JPH02113950A - Ink jet head - Google Patents

Ink jet head

Info

Publication number
JPH02113950A
JPH02113950A JP26756188A JP26756188A JPH02113950A JP H02113950 A JPH02113950 A JP H02113950A JP 26756188 A JP26756188 A JP 26756188A JP 26756188 A JP26756188 A JP 26756188A JP H02113950 A JPH02113950 A JP H02113950A
Authority
JP
Japan
Prior art keywords
ink
voltage
heating element
movable part
ink supply
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.)
Pending
Application number
JP26756188A
Other languages
Japanese (ja)
Inventor
Masatoshi Yasuhara
安原　正俊
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.)
NEC Corp
Original Assignee
NEC Corp
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 NEC Corp filed Critical NEC Corp
Priority to JP26756188A priority Critical patent/JPH02113950A/en
Publication of JPH02113950A publication Critical patent/JPH02113950A/en
Pending legal-status Critical Current

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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2/14016—Structure of bubble jet print heads
    • B41J2/14032—Structure of the pressure chamber
    • B41J2/14048—Movable member in the chamber
    • 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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14387—Front shooter
    • 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
    • B41J2/135—Nozzles
    • B41J2/14—Structure thereof only for on-demand ink jet heads
    • B41J2002/14411—Groove in the nozzle plate

Landscapes

  • Ink Jet (AREA)

Abstract

PURPOSE:To prevent the back flow of ink toward an ink supply passage by providing nozzles opened to the outside to a plurality of the ink chambers formed to a head main body and further providing heating elements for pressurizing ink to the ink chambers while providing check valves to the ink supply ports of the ink chambers. CONSTITUTION:A movable part 5 is closed in such a state that voltage is applied to a heating element 6 and the ink supply port 8a of an ink chamber 8 is closed. Since the ink in the ink chamber 8 is reduced after an ink droplet is allowed to fly by applying voltage to the heating element 6, the movable part 5 is opened by negative pressure to replenish the ink to the ink chamber 8 from an ink supply passage in the amount corresponding to the reduction of the ink droplet as shown by an arrow. Since the movable part 5 acts as a check valve, no ink flows back to the ink supply passage 7 even when voltage is applied to the heating element 6. Therefore, when the application of voltage to the heating element can be stopped, the replenishing time of the ink to a nozzle can be shortened and the generation frequency of the ink droplet can be enhanced.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明はインクジェットヘッドに関し、特にドロップオ
ンデマンド型のサーマルインクジェットヘッドに関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inkjet head, and particularly to a drop-on-demand type thermal inkjet head.

〔従来の技術〕[Conventional technology]

従来、この種のドロップオンデマンド型のサーマルイン
クジェットヘッドでは各ノズルに対し弁をもたせていな
かった。Conventionally, this type of drop-on-demand type thermal inkjet head did not have a valve for each nozzle.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述した従来のインクジェットヘッドでは、ノズルから
インクを飛翔させる際に、インク供給路側へのインクの
逆流を防止することができず、イング滴噴出の周波数応
答性が悪いという欠点がある。The above-described conventional inkjet head has the disadvantage that when ink is ejected from the nozzle, it is not possible to prevent the ink from flowing back toward the ink supply path, and the frequency response of the ejecting droplets is poor.

本発明の目的は前記課題を解決したインクジェットヘッ
ドを提供することにある。An object of the present invention is to provide an inkjet head that solves the above problems.

（課題を解決するための手段） 前記［］的を達成するため、本発明に係るインクジェッ
トヘッドにおいては、ヘッド本体に形成された複数のイ
ンク室に外部に開放したノズルを設けるとともに、該イ
ンク室にインクを加圧する熱素子を設け、該インク室の
インク供給口に逆止弁を備えたものである。(Means for Solving the Problems) In order to achieve the above object, in the inkjet head according to the present invention, a plurality of ink chambers formed in the head body are provided with nozzles open to the outside, and the ink chambers are provided with nozzles that open to the outside. A heating element for pressurizing ink is provided in the ink chamber, and a check valve is provided in the ink supply port of the ink chamber.

