Method of manufacturing a respirator cartridge seal

A method for sealing a respirator cartridge with a filter formed from a filter media enclosed in a container forming said cartridge comprising:

• providing a nozzle having an opening connected to a conduit connected to a source of sealant;
• moving said nozzle downwardly and then toward the interior periphery of the cartridge in order to eject sealant into the peripheral region of the cartridge;
• ejecting a sealant from said nozzle directly toward the wall of said container with sufficient force to reach an area adjacent the wall of said container and said filter media;
• and,
• drawing sealant back into said nozzle from the opening after the ejecting process.

A method for sealing filter media into a respirator cartridge comprising:

• supporting a cartridge having filter media therein;
• rotating the support for said cartridge;
• moving a nozzle into the cartridge for injecting sealant;
• injecting sealant from said nozzle connected to a source of sealant into said cartridge directly toward an interior peripheral region between the filter media and the outer wall of said cartridge;
• drawing back sealant into said nozzle to prevent residual flow after injecting a desired amount of sealant;
• and,
• withdrawing said nozzle after injection of sealant from said nozzle.