Method and system for reduction of caking
AssigneeXeikon IP BV
InventorsDirk Marcel Constant Gijsbrechts, Werner Jozef Johan Op De Beeck, Wim Libaers, Lode Erik Dries Deprez
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Abstract
A method for the reduction of caking of excess liquid developer dispersion that remains present on the surface of a member after transfer of liquid developer dispersion from one member to another member in a digital printing apparatus, comprising the step of adding a dispersing composition to the excess liquid developer dispersion, wherein the dispersing composition comprises a dispersing agent.
Claims19
A method for the reduction of caking of excess liquid developer dispersion that remains present on the surface of a member after transfer of liquid developer dispersion from one member to another member in a digital printing apparatus, comprising the step of adding a dispersing composition to the excess liquid developer dispersion by a dispersing agent adding means,
- wherein the dispersing composition comprises a free dispersing agent;
- wherein liquid developer is stored in a liquid developer dispersion reservoir for feeding a toner supply member of the digital printing apparatus;
- and
- wherein the excess liquid developer dispersion is collected in a reservoir, and
- wherein the adding means are arranged for adding an amount of dispersing agent to said reservoir and/or wherein the adding means are arranged for adding an amount of dispersing agent to the excess liquid developer dispersion before or after it is removed from the member;
- and
- wherein the adding by the dispersing agent adding means is controlled by a controller which determines a suitable amount of dispersion composition to be added;
- and
- wherein the excess liquid developer dispersion with the added dispersing composition is returned to the liquid developer dispersion reservoir.
A method for the reduction of caking of excess liquid developer dispersion that remains present on the surface of a member after transfer of liquid developer dispersion from one member to another member in a digital printing apparatus, comprising the step of adding a dispersing composition to the excess liquid developer dispersion, wherein the dispersing composition comprises a free dispersing agent;
- wherein the method further comprises the step of determining an amount of dispersing composition to be added to reduce caking of excess liquid developer dispersion, wherein the adding comprises adding the determined amount;
- wherein a viscosity of the excess liquid developer dispersion is measured, and determining an amount of dispersing composition to be added is based on the measured viscosity.
A method for the reduction of caking of excess liquid developer dispersion that remains present on the surface of a member after transfer of liquid developer dispersion from one member to another member in a digital printing apparatus, comprising the step of adding a dispersing composition to the excess liquid developer dispersion,
- wherein the dispersing composition comprises a free dispersing agent;
- wherein the method further comprises collecting image information about an image that is being printed in the digital printing apparatus;
- the image information being representative for the fraction of liquid developer dispersion that is being developed;
- and determining an amount of dispersion composition to be added based on the collected image information;
- wherein the adding of the dispersion composition comprises adding the determined amount of dispersion composition.
A method for the reduction of caking of excess liquid developer dispersion that remains present on the surface of a member after transfer of liquid developer dispersion from one member to another member in a digital printing apparatus, comprising the step of adding a dispersing composition to the excess liquid developer dispersion during printing, wherein the dispersing composition comprises a free dispersing agent, and
- wherein the excess liquid developer dispersion is removed from the member before adding the dispersing composition.
Digital printing system comprising:
- a first member in rotational contact with a second member;
- the first and second member being configured for transferring liquid developer dispersion from the first member to the second member, such that an excess liquid developer dispersion remains present on the surface of the first member after transfer of liquid developer dispersion to the second member;
- adding means configured for adding an amount of free dispersing agent to the excess liquid developer dispersion;
- and
- control means for controlling the adding means such that the amount added is sufficient to reduce caking in the excess liquid developer dispersion;
- a liquid developer dispersion reservoir for storing liquid developer;
- wherein the system is configured to return the excess liquid developer dispersion with the added dispersing composition to said liquid developer dispersion reservoir;
- a toner supply member for feeding the first member with liquid developer from the liquid developer dispersion reservoir;
- a reservoir adapted for collecting the excess liquid developer dispersion;
- and
- wherein the adding means are configured to add an amount of dispersing agent to said reservoir and/or wherein the adding means are arranged for adding an amount of dispersing agent to the excess liquid developer dispersion before or after it is removed from the member.
Dependencies are inferred from the claim text.