Footwear article including circular knit structures

This invention describes a shoe upper made from two layers of circular-knit fabric. These two layers are designed to be coupled together, often by folding one around the other, to create a double-layered structure for the shoe. One version of the invention also includes a special functional layer, like a waterproof membrane, sandwiched between these two knitted layers.

Why it matters: Advances in automated 3D circular knitting technology since 2019 could make producing complex, integrated double-layer shoe uppers more efficient and precise, reducing waste. New material developments for waterproof membranes might also enhance the functional layer.

Status: Not in forceListed as no longer active. The specific reason is not in the record we hold.
How hard to build: SpecializedCircular knitting machinery, textile manufacturing

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