US 7,469,119 B2
Synchronous duplex printing systems with intermediate transfer members
Dana G. Marsh, Newark, N.Y. (US); George R. Walgrove, III, Rochester, N.Y. (US); and Michael W. Frauens, Webster, N.Y. (US)
Assigned to Eastman Kodak Company, Rochester, N.Y. (US)
Filed on Mar. 11, 2005, as Appl. No. 11/77,615.
Claims priority of provisional application 60/557514, filed on Mar. 29, 2004.
Prior Publication US 2005/0214039 A1, Sep. 29, 2005
Int. Cl. G03G 15/20 (2006.01)
U.S. Cl. 399—309  [399/299; 399/306; 399/308] 8 Claims
OG exemplary drawing
 
1. A duplex imaging system to create a toner image or coating comprising:
a non-web first imaging assembly, including a first photoconductor, for imaging on a first side of a receiver material wherein the first imaging assembly includes a first split intermediate transfer roller having two or more portions that are electrically independent wherein each portion can be simultaneously biased to a different voltage for imaging, one or more portion having a first discharged area development mode;
a second imaging assembly including a second photoconductor, for imaging on a second side of the receiver material, wherein the second imaging assembly includes a second split intermediate transfer roller, including one or more portions having a second charged area development mode; and
wherein the first and second imaging assemblies synchronously image on their respective sides of the receiver material utilizing one or more split intermediate transfer rollers separated into two or more portions with distinct electrical regions that are electrically isolated from each other such that each imaging assembly, with its respective intermediate transfer roller, has the ability to operate with independent operating modes and toner polarity.