Browse Prior Art Database

Spark Erosion across an Air Bearing

IP.com Disclosure Number: IPCOM000084920D
Original Publication Date: 1976-Jan-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 22K

Publishing Venue

IBM

Related People

Paton, A: AUTHOR [+2]

Abstract

A spark erosion printer includes a high-voltage probe 3, which for example, may be made from tungsten. The probe 3 is spaced a finite distance from a recording medium 4 by an air bearing 5 and is selectively energized from a high-voltagc source 6.

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Spark Erosion across an Air Bearing

A spark erosion printer includes a high-voltage probe 3, which for example, may be made from tungsten. The probe 3 is spaced a finite distance from a recording medium 4 by an air bearing 5 and is selectively energized from a high- voltagc source 6.

The recording medium 4 is comprised of a flexible backing member 7, having a metal coating 8, for example, aluminum formed thereon, with the coating 8 being connected to circuit ground. A dielectric coating 9 is formed over the metal coating 8.

With a field strength on the order of 100 volts/micron across the air bearing 5, the dielectric coating 9 breaks down which initiates conduction across the air gap 5 through to the metal coating 8 for marking the same. Accordingly, by selectively energizing the probe 3, or an array of such probes, a print pattern is formed on the marking medium 4.

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