Method and apparatus for charged particle generation

Details Method and apparatus for charged particle generation Method and apparatus for charged particle generation

G - Physics

03

G

314/39

G03G 15/02 (2006.01) G03G 15/32 (2006.01)

Patent

CA 2001602

METHOD AND APPARATUS FOR CHARGED PARTICLE GENERATION ABSTRACT Method and apparatus for charged particle generation, particularly for use in electrographic imaging, in which charged particles are generated in a discharge region and extracted to form an electrostatic image, wherein a controlled gas is introduced into the discharge region for improved operation and service life. The controlled gas may consist of nitrogen, an elemental noble gas (or mixture of such gasses), or a mixture of nitrogen with one or more noble gasses. In the preferred charged particle generator designs, a high voltage alternating potential (drive voltage) is applied between driver and control electrodes separated by a solid dielectric member to induce glow discharges within apertures in the control electrodes. Injecting controlled gas into the various discharge sites dramatically reduces the threshold voltages for charged particle generation as well as the corrosion and fouling of electrodes and dielectrics, providing a more durable device and improved electrographic print quality.

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