Particulate contamination control system enclosure

Claim 1

An improvement in a particulate contamination control system decontamination and closure for use with a negative air pressure work space, said work space is defined by a temporary wall means within a building, said wall means having at least one air inlet and outlet for exiting said work space, a filtered and air moving means for producing negative air pressure within said work space, said improvement comprising, an decontamination enclosure having multiple decontamination chambers in communication with said work space, a plurality of rigid doorway frames defining said enclosures, each rigid doorway frame having a spring urged solid door and a solid transom panel movably positioned within, said transom panel pivotally secured to said rigid doorway frame opposite said door, multiple depression areas within each of said rigid doorway frames, a HEPA filter in an opening in one of said depressions in each of said rigid doorway frames, a plurality of interconnecting frame support elements, and fastener means securing said support frame elements to said rigid doorway frames, each of said rigid doorway frames comprised of two identical frame panels having flared flanged edges secured to one another at their respective flared flanged edges, an adjustable weight assembly extending from one of said transom panels towards the work space adjacent said door, plastic film positioned around said rigid doorway frame and said interconnecting frame support elements, a plurality of elongated clips securing said plastic film to said flared flange edges.