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AssigneeEastman Kodak Company
InventorsGeorge P. Kasper, Arthur S. Kroll, Michael Mosehauer
Estimating the term…
In a novel electrographic copying method and apparatus, a latent electrostatic image is formed on an insulating layer of an electrophotographic element and, before, during or after the formation of the latent electrostatic image, there is created a plurality of charge islands, such as by an exposure through a screen. These charge islands are distinct and in addition to any charge islands which result from the image-forming step. After establishment of the charge islands and the latent electrostatic image, the resulting charge pattern is developed with a developer which either is at least partially conductive, i.e., has a maximum resistance of about 10.sup.9 ohms, or is rendered so by the phenomenon of electrical breakdown.
An electrographic copying method for producing images having improved maximum density and tonal range comprising:
An electrographic copying method for reproducing continuous tone images having improved maximum density and tonal range comprising:
An electrographic copying method for reproducing continuous tone images having improved maximum density and tonal range comprising:
In an electrographic apparatus which includes an imaging member having an image recording area and means for forming an electrostatic image on said area, the improvement which comprises means for forming on said area, before, during or after forming said image on said area, a plurality of charge islands in addition to any such islands already present, and development means including a supply of a developer having a maximum resistance of about 10.sup.9 ohms for applying such developer to the resulting electrostatic image.
In an electrographic apparatus which includes a photoconductive imaging member having an image recording area and means for forming an electrostatic image on said area, the improvement which comprises means for forming on said area, before, during or after forming said image on said area, a plurality of charge islands in addition to any such islands already present, and development means including a supply of a developer having a maximum resistance of about 10.sup.9 ohms for applying such developer to the resulting electrostatic image.
In an electrographic apparatus which includes a photoconductive imaging member having an image recording area and means for forming an electrostatic image on said area, the improvement which comprises the inclusion of a halftone screen in the imaging member for forming on said area, before, during or after forming said image on said area, a plurality of charge islands in addition to any such islands already present, and development means including a supply of a developer having a maximum resistance of about 10.sup.9 ohms for applying such developer to the resulting electrostatic image.
Dependencies are inferred from the claim text.