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ATE299438T1 - Druckverfahren und druckvorrichtung zur tonabstufung - Google Patents

Druckverfahren und druckvorrichtung zur tonabstufung

Info

Publication number
ATE299438T1
ATE299438T1 AT02078670T AT02078670T ATE299438T1 AT E299438 T1 ATE299438 T1 AT E299438T1 AT 02078670 T AT02078670 T AT 02078670T AT 02078670 T AT02078670 T AT 02078670T AT E299438 T1 ATE299438 T1 AT E299438T1
Authority
AT
Austria
Prior art keywords
liquid
flow path
providing
tone
liquid flow
Prior art date
Application number
AT02078670T
Other languages
English (en)
Inventor
Yoshie Nakata
Toshio Kashino
Takeshi Okazaki
Aya Yoshihira
Kiyomitsu Kudo
Original Assignee
Canon Kk
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 Canon Kk filed Critical Canon Kk
Application granted granted Critical
Publication of ATE299438T1 publication Critical patent/ATE299438T1/de

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1621Manufacturing processes
    • B41J2/1632Manufacturing processes machining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/14Structure thereof only for on-demand ink jet heads
    • B41J2/14016Structure of bubble jet print heads
    • B41J2/14024Assembling head parts
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/14Structure thereof only for on-demand ink jet heads
    • B41J2/14016Structure of bubble jet print heads
    • B41J2/14032Structure of the pressure chamber
    • B41J2/14048Movable member in the chamber
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1601Production of bubble jet print heads
    • B41J2/1604Production of bubble jet print heads of the edge shooter type
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1621Manufacturing processes
    • B41J2/1623Manufacturing processes bonding and adhesion
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1621Manufacturing processes
    • B41J2/1626Manufacturing processes etching
    • B41J2/1629Manufacturing processes etching wet etching
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1621Manufacturing processes
    • B41J2/1631Manufacturing processes photolithography
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1621Manufacturing processes
    • B41J2/1632Manufacturing processes machining
    • B41J2/1634Manufacturing processes machining laser machining
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1621Manufacturing processes
    • B41J2/1635Manufacturing processes dividing the wafer into individual chips
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1621Manufacturing processes
    • B41J2/164Manufacturing processes thin film formation
    • B41J2/1643Manufacturing processes thin film formation thin film formation by plating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/135Nozzles
    • B41J2/16Production of nozzles
    • B41J2/1621Manufacturing processes
    • B41J2/164Manufacturing processes thin film formation
    • B41J2/1645Manufacturing processes thin film formation thin film formation by spincoating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters 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
    • B41J2/01Ink jet
    • B41J2/21Ink jet for multi-colour printing
    • B41J2/2107Ink jet for multi-colour printing characterised by the ink properties
    • B41J2/211Mixing of inks, solvent or air prior to paper contact
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2202/00Embodiments of or processes related to ink-jet or thermal heads
    • B41J2202/01Embodiments of or processes related to ink-jet heads
    • B41J2202/21Line printing

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Ink Jet (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)
  • Printing Methods (AREA)
  • Degasification And Air Bubble Elimination (AREA)
AT02078670T 1995-04-26 1996-04-26 Druckverfahren und druckvorrichtung zur tonabstufung ATE299438T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12731895 1995-04-26

Publications (1)

Publication Number Publication Date
ATE299438T1 true ATE299438T1 (de) 2005-07-15

Family

ID=14956975

Family Applications (2)

Application Number Title Priority Date Filing Date
AT96302936T ATE233661T1 (de) 1995-04-26 1996-04-26 Flüssigkeitsausstosskopf, flüssigkeitsausstossvorrichtung und flüssigkeitsausstossverfahren
AT02078670T ATE299438T1 (de) 1995-04-26 1996-04-26 Druckverfahren und druckvorrichtung zur tonabstufung

Family Applications Before (1)

