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US 2003/0113138 A1Published application
Liquid toner application system
AssigneeHewlett-Packard Indigo B.V.
InventorBoaz Tagansky
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AssigneeHewlett-Packard Indigo B.V.
InventorBoaz Tagansky
Estimating the term…
A coating system comprising: a rotating roller; an electrode having a surface located adjacent the roller that defines a space between the surface of the roller and the electrode surface, which space has first and second apertures located at different angular positions about the axis of the roller, wherein the electrode surface is formed with at least one drain aperture located between the first and second apertures; a voltage source that applies a voltage difference between the electrode and the roller; and a source of liquid toner comprising charged toner particles dispersed in a carrier liquid that discharges the liquid toner into the space through the first aperture, wherein a portion of the liquid toner discharged into the space coats a region of the surface of the roller that passes by the electrode, a portion exits the space through the second aperture and a portion exits through the at least one drain aperture.
A coating system comprising:
A coating system according to any of the preceding claims wherein the drain aperture is located at an angular position displaced from the first aperture equal to about ⅓ the angular distance between the first and second apertures.
A coating system according to any of the preceding claims wherein the portion of the toner that leaves the space through the drain aperture less than half of the toner that is discharged into the space.
A coating system according to any of the preceding claims wherein the portion of the toner that leaves the space through the drain aperture less than one third of the toner that is discharged into the space.
A coating system according to any of the preceding claims wherein the carrier liquid comprises counter-ions and the voltage difference causes the counter-ions to migrate towards the electrode and the charged toner particles to migrate towards and coat the roller.
A coating system according to any of the preceding claims wherein the at least one drain aperture comprises a plurality of apertures.
A printing system for printing an image on a substrate using liquid toner comprising:
Dependencies are inferred from the claim text.