Apparatus for eliminating ammonia fumes emanating from diazo...

Details Apparatus for eliminating ammonia fumes emanating from diazo... Apparatus for eliminating ammonia fumes emanating from diazo...

B - Operations, Transporting

01

D

165/28, 23/419,

B01D 53/34 (2006.01) B01J 8/04 (2006.01) C01C 1/12 (2006.01) G03D 7/00 (2006.01)

Patent

CA 1126487

APPARATUS FOR ELIMINATING AMMONIA FUMES EMANATING FROM DIAZO COPIERS ABSTRACT OF THE INVENTION Apparatus for the elimination of noxious ammonia fumes associated with diazo copiers includes a plenum chamber disposed about the output aper- ture 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 with a novel filter connected between the chamber and the vacuum means. The filter comprises a filter body of a material such as corrugated paper having a plurality of longitudinal substantially parallel channels, the walls of which are impregnated with a material, such as phosphoric acid, which will react with ammonia to generate odorless end products. A granular layer impregnated with such a material may be disposed in contact with the output end of this filter body.

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