Browse Prior Art Database

Ink Jet Printing Method

IP.com Disclosure Number: IPCOM000048318D
Original Publication Date: 1982-Jan-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bertschy, JR: AUTHOR [+3]

Abstract

U.S. Patent 4,097,873 describes a method of obtaining dual-resolution documents from an ink jet printing system having at least two sets of multiple linear arrays. The present article describes an alternate method of achieving dual-resolution documents from an ink jet printing system having a single set of multiple linear arrays. The present method allows a reproduced document to contain both high and low resolution print elements. This is accomplished by changing the velocity of the drop generator relative to the velocity of the printing substrate while also selecting whether a plurality of drops or a single drop is used to print each spot. A fast relative velocity is necessary for low the maximum resolution is obtained using the lower relative velocity and only single drops per spot.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 98% of the total text.

Page 1 of 1

Ink Jet Printing Method

U.S. Patent 4,097,873 describes a method of obtaining dual-resolution documents from an ink jet printing system having at least two sets of multiple linear arrays. The present article describes an alternate method of achieving dual-resolution documents from an ink jet printing system having a single set of multiple linear arrays. The present method allows a reproduced document to contain both high and low resolution print elements. This is accomplished by changing the velocity of the drop generator relative to the velocity of the printing substrate while also selecting whether a plurality of drops or a single drop is used to print each spot. A fast relative velocity is necessary for low the maximum resolution is obtained using the lower relative velocity and only single drops per spot. The change in the number of droplets used for printing is achieved by appropriately changing the microcode which drives the electronics in the system.

The major advantage of this system is that a one-drop generator can print at different resolutions. Ordinarily, one would expect that to print significantly different spot sizes, one would need different nozzle sizes and different transport mechanisms. The printing method only requires that the paper transport or the drop generator transport be capable of two or more speeds to enable the printing of two or more resolutions. Additionally, by altering the number of droplets per spot, one can extend the gray scal...