EP0447521B1 - Circuit d'encre notamment destine a la mise en pression d'une encre a pigments pour imprimante a jet d'encre - Google Patents

Circuit d'encre notamment destine a la mise en pression d'une encre a pigments pour imprimante a jet d'encre Download PDF

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Publication number
EP0447521B1
EP0447521B1 EP90914741A EP90914741A EP0447521B1 EP 0447521 B1 EP0447521 B1 EP 0447521B1 EP 90914741 A EP90914741 A EP 90914741A EP 90914741 A EP90914741 A EP 90914741A EP 0447521 B1 EP0447521 B1 EP 0447521B1
Authority
EP
European Patent Office
Prior art keywords
ink
reservoir
recovery
circuit according
circuit
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
EP90914741A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0447521A1 (fr
Inventor
Max Perrin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Markem Imaje SAS
Original Assignee
Imaje SA
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 Imaje SA filed Critical Imaje SA
Publication of EP0447521A1 publication Critical patent/EP0447521A1/fr
Application granted granted Critical
Publication of EP0447521B1 publication Critical patent/EP0447521B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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

  • the invention relates to an ink circuit in particular intended for pressurizing a pigment ink for an ink jet printer.
  • the object of the invention is to overcome the drawbacks linked to the presence of pumps or compressed air tanks of the known art, while allowing the implementation of the viscosity measurement method described in French patent no. 2,553,341. It relates to a general ink circuit comprising a first pressurization circuit and a second vacuum circuit independent of the first, operating from means which are never in contact with the ink. In this circuit, means of agitating the ink make it possible to avoid any risk of sedimentation of pigments where they are to be feared.
  • the invention relates more precisely to an ink circuit according to claim 1.
  • a circuit according to the invention a fourth which is a function of permanent agitation of the ink in order to avoid the sedimentation of the pigments in the bottom of the tanks.
  • the pressurization of the ink to ensure the jet is carried out by means of an ink accumulator tank (6) which is put under air pressure.
  • the generation of compressed air is ensured through a first pressurization circuit by a first head (9) of a compressor (7).
  • the air passes through a first filter (8) associated with a silencer, then passes through a second filter, made of filter foams, located inside the first head (9) also called pressure head.
  • the air flow rate from this head is 1.6 m3 / hour at atmospheric pressure.
  • a calibrated valve (10) at a threshold value, for example 4.2 bars limits the maximum operating pressure in the circuit.
  • the air passing through the pipe (40) then passes through a regulator (11) capable of adjusting the pressure with precision before pressurizing the ink accumulator tank (6) which supplies the print head not shown because being part of known art.
  • An arrow (f1) shows diagrammatically the ink output from the accumulator (6) towards the umbilicus and its print head.
  • the pressure setpoint of the regulator (11) is adjusted by adjustment means (111) which can be the combination of a screw and a handwheel for example.
  • This pressure is controlled using a pressure gauge (12) mounted through a three-way connection (62) on the pressurization pipe (40).
  • the unused drops are recovered in a gutter not shown as being part of the print head, itself known per se, as has been said previously.
  • These recovered drops are brought back to a recovery tank (2) as shown by the arrow (f2), arranged on the recovery pipe (41).
  • the recovery tank (2) is placed under vacuum by means of a second vacuum circuit consisting of a second head (15) of the compressor (7) operating as a vacuum pump.
  • This vacuum head (15) is identical to the pressure head (9) and its flow / pressure characteristics are the same.
  • a safety valve (16) calibrated to a limit value of the tolerable vacuum in the recovery tank (2) and at the outlet of the head (15) a filter associated with a silencer ( 17). Depression is symbolized by the arrow (f3).
  • the means for pressurizing and vacuuming respectively constituted by the first circuit comprising the general pipe (40) and the second circuit comprising the pipe (42), are distinct from each other and connected to two heads (9) and (15) of a single compressor (7) whose operation ensures the pressurization of the accumulator tank (6) supplying the print head and the partial vacuum of the recovery tank (2), these two pipes (40) and (42) being, moreover, completely independent of the lines in which the ink circulates.
  • the ink is indeed highly volatile, so its viscosity must be constantly checked and corrected by adding either ink or solvent.
  • a solvent tank (20) and an ink tank (1) are provided, connected to each other, via a filter (50s) and (50e), and through a solenoid valve (18th ) and (18s), at the top of the recovery tank (2) through the pipes (51s) and (51e).
  • the two tanks of solvent (20) and ink (1) are at atmospheric pressure.
