Apparatus for the elimination of noxious ammonia fumes associated with diazo copiers includes a plenum chamber disposed about the output aperture of the machine developer chamber. Vacuum means are provided to draw the ammonia laden air out of this chamber. Preferably this apparatus is used in conjunction...http://www.google.fr/patents/US4059409?utm_source=gb-gplus-shareBrevet US4059409 - Apparatus for eliminating ammonia fumes emanating from diazo copiers
Apparatus for eliminating ammonia fumes emanating from diazo copiers
