Patent ID: 7676191
Filing Date: 2010-03-09
Classification: H04N

Abstract:
1. A method of duplex printing on sheet media comprising: (a) feeding media sheets serially into a first printing device with an edge inserted into the printing device first comprising a leading edge and the edge entering the printing device last being a trailing edge; (b) registering on the leading edge and printing an image on a first side of the sheets such that the sheet emerging from the printing device contains an image on the first side but an image is not placed on an opposite second side of the sheet; (c) inverting the sheets such that the trailing edge faces the direction of motion and the first side is flipped over, and then feeding the sheet serially out of the device in a direction with the leading edges trailing; (d) transporting the sheets through a change in direction of about 90 degree without rotation of the sheets such that the leading edge and the trailing edge are currently oriented perpendicular to the direction of motion; (e) transporting the sheets in a sideways translation motion such that the sheets move in a manner where both the leading edge and the trailing edge are oriented perpendicular to the direction of motion; (f) transporting the sheets through a change in direction of about 90 degree without rotation of the sheets such that the leading edge is again leading by currently being oriented toward the direction of motion; (g) feeding the sheets into a second printing device and registering on the leading edge and printing on the side opposite the one side h) inverting the sheets after printing in the second device such that the first side is facing the direction that the second side was previously facing and the trailing edge is currently facing toward the direction of motion; and i) feeding the sheets out.