NIKE, Inc.
Bladder element formed from three sheets and method of manufacturing a bladder element

Abstract:

A method of manufacturing a bladder element comprises forming at least one of a first, a second, and a third polymeric sheet to have a contoured surface profile. The first, the second, and the third polymeric sheets are stacked so that the second polymeric sheet is between the first polymeric sheet and the third polymeric sheet. The method comprises applying fluid pressure between the first polymeric sheet and second polymeric sheet, between the second polymeric sheet and the third polymeric sheet, or between both, forcing a first surface of the second polymeric sheet into contact with an inner surface of the first polymeric sheet, or a second surface of the second polymeric sheet into contact with an inner surface of the third polymeric sheet, or both. A bladder element is also disclosed.