In liquid electrophotography, deformable blades are used to remove ink residuals and liquid from the organic photoconductor (OPC) drum. The thin layer remaining after the blade can produce undesirable chemical residuals on its surface. When bombarded by ions at the charging station, this layer can oxidize and affect the OPC's electrical properties. In this work the authors investigate the blade-OPC drum conjunction under fully flooded inlet and outlet conditions; a theoretical model incorporating elastohydrodynamic (EHD) considerations was developed where a deformable blade was deflected by a moving surface (OPC). Unlike typical EHD problems, which are widely discussed in the literature, the authors case consists of a contact line which causes a singularity problem in the analysis. This singularity is due to the blade's sharp corner edge prior to its deformation. In order to overcome this singularity, the authors first solved the elastic-static deformation of the tip using finite element simulation software (COMSOL) and combined hydrodynamics considerations afterwards. Experimental results were found to closely agree with the authors calculations.
Wael Salalha, Doron Avramov, Stanislav Reznik, Eyal Zussman, "Elastohydrodynamic Study for Deformable Blade-Organic Photoconductor Conjunction" in Journal of Imaging Science and Technology, 2010, pp 50303-1 - 50303-8, https://doi.org/10.2352/J.ImagingSci.Technol.2010.54.5.050303