Patent ID: 8735756
Filing Date: 2014-05-27
Classification: A61L,B07C,G01N,G05B,Y10S

Abstract:
1. A threat detection system comprising: a facility including a mail processing room located in the facility and a positive pressure zone located external to the facility; a ventilation system coupled to the mail processing room; a first interlocking door-less area located in the mail processing room, wherein the first interlocking door-less area includes a first area pressure zone that is negative with respect to the positive pressure zone external to the facility; a second interlocking door-less area located in the mail processing room, wherein the second interlocking door-less area includes a second area pressure zone that is negative with respect to the first area pressure zone, wherein the ventilation system includes a local ventilation system to supply air to the second interlocking door-less area; and a third interlocking door-less area located in the mail processing room, wherein the third interlocking door-less area includes a third door-less area pressure zone that is negative with respect to the positive pressure zone external to the facility and positive with respect to the second area pressure zone, wherein the first area pressure zone, the second area pressure zone, and the third area pressure zone result in air within the facility or entering the facility to flow into the second area, and wherein the ventilation system includes a global ventilation system having a dedicated input to the first interlocking door-less area, a dedicated input to the second interlocking door-less area, and a dedicated input to the third interlocking door-less area.