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Browse Prior Art Database

Helical Multiplexing Device for Stylus Arrays

IP.com Disclosure Number: IPCOM000053019D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Pennebaker, WB: AUTHOR

Abstract

This article describes a simple mechanical multiplexer for stylus arrays allowing a substantial reduction in the number of electronic drivers addressing the array.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

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Helical Multiplexing Device for Stylus Arrays

This article describes a simple mechanical multiplexer for stylus arrays allowing a substantial reduction in the number of electronic drivers addressing the array.

In stylus-based printing techniques such as electroerosion printing, there is a range of choices for the stylus configuration. At one extreme, the stylus array can extend across the full page width, eliminating the need for a carrier. At the other extreme, a carrier mechanism can be used to transport a few styli across the print line.

In technologies such as electroerosion printing, there is no well-defined threshold for writing. Consequently, each stylus must be driven separately by dedicated circuitry. Thus, the full page width array requires a large number of drivers. For the carrier mounted styli, the electronic costs are low but the mechanical complexity of the carrier is costly.

The multiplexing device described in this article offers a compromise between mechanical complexity and electronic complexity. The basic concept is related to the bar-helix impact printer, and to a bar-helix electroerosion printer. In this latter device, the bar is placed behind the electroerosion paper and used to deform the paper so as to create a well-defined point of contact between the paper and the rotating helix. However, this printer does not provide sufficient resolution for acceptable print quality.

In the structure disclosed herein, a rotating helix is also used, but the function of the helix is to...