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Free edge

  A free edge pierces the one (In a word, the material besides the vibration board can be used) that processes only the edge by another material and bonded, and is an edge of the main current now. A free edge is called alias UL edge (ultra linear edge).

  The material used for a free edge has leather, the polyurethane, rubber, and the cloth, etc.Especially, because [puriuretan] is longevity and becomes tattered in around '10, the maintenance of the Cho substitution is needed.

  There is various shape in the edge and it is the one example that enumerates below. Flat edge, �� edge, U edge, V edge, [koruge-shon;ejji], double edge, [gyaza-doejji], and edge with radial edge, cylinder edge, and pause.