Patent ID: 8676072
Filing Date: 2014-03-18
Classification: G03G

Abstract:
1. A method for printing, the method comprising: providing a primary imaging member having individual engine pixel locations with a range of ratio modulated differences of potential of a first polarity at each individual engine pixel location; establishing a first development difference of potential of the first polarity relative to a ground, to form a first net development difference of potential between the first development difference of potential and the individual engine pixel locations; providing a first charged toner of a second polarity that is opposite from the first polarity such that the first toner develops at the individual engine pixel locations according to the first net development difference of potential at the individual engine pixel locations; establishing a second development difference of potential of the first polarity relative to ground that is greater than the first development difference of potential proximate the individual engine pixel location to form a second net development difference of potential between the second development difference of potential, a first toner potential at the individual engine pixel location and a ratio modulated difference of potential at the individual engine pixel location; and providing a second charged toner having a polarity that is the same as a polarity of the first charged toner such that such that the second toner develops at the engine pixel location according to the second net development difference of potential; wherein the range of second toner potential that can be developed at an individual engine pixel location is within a range of ratio modulated differences of potential, and wherein the first development difference of potential is determined such that an amount of first toner potential developed with the range of second toner potential at an engine pixel location in response to a ratio modulated difference of potential allows a first toner amount and any of a determined range of second toner amounts to be provided at the individual engine pixel locations.