20140179216 | Particle Containment Systems - A particle containment system includes an anteroom, an air-cleaning machine, and a vent. The anteroom includes a door and a first end configured to engage an opening in a building. The air-cleaning machine is coupled to a first port formed in a first wall of the anteroom. The air-cleaning machine is configured to provide filtered air to an interior of the anteroom or filter air provided from the interior of the anteroom. The vent is coupled to a second port formed in the first wall or a second wall of the anteroom. The vent is configured to close and seal when the door of the anteroom is opened. | 06-26-2014 |