A method for forming a bladder comprises providing a mold including a chamber wall having a first height and a cavity wall having a second height. The cavity wall is surrounded by the chamber wall and defines a plurality of cavities. A first sheet, a second sheet, and a gasket are provided to the mold, whereby the gasket is disposed adjacent to at least one of the first sheet and the second sheet. The mold is moved such that a peripheral portion of the at least one of the first sheet and the second sheet and the gasket are compressed by the chamber wall. A first pressure is provided between the first sheet and the second sheet through the gasket to form a plurality of chambers, and the mold is moved to a second position to seal the first pressure between the first sheet and the second sheet.

Hot melt sequins and methods of applying these sequins are disclosed. A method of attaching two components includes stitching a hot melt sequin to one of the components and heating the hot melt sequin to bond the two components together. Sequins can also be applied to articles to create structural elements such as heel counters, toe covers, and lace cages. Sequins can be applied in 1D, 2D, and 3D patterns as well as in dispersive patterns. Sequins can be applied to vary the abrasion properties of a portion of an article.

Hot melt sequins and methods of applying these sequins are disclosed. A method of attaching two components includes stitching a hot melt sequin to one of the components and heating the hot melt sequin to bond the two components together. Sequins can also be applied to articles to create structural elements such as heel counters, toe covers, and lace cages. Sequins can be applied in 1D, 2D, and 3D patterns as well as in dispersive patterns. Sequins can be applied to vary the abrasion properties of a portion of an article.

An elastic strain sensor can be incorporated into an artificial skin that can sense flexing by the underlying support structure of the skin to detect and track motion of the support structure. The unidirectional elastic strain sensor can be formed by filling two or more channels in an elastic substrate material with a conductive liquid. At the ends of the channels, a loop port connects the channels to form a serpentine channel. The channels extend along the direction of strain and the loop portions have sufficiently large cross-sectional area in the direction transverse to the direction of strain that the sensor is unidirectional. The resistance is measured at the ends of the serpentine channel and can be used to determine the strain on the sensor. Additional channels can be added to increase the sensitivity of the sensor. The sensors can be stacked on top of each other to increase the sensitivity of the sensor. In other embodiments, two sensors oriented in different directions can be stacked on top of each other and bonded together to form a bidirectional sensor. A third sensor formed by in the shape of a spiral or concentric rings can be stacked on top and used to sense contact or pressure, forming a three dimensional sensor. The three dimensional sensor can be incorporated into an artificial skin to provide advanced sensing.

An adaptive fluid system for an article of footwear is disclosed. The adaptive fluid system includes a fluid chamber that provides cushioning and shock absorption for a foot. The adaptive fluid system includes an adjustable pressure regulating valve that may be used to control the pressure of the fluid chamber. The adaptive fluid system includes a valve that prevents fluid from escaping from a fluid chamber during use.

Described are shoes for ball sports including an upper having an outer surface. An actuator is configured to change at least one surface property of a portion of the outer surface of the upper, and a sensor is configured to be sensitive to movements of the shoe. A processing unit is connected to the actuator and the sensor and configured to process sensor data retrieved from the sensor and to cause the actuator to change the at least one surface property of the portion of the outer surface of the upper if a predetermined event is detected in the sensor data.

An article of footwear includes a sole, an upper, and an inflatable bladder disposed on the upper. The upper includes a leno woven fabric having a continuous leno weave pattern of a plurality of warp yarns extending in a longitudinal direction and a plurality of weft yarns extending in a transverse direction. The weft yarns include an elastic material.

Foot support systems include a fluid flow regulator and/or valve that: (a) can operate as a stop valve to stop transfer of fluid between a first fluid container and a second fluid container, (b) can open in a controlled manner to allow transfer of fluid from the second fluid container to the first fluid container, (c) can open to equalize pressure in the first and second fluid containers, and (d) can act as a check valve to enable flow of fluid from the first fluid container to the second fluid container when/if gas pressure in the first container exceeds that in the second container by a predetermined amount. Additional features relate to fluid flow control systems and methods, systems and methods for changing and controlling the crack pressure of a valve (e.g., a check valve), and/or systems and methods for matching foot support pressure features in two different sole structures.

An air bladder boot fitting device facilitates snug fitting to prevent unintended removal of a boot. The device includes a boot having a sole and an upper coupled to and extending upwardly from the sole. The upper includes a shaft section extending downwardly from an open upper edge. A bladder is coupled to the upper and positioned within an interior of the boot. The bladder extends along the shaft section for securing a foot within the boot when the bladder is inflated. A bulb valve is coupled to the bladder for inflating the bladder.

An article of footwear includes an adjustable element. The adjustable element includes a bladder that defines an interior void. A compressible component that is disposed within the interior void and is operable between an expanded state and a contracted state. The adjustable element also includes a lock strip including a first end anchored at a first location within the bladder and a second end disposed at an opposite end of the lock strip than the first end. A lock receives the lock strip and is operable between a locked state restricting movement of the lock strip relative to the bladder and an unlocked state permitting movement of the lock strip relative to the bladder.