  • the ink tank (1) is connected to the compressed air line (40) (pressurization circuit) through two solenoid valves (24) and (25). It is also connected to the transfer tank (27) by the pipe (47) via the solenoid valve (24).
  • a viscometer (27) which is, for example, of the type described in French patent No. 2,353,441 filed by the Applicant. It is a tank in which the ink from the recovery tank (2) passes before being sent to the accumulator tank (6).
  • This viscometer (27) is connected by a line (44), via a solenoid valve (21), to the base of said recovery tank (2) and by a line (45) via a solenoid valve (23) to the base of the accumulator tank (6).
  • the ink tank (1), the recovery tank (2), and the viscometer (27) are equipped with level detection means (28e), (28a), (28). These are electrodes immersed in the tank at heights corresponding for the ink tank (1) to the minimum level (V) of ink, for the recovery tank with three levels, low (V1), medium ( V2) and high (V3), finally for the two-level viscometer (V4) and (V5).
  • the difference in height between (V4) and (V5) constitutes one of the parameters authorizing the measurement of the viscosity, as is now explained.
  • the level measurement means (28) attached to the viscometer (27) consist of three plunging electrodes, two of which are at the same low level (V4) and the third at a level (V5) higher than (V4).
  • the level measuring means (28e) attached to the ink tank (1) are constituted by two electrodes determining the level (V).
  • the level measuring means (28r) attached to the recovery tank (2) consist of four plunging electrodes determining three levels (V1), (V2), (V3).
  • the solenoid valves (21) and (22) being open, the pressure of the viscometer (27) is in equilibrium with that of the recovery tank (2), the ink flows into the line (44) through a calibrated leak ( 26) and passes into the viscometer (27).
  • the time taken for the level to pass from (V4) to (V5) is measured. If this time is greater than a set value, the viscosity of the ink is too high and an addition of solvent is carried out. If this time is less than or equal to this set value, the viscosity of the ink is low or good and nothing will be done. Natural evaporation of the solvent will increase it.
  • the solenoid valve (24) is then closed and the solenoid valves (21), (22) are again open for refilling the viscometer (27).
  • the solvent (20), ink (1) and recovery (2) tanks have a drain port (100).
  • all the ink contained in the accumulator tank (6) is returned to the recovery tank (2), so that the ink is stirred as will be explained later.
  • the solenoid valves (23) and (21) are open, and under the effect of the air pressure in the accumulator tank (6), the ink passes into the recovery tank (2).
  • the solenoid valve (23) is closed and the solenoid valve (24) open to also empty the viscometer (27) in the recovery tank (2). Indeed, the atmospheric pressure thus applied in the viscometer pushes the ink towards the recovery tank (2) which is under vacuum.
  • means are provided for continuously agitating the ink. Indeed, in order to maintain good homogeneity thereof, regardless of its duration of use, it is imperative to mix the ink constantly.
  • the ink is mixed in the main new ink tank (1) and in the recovery tank (2).
  • the means are identical in both cases. It is a magnetic bar (3) covered with polytetrafluoroethylene (PTFE) or polypropylene, cooperating with two magnets (4) (visible in Figure 2) placed on a turntable (144) driven in rotation by a motor step by step (5). It is supplied as long as the printer remains connected to the electrical network. Its speed of rotation is optimized to guarantee a good homogeneity of the ink and a low evaporation of the solvent.
  • PTFE polytetrafluoroethylene
  • 144 turntable
  • the advantage of a stepper motor lies in its robustness and long-term performance in maintenance-free operation, as well as in its explosion-proof nature.
  • the turntable (144) consists of a metal plate on which are glued the two permanent magnets as shown in Figure 2. A particular shape shown in this figure has been chosen for the tanks. It is a frustoconical profile (P) which makes it possible to correctly position the bar (3) above the turntable (144).
  • the printer remains disconnected from the electrical network for several days, the sedimentation of the ink in the bottom of the tank is inevitable, and, when the machine is switched on, the speed of rotation of the motors (5) is greatly reduced to avoid the magnetic uncoupling of the rod / turntable assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Ink Jet (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
EP90914741A 1989-10-02 1990-09-28 Circuit d'encre notamment destine a la mise en pression d'une encre a pigments pour imprimante a jet d'encre Expired - Lifetime EP0447521B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR8913060 1989-10-02
FR8913060A FR2652540B1 (fr) 1989-10-02 1989-10-02 Circuit d'encre notamment destine a la mise en pression d'une encre a pigments pour imprimante a jet d'encre.
PCT/FR1990/000696 WO1991004862A1 (fr) 1989-10-02 1990-09-28 Circuit d'encre notamment destine a la mise en pression d'une encre a pigments pour imprimante a jet d'encre

