1977-04-07
1979-09-11
Hix, L. T.
34140, 34155, G03D 700
Patent
active
041673190
ABSTRACT:
In a diazo-type copying apparatus, an improvement to prevent external leakage of gaseous ammonia to the atmosphere. The apparatus comprises a developing chamber, transport means within the chamber, means for introducing ammonia gas to the chamber, a first enclosure enclosing the chamber for sealing it from the atmosphere, a second enclosure containing the first enclosure as well as a perforated vacuum tube for collecting ammonia gases escaping from the first enclosure as well as for scrubbing ammonia gases from developed copies and exhausting the gases either to a liquid ammonia absorbing solution, a filter containing an ammonia absorbing solution, a cartridge containing ammonia absorbing pellets or a catalytic converter thereby preventing the ammonia gases from contaminating the atmosphere.
REFERENCES:
patent: 1760149 (1930-05-01), Langsner
patent: 2240409 (1941-04-01), Morse
patent: 3467491 (1969-09-01), Hardison
patent: 3679369 (1972-07-01), Hashimoto et al.
patent: 3710548 (1973-01-01), Coughlin
patent: 3720150 (1973-03-01), Hurtig et al.
patent: 3900862 (1975-08-01), Bennett
patent: 4059409 (1977-11-01), Barto et al.
Feitzinger Eduard
Mastroianni Emilio G.
GAF Corporation
Hix L. T,.
Kehm Walter C.
Mathews Alan
Mohr J. Gary
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