EP0448578A1 - Heizvorrichtung zur erwärmung der tinte im schreibkopf einer tintendruckeinrichtung. - Google Patents
Heizvorrichtung zur erwärmung der tinte im schreibkopf einer tintendruckeinrichtung.Info
- Publication number
- EP0448578A1 EP0448578A1 EP90900098A EP90900098A EP0448578A1 EP 0448578 A1 EP0448578 A1 EP 0448578A1 EP 90900098 A EP90900098 A EP 90900098A EP 90900098 A EP90900098 A EP 90900098A EP 0448578 A1 EP0448578 A1 EP 0448578A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ink
- heating
- layer
- coating
- heating device
- 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.)
- Granted
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
- B41J2/14072—Electrical connections, e.g. details on electrodes, connecting the chip to the outside...
-
- 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
- B41J2/14153—Structures including a sensor
-
- 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
- B41J2002/14379—Edge shooter
Definitions
- Heating device for heating the ink in the print head of an ink printing device
- the invention relates to a heating device for heating the ink in the print head of an ink printing device according to the preamble of patent claim 1.
- a known principle for the representation of characters on a recording medium is based on the fact that under the action of a control individual ink droplets are ejected from nozzles of a writing head which is part of an ink printing device. By coordinating the ejection of individual droplets and the relative movement between the recording medium and the writing head, characters and / or graphic patterns are thereby built up in a grid-like manner on the recording medium.
- the operational safety and the quality of the recording depend to a large extent on the uniformity of the droplet ejection, i.e. the individual droplets ejected by a control pulse must have a defined size and leave the nozzle of the writing head at the same speed in each case.
- the write head is usually arranged on a cooling surface, for example on an aluminum plate. If the ink has to be heated up after long pauses in writing or when the ink printing device is switched on, then the cooling surface must also be heated up as well. This results in relatively long heating times. In addition, the associated constructional and manufacturing expenditure is not insignificant, since additional individual elements must be kept ready, assembled and electrically connected. It is although already known (DE-OS 29 43 164), inside the
- the object of the invention is to provide a device for heating or heating the ink for a write head in ink printing devices according to the preamble, with which the heating time is reduced, with which a reliable control with low control deviation is guaranteed, which continues requires only little space for heating and, if necessary, sensor elements and can be produced and assembled with little effort.
- the heating and sensor component is integrated in the write head structure.
- the integration in the thin-layer structure allows the production of the complete print head in a single technology. This eliminates the need to provide and assemble your own heating and sensor elements and thus also additional soldering processes for the connecting lines of the individual components. Since heating and, if necessary, sensor elements are arranged in the immediate vicinity of the ink, and the heating does not primarily heat the entire carrier, but rather directly heats the ink, this results in short heating times. Further associated advantages consist in the fact that the cooling surface of the print head can be increased if necessary without having to increase the heating power for heating the ink.
- the invention is explained below with reference to exemplary embodiments, for which reference is made to the drawings. Show there
- FIGS. 1 and 2 show a first embodiment in which a heating resistor and a sensor element are provided; and FIGS. 3 and 4 show a second embodiment in which the heating resistor also serves as a sensor element.
- Figure 1 shows in section a part of a writing head in which the energy for ejecting the ink droplets is generated by thermal energy. It is well known that print heads of this type are constructed using the so-called thin-film technology.
- a resistance layer 3 acting as an electrothermal transducer element and the contacts 4 and 5 for this resistance layer 3 are applied to a substrate 1 as a carrier between a first covering layer 2 and a second covering layer 6.
- the substrate 1 preferably consists of silicon, the cover layers 2 and 6 made of silicon oxide (Si0 2 ), the transducer element 3 made of hafnium boride (HfB 2 ) and the contacts 4 and 5 made of aluminum (Al).
- the structure is completed by a cover plate 7 such that a row of ink channels 8 and a common ink space 9 are formed between the top cover layer 6 and the cover plate 7.
