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INK RECONSTITUTION FOR A CONTINUOUS STREAM INK PRINTING SYSTEM

IP.com Disclosure Number: IPCOM000025827D
Original Publication Date: 1988-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 96K

Publishing Venue

Xerox Disclosure Journal

Abstract

In a continuous stream-type ink jet printing process, the solvent in the ink evaporates while the ink droplets that are not to be printed travel from the generator to the gutter for collection and recirculation to the ink supply. Therefore, some means of reconstitution is required to maintain the ink properties at operating levels.

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CEROX *DISCLOSURE JOURNAL

INK RECONSTITUTION FOR A Proposed Classification CONTINUOUS STREAM INK PRINTING U.S. C1.346/75 SYSTEM Int. C1. Gold 15/18 Paul J. Kim

16

II

HEATER

BY

'PASS

PUMP

n I I

34 11

FLUID TANK

-- SOLENOID VALVE

+

I I

Volume 13 Number 3 May/June 1988 125

[This page contains 2 pictures or other non-text objects]

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INK RECONSTITUTION FOR A CONTINUOUS STREAM INK PRINTING SYSTEM (Cont'd)

An optical sensor 22 detects the presencelabsence of the stream and generates an electrical signal which is sent to the controller 24 to opedclose a solenoid valve 26 on the reconstitution fluid reservoir 28. Servo pump 30 and ink heater 32 supplies ink to the bubble trap container 16 from the ink supply tank 20 and maintains the ink in the container at the proper pressure and temperature.

As evaporation occurs when the ink droplets are traveling through the air or for other reasons, the trajectory of the ink stream 17 will change. This change is sensed by the sensor 22 sending electrical signals representing the change to the controller 24 which opens the solenoid valve 26 and sends reconstitution fluid into the pump ink supply line 34. The solenoid valve is not closed until the trajectory of the ink stream 17 returns to its desired or normal position. This system enables an ink printing system to be automatically reconstituted.

In a continuous stream-type ink jet printing process, the solvent in the ink evaporates while the ink droplets that are not to be...