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WO2012066360A1 - Améliorations apportées aux imprimantes à jet d'encre ou s'y rapportant - Google Patents

Améliorations apportées aux imprimantes à jet d'encre ou s'y rapportant Download PDF

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Publication number
WO2012066360A1
WO2012066360A1 PCT/GB2011/052279 GB2011052279W WO2012066360A1 WO 2012066360 A1 WO2012066360 A1 WO 2012066360A1 GB 2011052279 W GB2011052279 W GB 2011052279W WO 2012066360 A1 WO2012066360 A1 WO 2012066360A1
Authority
WO
WIPO (PCT)
Prior art keywords
ink
viscosity
temperature
printer
data
Prior art date
Application number
PCT/GB2011/052279
Other languages
English (en)
Inventor
Jonathan Morgan
Steven Geoffrey Luke
Stephen Edwin Chapman
Original Assignee
Domino Printing Sciences Plc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Domino Printing Sciences Plc filed Critical Domino Printing Sciences Plc
Publication of WO2012066360A1 publication Critical patent/WO2012066360A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B41J2/17503—Ink cartridges
    • B41J2/17543—Cartridge presence detection or type identification
    • B41J2/17546—Cartridge presence detection or type identification electronically
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/175—Ink supply systems ; Circuit parts therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01—Ink jet
    • B41J2/17—Ink jet characterised by ink handling
    • B41J2/195—Ink jet characterised by ink handling for monitoring ink quality