Application Number Title Priority Date Filing Date
AT96302936T ATE233661T1 (de) 1995-04-26 1996-04-26 Flüssigkeitsausstosskopf, flüssigkeitsausstossvorrichtung und flüssigkeitsausstossverfahren

Country Status (11)

Country Link
US (1) US6084616A (de)
EP (2) EP0739737B1 (de)
KR (1) KR100190413B1 (de)
CN (1) CN1081542C (de)
AT (2) ATE233661T1 (de)
AU (1) AU720345B2 (de)
CA (1) CA2175165C (de)
DE (2) DE69634935T2 (de)
MX (1) MX9601559A (de)
SG (1) SG79193A1 (de)
TW (1) TW334399B (de)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5821962A (en) * 1995-06-02 1998-10-13 Canon Kabushiki Kaisha Liquid ejection apparatus and method
AU726482B2 (en) * 1995-06-02 2000-11-09 Canon Kabushiki Kaisha Liquid ejection apparatus and method
CA2207265C (en) * 1996-06-07 2002-03-12 Canon Kabushiki Kaisha Liquid ejection head and apparatus, and manufacturing method for the liquid ejection head
JP3403010B2 (ja) * 1996-07-12 2003-05-06 キヤノン株式会社 液体吐出ヘッド
JP3652016B2 (ja) 1996-07-12 2005-05-25 キヤノン株式会社 液体吐出ヘッドおよび液体吐出方法
AUPP653998A0 (en) * 1998-10-16 1998-11-05 Silverbrook Research Pty Ltd Micromechanical device and method (ij46B)
US6902255B1 (en) 1998-10-16 2005-06-07 Silverbrook Research Pty Ltd Inkjet printers
US7216956B2 (en) * 1998-10-16 2007-05-15 Silverbrook Research Pty Ltd Printhead assembly with power and ground connections along single edge
ATE333370T1 (de) * 1998-12-03 2006-08-15 Canon Kk Flüssigkeitsausstossverfahren, flüssigkeitsausstosskopf, verfahren zur herstellung eines flüssigkeitsausstosskopfes, kopfkassette und flüssigkeitsausstossgerät
AUPP823199A0 (en) * 1999-01-15 1999-02-11 Silverbrook Research Pty Ltd Micromechanical device and method (IJ46L)
JP2001058409A (ja) * 1999-08-23 2001-03-06 Canon Inc インクジェット記録ヘッド、インクジェット記録ヘッドカーリッジ、およびインクジェット記録装置
US6834423B2 (en) * 2000-07-31 2004-12-28 Canon Kabushiki Kaisha Method of manufacturing a liquid discharge head
DE60110875T2 (de) * 2000-10-04 2006-05-04 Canon K.K. Kopfreinigungsvorrichtung, Kopfreinigungsverfahren und Tintenstrahlaufzeichnungsgerät
JP2002166553A (ja) * 2000-11-30 2002-06-11 Canon Inc 液体吐出ヘッドおよび液体吐出ヘッドの製造方法
US6527378B2 (en) * 2001-04-20 2003-03-04 Hewlett-Packard Company Thermal ink jet defect tolerant resistor design
US6682186B2 (en) * 2001-06-08 2004-01-27 Hewlett-Packard Development Company, Lp. Graded capillarity structures for passive gas management, and methods
GB2379414A (en) * 2001-09-10 2003-03-12 Seiko Epson Corp Method of forming a large flexible electronic display on a substrate using an inkjet head(s) disposed about a vacuum roller holding the substrate
US6428140B1 (en) * 2001-09-28 2002-08-06 Hewlett-Packard Company Restriction within fluid cavity of fluid drop ejector
US7954930B2 (en) * 2006-11-30 2011-06-07 Fuji Xerox Co., Ltd. Liquid droplet ejecting head and liquid droplet ejecting apparatus
CN105284362A (zh) * 2015-11-01 2016-02-03 十堰智脑中药材专业合作社 一种金银花套种辣椒、复种秋油菜的栽培方法
PT3664630T (pt) 2018-10-15 2022-03-16 Juul Labs Inc Elemento de aquecimento
US12256784B2 (en) 2018-10-17 2025-03-25 Juul Labs, Inc. Cartridge for a vaporizer device
EP4044842A2 (de) * 2019-10-14 2022-08-24 Juul Labs, Inc. Mikrofluidische systeme einer verdampfervorrichtung und vorrichtungen
CN114889333B (zh) * 2022-04-27 2023-02-10 华中科技大学 一种消除喷印过程中气泡缺陷的调控方法和装置

