| 摘要 |
The substrate (3) comprises particles of porous silica gel, aluminum oxide and/or activated carbon. It is impregnated with perfume or active materials. The substrate is held in a closed, gas-filled, 1-30 cm<3> volume, through which gas is allowed to flow An Independent claim is included for time-controlled delivery of scent, preferably using air or an inert gas carrier.
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| 申请人 |
DRAEGER SICHERHEITSTECHNIK GMBH, 23560 LUEBECK, DE |
发明人 |
MUEHMEL, GERHOLD, DR., 23619 HAMBERGE, DE;GRIESBACH, MARK, 23611 BAD SCHWARTAU, DE;HAMANN, RITA, 23556 LUEBECK, DE |
