Charge director replenishment system and method for a liquid toner developing apparatus
First Claim
1. A system for imaging with liquid developer, the liquid developer comprising carrier liquid, toner particles and charge director, the system comprising:
- an imaging surface having an electrostatic image formed thereon;
a reservoir for said liquid developer;
a developer electrode at least a portion of which is spaced from said imaging surface to form a development region therebetween;
a liquid developer supply system operative to supply liquid toner to said development region from the reservoir thereby to develop said electrostatic image;
means for transferring said developed image to a substrate; and
a charge director supply system which supplies charge director at said developer electrode responsive to the charge level of said liquid developer.
2 Assignments
0 Petitions
Accused Products
Abstract
A system for imaging with liquid developer, the developer including carrier liquid, toner particles and charge director, the system including an electrostatic imaging surface apparatus for forming an electrostatic image on the electrostatic imaging surface, a reservoir for the liquid developer, a developer electrode for developing the electrostatic image with the liquid developer to form a developed image, apparatus for supplying the liquid developer to the electrostatic surface and for removing residual liquid developer from the developer electrode and returning the removed developer to the reservoir, apparatus for transferring the developed image to a substrate and charge director supply apparatus responsive to the charge level of the liquid developer, for supplying charge director at the developer electrode for maintaining the charge level of the liquid developer.
28 Citations
23 Claims
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1. A system for imaging with liquid developer, the liquid developer comprising carrier liquid, toner particles and charge director, the system comprising:
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an imaging surface having an electrostatic image formed thereon; a reservoir for said liquid developer; a developer electrode at least a portion of which is spaced from said imaging surface to form a development region therebetween; a liquid developer supply system operative to supply liquid toner to said development region from the reservoir thereby to develop said electrostatic image; means for transferring said developed image to a substrate; and a charge director supply system which supplies charge director at said developer electrode responsive to the charge level of said liquid developer. - View Dependent Claims (2, 3, 4)
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5. A system for imaging with liquid developer, the developer comprising carrier liquid, toner particles and charge director, the system comprising:
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an electrostatic imaging surface; means for forming an electrostatic image to said electrostatic imaging surface; a reservoir for said liquid developer; a developer electrode for developing said electrostatic image with said liquid developer to form a developed image; means for supplying said liquid developer to said electrostatic surface and for removing residual liquid developer from said developer electrode and returning said removed developer to said reservoir; means for transferring said developed image to a substrate; and charge director supply means responsive to the charge level of said liquid developer, for supplying charge director at said developer electrode for maintaining the charge level of said liquid developer. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method of imaging with liquid developer, the developer comprising carrier liquid, toner particles and charge director, the system comprising an imaging surface, a developer electrode at least a portion of which is closely spaced from the imaging surface to form a development region therebetween and a reservoir for said liquid developer, comprising the steps of:
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providing an electrostatic image on the electrostatic imaging surface; providing liquid developer to the development region thereby to develop said electrostatic image; and providing charge director at said developer electrode responsive to the charge level of said liquid developer. - View Dependent Claims (22, 23)
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Specification