Electrophotographic printer with duplex printed sheet output

摘要

Printing apparatus for producing collated sets of duplex printed sheets. The apparatus includes an input sheet feed path for feeding sheets to an electrophotographic imaging apparatus to print one side of a print sheet and an output sheet feed path to feed the sheet from the imaging apparatus to an output stacker. A duplexing sheet feed path can be selectively actuated to divert the sheet from the output path to flip the sheet as the sheet is continuously fed back to the input sheet feed path to print the image on the other side of the sheet. The apparatus is designed to print a plurality of sheet sizes by selective control of pressure and vacuum forces.