Varndell Legal Group
Outer layer drumhead structure
 The present invention is to provide an improved outer layer drumhead structure and more particularly a drumhead structure to prevent from loosening while beating, and to keep the tonality of drumbeat be more tight and accurate, of which the structure is confined by means of the arrangement of a drumhead tetoron cloth and a frame of aluminum rod and aluminum groove channel in a way that the drumhead tetoron cloth is encircled between the aluminum rod and the aluminum groove channel with the outer layer of the drumhead tetoron cloth extending to a reasonable distance along the curved surface so as to provide a better construction against beating and also to give a better tonality while beating. 
G G
G10D G10D
inventional inventional
Cheng-Hui
Chang