Ventilating system for diazo process printing machines

Details Ventilating system for diazo process printing machines Ventilating system for diazo process printing machines

1988-05-16

1989-12-26

Griffin, Donald A.

Photocopying

Projection printing and copying cameras

With developing

354300, 55387, G03D 700, G03G 2730

Patent

active

048901369

ABSTRACT:
A ventilation system for a diazo copy machine of the type having an exposure chamber containing a source of illumination for exposure of an original image onto diazo copy material and developer chamber utilizing ammonia vapors to develop the image on the diazo copying material. The ventilation apparatus comprises separate means for ventilating the exposure chamber and for ventilating the developing chamber. Inlet means are provided in the exposure chamber for admitting ambient air thereinto, and outlet means are provided for venting hot air from the exposure chamber into the ambient environment. Vacuum means are provided for exhausting ammonia-laden air from the developing chamber, and an absorber chamber is provided which is in fluid communication therewith, cartridge means being disposed within the absorber chamber for selectively absorbing ammonia fumes. Ammonia-laden fumes are drawn from the developing chamber into the absorber cartridge and then exhausted into the ambient environment.

REFERENCES:
patent: 3147687 (1964-09-01), Halden
patent: 3727534 (1973-04-01), Low et al.
patent: 4153435 (1979-05-01), Fischer
patent: 4167319 (1979-09-01), Feitzinger et al.
patent: 4303329 (1981-12-01), Michlin
patent: 4512654 (1985-04-01), Feitzinger et al.
patent: 4786947 (1988-11-01), Kosugi et al.

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