Publications (2)

Publication Number Publication Date
EP0447521A1 EP0447521A1 (fr) 1991-09-25
EP0447521B1 true EP0447521B1 (fr) 1996-05-29

Family

ID=9386139

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90914741A Expired - Lifetime EP0447521B1 (fr) 1989-10-02 1990-09-28 Circuit d'encre notamment destine a la mise en pression d'une encre a pigments pour imprimante a jet d'encre

Country Status (12)

Country Link
US (1) US5451987A (es)
EP (1) EP0447521B1 (es)
JP (1) JPH04501987A (es)
KR (1) KR0183016B1 (es)
AT (1) ATE138608T1 (es)
AU (1) AU635784B2 (es)
CA (1) CA2026656C (es)
DE (1) DE69027200T2 (es)
DK (1) DK0447521T3 (es)
ES (1) ES2089032T3 (es)
FR (1) FR2652540B1 (es)
WO (1) WO1991004862A1 (es)

Families Citing this family (37)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2695704B1 (fr) * 1992-09-15 1994-10-14 Imaje Régulateur de pression pneumatique à commande électronique et procédé de régulation de pression d'un fluide utilisant un tel régulateur.
US5988782A (en) * 1995-04-07 1999-11-23 Canon Kabushiki Kaisha Ink-jet printing apparatus
FR2749217B1 (fr) * 1996-05-30 1998-08-21 Girod Raoul Correcteur pour imprimante
KR100186618B1 (ko) * 1996-09-16 1999-05-15 삼성전자주식회사 피그먼트 잉크의 농도 균일화방법
JP3033698B2 (ja) * 1996-12-13 2000-04-17 新潟日本電気株式会社 インクジェット記録装置
KR100209515B1 (ko) * 1997-02-05 1999-07-15 윤종용 자성잉크를 이용한 잉크젯 프린터의 분사 장치 및 방법
KR100234283B1 (ko) * 1997-08-27 1999-12-15 윤종용 습식현상기의 현상액 공급 시스템
US7768371B2 (en) * 1998-02-05 2010-08-03 City University Of Hong Kong Coreless printed-circuit-board (PCB) transformers and operating techniques therefor
US6398351B1 (en) * 1998-12-14 2002-06-04 Scitex Digital Printing, Inc. Flush system for ink change
IN190975B (es) 1999-01-15 2003-09-06 Ranbaxy Lab Ltd
US6312113B1 (en) * 1999-10-29 2001-11-06 Marconi Data Systems Inc. Ink circulation system
US7090327B1 (en) * 2002-10-03 2006-08-15 Electronics For Imaging, Inc. Water-based ink jet printer
JP3982393B2 (ja) * 2002-11-21 2007-09-26 セイコーエプソン株式会社 液滴吐出装置、電気光学装置、電気光学装置の製造方法および電子機器
JP2006305902A (ja) * 2005-04-28 2006-11-09 Brother Ind Ltd インクジェット記録装置
JP2006326929A (ja) * 2005-05-24 2006-12-07 Fujifilm Holdings Corp 活性エネルギー硬化型インクカートリッジ及びインクジェット記録装置
GB2447919B (en) 2007-03-27 2012-04-04 Linx Printing Tech Ink jet printing
US8308282B2 (en) * 2008-01-28 2012-11-13 Hitachi Industrial Equipment Systems Co., Ltd. Ink jet recording device
JP2009179023A (ja) * 2008-02-01 2009-08-13 Hitachi Industrial Equipment Systems Co Ltd インクジェット記録装置
JP5190297B2 (ja) * 2008-05-15 2013-04-24 理想科学工業株式会社 インクジェットプリンタ
KR101007703B1 (ko) * 2008-06-18 2011-01-13 삼성중공업 주식회사 잉크공급장치
JP5113694B2 (ja) * 2008-09-19 2013-01-09 理想科学工業株式会社 インクカートリッジの管理装置及び管理方法
KR101011707B1 (ko) * 2008-09-29 2011-01-28 삼성전기주식회사 잉크회수장치
DE102008063718B4 (de) 2008-12-19 2010-09-16 Kba-Metronic Aktiengesellschaft Tintentank mit Mahlwerk
JP5394792B2 (ja) * 2009-03-27 2014-01-22 大日本スクリーン製造株式会社 印刷装置
JP5488052B2 (ja) * 2010-03-01 2014-05-14 セイコーエプソン株式会社 液体噴射装置
JP2011183617A (ja) * 2010-03-05 2011-09-22 Ricoh Co Ltd 画像形成装置
US8371684B2 (en) 2011-01-31 2013-02-12 Videojet Technologies Inc. Ink mixing system
US20120262523A1 (en) * 2011-04-14 2012-10-18 Levi Yaakov Ink tank system
FR3026050A1 (fr) 2014-09-18 2016-03-25 Markem Imaje Holding Circuit d'encre pour encres pigmentaires
FR3038864A1 (fr) * 2015-07-13 2017-01-20 Dover Europe Sarl Brassage de l'encre dans une cartouche
WO2017020918A1 (en) * 2015-07-31 2017-02-09 Hewlett-Packard Development Company, L.P. Printer with an air pressurization system and method of building up air pressure in a printing fluid supplier
US9707765B2 (en) * 2015-11-23 2017-07-18 Xerox Corporation Inhibiting sediment formation in a MICR ink tank
FR3048200B1 (fr) 2016-02-26 2019-07-12 Dover Europe Sarl Procede et dispositif d'ajout de solvant par petites quantites
GB2566740B (en) 2017-09-26 2021-07-14 Linx Printing Tech Pigment dispersal in an ink jet printer
JP7124778B2 (ja) 2019-03-25 2022-08-24 ブラザー工業株式会社 液体収容装置及び画像形成装置
JP7031632B2 (ja) 2019-03-25 2022-03-08 ブラザー工業株式会社 画像形成装置
EP4393715A1 (en) * 2022-12-28 2024-07-03 Ricoh Company, Ltd. Liquid supply apparatus and liquid application apparatus

