Patent ID: 8224226

Claim:
A method of increasing productivity in a reproduction apparatus, the method comprising: providing a first print engine and a second print engine coupled by an inverter so that each sheet of a plurality of receiver sheets is selectively printed in an invert mode or a non-invert mode; adjusting a difference of a travel time of a first receiver sheet in an invert path through the inverter in the invert mode as compared to a travel time of a second receiver sheet in a non-invert path through the inverter in the non-invert mode to be an integral multiple of a period between the receiver sheets; synchronizing timing of one or more frames on a dielectric support member (DSM) of the second print engine with the timing of one or more frames on a DSM of the first print engine such that one or more receiver sheets imaged through interaction with the one or more frames on the first print engine DSM are imaged in registration with corresponding frames on a DSM of the second print engine; if switching from a first mode having a first paper path travel time to a second mode having a second paper path travel time which is longer than the first paper path travel time, then skipping a number of frames on the second print engine DSM corresponding to the integral multiple; and if switching from a first mode having a first paper path travel time to a second mode having a second paper path travel time which is shorter than the first paper path travel time, then skipping a number of frames on the first print engine DSM corresponding to the integral multiple.