〔実施例〕〔Example〕

以下、本発明の一実施例を図により説明する。 Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

第１図、第２図は本発明の一実施例を示す縦断面図、第
３図は同横断面図である。FIGS. 1 and 2 are longitudinal cross-sectional views showing one embodiment of the present invention, and FIG. 3 is a cross-sectional view of the same.

図において、ノズルプレート１とスペーサ２とベースプ
レート３とを積層し、これらにより複数のインク室８，
８・・・を形成し、各インク室８に対応して外部に開放
したノズル４をノズルプレート１に設けるとともに、イ
ンク室８内のベースプレート３上に、インクを加圧する
熱素子６を設置する。In the figure, a nozzle plate 1, a spacer 2, and a base plate 3 are stacked, and a plurality of ink chambers 8,
8..., and a nozzle 4 opened to the outside corresponding to each ink chamber 8 is provided on the nozzle plate 1, and a thermal element 6 for pressurizing the ink is installed on the base plate 3 in the ink chamber 8. .

一方、スペーサ２、ベースプレート３に渡ってインク供
給路７を設け、該インク供給路７に連なるインク室８の
インク供給口８ａに逆止片としての可動部５を配置し、
該可ｌｊＪ部５をノズルプレート１に片持式に一体に形
成する。On the other hand, an ink supply path 7 is provided across the spacer 2 and the base plate 3, and a movable part 5 as a check piece is arranged at the ink supply port 8a of the ink chamber 8 connected to the ink supply path 7.
The flexible ljJ portion 5 is integrally formed on the nozzle plate 1 in a cantilevered manner.

実施例において、熱素子６に電圧を印加している状態で
は可動部５は第１図のように閉じており、インク室８の
インク供給口８ａが閉塞されており。In the embodiment, when a voltage is applied to the thermal element 6, the movable part 5 is closed as shown in FIG. 1, and the ink supply port 8a of the ink chamber 8 is closed.

一方熱素子６に電圧を印加してインク滴を飛翔させた後
にはインク室８内のインクが減少するため、負圧により
可動部５が第２図のように開き、インク滴減少分をイン
ク供給路７から矢印のようにインク室８内に補給する。On the other hand, after applying a voltage to the thermal element 6 and causing the ink droplets to fly, the amount of ink in the ink chamber 8 decreases, so the movable part 5 opens as shown in FIG. The ink chamber 8 is replenished from the supply path 7 as shown by the arrow.

５ｆ動部５が逆止弁の働きをするため、熱索子６に電圧
を印加してもインク供給路７方向へインクが逆流しない
ため、熱索子６に電圧を印加するのを止めたとき、ノズ
ルへインクを補給する時ｒｉｆｆが短縮でき、インク滴
発生の周波数を高くすることができる。Since the 5f moving part 5 functions as a check valve, the ink does not flow back toward the ink supply path 7 even if voltage is applied to the thermal cord 6, so the application of voltage to the thermal cord 6 is stopped. In this case, when replenishing ink to the nozzle, the riff can be shortened and the frequency of ink droplet generation can be increased.

〔発明の効果〕〔Effect of the invention〕

以上説明したように本発明はインク滴吐出の周波数を高
くすることができ、また弁機能による逆流防止効果のた
めに熱素子に電圧を加えることにより発生する圧力を効
率よくインク滴吐出に使えるため、熱素子に加える電力
を少なくすることができ、省エネルギー化を実現できる
効果を有する。As explained above, the present invention can increase the frequency of ink droplet ejection, and the pressure generated by applying voltage to the thermal element to prevent backflow due to the valve function can be used efficiently for ink droplet ejection. , it is possible to reduce the electric power applied to the thermal element, which has the effect of realizing energy saving.

