EP1433613A1 - Tintenbehälter mit Tintenspeicher aus thermoplastischem Fasermaterial - Google Patents
Tintenbehälter mit Tintenspeicher aus thermoplastischem Fasermaterial Download PDFInfo
- Publication number
- EP1433613A1 EP1433613A1 EP03029695A EP03029695A EP1433613A1 EP 1433613 A1 EP1433613 A1 EP 1433613A1 EP 03029695 A EP03029695 A EP 03029695A EP 03029695 A EP03029695 A EP 03029695A EP 1433613 A1 EP1433613 A1 EP 1433613A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ink
- ink reservoir
- reservoir
- container according
- thermoplastic
- 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.)
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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
- B41J2/17503—Ink cartridges
- B41J2/17513—Inner structure
Definitions
- the invention relates to an ink container according to the preamble of claim 1 an ink reservoir made of thermoplastic fiber material, in particular a cartridge for an inkjet printer. Furthermore, the invention relates to a method according to the The preamble of claim 12 for the production of such an ink container and the Use of such an ink container for inkjet printing.
- Ink containers such as ink cartridges for inkjet pens or inkjet printers, often contain ink absorbers for capillary storage of the ink.
- the Ink absorbents serve to cap one of the in the ink tank by capillary forces Extraction of ink to produce opposing negative pressure and the ink at a Mechanically dampen acceleration of the ink tank.
- ink absorbers provided ink containers also allow for a traveling Arrangement of ink cartridges on a printer carriage as well as a reliable supply the printhead with ink. It also prevents the generated by the capillary forces Negative pressure a leakage of the ink from the ink print head.
- ink reservoirs made from these materials have various disadvantages.
- polyurethane foam takes aqueous ink poorly what makes a complex vacuum filling necessary.
- Melamine foam is in this More suitable in terms of this, however, there is the problem of resistance to hydrolysis.
- the structure of melamine foam is very brittle, which creates particles that cause problems in the nozzle structures of the printhead.
- the mechanical properties of a material are also suitable for use as Ink storage is crucial. For example, glide plays a role when the ink reservoir is inserted into the plastic housing of the ink cartridge. So that Ink storage can perform its function, it is necessary that the ink storage the ink chamber of the container is substantially complete and uniform fills out and has no folds or bent corners. Such assembly errors can lead to undesirable ink inclusions or air channels and thereby the Ink yield of the ink cartridges and the print quality negatively affect.
- the mechanical dimensional stability of the ink storage material is also important, since the Automation of the assembly process is affected. A soft material, the one has poor dimensional stability, can only be done at considerable expense Process special assembly devices automatically.
- the polyurethane sponge previously used as a material for ink storage has furthermore the disadvantage that, due to sponge inhomogeneities (pore size, Wetting properties), the ink absorbed in a vacuum filling process can no longer be removed from individual sponge areas, whereby the Ink storage yield also drops. It also affects an inhomogeneous Pore size distribution in the ink storage material negatively affects the ink flow Printhead off. This causes the specific flow resistance that the material opposite the flow of the ink liquid, within a production series is also subject to fluctuations. Accurate reproducibility of the specific Flow resistance of the ink storage material is, however, of high quality for producing Inkjet printing is necessary because this is the only way to get the optimal amount of ink from the Ink storage reaches the printhead.
- EP 1 205 594 A1 describes a method for producing an ink reservoir Known fiber material, In this process, the fiber material is pretreated hydrophilically and then formed into a strand of fibers. The fiber strand will eventually open up Length cut into individual fiber strand elements.
- US 2002/0113853 A1 discloses an ink cartridge with a fiber ink storage.
- the fiber material used is compressed before it is inserted into the ink cartridge and then cut into shape so that the fiber material after insertion in the ink cartridge lies as evenly as possible on the inner wall of the ink cartridge.
- thermoplastic fiber material can also be used Manufacture with higher densities, but there has been no need for such materials.
