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DRUM-TYPE INK JET ORTHOGRAPHIC PRINTER

IP.com Disclosure Number: IPCOM000023932D
Original Publication Date: 1979-Apr-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 283K

Publishing Venue

Xerox Disclosure Journal

Abstract

An ink jet text printing engine is described consisting of the following: 1. A drum-typepaper transport system carrying a sheet of paper on either its outer or inner surface, with the vertical (as seen by the reader of the printed output) dimension of the paper parallel to the longitudinal axis of drum rotation;

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XEROX DISCLOSURE JOURNAL

DRUM~TYPEINK ~ET ORTHO~ ~PRINTER
William R~Gardner

Proposed Classification
U.S. CL 346/140 mt. CL GOld 15/16

An ink jet text printing engine is described consisting of the following:

1. A drum~typepaper transport system carrying a sheet of paper on either its outer or inner surface, with the vertical (as seen by the reader of the printed output) dimension of the paper parallel to the longitudinal axis of drum rotation;

2. a low~density, linear array of ink jets of the "drop~on~demand~type, oriented parallel to the longitudinal axis of the drum with its nozzles pointed toward the paper surface, inside or outside as dictated by paper location, each jet being responsible for printing a line of text;

3. mechanisms for rotating the drum and simultaneously translating the array longitudinally relative to the drum (or vice versa) by an amount equal to one scan line per revolution, the total translation being equal to the height of a printed text line;

4. appropriate mechanisms for loading and unloading the paper sheets; and

5. suitable electronic circuitry (character generators, etc.) for causing the individual ink jets to eject ink drops in the proper sequence for printing the textual information desired.

The figure schematically illustrates such a device, minus the loading/unloading mechanisms and associated electronics, with the paper carried on the outer surface of the drum.

Volume 4 Number 2 March/April 1979 247

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