Digital printing system for printing on both surfaces of a sheet of print media

A digital printing system for printing on both surfaces of a sheet of print media, the printing system including:a first print engine; anda second print engine in an opposed, aligned relationship with the first print engine, each print engine including an inkjet printhead and a transfer roller on to which ink ejected from the printhead is deposited to be applied, in turn, on an associated surface of the print media, the transfer roller of one print engine further serving as an urging means for the transfer roller of the other print engine for urging the transfer rollers into contact with their associated surfaces of the print media.