- Initial tests with such high-density fiber materials have shown that that the specific flow resistance that the material opposes to the flow of the ink rises sharply. This makes the materials in terms of use as Ink storage little suitable.
- the high density fiber materials in relation to the flow resistance that the Oppose the flow of the ink behave strongly anisotropically. This means that the specific flow resistance depending on the direction of the ink flow through the Fiber material varies. This property is when using the materials as an ink reservoir usually disadvantageous because there is a dependency on the specific flow resistance the orientation with which the fiber material is used as an ink reservoir, leads.
- the present invention therefore has for its object to provide an ink container in which a Ink storage is used, which does not have the disadvantages described above.
- the ink reservoir inserted into the ink container is said to be mechanically stable be, have good sliding properties compared to the plastic housing and itself due to sufficient capillarity, a suitable specific flow resistance good absorption capacity for aqueous ink, the most complete release possible Characterize ink and a chemically inert behavior towards aqueous ink.
- this object is achieved by an ink container with the features Claim 1 solved. Furthermore, the object is achieved by a method according to claim 12 solved for the manufacture of an ink tank.
- FIG. 1 shows an electron micrograph of the surface of a non-reworked fiber material made of nylon fibers ("bonded nylon fibers" from Filtrona with a density of 0.180 g / cm 3 ). It can be clearly seen that a large number of fiber loops appear on the surface and the above-mentioned skin is thereby formed on the surface.
- Fig. 2 shows the same material in electron micrograph, the Interior of the material after the manufacturing process by cutting off the surface has been exposed. Here you can clearly see that the material is facing outwards Has fiber ends.
- the surface of the material is intended for the purposes of the present invention Area of material to be understood that differs from the extreme limit of the Material extends to about 1 mm inside the material.
- an ink storage medium can be obtained that the one hand desired ink storage properties, especially with regard to sufficient Capillarity and the associated high retention force for the ink and the desired ones has mechanical properties, and on the other hand the disadvantage of too high specific flow resistance when ink liquid flows through the storage material overcomes.
- the specific flow resistance is intended in the sense of the invention the flow resistance can be understood in relation to the distance traveled.
- FIG. 3 shows a pressure diagram in which the negative pressure is plotted, which a fiber material made of nylon fibers ("bonded nylon fibers" from Filtrona with a density of 0.180 g / cm 3 ) opposes the flow of an aqueous ink.
- the step shape of the graphs results from the fact that a changing volume flow was used.
- the upper graph, shown in bold, shows the pressure profile for a non-reworked fiber material, while the bottom graph, not shown in bold type, shows the pressure profile for a fiber material reworked by cutting off the surfaces.
- the step height ⁇ X is a relative measure of the flow resistance that the material opposes to the flow of the ink liquid. It can be clearly seen here that the post-processed material has a lower flow resistance than the non-post-processed material.
- the post-processing of the fiber material can be done by various processes.
- the fiber material can be used after the actual manufacturing process mechanical processing, such as punching, cutting and / or grinding, reworked in this way be that on one, on several or on all of its sub-surfaces has externally directed fiber ends.
- thermoplastic fiber material is preferably a material which is made of polyamide fibers. Particularly good results are obtained when using a thermoplastic fiber material made of nylon fibers, which immediately after the extrusion in a compression process and thus in the Means are aligned in parallel.
- thermoplastic fiber materials which are predominantly characterized by heterogeneous alignment of the fibers to each other are characterized. In such There is no predominant parallel orientation of the fiber materials to one another, rather, the fibers lie in the form of a largely disordered three-dimensional Tangle before, resulting in good dimensional stability and advantageous mechanical Properties leads.
- the properties of the fiber material can in the sense of present invention can be further improved by using fiber material is in which the thermoplastic fibers with each other at their points of contact are at least partially bound. This bond between the fibers can can be achieved in particular in that the fibers by a thermal action melted together at their points of contact and thus bound together become.
- the thermal treatment can, for example, already during the manufacturing process of the fiber material and before its post-processing in the sense of the present Invention.
