think and mountings of films for printing and / or entwicklungsmaschinen

摘要

A device, for supporting and fixing spools 23, of photographic material which can be inserted into printing and/or developer machines, has a hollow shaft 5 into which a radially expansible mechanism 7, 9, 11 is inserted, and a core 19, which can be threaded onto the shaft 5, and can be locked by said mechanism during rotation of the shaft. The core (19) has a sleeve (22) made of a resilient material, and the expansible mechanism (7, 9, 11) is provided with at least two small rigid blocks (12) which are retained inside the shaft (5) in a rest position and which are able to compress radially the inner surface of the sleeve (22), in an expanded condition, so as to have the shaft (5), the core (19) and the spool (23) locked to each other independently of the angular position of threading of the core (19) on the shaft (5). IMAGE