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US 4,357,618 AGranted
Electrostatic imaging apparatus
AssigneeAlgographic Associates
InventorEvan L. Ragland
Life of this patent
Estimating the term…
Abstract
An electrostatic imaging process uses either a moving belt or a rotating drum with an insulative or dielectric layer backed by a conductive layer. A matrix of writing styli are used to charge the dielectric layer which are ionized air jets. After the image is developed by a toner, the toner is heated so that it will be concurrently transferred and fixed to the paper sheet.
Claims7
Electrostatic imaging apparatus comprising:
- a member having a surface capable of holding an electrostatic image on its surface;
- means for applying a substantially uniformly distributed electrostatic charge on said surface;
- and writing means for creating said electrostatic image including means for providing a selective plurality of ionized gas-jets which discharge impinged upon portions of said uniformly distributed charge including a non-conductive plate having a plurality of perforations and in close proximity to said surface and electrical means individually connected to each perforation for gating said perforations open or closed for selecting which of the perforations will provide an ionized gas-jet.
Dependencies are inferred from the claim text.