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US 10,948,853 B2Granted
Liquid electro-photographic printing transfer devices
AssigneeHP Indigo B.V.
InventorsLavi Cohen, Doron Schlumm, Asaf Shoshani
Life of this patent
Estimating the term…
Abstract
In an example, charged particles suspended in a non-conductive fluid are fed to a transfer device. A width of a charged particles layer of uniform density on a surface of the transfer device is controlled. Charged particles are transferred from the charged particles layer to a photo imaging plate of a liquid electro-photographic printing system.
Claims7
A binary ink developer for a liquid electro-photographic printing system, comprising:
- a developer roller to transfer charged particles in an ink from a surface of the developer roller onto a photo imaging plate, the developer roller having multiple conductive segments each individually controllable to attract or repel charged particles to/from the surface of the developer roller;
- an ink supply path along which the ink is fed toward the surface of the developer roller;
- and
- an electrode having multiple conductive segments each located opposite a corresponding one or more of the roller segments and each individually controllable to generate an electric field attracting or repelling charged particles in the ink to/from the surface of the developer roller.
1 more element
A binary ink developer for a liquid electro-photographic printing system, comprising:
- a transfer device to transfer charged particles from a surface of the transfer device onto a photo imaging plate;
- an ink supply path to feed the charged particles suspended in a non-conductive fluid to the transfer device;
- an electrode arrangement to generate an electric field attracting or repelling charged particles to/from the surface of the transfer device;
- wherein the surface of the transfer device is dividable into segments, and attracting or repelling charged particles to/from the segments is individually controllable;
- and
- a squeegee roller with a plurality of segments made of conductive material, the segments being arranged along a direction parallel to an axis of rotation of the squeegee roller, wherein the segments are electrically insulated from each other.
3 more elements
A binary ink developer assembly usable with a printing system, comprising:
- a developer roller having a surface to receive charged particles from an ink reservoir and transfer charged particles to a photo imaging plate;
- and
- a device to generate an electric field attracting or repelling charged particles to/from the developer roller surface, the device including an electrode opposite the developer roller surface with multiple conductive segments each individually controllable to generate multiple different electric fields along a width of the developer roller surface to attract or repel charged particles to/from the developer roller surface.
Dependencies are inferred from the claim text.