Browse Prior Art Database

Method for Raster Scan Ink Jet

IP.com Disclosure Number: IPCOM000088267D
Original Publication Date: 1977-May-01
Included in the Prior Art Database: 2005-Mar-04
Document File: 2 page(s) / 38K

Publishing Venue

IBM

Related People

Polsgrove, JS: AUTHOR

Abstract

This article describes an ink jet raster printer in which the printhead is rotatable a predetermined angular amount in the horizontal plane to achieve the horizontal scan. The ink jet raster is created in the vertical plane utilizing standard electrostatic deflection, whereas the horizontal scan is accomplished by rotating the printhead, that is, the nozzle, deflection plates, etc., as the carrier steps in the horizontal plane.

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Method for Raster Scan Ink Jet

This article describes an ink jet raster printer in which the printhead is rotatable a predetermined angular amount in the horizontal plane to achieve the horizontal scan. The ink jet raster is created in the vertical plane utilizing standard electrostatic deflection, whereas the horizontal scan is accomplished by rotating the printhead, that is, the nozzle, deflection plates, etc., as the carrier steps in the horizontal plane.

The printhead is mounted on a carrier as in a typewriter, with the utilization of a rotatable printhead allowing a constant stepping motion of the carriage from left to right, obviating the need for the carrier to be moved alternately in both directions to accomplish the scan velocity.

A printhead 2 is shown as a round symmetrical device for purposes of illustration. The direction of rotation of the head is clockwise as indicated by the arrow 4 for a left to right printed page. The head is oriented at a home position, as indicated at 6, when the stream is off, and rotates to a start position, as indicated at 8, at the start of the scan when the stream is on. Accordingly, the stream prints from the position 10 to the position 12, as the carrier moves a fixed increment from left to right.

The printhead is indicated at 2' for the next incremental printing operation, with the home position being indicated at 14 and the on position being indicated at 16, with the incremental printing taking place between the posit...