【図面の簡単な説明】[Brief explanation of drawings]

第１図、第２図は本発明の一実施例を示す縦断面図、第
３図は第２図のＡ−Ａ線断面図である。 １・・・ノズルプレート　　　２・・・スペーサ３・・
・ベースプレート　　　４・・・ノズル５・・可動部　
　　　　　　６・・・熱素子７・・インク供給路1 and 2 are longitudinal sectional views showing one embodiment of the present invention, and FIG. 3 is a sectional view taken along the line A--A in FIG. 2. 1... Nozzle plate 2... Spacer 3...
・Base plate 4... Nozzle 5... Movable part
6...Heating element 7...Ink supply path

Claims (1)

【特許請求の範囲】[Claims] （１）ヘッド本体に形成された複数のインク室に外部に
開放したノズルを設けるとともに、該インク室にインク
を加圧する熱素子を設け、該インク室のインク供給口に
逆止弁を備えたことを特徴とするインクジェットヘッド
。(1) A plurality of ink chambers formed in the head body are provided with nozzles open to the outside, a thermal element is provided in the ink chambers to pressurize the ink, and a check valve is provided in the ink supply port of the ink chamber. An inkjet head characterized by:
JP26756188A 1988-10-24 1988-10-24 Ink jet head Pending JPH02113950A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26756188A JPH02113950A (en) 1988-10-24 1988-10-24 Ink jet head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26756188A JPH02113950A (en) 1988-10-24 1988-10-24 Ink jet head

Publications (1)

Publication Number Publication Date
JPH02113950A true JPH02113950A (en) 1990-04-26

Family

ID=17446513

Family Applications (1)

Application Number Title Priority Date Filing Date
JP26756188A Pending JPH02113950A (en) 1988-10-24 1988-10-24 Ink jet head

Country Status (1)

Country Link
JP (1) JPH02113950A (en)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0737582A2 (en) * 1995-04-14 1996-10-16 Canon Kabushiki Kaisha Method for producing liquid ejecting head and liquid ejecting head obtained by the same method
EP0737580A2 (en) * 1995-04-14 1996-10-16 Canon Kabushiki Kaisha Liquid ejecting head, liquid ejecting device and liquid ejecting method
EP0760286A1 (en) * 1995-08-25 1997-03-05 Hewlett-Packard Company Method and apparatus for controlling inkjet nozzle loading
JPH0970972A (en) * 1995-01-13 1997-03-18 Canon Inc Liquid emitting head, apparatus and method
EP0816087A2 (en) * 1996-07-05 1998-01-07 Canon Kabushiki Kaisha Discharging method, liquid discharging head and head cartridge and recording apparatus using the same
US6102529A (en) * 1995-04-26 2000-08-15 Canon Kabushiki Kaisha Liquid ejecting method with movable member
US6109735A (en) * 1996-06-07 2000-08-29 Canon Kabushiki Kaisha Liquid discharging method, liquid supplying method, liquid discharge head, liquid discharge head cartridge using such liquid discharge head, and liquid discharge apparatus
US6151049A (en) * 1996-07-12 2000-11-21 Canon Kabushiki Kaisha Liquid discharge head, recovery method and manufacturing method for liquid discharge head, and liquid discharge apparatus using liquid discharge head
US6183068B1 (en) 1996-07-12 2001-02-06 Canon Kabushiki Kaisha Liquid discharging head, head cartridge, liquid discharging device, recording system, head kit, and fabrication process of liquid discharging head
US6213592B1 (en) 1996-06-07 2001-04-10 Canon Kabushiki Kaisha Method for discharging ink from a liquid jet recording head having a fluid resistance element with a movable member, and head, head cartridge and recording apparatus using that method
US6270199B1 (en) 1995-04-14 2001-08-07 Canon Kabushiki Kaisha Liquid ejecting head, liquid ejecting device and liquid ejecting method
EP1125744A1 (en) * 2000-02-15 2001-08-22 Canon Kabushiki Kaisha Liquid discharge head, liquid discharge method, liquid discharge apparatus and recovery method for liquid discharge head
EP1125743A1 (en) * 2000-02-15 2001-08-22 Canon Kabushiki Kaisha Liquid discharging head, liquid discharging apparatus, and method of producing the same head
US6447093B1 (en) 1996-07-12 2002-09-10 Canon Kabushiki Kaisha Liquid discharge head having a plurality of liquid flow channels with check valves
JP2002254647A (en) * 2001-03-02 2002-09-11 Canon Inc Liquid jet head, liquid jet method, and manufacturing method for liquid jet head
US6457816B1 (en) 1996-07-12 2002-10-01 Canon Kabushiki Kaisha Liquid discharging method and a liquid jet head, and a head cartridge using such jet head, and a liquid jet apparatus
US6554383B2 (en) 1996-07-12 2003-04-29 Canon Kabushiki Kaisha Liquid ejecting head and head cartridge capable of adjusting energy supplied thereto, liquid ejecting device provided with the head and head cartridge, and recording system
JP2003266701A (en) * 1995-01-13 2003-09-24 Canon Inc Liquid ejecting head
KR100435020B1 (en) * 2001-08-10 2004-06-11 캐논 가부시끼가이샤 Ink Jet Recording Head and Method for Manufacturing the Same
US6773092B1 (en) 1996-07-05 2004-08-10 Aya Yoshihira Liquid discharging head and liquid discharging device
US6860581B2 (en) * 2001-03-27 2005-03-01 Silverbrook Research Pty Ltd Printhead module with a fluid supply and valve to close the fluid supply
US7325908B2 (en) 2002-02-07 2008-02-05 Ricoh Company, Ltd. Pressure adjustment mechanism, liquid tank, liquid providing device, ink cartridge, and inkjet printing apparatus

