| 摘要 |
This invention relates to an improvement in an apparatus for ammonia feed in copying equipment with a cold trap, for freezing out ammonia and water from air extracted from the immediate vicinity of a developing chamber, in particular from pre-chambers, together with a rectifying column for releasing ammonia from the frozen-out ammonia-water mixture and recycling the gaseous ammonia into the developing chamber, the improvement comprising heat exchanger means, WITH TWO HEAT-CONDUCTING CHANNELS ADJACENT EACH OTHER THROUGH WHICH THE EXTRACTED AIR FLOWS COUNTER-CURRENTLY, A COLD SOURCE IN SAID HEAT EXCHANGER MEANS, SAID SOURCE BEING AT A TRANSITION POSITION BETWEEN SAID CHANNELS AND SURROUNDED THEREBY, HEAT SOURCE MEANS ADAPTED TO HEAT SAID HEAT EXCHANGER MEANS, OUTLET MEANS ON SAID HEAT EXCHANGER MEANS, MEANS CONNECTING SAID OUTLET MEANS ON SAID HEAT EXCHANGER MEANS TO SAID RECTIFYING COLUMN, AND MEANS CONNECTING SAID RECTIFYING COLUMN TO SAID DEVELOPING CHAMBER.
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