Development control system
AssigneeIndigo N.V.
InventorsIshaiau Lior, Ehud Chatow, Amiran Lavon
Life of this patent
Estimating the term…
Abstract
Toning apparatus for toning an electrostatic latent image, having image and background portions at different potentials on an imaging surface. The apparatus comprises an endless toning surface coated with a layer of concentrated toner and engaging the imaging surface at a toning region. The apparatus additionally comprises a source of voltage connected to the toning surface and electrifying the toning surface to a voltage operative to selectively transfer at least a portion of the layer to image portions on the imaging surface. A developed mass per unit area (DMA) controller having an input indicative of the DMA on the imaging surface is operative to adjust the DMA on the toning surface in response to the input.
Claims27
Toning apparatus for toning an electrostatic latent image, having image and background portions at different potentials, on an imaging surface comprising:
- a source of liquid developer having a given concentration of toner material;
- an toning surface, coated with a layer of concentrated liquid developer having a higher toner concentration than the given concentration and derived from the source of liquid developer and engaging the imaging surface at a toning region;
- a source of voltage connected to the toning surface and electrifying the toning surface to a voltage operative to selectively transfer at least a portion of the layer to image portions on the imaging surface;
- and
- a developed mass per unit area controller having an input indicative of the mass of toner material per unit area (DMA) on the imaging surface and operative to adjust the DMA on the toning surface, without changing the given concentration, in response to the input.
Imaging apparatus comprising:
- an imaging surface having a latent electrostatic image thereon;
- and
- toning apparatus according to any of the preceding claims operative for toning the image portions of the latent image with a layer of liquid developer.
Squeegeeing apparatus for use in liquid imaging to squeegee an endless moving surface, comprising:
- a squeegee roller having a squeegee surface associated with said endless moving surface, and
- a source of pressure applied to a central portion of the squeegee surface and arranged such that the pressure urges the squeegee surface against said endless surface.
Dependencies are inferred from the claim text.