Enhanced fuser offset latitude method
AssigneeEastman Kodak Company
InventorsDavid F. Cahill, Mark C. Zaretsky, William J. Hagen
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Abstract
Electrophotographic printing of one or more layers of toner using a method of enhancing fuser offset latitude to enable the printing of a wide range of toner mass laydown using electrophotography. This method encompasses the steps of forming multicolor toner images, determining the amount of clear overcoat mass laydown as a function of the color mass laydown or non-raised mass laydown and fusing the clear toner overcoat and the multicolor toner image at a fusing temperature determined by the maximum total mass laydown and the nip width to provide good adhesion to the receiver member while optimizing fuser offset latitude.
Claims23
A method of enhancing fuser offset latitude during electrophotographic printing of a raised multicolor image on a receiver member, the method comprising:
- forming a first multicolor toner image having raised areas with 100 percent coverage of a clear overcoat toner on the receiver member;
- forming a second multicolor toner image having non-raised areas with one or more layers of color toner, the non-raised area having a non-raised mass laydown (NRML;
- mg/cm2);
- determining an amount of clear overcoat mass laydown in the non-raised areas (OML;
- mg/cm2), as a function of one or more NRML based factors comprising a fuser temperature and a nipwidth to optimize the fuser latitude while not exceeding a total mass laydown (TML);
- combining the first and the second multicolor toner images having raised areas and non-raised areas and depositing toner accordingly;
- fusing the clear toner overcoat and the multicolor toner image at a fusing temperature determined by the maximum total mass laydown (TML) in a raised area and the nip width to provide good adhesion to the receiver member while optimizing fuser offset latitude.
A method of enhancing fuser offset latitude during electrophotographic printing of a raised multicolor image on a receiver member, the method comprising:
- forming a multicolor toner image on the receiver member with toners of at least three different colors of toner pigments, each having a color mass laydown;
- determining a function directly proportional to the sum of one or more color mass laydowns to optimize fuser offset latitude;
- forming a clear toner overcoat having a clear mass laydown upon the multicolor toner image wherein the clear mass laydown is controlled by the function of the sum;
- and
- fusing the clear toner overcoat and the multicolor toner image at a fusing temperature determined by one or more of one color mass laydown, the clear mass laydown and a nip width to provide good adhesion to the receiver member while optimizing fuser offset latitude.
A method of enhancing fuser offset latitude during electrophotographic printing of a raised multicolor image on a receiver member, the method comprising:
- forming a multicolor toner image on the receiver member with toners of at least three different colors of toner pigments, each having a color mass laydown;
- determining a function directly proportional to the sum of one or more color mass laydowns to control color shift;
- forming a clear toner overcoat having a clear mass laydown upon the multicolor toner image wherein the clear mass laydown is controlled by the function of the sum;
- and
- fusing the clear toner overcoat and the multicolor toner image at a fusing temperature determined by one or more of one color mass laydown, the clear mass laydown and a nip width to minimize color shifting all areas of said multicolor toner image.
A method of optimizing fuser offset latitude during electrophotographic printing (EP) of a raised multicolor image on a receiver member, the method comprising:
- creating an image data file having both a raised image data portion for one or more raised areas and non-raised image data portions for one or more non-raised areas;
- submitting the image data file to an EP printer;
- processing the image data file to distinguish between the raised and non-raised areas
- computing on a per pixel basis a NRML, the non-raised mass laydown (NRML;
- mg/cm2), as a sum of one or more color image toner (CMYK) laydowns for the non-raised areas;
- determining on a per pixel basis amount of clear overcoat mass laydown in the non-raised areas (OML;
- mg/cm2) for a given NRML, the non-raised mass laydown (NRML;
- mg/cm2);
- combining both a raised image data portion and the non-raised image data portions to create a final image data file;
- printing the final image data file including depositing toner.
Dependencies are inferred from the claim text.