Rechargeable gas cleaners

Claim 1

A rechargeable gas cleaner comprising a cylindrical casing open at both ends and a cartridge fitting within the casing and containing cleaning material, releasable means on said casing for retaining said cartridge therein, said casing having inlet and outlet ports in the interior of its cylindrical wall and said cartridge having cooperating inlet and outlet ports in its cylindrical wall and, for replacing the said cartridge, a fresh identical cartridge enclosed in a storage capsule in which it is sealed from the atmosphere and which is adapted to be applied end to end to the casing to form a continuation of it so that the new cartridge can be pushed from the storage capsule into the casing, pushing out the old cartridge through the opposite end, said capsule comprising a rigid head at one end including means attaching said capsule to one end of the casing and a flexible bag connected to said rigid head and enclosing the major part of the new cartridge so as to enable it to be pushed into the casing by collapsing the bag while sealing it from the outer atmosphere, the head of the storage capsule incorporating a readily breakable diaphragm which completes the sealing of the new cartridge during storage but can be readily broken by pushing on the cartridge and will then be carried completely through the casing and out at the other end.