Definitions

  • This invention relates to a continuous inkjet (CIJ) printer and, in particular, to a method for allowing ink viscosity and temperature data to be entered into printer.
  • CIJ continuous inkjet
  • Continuous inkjet printing involves the formation of electrically charged drops from a jet of ink and the subsequent deflection of the charged drops by an electric field to produce an image on a print medium.
  • electrically-conducting ink is forced through a nozzle by applying pressure to the ink.
  • the velocity of the jet requires control; often achieved by control of the constituency of the ink in conjunction with controlling the pressure.
  • Pressure control is usually achieved by varying the speed of the pump producing the flow with feedback from a pressure transducer. Feedback may also be derived from a velocity measurement device.
  • the constituency of the ink at a constant composition is normally achieved by controlling the ink viscosity. This involves adding one or more solvents to replace the solvents that have evaporated from running the continuous jet.
  • the jet of ink is formed into a controlled sequence of drops, each with an identical drop volume and with constant separation between adjacent drops, by a process termed modulation.
  • Modulation gives active and controlled drive to the natural process of jet break up.
  • Drop formation is usually achieved by modulating the ink pressure in a sinusoidal way at fixed frequency and amplitude, or by modulating the ink velocity relative to the nozzle.
  • a range of options and techniques to introduce pressure modulation, velocity modulation or a combination of both so that uniform drop sequences are obtained are known.
  • Drops to be printed are charged by capacitive coupling via charged plates in synchronization with the formation of the individual drops.
  • the amount of charge collected by each drop depends on many factors, including the potential of the charged plates, the accuracy of the synchronization of charging with drop formation and the composition of the ink.
  • the drops After charging, the drops travel through a constant electric field with field lines perpendicular to the jet. Charged drops are deflected by an amount that approximately scales with the charge on the drops. The electric field is formed by applying a high potential difference between two surfaces. Unused (uncharged) drops are collected by a gutter for ink re-flow and re-use. Printed drops are carried by their momentum until they settle upon a substrate to form a printed image.
  • the end user properties of the ink are affected by its composition. It has been demonstrated in the prior art that the control of viscosity is a convenient and effective means to achieve the control of ink composition. It is known therefore, by those skilled in the art, that the control of viscosity is closely related to the reliability of the printer.
  • Most continuous ink jet printers thus contain a means to measure viscosity, and a sensor to measure the temperature of the ink when its viscosity is characterized since for most fixed ink compositions, the viscosity of the ink will vary with temperature.
  • the printer compares the measured viscosity and temperature with values stored in a look up table and adds solvent to the ink if the measured viscosity is higher than the target viscosity. This storing of viscosity/temperature curves allows the printer to be configured to specific ink types.
  • Continuous ink jet printing inks are developed to give optimum performance in relation to two key constraints: a set of end user properties required for the desired interaction with the substrate, and the need to operate reliably within the printer.
  • the formulation of inks is particularly difficult to achieve because the process of turning streams of ink into droplets tends to form small droplets, that are satellite to the printing droplet, unless steps are taken to prevent their formation.
  • the presence of satellites often leads to printer failure as the small drops have a higher charge-to-mass ratio than the printing drops and are consequently deflected further by the aforementioned electric fields. This results in the print head becoming coated with ink and, ultimately, leads to printer failure.
  • satellites can be suppressed by the selection of appropriate ingredients that affect the dynamic viscosity behaviour of the ink and the polymer formulation.
  • the prediction of dynamic viscosity behaviour from molecular structure is non-trivial and so often heuristic methods are used in ink formulation.
  • One well known method for suppressing satellites uses polymers with well defined molecular weight distributions, however it is also commonly observed that two apparently identical polymer samples from different manufacturers can produce inks that have very different jetting properties. Further, from time-to-time polymer manufacturers modify or withdraw specific types of polymers necessitating a change in ink formulation. It should be clear from the preceding discussion that the task of replacing withdrawn materials is not as simple as finding an equivalent polymer from an alternate manufacturer, and using it.
  • the ink formulator will need to adjust other physical parameters such as density and viscosity to achieve good jetting behaviour.
  • look up tables for a particular ink presents a further problem for the ink formulator in that an ink needs to be produced that mimics the viscosity/ temperature look up table stored in the installed base of printers or, alternatively, the look-up tables within the installed base of printers must be changed.
  • the upgrade of software to change viscosity/temperature look-up tables for an installed base of continuous inkjet printers is extremely expensive and therefore presents a problem.
  • the invention provides a method of loading ink data into a control system of a continuous inkjet printer said method including embedding viscosity data within a code which includes the parameters of a mathematical function used to model the temperature/viscosity of the ink.
  • a code which includes the parameters of a mathematical function used to model the temperature/viscosity of the ink.
  • said data is provided in the form of two distinct codes.
  • said code is provided on an ink cartridge configured for fitting to said printer.
  • one of said codes represents viscosity/temperature data of an ink known to be suitable for a printer whilst the other of said codes contains data representative of a different formulation of ink.
  • the invention provides a method of configuring the electronic control system of a continuous inkjet printer said method including the step of programming said control system to calculate a relationship between viscosity and temperature for an ink using data derived from a code supplied with a cartridge containing said ink.
  • Preferably said method includes programming said control system to calculate a viscosity/temperature curve according to the expression:
  • the invention provides an ink cartridge having a plurality of security codes thereon.
  • codes are for use in the method set forth above.
  • Figure 1 shows an image of an ink cartridge label including coding
  • Figure 2 shows a plot of Arrhenius factors for a variety of printing inks.
  • the invention resides in embedding viscosity data within a security code, preferably in the form of two 8-bit words, that are the parameters of a mathematical function used to model the temperature/viscosity of the ink.
  • the printer control system is configured to read the codes and, if necessary, to calculate a viscosity/temperature curve using data derived from the code. This allows the control function to be modified each time fresh ink is added to the printer.
  • T temperature
  • ⁇ 0 is a coefficient
  • E is the activation energy
  • R is the universal gas constant or in mathematically equivalent form: where ⁇ is viscosity T is temperature, a' is the pre-exponential factor and b' the exponent.
  • ink viscosity and temperature can be defined with two parameters, a' and b' .
  • both viscosity and temperature must be expressed as two significant figures.
  • the viscosity must be characterised between 2-6cPs to one decimal place.
  • the temperature needs to be characterised in °C to the nearest 1°C.
  • printers originating from the present applicant prompt the user to enter a quality code when a reservoir or cartridge is added.
  • This code contains such information as a use-buy date (as the ink has a shelf life) and ink type. Based on the ink type the printer selects the appropriate viscosity/temperature curve from a look-up table.
  • the existing security code has been modified so that it contains a revision number for the viscosity table. If, on the first code being entered into the control system, the revision number is different from the version number of the viscosity table contained within the printer, then the user will be prompted to enter the second code that contains the revised viscosity information which enables the printer to calculate a new viscosity/temperature relationship in the manner described above.
  • an ink cartridge label 5 is shown having a first (ICC) code indicated at 6 and a second (EID) code indicated at 7.
  • the printer control panel will prompt the operator to enter the first (ICC) code. If the revision number embedded with the first code is the same as that held in the printer control system, then the printer will operate in the normal manner. If, however, there has been a change in ink formulation leading to a change in the viscosity/temperature relationship, then the first code will include a revision number that differs from that in the printer control system. This will prompt the printer to call for the second (EID) code to be entered. From the data embedded in the EID code, the control system can then calculate a new viscosity/temperature curve to be applied; and update the revision number.
  • inkjet printers must have the ability to operate using a wide range of printing inks based on a range of solvents.
  • the calculated values of a' and b' were analysed for a range of inks, containing either methyl ethyl ketone, ethanol or acetone as the primary solvent, to see if there was a relationship between the parameters that could be used as a design rule.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)

Abstract

La présente invention concerne un procédé de mise en œuvre de données dans un code de sécurité et de programmation du système de commande d'une imprimante à jet d'encre continu pour extraire les données du code et, l'utilisation de ces données, pour calculer une relation viscosité/température.
PCT/GB2011/052279 2010-11-19 2011-11-21 Améliorations apportées aux imprimantes à jet d'encre ou s'y rapportant WO2012066360A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1019680.6A GB201019680D0 (en) 2010-11-19 2010-11-19 Improvements in or relating to inkjet printers
GB1019680.6 2010-11-19

