Abstract: A method for preventing contamination of a lens assembly by charged particles on an image bearing surface in an electrophotographic printer includes providing a conductive electrode with an opening adjacent the lens assembly; charging the conductive electrode with a variable voltage power supply; and matching a voltage on the image bearing surface with the variable voltage power supply.

Abstract: A method for creating a scratch-off document having hidden information, the method includes providing a substrate; depositing a first layer of first toner particles on the substrate, wherein the first layer includes at least two thicknesses in which one region is thicker than the other region; depositing a second layer of toner particles on the first layer, wherein the first toner particles have a different thermal conductivity than the second toner particles; and applying heat to the first and second layers simultaneously so that the first layer adheres to the substrate in regions of the lesser thickness of the first toner particles and does not adhere in the regions of greater thickness of the first toner particles; wherein the first and second layers in the regions of greater thickness of the first toner layer can be removed thereby revealing hidden information.

Abstract: A method for creating a scratch-off document having hidden information, the method includes providing a substrate; depositing a first layer of first toner particles on the substrate, wherein the first layer includes at least two thicknesses in which one region is thicker than the other region; depositing a second layer of toner particles on the first layer, wherein the first toner particles have a different thermal conductivity than the second toner particles; and applying heat to the first and second layers simultaneously so that the first layer adheres to the substrate in regions of the lesser thickness of the first toner particles and does not adhere in the regions of greater thickness of the first toner particles; wherein the first and second layers in the regions of greater thickness of the first toner layer can be removed thereby revealing hidden information.

Abstract: A scratch-off document includes a substrate and a toner covering; the toner covering including: a first layer of first toner particles on the substrate having a first and second thickness, wherein the first and second thicknesses are different; a second layer of second toner particles on the first layer of toner particles; and at least one additive in either the first or second layer for creating a thermal conductivity difference between the first and second layer, wherein a portion of the first layer having a greater thickness and a portion of the second toner layer in registration with the first layer of greater thickness is manually removable by a scratching action.

Abstract: An electrophotographic method is disclosed that reduces damage to a fusing roller by taking into account the thickness of the receiver sheet and adjusting the spacing between the fusing rollers in accordance with such thickness to ensure that a toned image is fully fixed on a receiver sheet while reducing damage to the fusing rollers.

Abstract: An electrophotographic machine includes a fusing station configured for fusing an image to an image substrate by applying fusing process parameters to the image substrate. A controller adjusts the fusing process parameters applied to the image substrate dependent at least in part upon whether the image substrate is to be processed by a glossing station to thereby reduce undesirable image artifacts that result when an image contaminated with release fluid is fused and then glossed.