An image processing apparatus includes a color reader for reading image signals, a multi-output memory for outputting the image signals to a plurality of color printers, a control unit for discriminating operating states of the color printers, and a sync control for performing output control of the image...http://www.google.com.hk/patents/US5040031?utm_source=gb-gplus-share專利 US5040031 - Image processing apparatus which can control output to multiple devices to accommodate differing operating timing of those devices
