F26B 21/008

Arrangements {or duct systems, e.g. in combination with pallet boxes,} for supplying and controlling air or gases for drying solid materials or objects {the gas supply or exhaust being effected through hollow spaces or cores in the materials or objects, e.g. tubes, pipes, bottles the objects being flexible articles, which may be blown up by the drying gas, e.g. tubes, sausage casings }