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0970972A (en) * 1995-01-13 1997-03-18 Canon Inc Liquid emitting head, apparatus and method
JP2003266701A (en) * 1995-01-13 2003-09-24 Canon Inc Liquid ejecting head
US6074543A (en) * 1995-04-14 2000-06-13 Canon Kabushiki Kaisha Method for producing liquid ejecting head
EP0737582A3 (en) * 1995-04-14 1997-07-09 Canon Kk Method for producing liquid ejecting head and liquid ejecting head obtained by the same method
EP0737580A3 (en) * 1995-04-14 1997-07-09 Canon Kk Liquid ejecting head, liquid ejecting device and liquid ejecting method
US6378205B1 (en) 1995-04-14 2002-04-30 Canon Kabushiki Kaisha Method for producing liquid ejecting head and liquid ejecting head obtained by the same method
US6331050B1 (en) 1995-04-14 2001-12-18 Canon Kabushiki Kaisha Liquid ejecting head and method in which a movable member is provided between flow paths, one path joining a common chamber and ejection orifice, the other, having a heat generating element
EP0737582A2 (en) * 1995-04-14 1996-10-16 Canon Kabushiki Kaisha Method for producing liquid ejecting head and liquid ejecting head obtained by the same method
US6270199B1 (en) 1995-04-14 2001-08-07 Canon Kabushiki Kaisha Liquid ejecting head, liquid ejecting device and liquid ejecting method
EP0737580A2 (en) * 1995-04-14 1996-10-16 Canon Kabushiki Kaisha Liquid ejecting head, liquid ejecting device and liquid ejecting method
US6102529A (en) * 1995-04-26 2000-08-15 Canon Kabushiki Kaisha Liquid ejecting method with movable member
EP0760286A1 (en) * 1995-08-25 1997-03-05 Hewlett-Packard Company Method and apparatus for controlling inkjet nozzle loading
US6213592B1 (en) 1996-06-07 2001-04-10 Canon Kabushiki Kaisha Method for discharging ink from a liquid jet recording head having a fluid resistance element with a movable member, and head, head cartridge and recording apparatus using that method
US6109735A (en) * 1996-06-07 2000-08-29 Canon Kabushiki Kaisha Liquid discharging method, liquid supplying method, liquid discharge head, liquid discharge head cartridge using such liquid discharge head, and liquid discharge apparatus
EP0816087A2 (en) * 1996-07-05 1998-01-07 Canon Kabushiki Kaisha Discharging method, liquid discharging head and head cartridge and recording apparatus using the same
US6164763A (en) * 1996-07-05 2000-12-26 Canon Kabushiki Kaisha Liquid discharging head with a movable member opposing a heater surface
US6773092B1 (en) 1996-07-05 2004-08-10 Aya Yoshihira Liquid discharging head and liquid discharging device
EP0816087A3 (en) * 1996-07-05 1999-02-03 Canon Kabushiki Kaisha Discharging method, liquid discharging head and head cartridge and recording apparatus using the same
