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STORAGE OF OPERATING PARAMETERS IN MEMORY INTEGRAL WITH PRINTHEAD

IP.com Disclosure Number: IPCOM000025178D
Original Publication Date: 1983-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 61K

Publishing Venue

Xerox Disclosure Journal

Abstract

In ink jet marking modules having multi-jet printheads from which continuous streams of ink droplets are emitted by each nozzle of the printhead, it is known that operating parameters such as, for example, drop generator driver frequency, ink pressure, and drop charging phase vary from jet to jet within a printhead and from printhead to printhead. Because of the variations in operating parameters, replacement of a printhead assembly requires recalibration of the control elect-ronics. To facilitate installation of a printhead assembly, whether during manu-facturing or in a field situation, the printhead's previously measured operating parameters could be stored within a non-volatile memory device 14 affixed to the printhead assembly 10, as shown in the figure. When installation of the printhead is complete and the control electronics 12 initialized, the parameter data would be transferred to the control electronics for use as setpoint values. This strategy could also reduce the control electronics dynamic range requirements which depend on printhead to printhead parameter variations.

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(EROX DISCLOSURE JOURNAL

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STORAGE OF OPERATING PARAMETERS IN MEMORY INTEGRAL WITH PRINTHEAD Robert A. Lonis

Proposed Classification
U.S. C1. 346/75
Int. C1. Gold 15/18

PRINTHEAD

ASSEMBLY

i'

In ink jet marking modules having multi-jet printheads from which continuous streams of ink droplets are emitted by each nozzle of the printhead, it is known that operating parameters such as, for example, drop generator driver frequency, ink pressure, and drop charging phase vary from jet to jet within a printhead and from printhead to printhead. Because of the variations in operating parameters, replacement of a printhead assembly requires recalibration of the control elect- ronics. To facilitate installation of a printhead assembly, whether during manu- facturing or in a field situation, the printhead's previously measured operating parameters could be stored within a non-volatile memory device 14 affixed to the printhead assembly 10, as shown in the figure. When installation of the printhead is complete and the control electronics 12 initialized, the parameter data would be transferred to the control electronics for use as setpoint values. This strategy could also reduce the control electronics dynamic range requirements which depend on printhead to printhead parameter variations.

Volume 8 Number 6 November/December 1983 50 3

ADDRESS DATA

  CONTROL E L ECTR 0 N I CS

4

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DISCLOSURE XEROX 504 JOURNAL

Volume 8 N...