Winding core clamp for photographic material spool - has annular part formed by sectors of rigid material on spool flange

摘要

The clamp secures a spool core to a spool flange core, using a lever to expand an annular part of the core from inside onto the spool core. The annular part (9) is made of rigid ring sectors, which can move in the flange to enlarge the dia. - An expander (7) responds to a control (6a) to engage between the end surfaces of two or more ring sectors.