Process and apparatus for rendering visible charge images
First Claim
Patent Images
1. A process for rendering visible an electrostatic charge image by deforming the surface of a liquid having a resistivity of between 106 and 1016 ohm·
- cm and a polarizability of between about 5·
10-24 and 20·
10-24 cm3 and being present in a thickness of 10 to 100 μ
m on one of a metallic and dielectric support into a reversible, optically readable relief image, comprising the steps of positioning the electrostatic charge image producing the relief image--during the period in which the charge image is made visible--at a distance of about 10 to 1,000 μ
m from the surface of the liquid without contacting said liquid.
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Abstract
A process and apparatus for rendering visible an electrostatic charge image. The visible image is formed on the surface of a liquid by positioning a charge image adjacent the liquid at distances of about 10 to 1,000 μm from the surface of the liquid without contacting the liquid.
174 Citations
11 Claims
-
1. A process for rendering visible an electrostatic charge image by deforming the surface of a liquid having a resistivity of between 106 and 1016 ohm·
- cm and a polarizability of between about 5·
10-24 and 20·
10-24 cm3 and being present in a thickness of 10 to 100 μ
m on one of a metallic and dielectric support into a reversible, optically readable relief image, comprising the steps of positioning the electrostatic charge image producing the relief image--during the period in which the charge image is made visible--at a distance of about 10 to 1,000 μ
m from the surface of the liquid without contacting said liquid. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9, 10, 11)
- cm and a polarizability of between about 5·
-
4. A process for rendering visible an electrostatic charge image by deforming the surface of a liquid having a resistivity of between 106 and 1016 ohm·
- cm and a polarizability of between about 5·
10-24 and 20·
10-24 cm3 and being present in a thickness of 10 to 100 μ
m on one of a metallic and dielectric support into a reversible, optically readable relief image, comprising the steps of positioning the electrostatic charge image producing the relief image--during the period in which the charge image is made visible--at a distance of about 50 to 150 μ
m from the surface of the liquid without contacting said liquid.
- cm and a polarizability of between about 5·
Specification