Patent ID: 6074045
Filing Date: 2000-06-13
Classification: B41J

Abstract:
A printhead structure in an image recording apparatus which includes a toner particle source for delivering charged toner particles to an image receiving medium, said printhead structure being arranged between the toner particle source and the image receiving medium to modulate a transport of toner particles from the particle source to the image receiving medium, said printhead structure comprising:a substrate of electrically insulating material having a first surface abutting the toner particle source and a second surface facing the image receiving member;a first cover layer of electrically insulating material arranged on said first surface of the substrate;a plurality of apertures arranged in depression areas through the printhead structure;a first printed circuit including control electrodes arranged between said substrate and said first cover layer to control the transport of toner through the apertures; anda spacer layer of wear-resistant material at least partially coating the first cover layer and in contact with the toner particles to space the first cover layer from the toner particles on the toner particle source.