- the ink stores used according to the invention are formed from a thermoplastic fiber material which has an average density of approximately 0.155 to 0.300 g / cm 3 . It has been shown that fiber materials with a density of less than about 0.15 g / cm 3 have a retention force which is too low for many ink container shapes when using aqueous inks. With such materials, the capillarity is too low to achieve a good printing result. There is also a risk of ink leakage from a print cartridge. On the other hand, in the case of fiber materials with an average density of greater than approximately 0.300 g / cm 3, the absorption capacity of the material for ink is too low to be used as an ink storage medium. In addition, densities above 0.300 g / cm 3 lead to fiber materials with changed mechanical properties, which lead to a deterioration in the suitability of the fiber materials as an ink reservoir.
- the post-processing of the fiber material described can furthermore achieve that the material in terms of specific flow resistance, the flow rate opposed to a liquid is isotropic. This means that the specific Flow resistance is independent of the direction in which the liquid moves the material flows.
- thermoplastic fiber material is typically produced in one continuous process.
- US 3 313,665 describes processes in a first step using fibers or filaments constant feed in a chamber closed on one side. There are these first evenly distributed with compressed air. The distribution of the fibers can be directional or be confused.
- the next part of the chamber is constructed so that the two-dimensional Cross-sectional shape of the ink storage material due to a gradual conical narrowing is achieved. So that this shape can be stabilized, steam is injected with the effect of which the individual fibers are bonded. So that will the three-dimensional shape stabilized.
- At the end of the chamber is an extractor which is coupled to the feed device. By setting the speed difference these two devices can control the dynamic pressure in the chamber become.
- the density of the ink storage material is the back pressure and the input mentioned compressed air set.
- the invention further relates to a method for producing an ink container, which is characterized by the properties mentioned above.
- the process includes at least the steps of providing a container with at least one Ink chamber and at least one ink reservoir made of thermoplastic fiber material, which is treated on at least one of its surfaces so that the original External surface is removed in such a way that the treated surface to the outside has directed fiber ends, and the insertion of one or more ink storage into the ink chamber (s) of the container.
- the further advantage is that due to the good mechanical properties of the Fiber materials in the sense of the invention the automation of the assembly process is facilitated and the manufacturing costs for the ink tank decrease.
- thermoplastic is used as the ink reservoir Material used on the surfaces, when used as intended not parallel or on average normal to the direction of flow of the ink, the original External surface is removed. Particularly good results are achieved if a thermoplastic material is used in which the on all surfaces original outer surfaces are removed.
- the removal of the original outer surfaces of the ink reservoirs can be repeated all suitable procedures. Removal by is particularly preferred Cutting, punching and / or grinding. As a rule, these are particularly good ones Results achieved when removing the original surface to a depth of at least about 1 mm. In special cases, however, ablation can also take place down to a depth of less than 1 mm because this controls the Flow resistance that the treated surface opposes to the flow of ink, becomes possible.
- thermoplastic fibers By treating the material made of thermoplastic fibers according to the invention becomes, as already explained, a reduction in the specific flow resistance reached that the material opposes the flow of an ink liquid.
- This Reduction in flow resistance makes the materials for use as ink storage suitable at all.
- it can also be beneficial to a surface of the material first by removing the original External surface was treated, then a thermal treatment undergo, which leads to a defined increase in flow resistance.
- the method was preferably such that an ink storage device is used, the Shape and size essentially the shape and size of the respective ink chamber corresponds in which the ink storage is inserted. In other cases, however, it can also be advantageous to use an ink storage device, the shape and size of which Shape and size of the interior of the respective ink chamber deviates, in which the Ink storage is used.
- the method for producing the ink container is preferably carried out in such a way that that the ink chamber is filled with ink after the ink storage is inserted and is then closed.
- Another object of the invention is the use of the ink tank for inkjet printing, especially in the form of a printer cartridge.
