| 摘要 |
The present utility model relates to an apparatus for blue printing by means of ammonia gas comprising a sealed housing, an associated main door sealably provided on the opening of a sidewall of the housing, a pair of adjacent first and second compartments with perforated inner walls provided within the lower portion of the housing to facilitate the circulation of ammonia gas, an ammonia gas supplying means provided on tbe first compartment and a heating means provided on the second compartment to heat ammonia liquid. The ammonia gas supplying means is provided with a metering device to control the flow and volume of liquid ammonia to be dispensed for heating and conversion to ammonia gas. |
