Curved print head for charged particle generation
AssigneeLogical Imaging Solutions, Inc.
InventorsMichael W. Brennan, William G. Read, William S. Read
Life of this patent
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Abstract
A curved print head is used for generating charged particles at a number of apertures and emitting those charged particles from the apertures to a cylindrical drum. The print head has a radius of curvature larger than the radius of curvature of the drum. The difference in the radius of curvature of the print head and the radius of curvature of the drum is limited by the variation in electric field strength deposited on the drum across the width of the print head.
Claims9
A curved print head for electrostatic printing, said print head being cylindrically concave to and for use with a cylindrical drum having an axis and a radius of curvature comprising:
- a first electrode extending substantially parallel to the axis of the drum and having a radius of curvature larger than the radius of curvature of the drum, wherein said first electrode is placed relative to the drum such that the distance between said first electrode and the drum varies across the width of the first electrode and extending substantially parallel to the axis of the drum;
- a second electrode having a radius of curvature larger than the radius of curvature of the drum, wherein said second electrode is placed relative to the drum such that the distance between said second electrode and the drum varies across the width of the second electrode;
- said first and said second electrode having a radius of curvature substantially similar to the radius of curvature of the curved print head;
- and
- a dielectric between said first and said second electrode.
A curved print head for electrostatic printing, said print head being cylindrically concave to and for use with a cylindrical drum having an axis and a radius of curvature comprising:
- a first electrode extending substantially parallel to the axis of the drum and having a radius of curvature larger than the radius of curvature of the drum, wherein said first electrode is placed relative to the drum such that the distance between said first electrode and the drum varies across the width of the first electrode;
- a second electrode extending at an angle to the first electrode to form a discharge site and having a radius of curvature larger than the radius of curvature of the drum, wherein said second electrode is placed relative to the drum such that the distance between said second electrode and the drum varies across the width of the second electrode;
- a first dielectric between said first electrode and said second electrode;
- a third electrode having a radius of curvature larger than the radius of curvature of the drum, wherein said third electrode is placed relative to the drum such that the distance between said second electrode and the drum varies across the width of the third electrode;
- said first, said second and said third electrode having a radius of curvature substantially similar to the radius of curvature of the curved print head;
- and
- a dielectric between said first and said second electrode.
Dependencies are inferred from the claim text.