Patent ID: 7234898
Filing Date: 2007-06-26
Classification: B65G

Abstract:
1. A pneumatic transmission system comprising: a first terminal; a second terminal; a transmission conduit connecting said first and second terminals in fluid communication with each other and having a first opening disposed at said first terminal and a second opening disposed at said second terminal; a first blower in fluid communication with said transmission conduit for creating a vacuum within said transmission conduit; a second blower in fluid communication with said transmission conduit for creating a vacuum within said transmission conduit; a first door connected to said first terminal for opening and closing said first opening; and a second door for opening and closing said second opening; wherein said transmission conduit comprises at least one venting port disposed within a sidewall of said transmission conduit at each of said first and second terminals, and wherein said first and second doors are movable to a position that closes respective said first and second openings but permit air to flow from outside said transmission conduit to an interior space of said transmission conduit through respective said at least one venting ports; wherein said transmission system transports a carrier within said transmission conduit between said first and second terminals.