Family Cites Families (8)

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Publication number Priority date Publication date Assignee Title
US3761953A (en) * 1972-10-24 1973-09-25 Mead Corp Ink supply system for a jet ink printer
JPS56136381A (en) * 1980-03-28 1981-10-24 Sharp Corp Control of viscosity of jet ink
FR2553341B1 (fr) * 1983-10-13 1987-06-12 Imaje Sa Circuit d'alimentation en encre d'une tete d'impression a jet d'encre
GB8530885D0 (en) * 1985-12-16 1986-01-29 Domino Printing Sciences Plc Ink jet printing system
US4825228A (en) * 1986-03-17 1989-04-25 Gloeeckler Gerhard Method of, and apparatus for, regulating ink viscosity in an ink jet printing system
FR2619753B2 (fr) * 1986-12-10 1990-08-31 Imaje Sa Circuit d'alimentation fluide d'une tete d'impression equipee d'une cellule multifonctions comportant une chambre a volume variable
EP0282049B1 (de) * 1987-03-13 1992-11-11 Jan Slomianny Tintensystem für Tintenstrahlmatrixdrucker
GB8708884D0 (en) * 1987-04-14 1987-05-20 Domino Printing Sciences Plc Control of ink jet printing system

Also Published As

Publication number Publication date
CA2026656C (fr) 2002-02-12
FR2652540A1 (fr) 1991-04-05
WO1991004862A1 (fr) 1991-04-18
AU635784B2 (en) 1993-04-01
DE69027200D1 (de) 1996-07-04
KR920700924A (ko) 1992-08-10
CA2026656A1 (fr) 1991-04-03
KR0183016B1 (ko) 1999-05-15
US5451987A (en) 1995-09-19
ATE138608T1 (de) 1996-06-15
EP0447521A1 (fr) 1991-09-25
AU6515090A (en) 1991-04-28
DE69027200T2 (de) 1996-12-19
JPH04501987A (ja) 1992-04-09
FR2652540B1 (fr) 1995-06-02
DK0447521T3 (da) 1996-10-07
ES2089032T3 (es) 1996-10-01

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