Footwear Upper Thread Structural Elements for Mass Reduction

The patent applies local quality by using a single base layer material with uniform stretch properties throughout, and selectively adding thread structural elements only in specific zones where stretch-resistance is needed. The threads are oriented in different patterns (parallel in some zones, crossed in others) to provide localized reinforcement without adding material to areas that don't require it, thus achieving area-specific property modification without increasing overall mass.

The patent extracts the stretch-resistance function from multiple material layers and consolidates it into a single thread structural element system. Instead of using different materials with inherent stretch-resistance properties, the invention removes the need for multiple layers and achieves the same effect through strategically placed threads on a single base layer, eliminating superfluous material.

The patent segments the upper surface into distinct zones (first zone, second zone, third zone) with different thread orientation requirements. Each zone is treated independently with appropriate thread patterns: the second zone has parallel threads for uniform stretch-resistance, while the third zone has crossed threads for enhanced reinforcement. This segmentation allows complex reinforcement needs to be broken down into manageable, standardized patterns.

The patent changes the orientation parameter of threads to achieve different functional effects in different zones. By varying the thread angle and orientation rather than changing material properties or adding complex structural elements, the invention achieves tailored stretch-resistance with relatively simple implementation. The parameter change approach maintains base layer uniformity while achieving functional differentiation.