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The High Integrity versions of the AXON 2 , 5, 10 and 20 'Hot - Air' Continuous Sealers have been designed specifically for the closure of plastic bags and sacks hygiene and / or resistance to harsh environments are of prime importance. In Operation, a continuous stream of precision heated ' Hot Air' is directed simultaneously to both sides of the neck of the plastic bag as it is fed through the sealing head. The plastic becomes semi-molten and is welded firmly by crimping wheels to form a permanent air - tight seal. Air temperature is regulated by an ' intelligent' P.I.D. Controller to ensure seal integrity