Printing system
AssigneeHewlett-Packard Development Company, L.P.
InventorsRodolfo Jodra, Bruce Jackson
Life of this patent
Estimating the term…
Abstract
In an implementation of a printing system, an electrophotographic imaging plate electrostatically attracts a first concentration of an ink having a particular color. A developer unit is biased with a developer voltage and the first concentration of the ink is transferred onto the electrophotographic imaging plate from the developer unit according to the developer voltage. The electrophotographic imaging plate then electrostatically attracts a second concentration of the ink. The developer unit is biased with an adjusted developer voltage and the second concentration of the ink is transferred onto the electrophotographic imaging plate from the developer unit according to the adjusted developer voltage.
Claims38
A printing system, comprising:
- an electrophotographic imaging plate configured for a first exposure to electrostatically attract a first concentration of an ink having a particular color, and further configured for a second exposure to electrostatically attract a second concentration of the ink;
- a developer unit configured to transfer the first concentration of the ink onto the electrophotographic imaging plate corresponding to the first exposure, and further configured to transfer the second concentration of the ink onto the electrophotographic imaging plate corresponding to the second exposure;
- and
- a developer voltage configured to bias the developer unit with a first voltage to transfer the first concentration of the ink, and further configured to bias the developer unit with a second voltage to transfer the second concentration of the ink.
A printing system, comprising:
- an electrophotographic imaging plate configured to attract a first concentration of an ink according to a bias voltage, and further configured to attract a second concentration of the ink according to an adjusted bias voltage, the ink being attracted from a single ink source;
- and
- an offset pad configured to engage the electrophotographic imaging plate which transfers the first concentration of the ink and the second concentration of the ink onto the offset pad to form an inked image, the offset pad further configured to transfer the inked image onto a print media to form a printed image.
A printing system comprising an electrophotographic imaging plate configured to attract a first concentration of an ink from an ink source according to a bias voltage, and further configured to attract a second concentration of the ink from the ink source according to an adjusted bias voltage, the first concentration of the ink transferred onto a print media as a light color version of the ink and the second concentration of the ink transferred onto the print media as a dark color version of the ink.
A method, comprising:
- exposing an electrophotographic imaging plate to generate a discharged image area to electrostatically attract a first concentration of an ink having a particular color;
- biasing a developer unit with a first developer voltage;
- transferring the first concentration of the ink onto the electrophotographic imaging plate from the developer unit according to the first developer voltage;
- exposing the electrophotographic imaging plate to generate the discharged image area to electrostatically attract a second concentration of the ink;
- biasing the developer unit with a second developer voltage;
- and
- transferring the second concentration of the ink onto the electrophotographic imaging plate from the developer unit according to the second developer voltage.
One or more computer readable media comprising computer executable instructions that, when executed, direct a printing system to:
- receive digital print data corresponding to an image to be printed;
- determine a light color region of the image;
- determine a dark color region of the image;
- expose an electrophotographic imaging plate to electro-statically attract a first concentration of an ink corresponding to the light color region of the image;
- bias a developer unit with a developer voltage to transfer the first concentration of the ink onto the electrophotographic imaging plate;
- expose the electrophotographic imaging plate to electro-statically attract a second concentration of the ink corresponding to the dark color region of the image;
- and
- adjust the developer voltage to bias the developer unit to transfer the second concentration of the ink onto the electrophotographic imaging plate.
A printing system, comprising:
- means to expose an electrophotographic imaging plate to attract a first concentration of an ink having a particular color from a developer unit;
- means to transfer the first concentration of the ink onto the electrophotographic imaging plate according to a developer voltage;
- means to expose the electrophotographic imaging plate to attract a second concentration of the ink from the developer unit;
- and
- means to transfer the second concentration of the ink onto the electrophotographic imaging plate according to an adjusted developer voltage.
Dependencies are inferred from the claim text.