Abstract: A control system for controlling the processing steps of an electrostatic printing machine including means for generating a series train of clock pulses, means for generating a series train of start or reset pulses and control logic responsive to the reset and clock pulses to generate a plurality of timed control signals for implementing certain of the processing steps. A transfer roller, the linear surface speed of which is synchronized with the moving speed of the photoreceptor, may be used to generate the reset pulses for the successive cycle of processing operation. The intervals between the successive reset pulses, called pitches, are in effect marked by the clock pulses, some of which are used to generate the timed control signals.

Abstract: A processing system having central control including an automated condition responsive system for automatically sequencing and integrating the operation of selected external features utilizable in conjunction with an electrostatographic reproducing process. The processing operation is monitored by means of a central timing control initiated in accordance with a preprogrammed sequence for each of the peripheral operations to be performed in conjunction with the central processing sequence. Sequence control is provided for controlling the sequencing of the peripheral operation in accordance with the timing cycles controlling the central reproducing process. More specifically, control means are set up for automatic document handling, sorting, billing, and jam and recovery control. By utilization of central command logic and separate processing logic, integration of all these operations in accordance with externally controlled program operation is achieved.

Abstract: A programming control system for controlling the processing steps of an electrostatic printing machine of the type employing an endless photoreceptor belt. A photoreceptor speed sensitive element in the form of a transfer roller is utilized for resetting on .Iadd.a .Iaddend.complete machine timing cycle of processing operation. This cycle, called pitch is applied to the belt and comprises a predetermined number of electrical pulses some of which control machine events.