Patent ID: 6857956

Claim:
An airlock system utilizable with a protected Toxic Free Area (TFA) defined by an enclosure, said airlock system comprising: spaced-apart first and second door arrangements, each door arrangement having an entrance and an exit and being divided by partitions into a plurality of compartments; an airlock space coupled to, and bridging between, said first and second door arrangement; at least the exit of said second door being connectable to the protected TFA, while the first door arrangement having an entrance located outside said TFA, and a first additional door arrangement and airlock space coupled to the entrance of said first door arrangement and a second additional airlock space and a door arrangement coupled to said second door arrangement, so as to form a closed system having a sequence of n door arrangements alternating with −1 airlock spaces, wherein n is an integer number; the arrangement being such that there is no direct airflow from the entrance of said first door arrangement to the exit of said second door arrangement.