Browse Prior Art Database

THERMAL PULSE SHAPING IN CONTINUOUS THERMAL INK JET USING MULTIPLE HEATER RESISTORS

IP.com Disclosure Number: IPCOM000026360D
Original Publication Date: 1991-Aug-31
Included in the Prior Art Database: 2004-Apr-05
Document File: 4 page(s) / 112K

Publishing Venue

Xerox Disclosure Journal

Abstract

In conventional continuous ink jet printing, an acoustic drop generator uses an acoustic wave to cause stable and repeatable drop formation. By adding harmonic components to the fundamental acoustic wave, the formation of undesired secondary satellite drops is eliminated. U.S. Patent 4,638,328 describes a type of continuous ink jet drop generation by thermally pulsing a resistor located in each ink channel near the ink emitting nozzle. Undesired secondary satellite drops can be eliminated from this type of ink jet printer by modifying the fundamental thermal pulse. The thermal pulse may be modified by simply supplying a shaped (in time) current pulse to the resistor.

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 55% of the total text.

Page 1 of 4

XEROX DISCLOSURE JOURNAL

THERMAL PULSE SHAPING IN CONTINUOUS THERMAL INK JET USING MULTIPLE HEATER RESISTORS
Donald J. Drake

Proposed Classification US. C1.346/75
Int. C1. GOlD 15/18

FIG. 7

XEROX DISCLOSURE JOURNAL - Vol. 16, No. 4 July/August 1991 217

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

Page 2 of 4

THERMAL PULSE SHAPING IN CONTINUOUS THERMAL INK JET USING MULTIPLE HEATER RESISTORS(Cont'd)

14

/

10

218 XEROX DISCLOSURE JOURNAL - Vol. 16, No. 4 July/August 1991

1 \ 16 '

FIG. 2

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

Page 3 of 4

THERMAL PULSE SHAPING IN CONTINUOUS THERMAL INK JET USING MULTIPLE HEATER RESISTORS(Cont'd)

In conventional continuous ink jet printing, an acoustic drop generator uses an acoustic wave to cause stable and repeatable drop formation. By adding harmonic components to the fundamental acoustic wave, the formation of undesired secondary satellite drops is eliminated. U.S. Patent 4,638,328 describes a type of continuous ink jet drop generation by thermally pulsing a resistor located in each ink channel near the ink emitting nozzle. Undesired secondary satellite drops can be eliminated from this type of ink jet printer by modifying the fundamental thermal pulse. The thermal pulse may be modified by simply supplying a shaped (in time) current pulse to the resistor.

Another method of modifying the fundamental thermal pulses is to utilize more than one resistor in the ink channel. As disclosed in the above- mentioned U.S. Patent, the printhead comprises two parts, a channel plate and a heater plate. Figures 1 and 2 show an...