridge protruding at the outer surface of the peripheral flange between the second weld and the groove.