Dragerwerk Aktiengesellschaft

Drager Sicherheitstechnik Gmbh

Gerhold Muhmel

Wolfgang Bather

Wolfgang May

Carl-Ernst Van Der Smissen

Klaus Ammann

Mark Griesbach

Andre Freund

Rita Hamann

A scent cartridge (1) with a substrate (3), wherein the latter consists of porous particles of silica gel, activated carbon and/or aluminum oxide, which are impregnated with scents or active ingredients. The substrate (3) is fixed in a small cylindrical glass or aluminum tube (2) by means of wiremesh caps (4) made of metal or plastic. A membrane disk (6) is sealingly held on each flanged edge (5) of the small glass or aluminum tube (2) by means of a cap (7) each so that the membrane disks (6) can be punctured with needles or cannulae for releasing scents or active ingredients and an air or carrier gas flow controlled in a time-dependent manner is then admitted to the scent cartridge (1).

Scent cartridge

A gas filter media with a parallel layer structure, which comprise individual layers of adhesive and adsorbent particles, wherein the thermoplastic adhesive is solvent-free and is preferably based on polypropylene or polyethylene. Using the manufacturing process according to the present invention, it is possible to intentionally prepare gas filter media with adjustable packing density and pressure drop. The gas filter media according to the present invention can be used in respirator filters, room air filters, in ventilation filters for vehicles, or in apparatus filters.

Layered gas filter media

A respirator with an eye space (16), through which the air to be inhaled flows, and with an indicator located on a support for indicating the efficiency of the protective device on the respiration connection, which is to retain the pollutant from the environment. The pollutant indication takes place both in the case of leakages at the sealing zones of the mask or the respiration gas-carrying lines (compressed air respirator) and in the case of insufficient filter effect. To achieve this, the support (10) is arranged on an inner half mask (3) of the respirator, and an access surface, which is exposed to the pollutant and contains the indicator (18, 118), is in flow contact with the air being inhaled, which flows through the passage openings (12, 112) between the eye space (16) of the full mask (1) and the inner half mask space (4).

Respirator with inner half mask and pollutant indicator

Growing community of inventors

Hamberge, Germany

Gerhold Muhmel