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    • 9. 发明公开
    • MIDSOLE WITH GRADED RESPONSE
    • EP4233615A3
    • 2023-09-20
    • EP23176103.2
    • 2018-05-18
    • NIKE Innovate C.V.
    • CASE, PatrickELDER, Zachary M.PEYTON, Lee D.
    • A43B3/00A43B13/02A43B13/20A43B13/22A43B13/12
    • A sole structure for an article of footwear includes a midsole having four stacked polymeric sheets bonded to one another at a peripheral flange and defining a first cushioning layer having a first sealed chamber, a second cushioning layer having a second sealed chamber, and a third cushioning layer having a third sealed chamber, each sealed chamber retaining gas in isolation from each other sealed chamber. Bonds between adjacent ones of the four stacked polymeric sheets are arranged such that the third cushioning layer is stacked above the first cushioning layer with the second cushioning layer bordering both the first cushioning layer and the third cushioning layer, and the second sealed chamber of the second cushioning layer bordering the peripheral flange. The peripheral flange extends along and establishes a periphery of the midsole at both a medial side of the midsole and a lateral side of the midsole from a forefoot region of the midsole to a heel region of the midsole. The second sealed chamber borders the peripheral flange along the medial side and along the lateral side. The first cushioning layer has a first stiffness, the second cushioning layer has a second stiffness greater than the first stiffness, and the third cushioning layer has a third stiffness less than the second stiffness.