Firework, consisting of a cylindrical paper sleeve

摘要

A firework consists of a cylindrical paper sleeve contg. an explosion chamber with an explosive charge, and two closure members, in each end of the sleeve, as well as a fuse. Each end of the sleeve has a cardboard disc (7,8) which is held by a cylindrical member (12) on the side facing away from the explosion chamber. The explosion chamber (3) is filled with air (11).