Patent ID: 8256869
Filing Date: 2012-09-04
Classification: B41J

Abstract:
1. An imaging device comprising: an ink receiving surface of a drum that is movably supported within the imaging device; at least one printhead including a plurality of ink jets, each ink jet being configured to eject drops of ink on the ink receiving surface of the drum; a first electrode positioned adjacent the ink receiving surface, the first electrode being configured to output capacitance signals indicative of a capacitance in a first gap between the first electrode and the ink receiving surface of the drum; a second electrode positioned adjacent the ink receiving surface, the second electrode being configured to output capacitance signals indicative of a capacitance in a second gap between the second electrode and the ink receiving surface of the drum; and a controller operatively connected to the first electrode and the second electrode to receive the capacitance signals from the first and the second electrodes, the controller being configured to: