| 摘要 |
This invention relates to a development device for developing sheets of diazo copying material, in particular microfiches, comprising a substantially gas-tight, closed development chamber adapted to contain a developer medium composed of ammonia gas and water vapor, a pair of feed rolls at a feed opening, a pair of delivery rolls at a delivery opening and a first and a second pair of guide rolls in said chamber next to the pair of feed rolls and the pair of delivery rolls, an upper and a lower gas-permeable endless belt guided around one roll of each pair of guide rolls in each case, a space between adjacent sides of said endless belts aligned with gaps between the pairs of feed and delivery rolls, and means for presetting the peripheral speed of the feed rolls independently of the development temperature, whereby the sheets may be transported at a relatively high or a relatively low development temperature.
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