Processes for preparing flat-folded personal respiratory protection devices

  • US 6,715,489 B2
  • Filed: 09/19/2002
  • Issued: 04/06/2004
  • Est. Priority Date: 09/11/1995
  • Status: Expired due to Fees
First Claim
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1. A process for making personal respiratory protection devices to afford respiratory protection to a wearer comprisinga) forming a flat central portion, said central portion having at least a first edge and a second edge;

  • b) joining a flat first member to said central portion at the first edge of said central portion with a fold, bond, weld or seam, said fold, bond, weld or seam edge of said first member being substantially coextensive with said first edge of said central portion;

    c) joining a flat second member to said central portion at the second edge of said central portion with a fold, bond, weld or seam, said fold, bond, weld or seam edge of said second member being substantially coextensive with said second edge of said central portion;

    with the proviso that at least one of said central portion, first member and second member comprises filter media and said device being capable of being folded flat for storage and, during use, being capable of forming a cup-shaped air chamber over the nose and mouth of the wearer, and the unjoined edges of the central portion, first member and second member adapted to contact and be secured to the nose, cheeks and chin of the wearer and the outer boundary of the unjoined edges which are adapted to contact the nose, cheeks and chin of the wearer being less than the perimeter of the device in the flat folded storage state.

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