Abstract: An novel electrophotographic photoreceptor is provided comprising on an electrically conductive support a layer containing a charge-transporting compound and a charge-generating compound or a charge-transporting compound-containing layer and a charge-generating compound-containing layer, wherein said charge-generating compound is a trisazo compound represented by the general formula (1): ##STR1## wherein Ar.sup.1, Ar.sup.2, Ar.sup.3, Ar.sup.4, Ar.sup.5 and Ar.sup.6 each represents an arylene group, divalent condensed polycyclic aromatic group or divalent group derived from a monocyclic or condensed polycyclic heterocyclic aromatic group, each of which may have one or more substituents; C.sub.p respresents a coupler residual group; and n represents 1 or 2.

Abstract: A multi-function copying machine having a reading section for reading picture data on an original by raster scanning. A recording section has a plurality of recording devices adapted to perform recording at different recording positions. The recording section applies to the recording devices a picture signal for each color for multi-color recording or a picture signal for each side of the original for two-side recording. Recording control is achieved by a control system for controlling the timing of delivery of the picture signal applied to the recording devices. An editing control circuit sets the timing of delivery of a part of the picture signal provided by the reading section to the recording section, for editing the picture data on the original. A memory delays the timing of delivery of a predetermined picture signal to the recording section according to the timing of delivery set by the control system.