US6554383B2 (en) 1996-07-12 2003-04-29 Canon Kabushiki Kaisha Liquid ejecting head and head cartridge capable of adjusting energy supplied thereto, liquid ejecting device provided with the head and head cartridge, and recording system
US6183068B1 (en) 1996-07-12 2001-02-06 Canon Kabushiki Kaisha Liquid discharging head, head cartridge, liquid discharging device, recording system, head kit, and fabrication process of liquid discharging head
US6447093B1 (en) 1996-07-12 2002-09-10 Canon Kabushiki Kaisha Liquid discharge head having a plurality of liquid flow channels with check valves
US6151049A (en) * 1996-07-12 2000-11-21 Canon Kabushiki Kaisha Liquid discharge head, recovery method and manufacturing method for liquid discharge head, and liquid discharge apparatus using liquid discharge head
US6457816B1 (en) 1996-07-12 2002-10-01 Canon Kabushiki Kaisha Liquid discharging method and a liquid jet head, and a head cartridge using such jet head, and a liquid jet apparatus
EP1125743A1 (en) * 2000-02-15 2001-08-22 Canon Kabushiki Kaisha Liquid discharging head, liquid discharging apparatus, and method of producing the same head
EP1125744A1 (en) * 2000-02-15 2001-08-22 Canon Kabushiki Kaisha Liquid discharge head, liquid discharge method, liquid discharge apparatus and recovery method for liquid discharge head
US6530651B2 (en) * 2001-03-02 2003-03-11 Canon Kabushiki Kaisha Liquid ejecting head, liquid ejecting method, and method for manufacturing liquid ejecting head
JP2002254647A (en) * 2001-03-02 2002-09-11 Canon Inc Liquid jet head, liquid jet method, and manufacturing method for liquid jet head
JP4708586B2 (en) * 2001-03-02 2011-06-22 キヤノン株式会社 Liquid discharge head, liquid discharge method, and method of manufacturing liquid discharge head
US6860581B2 (en) * 2001-03-27 2005-03-01 Silverbrook Research Pty Ltd Printhead module with a fluid supply and valve to close the fluid supply
US7114794B2 (en) 2001-03-27 2006-10-03 Silverbrook Research Pty Ltd Printhead assembly that incorporates a capping device
US7128392B2 (en) 2001-03-27 2006-10-31 Silverbrook Research Pty Ltd Printhead assembly that incorporates a printhead module retention channel
US7591529B2 (en) 2001-03-27 2009-09-22 Silverbrook Research Pty Ltd Printhead assembly that incorporates a printhead module retention channel
US7914131B2 (en) 2001-03-27 2011-03-29 Silverbrook Research Pty Ltd Inkjet printhead assembly having releasably attached printhead modules
KR100435020B1 (en) * 2001-08-10 2004-06-11 캐논 가부시끼가이샤 Ink Jet Recording Head and Method for Manufacturing the Same
US7325908B2 (en) 2002-02-07 2008-02-05 Ricoh Company, Ltd. Pressure adjustment mechanism, liquid tank, liquid providing device, ink cartridge, and inkjet printing apparatus

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