Publications (1)

Publication Number Publication Date
WO2012066360A1 true WO2012066360A1 (fr) 2012-05-24

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Family Applications (1)

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PCT/GB2011/052279 WO2012066360A1 (fr) 2010-11-19 2011-11-21 Améliorations apportées aux imprimantes à jet d'encre ou s'y rapportant

Country Status (2)

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GB (1) GB201019680D0 (fr)
WO (1) WO2012066360A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160067962A1 (en) * 2014-09-04 2016-03-10 Markem Imaje Holding Method for managing ink quality of an inkjet printer versus temperature
US11097550B2 (en) 2016-05-11 2021-08-24 Videojet Technologies Inc. Electronic data storage device for use with a cartridge for storing and dispensing liquid for use with a printer

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997028001A1 (fr) * 1996-02-01 1997-08-07 Imaje S.A. Imprimante industrielle apte a recevoir au moins une cartouche de consommable
US6019461A (en) * 1995-05-19 2000-02-01 Oki Data Corporation Printer and printing cartridge therefor
US20040218026A1 (en) * 2003-01-29 2004-11-04 Masaki Matsushita Image forming apparatus
US20050168510A1 (en) * 2004-01-30 2005-08-04 Konica Minolta Holdings, Inc. Inkjet recording apparatus and control method of inkjet recording apparatus
EP1568504A2 (fr) * 2000-11-27 2005-08-31 Océ-Technologies B.V. Procédé pour fournir des récipients d'encre remplis d'encre
US20060215000A1 (en) * 2005-03-28 2006-09-28 Fuji Photo Film Co., Ltd. Ink-jet recording apparatus, ink container, and method of filling ink container
US20060290753A1 (en) * 2005-06-28 2006-12-28 Fuji Photo Film Co., Ltd. Ink container and ink jet recording apparatus
US20070030321A1 (en) * 1998-10-16 2007-02-08 Silverbrook Research Pty Ltd Ink supply unit for an ink jet printer

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6019461A (en) * 1995-05-19 2000-02-01 Oki Data Corporation Printer and printing cartridge therefor
WO1997028001A1 (fr) * 1996-02-01 1997-08-07 Imaje S.A. Imprimante industrielle apte a recevoir au moins une cartouche de consommable
EP0877666A1 (fr) 1996-02-01 1998-11-18 Imaje S.A. Imprimante industrielle apte a recevoir au moins une cartouche de consommable
US20070030321A1 (en) * 1998-10-16 2007-02-08 Silverbrook Research Pty Ltd Ink supply unit for an ink jet printer
EP1568504A2 (fr) * 2000-11-27 2005-08-31 Océ-Technologies B.V. Procédé pour fournir des récipients d'encre remplis d'encre
US20040218026A1 (en) * 2003-01-29 2004-11-04 Masaki Matsushita Image forming apparatus
US20050168510A1 (en) * 2004-01-30 2005-08-04 Konica Minolta Holdings, Inc. Inkjet recording apparatus and control method of inkjet recording apparatus
US20060215000A1 (en) * 2005-03-28 2006-09-28 Fuji Photo Film Co., Ltd. Ink-jet recording apparatus, ink container, and method of filling ink container
US20060290753A1 (en) * 2005-06-28 2006-12-28 Fuji Photo Film Co., Ltd. Ink container and ink jet recording apparatus

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160067962A1 (en) * 2014-09-04 2016-03-10 Markem Imaje Holding Method for managing ink quality of an inkjet printer versus temperature
FR3025454A1 (fr) * 2014-09-04 2016-03-11 Markem Imaje Holding Procede de gestion de la qualite de l'encre d'une imprimante a jet d'encre en fonction de la temperature.
CN105404480A (zh) * 2014-09-04 2016-03-16 马肯依玛士控股公司 用于管理相对温度的喷墨印刷机油墨质量的方法
EP2995462A1 (fr) * 2014-09-04 2016-03-16 Markem-Imaje Holding Procédé de gestion de la qualité de l'encre d'une imprimante a jet d'encre en fonction de la température
US10144216B2 (en) 2014-09-04 2018-12-04 Markem-Imaje Holding Method for managing ink quality of an inkjet printer versus temperature
US11097550B2 (en) 2016-05-11 2021-08-24 Videojet Technologies Inc. Electronic data storage device for use with a cartridge for storing and dispensing liquid for use with a printer
US11654687B2 (en) 2016-05-11 2023-05-23 Videojet Technologies Inc. Electronic data storage device for use with a cartridge for storing and dispensing liquid for use with a printer

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