Title: Electrographic photocomposing machine

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Abstract: An electrographic photocomposing machine comprises a rotary type carrier provided with a flashtube having a control unit, a photographic unit, and a line forming mechanism, the latter two being arranged in series downstream of the type carrier along the beam from the flashtube. The line forming mechanism is provided with a drive made as a start-stop mechanism comprising a series arrangement including an electric pulse generator, a switch and a step motor. The machine also comprises an electrophotographic section including a cylindrical intermediate image carrier having a drive similar to that of the line forming mechanism and being optically associated with the latter, a device for transferring the powder image with a paper feed system, and a unit for fixing the powder image on the paper with heaters arranged in proximity to the paper web. The unit for fixing the powder image on the paper has a self contained means for contact heating of the paper web, a means for air cooling of the powder image, and a unit for pulsed actuation of the heaters, the latter unit being essentially a series arrangement including a cyclic pulse counter of the intermediate image carrier drive and a switch. One of the outputs of the unit for pulsed actuation of the heaters is connected to the latter, while the other output is connected to the means for air cooling of the powder image. In addition, the machine comprises a computer unit coupled to the control input of the switch of the drive of the line forming mechanism, to the control unit of the flashtube, and to the control unit of the switch of the drive of the intermediate image carrier.


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