Document zvpDamkNBD04DeppymMM3wd6

c 0 ? Y Chicago, Illinois July 29, 19^1 Mr. 0. 3. lewis Dear Oscar, Decently the Mine Safety Appliances Company representative was in to see us and left the attached literature regarding their new Comfo Metal Rume Respirator, He stated that this respirator could he worn beneath a welder's helmet and that it gives protection against all metal fumes, including lead fumes. We are forwarding this on to you, thinking that, if this is true, it might he valuable to us. How ever, we would suggest that its adaption to our use where men are doing hot work inside leaded gasoline tanks he checked direct with their laboratory, as well as our own. Very truly yours, (S) B. S. Crane PERMISSIBLE RESPIRATOR FOR FUMES APPROVAL 11 NO. 2139 ISSUED TO THE MINE SAFETY APPLIANCES CO. Pittsburgh, Pennsylvania, U. S. A. Approved for protection against the inhalation of fumes (solid dispersoids or particulate matter formed by the conden sation of vapors such as those from heated metals and other substances). The approved assembly consists of: BM-2101 facepiece | and BM-2139 filter. In making renewals or repairs, parts identical with those I furnished by the manufacturer under the pertinent approval shall | be maintained. CAUTION This respirator removes only dispersoids from the air It gives no protection against gases, vapors, or an insufficiency of oxygen, j Follow the manufacturer's instructions for fitting the respirator to the face, for cleaning or changing the filter, for cleaning the ' respirator, and for caring for it while not in use. The M.S.A. Comfo Metal Fume Respirator brings approved respiratory protection to workers in industry who are exposed to air contaminants arising from a variety of metals in molten con dition. This modern protection is combined with the long-proved wearing comfort and durability of the famous Comfo Respirator design--creat ing a product assured of wide acceptance whereever metal fume safety is a problem. Complete working freedom is permitted, and there is no interference with the use of goggles or any type of headgear. Iji every feature, this new M.S.A. product is worthy of the Comfo name--see the reverse of this page for the details! U. S. Bureau of Mines'' Approval No. 2139 KE 0022406 OVER - N22500.01 9 Filters of unique design--having high filtering efficiency against fine metal fumes, 9 Filter area more than double that of regular Comfo dust filters. 9 Protective filter containers of aluminum, guard long life of filters by keeping out grease and dirt. 9 All-rubber facepiece fits any face snugly and comfortably. 9 Foolproof U. S. Army-type exhalation valve, simple and positive in action. APPLICATIONS Toxic concentrations of metal fumes may be present in any operation or process where alloys or materials containing lead, zinc, cadmium, manganese, chromium, arsenic, and similar metals, or their compounds, are heated to temperaatures above their melting points. The M.S.A. Comfo Metal Fume Respirator will provide approved respiratory protection against these air con taminants. Examples of such operations are: Burning, welding, and riveting steel coated with lead paint; melting and pouring brass and bronze, also metals containing lead, cadmium, manganese, etc.; soldering and babbitting operations; smelting and refining of lead, zinc, and other toxic metals; melting and pouring type metals as in type foundries, linotype operations; welding and cutting galvanized iron. CONSTRUCTION The M.S.A. Comfo Metal Fume Respirator is extremely ___ ih _ J -- . I.*z JCI pj,^VlUC3 me Gcona.ijicr 4uauuco of strength, light weight and long service life. The twin side-placed filters, which assure low breathing resistance, are connected to a durable rubber facepiece with soft, flexible inturned edge--fitting any face with a comfortable air-tight seal. Filters are easily changed when necessary, and the standard U. S. Army inhalation valve is readily cleaned and always reliable. The rubber facepiece and aluminum filter containers may be washed and disinfected by regular methods at any time, without harm. Cat. No. CR-17060--M.S.A. Comfo Metal Fume Respirator complete with two sets of Fitters. Cat. No. CR-17034--Metal Fume Filters, 2 per box. MINE SAFETY APPLIANCES COMPANY v Braddock/ Thomas and Meade Sts. Pittsburgh, Pa. m -v Dlstrltt. Representatives. In Principal Cities . THE FILTER A uniquely-designed unit of high efficiency and durability, especially processed to combine maximum filtering effect with minimum breathing resistance. Extra-large area assures long life in service. EASILY MAINTAINED Maintenance of the respirator requires renewal of the filters at intervals depending upon conditions of use. Filter changes are easily and quickly made by any wearer--the lids of the filter cases are unscrewed, the old filters removed and new ones inserted, and the lids screwed firmly back in place. DEMONSTRATIONS GLADLY ARRANGED ON REQUEST K& 00 22 407