- One ink channel 8 is assigned to an outlet opening 10 of the write head.
- the ink chamber 9 common to all ink channels 8 is connected to an ink supply, not shown here. In each case one transducer element 3 is assigned to one ink channel 8.
- the connection is the Contacting 5 for each individual transducer element 3 individually, the connection for contacting 4 for several or all transducer elements is provided together.
- direct heating of the transducer element 3 is connected, which leads to the formation of an ink vapor bubble in the ink channel 8.
- a defined volume of ink is displaced into the ink space 9, that is to say also in the direction of the outlet opening 10, and is expelled there in the form of a single droplet.
- a heating element and a sensor element in the form of a further thin-layer layer as the uppermost layer on the substrate 1 and thus in the closest possible proximity to the ink in the ink space 9 are provided for heating the ink to a value at which the viscosity is optimal for the ejection process ⁇ brings.
- This further thin-film layer is structured in such a way that it forms a heating layer 11 and a sensor layer 12.
- an overlying, electrically insulating protective layer 13 This also ensures that electrically conductive ink liquids can also be used.
- the protective layer 13 can be made of polyimide, for example.
- the heating layer 11 is arranged as large as possible, advantageously over the entire area of the ink space 9. With advantage the heating layer is structured in a meandering pattern. This achieves a sufficiently large electrical resistance which is matched to the voltage supply. For example, for a heating power of 5 W at a terminal voltage of 30 V, the resistance value can be 180 ohms.
- FIG. 2 An example of the change-like arrangement of the heating layer 11 and of the arrangement of the sensor layer 12 is shown in FIG. 2. It can be seen that the heating layer 11 extends uniformly over the entire area of the ink chamber 9. This ensures a very fast heat transfer to the ink. In this example, the sensor layer 12 detects the ink temperature both in the ink chamber 9 and in the region of the ink channels 8.
- an active sensor area only in the area of the ink channels 8. While in the case of the exemplary embodiment shown in FIGS. 1 and 2, an average temperature is taken, only the temperature of the ink in the region of the ink channels 8 is detected with this configuration. In this case, it is advantageous to use a material for the contacting of the sensor layer 12, the resistance value of which is independent of the temperature.
- a material with a large temperature dependence of its resistance value is used as the material for the heating layer.
- nickel can be used for this.
- FIG. 3 The layer structure of a write head, in which the heating and sensor layers are realized by a single thin layer, is shown in FIG. 3.
- the arrangement of the heating and sensor layers in the form of a meandering structure is shown in FIG Layer structure consists of the substrate 1 on which the cover layer 2, the electrothermal transducer element 3, the contacts 4 and 5 and the second cover layer 6 are arranged.
- the heating and sensor layer 14 is applied as a further thin layer on the cover layer 6 and is covered by a protective layer 13.
- the heating and sensor layer 14 extends over the entire ink space 9 into the individual ink channels 8.
- FIG. 4 shows, for example, it is structured in a meandering shape.
- the advantage of this embodiment is that, because of the great temperature dependence of the electrical resistance of a heating layer made of nickel, the same layer can be used as a temperature sensor in the heating breaks. With such a construction concept, not only is an additional sensor component unnecessary, but the electrical supply lines for an additional sensor element are also eliminated.
