| 摘要 |
A closure of reinforced elastomeric material having layers or plies of reinforcing means bonded or secured to one or more reinforcing members in the outer periphery of the closure wherein each layer or ply of reinforcing means is comprised of a plurality of strips of fabric, at least one strip of fabric having the ends wrapped and secured about one or more reinforcing members in the outer periphery and covering the center of the closure or diaphragm and the remaining strips of fabric having each end thereof wrapped and secured about one or more reinforcing members in the outer periphery and extending along lines which are chords of a circle formed by a reinforcing member such that the closure of diaphragm has each area thereof reinforced by at least one strip of fabric. |
