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US 9,857,714 B2Granted
Making a liquid electrophotographic (LEP) paste
AssigneeHewlett-Packard Development Company, L.P.
InventorDoris Pik-Yiu Chun
Life of this patent
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Abstract
A method of making a liquid electrophotographic (LEP) paste is disclosed herein. A base paste is made by forming a dispersion of a pigment and a non-polar carrier, adding a transparent resin dispersion to the pigment dispersion to form a dispersion mixture, and homogenizing the dispersion mixture. The transparent resin dispersion includes a polymer dispersed in a non-aqueous carrier. The homogenizing may be accomplished by agitating the dispersion mixture at a frequency of less than 1 kHz, thereby forming the paste.
Claims12
A method of making a liquid electrophotographic (LEP) paste, comprising:
- forming a pigment dispersion of a non-polar carrier and a pigment chosen from i) a pigment having a silver appearance or ii) a combination of the pigment having the silver appearance and an other pigment having a pearlescent optical property;
- adding a transparent resin dispersion to the pigment dispersion to form a dispersion mixture, the transparent resin dispersion including a polymer dispersed in a non-aqueous carrier;
- and
- then homogenizing the dispersion mixture, the homogenizing being accomplished by agitating the dispersion mixture at a frequency ranging from 1 Hz to 1 kHz, thereby forming the paste, wherein the pigment having the silver appearance maintains its original morphology in the paste after processing.
1 more element
Dependencies are inferred from the claim text.