Large diameter throwing disk is made from cloth held rigid by curved sections of tube threaded through hem around its edge, tension of cloth being controlled by elastic band threaded through hem around central hole

摘要

The large diameter throwing disk is made from cloth (2) and is held rigid by curved sections of tube (1) threaded through a hem around its edge. The tension of the cloth can be controlled by an elastic band (3) threaded through a hem around a central hole.