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1558765A (en) * 1976-02-05 1980-01-09 Nat Res Dev Printing apparatus
CA1127227A (en) * 1977-10-03 1982-07-06 Ichiro Endo Liquid jet recording process and apparatus therefor
JPS5581172A (en) * 1978-12-14 1980-06-18 Canon Inc Liquid injection type recording method and device
US4480259A (en) * 1982-07-30 1984-10-30 Hewlett-Packard Company Ink jet printer with bubble driven flexible membrane
US4494128A (en) * 1982-09-17 1985-01-15 Hewlett-Packard Company Gray scale printing with ink jets
JPS6169467A (ja) * 1985-06-11 1986-04-10 Seiko Epson Corp 記録液滴吐出型記録装置
JPS63199972A (ja) * 1987-02-13 1988-08-18 Canon Inc 弁素子の製造方法
EP0436047A1 (de) * 1990-01-02 1991-07-10 Siemens Aktiengesellschaft Flüssigkeitsstrahlaufzeichnungskopf für Tintendruckeinrichtungen
JP3161635B2 (ja) * 1991-10-17 2001-04-25 ソニー株式会社 インクジェットプリントヘッド及びインクジェットプリンタ
JPH05124189A (ja) * 1991-11-01 1993-05-21 Matsushita Electric Ind Co Ltd インク吐出装置
JP3095842B2 (ja) * 1991-12-26 2000-10-10 株式会社リコー インクジェット記録装置
US5278585A (en) * 1992-05-28 1994-01-11 Xerox Corporation Ink jet printhead with ink flow directing valves
JPH0671881A (ja) * 1992-08-07 1994-03-15 Sony Corp インクジェットプリントヘッド及びインクジェットプリンタ
JP3158374B2 (ja) * 1992-08-12 2001-04-23 ソニー株式会社 インクジェットプリントヘッド及びインクジェットプリンタ
JPH06246935A (ja) * 1993-03-01 1994-09-06 Seiko Epson Corp インクジェット記録装置
US6036295A (en) * 1993-11-26 2000-03-14 Sony Corporation Ink jet printer head and method for manufacturing the same
US5581287A (en) * 1994-06-30 1996-12-03 Jetfill, Inc. Inkjet printer ink cartridge refilling structure
US5821962A (en) * 1995-06-02 1998-10-13 Canon Kabushiki Kaisha Liquid ejection apparatus and method

Also Published As

Publication number Publication date
EP0739737B1 (de) 2003-03-05
EP0739737A3 (de) 1997-07-09
US6084616A (en) 2000-07-04
DE69626436D1 (de) 2003-04-10
DE69634935D1 (de) 2005-08-18
MX9601559A (es) 1997-06-28
ATE233661T1 (de) 2003-03-15
CA2175165A1 (en) 1996-10-27
CN1150930A (zh) 1997-06-04
KR960037286A (ko) 1996-11-19
EP1275506A1 (de) 2003-01-15
EP1275506B1 (de) 2005-07-13
TW334399B (en) 1998-06-21
DE69634935T2 (de) 2006-05-18
EP0739737A2 (de) 1996-10-30
CA2175165C (en) 2000-10-17
SG79193A1 (en) 2001-03-20
CN1081542C (zh) 2002-03-27
DE69626436T2 (de) 2003-10-23
KR100190413B1 (ko) 1999-06-01
AU720345B2 (en) 2000-05-25
AU5089696A (en) 1996-11-07

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