| 摘要 |
Control over the electrostatographic process is provided by adjusting the toner charge-to-mass ratio in response to changes in toner contrast. An electrostatographic reproduction machine produces a signal having a value characteristic of the toned density of the developed image. Using the signal, the charge-to-mass ratio of the toner is adjusted. In a preferred embodiment, the signal is produced by comparing the toned density of the developed image to a reference value, and charge-to-mass is adjusted by directing an ion cloud over the toner particles.
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