Patent ID: 9440434
Filing Date: 2016-09-13
CPC Classification: B41J

Claim Text:
1. A printer comprising: a transport path configured to convey media through the printer in a process direction; at least one printhead positioned opposite the transport path, the at least one printhead being configured with inkjets to eject drops of ink onto the media conveyed by the transport path past the at least one printhead in the process direction; a sensor positioned adjacent the transport path, the sensor being configured to generate a signal indicating a slope in the media being conveyed by the transport path before the media passes the at least one printhead; and a controller operatively connected to the at least one printhead and the sensor, the controller being configured to modulate driving signals used to operate inkjets in the at least one printhead to: operate the inkjets in the at least one printhead to eject a first volume onto the media by modulating the driving signals used to operate the inkjets in the at least one printhead in response to the signal from the sensor indicating the slope of the media is positive and less than a first threshold and the signal from the signal from the sensor indicating the slope of the media is negative and less than the first threshold; and operate the inkjets in the at least one printhead to eject ink drops having a second volume onto the media by modulating the driving signals used to operate the inkjets in the at least one printhead in response to the signal from the sensor indicating the slope of the media is positive and greater than a second threshold and the signal from the sensor indicating the slope of the media is negative and greater than the second threshold, the first threshold being less than the second threshold and the first volume being less than the second volume.