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP88120856 | 1988-12-14 | ||
EP88120856 | 1988-12-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0448578A1 true EP0448578A1 (de) | 1991-10-02 |
EP0448578B1 EP0448578B1 (de) | 1993-10-06 |
Family
ID=8199662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90900098A Expired - Lifetime EP0448578B1 (de) | 1988-12-14 | 1989-11-30 | Heizvorrichtung zur erwärmung der tinte im schreibkopf einer tintendruckeinrichtung |
Country Status (5)
Country | Link |
---|---|
US (1) | US5191360A (de) |
EP (1) | EP0448578B1 (de) |
JP (1) | JPH04506481A (de) |
DE (1) | DE58905857D1 (de) |
WO (1) | WO1990006851A1 (de) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6189989B1 (en) * | 1993-04-12 | 2001-02-20 | Canon Kabushiki Kaisha | Embroidering using ink jet printing apparatus |
EP0661157B1 (de) * | 1993-12-28 | 2001-05-09 | Canon Kabushiki Kaisha | Tintenstrahlaufzeichnungskopf, damit versehene Tintenstrahlaufzeichnungsvorrichtung und Herstellungsverfahren für den Tintenstrahlaufzeichnungskopf. |
US5901425A (en) | 1996-08-27 | 1999-05-11 | Topaz Technologies Inc. | Inkjet print head apparatus |
EP1057634B1 (de) * | 1999-06-04 | 2004-12-08 | Canon Kabushiki Kaisha | Flüssigkeitsausstosskopf, Flüsigkeitsausstossvorrichtung und Verfahren zur Herstellung eines Flüssigkeitsausstosskopfes |
US8194254B2 (en) * | 2007-01-30 | 2012-06-05 | Hewlett-Packard Development Company, L.P. | Print device preconditioning |
JP5213367B2 (ja) * | 2007-07-02 | 2013-06-19 | キヤノン株式会社 | インクジェット記録ヘッド |
US20090033950A1 (en) * | 2007-07-30 | 2009-02-05 | Hewlett-Packard Development | Printhead preconditioning trigger |
JP4957452B2 (ja) * | 2007-08-22 | 2012-06-20 | ブラザー工業株式会社 | 液体移送装置 |
US8083323B2 (en) * | 2008-09-29 | 2011-12-27 | Xerox Corporation | On-chip heater and thermistors for inkjet |
JP2011207077A (ja) * | 2010-03-30 | 2011-10-20 | Seiko Epson Corp | 液体噴射ヘッド、液体噴射ヘッドユニット及び液体噴射装置 |
JP5510244B2 (ja) * | 2010-09-28 | 2014-06-04 | セイコーエプソン株式会社 | 液体噴射ヘッド |
JP6249682B2 (ja) * | 2013-08-27 | 2017-12-20 | キヤノン株式会社 | 液体吐出ヘッド用基板、液体吐出ヘッド、および、記録装置。 |
US20180171468A1 (en) * | 2016-12-21 | 2018-06-21 | Ncc Nano, Llc | Method for deposting a functional material on a substrate |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS58220757A (ja) * | 1982-06-18 | 1983-12-22 | Canon Inc | 液体噴射記録装置 |
US4899180A (en) * | 1988-04-29 | 1990-02-06 | Xerox Corporation | On chip heater element and temperature sensor |
US5095321A (en) * | 1988-10-31 | 1992-03-10 | Canon Kabushiki Kaisha | Liquid jet recording head joined by a biasing member |
US4910528A (en) * | 1989-01-10 | 1990-03-20 | Hewlett-Packard Company | Ink jet printer thermal control system |
-
1989
- 1989-11-30 DE DE90900098T patent/DE58905857D1/de not_active Expired - Fee Related
- 1989-11-30 JP JP2500549A patent/JPH04506481A/ja not_active Withdrawn
- 1989-11-30 WO PCT/EP1989/001452 patent/WO1990006851A1/de active IP Right Grant
- 1989-11-30 EP EP90900098A patent/EP0448578B1/de not_active Expired - Lifetime
-
1991
- 1991-06-14 US US07/715,782 patent/US5191360A/en not_active Expired - Lifetime
Non-Patent Citations (1)
Title |
---|
See references of WO9006851A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE58905857D1 (de) | 1993-11-11 |
WO1990006851A1 (de) | 1990-06-28 |
EP0448578B1 (de) | 1993-10-06 |
JPH04506481A (ja) | 1992-11-12 |
US5191360A (en) | 1993-03-02 |
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Legal Events
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