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US 6,145,964 AGranted
Contragraphy apparatus having an electrode arrangement useful for contragraphy printing
AssigneePelikan Produktions AG
InventorGunter Jakob Peter
Life of this patent
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Abstract
The electrode arrangement (1) consists of a dielectric substrate (2) on which there are several electrodes (4) with terminal leads. A dielectric layer (6) extends over the electrodes (4) over which there is a screening electrode (7) with an aperture (8) for each of the electrodes (4). The arrangement is especially suitable for a contragraphy apparatus. It can be economically produced.
Claims9
An electrode arrangement for contragraphy printing using electrically charged pigment particles, the arrangement comprising:
- at least one electrode connected with a conductor;
- a dielectric carrier upon which the electrode is tabularly arranged as a metal layer;
- a dielectric intermediate layer covering the electrode;
- and,
- a shield grid arranged as a thin metal layer above the intermediate layer, the shield grid defining at least one opening having a free area above the electrode, the electrode extending unobstructed over an area greater than the free area of the opening.
2 more elements
A contragraphy instrument comprising:
- an electrode arrangement including at least one electrode connected with a conductor, a dielectric carrier upon which the electrode is tabularly arranged as a metal layer, a dielectric intermediate layer covering the electrode and a shield grid arranged as a thin metal layer above the intermediate layer, the shield grid defining at least one opening having a free area above the electrode, the electrode extending unobstructed over an area greater than the free area of the opening;
- a developer device for conducting electrostatically charged pigment particles next to the electrode;
- a supply device for passing an information carrier between the developer device and the electrode arrangement.
Dependencies are inferred from the claim text.