Patent ID: 8297728
Filing Date: 2012-10-30
Classification: B41J

Abstract:
1. A method for controlling print speed of an imaging device, the method comprising: measuring an image density of at least a portion of a print job for the imaging device; detecting a state of a level sensor for an ink level in a print head reservoir in the imaging device, the detected state indicating an open loop state or a closed loop state; generating an estimate of a volume of ink in the print head reservoir with reference to the detected state of the level sensor; comparing the estimate of the volume of ink to a threshold value; adjusting a current print speed of the imaging device to a target speed in response to the estimate of the ink volume being less than the threshold value; modifying the estimate of the volume of ink with an amount corresponding to a volume of melted ink added to the print head reservoir; and transitioning the current print speed of the imaging device to a speed that is greater than the target speed with reference to a damping constant in response to the estimate of the ink volume indicating an ink level in the print head reservoir contacts a sensor in the printhead.