Abstract: A method for manufacturing a gas mask canister using a HEPA filter media having plastic separating plates inserted into between HEPA filter media at certain intervals. The HEPA filter, impregnated activated carbon, and a pre-filter are accommodated within a cylinder. The cylinder is inserted into a canister having an upper portion and a lower portion detachably coupled together. The impregnated activated carbon, the plastic separating plates and the casing of the canister can be reused, and the rest of elements are burned. A vinyl coating sheet is peeled off from the canister after each use. An indexing tab for recording the number of times of peeling is attached on each of vinyl coated sheets, so that the number of uses can be known.

Abstract: A method and an apparatus using a fluidized bed type adsorbing tower for manufacturing a TEDA-impregnated active carbon which is used for removing toxic materials from a fluid. A base active carbon is dried to remove the water component, and the dried active carbon is filled into the fluidizing type adsorbing tower and to above a sieve plate. A TEDA reagent is injected into a TEDA vapor generating vessel. A heated air is supplied into the TEDA vapor generating vessel so as to generate a TEDA vapor mixed with the heated air. The heated air mixed with the TEDA vapor is supplied into the lower portion of the fluidized bed type adsorbing tower so as to make the base active carbon fluidized. Thus the TEDA vapor is impregnated into the active carbon within the fluidized carbon bed.