Patent ID: 9199499
Filing Date: 2015-12-01
Classification: B41J

Abstract:
1. A printer comprising: a printhead configured with inkjets to eject drops of material; a supply of substrate configured to move a substrate to a position opposite the printhead to receive drops ejected from the printhead; a digital camera configured to generate data corresponding to the drops on the substrate; and a controller operatively connected to the supply of substrate, the digital camera, and the printhead, the controller being configured to operate each inkjet in the printhead repetitively to eject a predetermined number of drops of material, which is greater than one, from each inkjet in the printhead onto the substrate while the substrate remains stationary at the position opposite the printhead to enable the predetermined number of drops of material to form a test dot for each inkjet having the predetermined number of drops of material at a position opposite each inkjet so the test dots form a test pattern on the substrate, to move the substrate from being opposite the printhead to a position opposite the digital camera, to operate the digital camera to generate data of the test pattern on the substrate, and to identify inoperable inkjets in the printhead with reference to the data received from the digital camera.