Browse Prior Art Database

RELIABLE CONSTRUCTION OF A THERMAL INK JET FULL WIDTH ARRAY PRINT BAR

IP.com Disclosure Number: IPCOM000027869D
Original Publication Date: 2001-Jun-30
Included in the Prior Art Database: 2004-Apr-09
Document File: 2 page(s) / 48K

Publishing Venue

Xerox Disclosure Journal

Abstract

Disclosed is a bar construction that improves reliability of a Thermal Ink Jet (TLT) Full Width Array (FWA) print bar without improving inherent jet reliability. The FWA is broken bar into N individually replaceable units such that function wise, the assembled units act like a FWA. Thus, a failure of one or more jets represents a failure of the replacement unit containing the jets and not the whole bar. In this manner, reliability is improved by a factor of:

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 100% of the total text.

Page 1 of 2

XEROX DISCLOSURE JOURNAL

RELIABLE CONSTRUCTION OF A THERMAL INK JET FULL WIDTH ARRAY PRINT BAR
Dineshchandra S. Shah

Proposed Classification
U. S. C1.347/042 Int. C1. B41j 02/155

Disclosed is a bar construction that improves reliability of a Thermal Ink Jet (TLT) Full Width Array (FWA) print bar without improving inherent jet reliability. The FWA is broken bar into N individually replaceable units such that function wise, the assembled units act like a FWA. Thus, a failure of one or more jets represents a failure of the replacement unit containing the jets and not the whole bar. In this manner, reliability is improved by a factor of:

where p is the shape parameter of the failure distribution of a jet.

For example, using 13 butted dies to form a FWA bar, the failure of a single jet represents the failure of the whole bar. However, if these 13 dies are individually replaceable, failure of a single jet only represents the failure of the die containing the jet and not the whole bar. Assuming p = 3 , the reliability improvement factor equals:

1

13j

or 2.35.

DP5941

Xerox Disclosure Journal - Vol. 25, No. 3 May/June 2001 117

[This page contains 1 picture or other non-text object]

Page 2 of 2

118 Xerox Disclosure Journal - Vol. 25, No. 3 MayIJune 2001

[This page contains 1 picture or other non-text object]