- the ink containers according to the invention are compared to those in the prior art known ink containers have the advantage that, in addition to chemical inertness of the Ink storage compared to the common ink liquids, which leads to a long shelf life the ink tank leads to the property of a high capacity for Ink with a good ink retention force that prevents leakage, as well as good and even flow properties of the ink within the fiber storage combine.
- the use of thermoplastic fiber materials as ink storage leads moreover to economic advantages. Through this combination of properties an ink container, in particular in the form of a printer cartridge, is provided, which in the balance of its properties is superior to previous ink containers.
Landscapes
- Ink Jet (AREA)
- Pens And Brushes (AREA)
Abstract
Description
Claims (21)
- Tintenbehälter, umfassend mindestens eine Tintenkammer, in welche mindestens ein Tintenspeicher eingesetzt ist, der aus thermoplastischem Fasermaterial gebildet ist, dadurch gekennzeichnet, dass der Tintenspeicher eine mittlere Dichte von etwa 0,155 bis 0,300 g/cm3 aufweist und dass der Tintenspeicher an einer, an mehreren oder an allen seiner Teiloberflächen durch Abtragen der ursprünglichen Außenoberfläche derart behandelt worden ist, dass die behandelte Teiloberfläche nach außen gerichtete Faserenden aufweist.
- Tintenbehälter nach Anspruch 1, dadurch gekennzeichnet, dass der Tintenspeicher an den Oberflächen, die bei bestimmungsgemäßem Gebrauch nicht parallel zur Flussrichtung der Tinte liegen, nach außen gerichtete Faserenden aufweist.
- Tintenbehälter nach Anspruch 1, dadurch gekennzeichnet, dass der Tintenspeicher an den Oberflächen, die bei bestimmungsgemäßem Gebrauch im Mittel normal zur Flussrichtung der Tinte liegen, nach außen gerichtete Faserenden aufweist.
- Tintenbehälter nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, dass der Tintenspeicher an allen Oberflächen nach außen gerichtete Faserenden aufweist.
- Tintenbehälter nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass das thermoplastische Fasermaterial aus Polyamidfasern gebildet ist.
- Tintenbehälter nach Anspruch 5, dadurch gekennzeichnet, dass das thermoplastische Fasermaterial aus Nylonfasern gebildet ist.
- Tintenbehälter nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Tintenspeicher aus thermoplastischen Fasern gebildet ist, die in überwiegend heterogener Ausrichtung zueinander verwoben sind, ohne dass eine vorherrschende longitudinale Orientierung der Fasern besteht.
- Tintenbehälter nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Tintenspeicher solchermaßen aus thermoplastischen Fasern gebildet ist, dass die thermoplastischen Fasern untereinander an ihren Berührungspunkten zumindest teilweise gebunden sind.
- Tintenbehälter nach Anspruch 8, dadurch gekennzeichnet, dass die thermoplastischen Fasern durch thermische Einwirkung untereinander gebunden sind.
- Tintenbehälter nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Tintenspeicher eine mittlere Dichte von etwa 0,160 g/cm3 bis 0,200 g/cm3 aufweist.
- Tintenbehälter nach mindestens einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass der Tintenspeicher in Bezug auf den spezifischen Flusswiderstand, der dem Durchfluss einer Flüssigkeit entgegengesetzt wird, isotrop ist.
- Verfahren zum Herstellen eines Tintenbehälters, aufweisend mindestens die folgenden Verfahrensschritte:dadurch gekennzeichnet, dass als Tintenspeicher ein thermoplastisches Fasermaterial verwendet wird, bei dem an mindestens einer seiner Oberflächen die ursprüngliche Außenfläche der Oberfläche derart abgetragen wird, dass die behandelte Oberfläche nach außen gerichtete Faserenden aufweist.Bereitstellen eines Behälters mit mindestens einer Tintenkammer,Bereitstellen mindestens eines Tintenspeichers, undEinführen eines oder mehrerer dieser Tintenspeicher in die Tintenkammer(n) des Behälters,
- Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass als Tintenspeicher ein thermoplastisches Fasermaterial verwendet wird, bei dem an den Oberflächen, die bei bestimmungsgemäßem Gebrauch nicht parallel zur Flussrichtung der Tinte liegen, die ursprüngliche Außenfläche abgetragen wird.
- Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass als Tintenspeicher ein thermoplastisches Fasermaterial verwendet wird, bei dem an den Oberflächen, die bei bestimmungsgemäßem Gebrauch im Mittel normal zur Flussrichtung der Tinte liegen, die ursprüngliche Außenfläche abgetragen wird.
- Verfahren nach Anspruch 12, dadurch gekennzeichnet, dass als Tintenspeicher ein thermoplastisches Fasermaterial verwendet wird, bei dem an allen Oberflächen die ursprüngliche Außenfläche abgetragen wird.
- Verfahren nach mindestens einem der Ansprüche 12 bis 15, dadurch gekennzeichnet, dass das Abtragen der ursprünglichen Außenfläche durch Schneiden, Stanzen und/oder Schleifen erfolgt.
- Verfahren nach mindestens einem der Ansprüche 12 bis 16, dadurch gekennzeichnet, dass mindestens eine der durch Abtragen der ursprünglichen Außenflächen behandelten Oberflächen des Tintenspeichers vor dem Einsetzen in die Tintenkammer zur gezielten Erhöhung des Flusswiderstandes, den diese Oberfläche dem Durchfluss einer Flüssigkeit entgegensetzt, thermisch behandelt wird.
- Verfahren nach mindestens einem der Ansprüche 12 bis 17, dadurch gekennzeichnet, dass ein Tintenspeicher eingesetzt wird, dessen Form und Größe im wesentlichen der Form und Größe des Innenraums der jeweiligen Tintenkammer entspricht, in die der Tintenspeicher eingesetzt wird.
- Verfahren nach mindestens einem der Ansprüche 12 bis 17, dadurch gekennzeichnet, dass ein Tintenspeicher eingesetzt wird, dessen Form und Größe von der Form und Größe des Innenraums der jeweiligen Tintenkammer abweicht, in die der Tintenspeicher eingesetzt wird.
- Verfahren nach mindestens einem der Ansprüche 12 bis 19, dadurch gekennzeichnet, dass die Tintenkammer, in die der Tintenspeicher eingesetzt wird, anschließend mit Tinte befüllt und verschlossen wird.
- Verwendung des Tintenbehälters nach mindestens einem der Ansprüche 1 bis 11 für den Tintenstrahldruck.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE2002161544 DE10261544A1 (de) | 2002-12-23 | 2002-12-23 | Tintenbehälter mit Tintenspeicher aus thermoplastischem Fasermaterial |
| DE10261544 | 2002-12-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1433613A1 true EP1433613A1 (de) | 2004-06-30 |
| EP1433613B1 EP1433613B1 (de) | 2009-07-15 |
Family
ID=32404364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20030029695 Expired - Lifetime EP1433613B1 (de) | 2002-12-23 | 2003-12-23 | Tintenbehälter mit Tintenspeicher aus thermoplastischem Fasermaterial |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP1433613B1 (de) |
| DE (2) | DE10261544A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112888576A (zh) * | 2018-09-20 | 2021-06-01 | 波雷克斯科技公司 | 非均质纤维流体储存器 |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0756935A2 (de) * | 1995-08-02 | 1997-02-05 | Canon Kabushiki Kaisha | Absorbierer eingebaut in einen Tintenbehälter und Verfahren zur Herstellung des Behälters |
| EP1043163A2 (de) * | 1999-04-05 | 2000-10-11 | Canon Kabushiki Kaisha | Tintenabsorber, Tintenbehälter, Tintenstrahlpatrone, Verfahren zum Herstellen des Tintenabsorbers und Verfahren zum Herstellen des Tintenbehälters |
| US20010009432A1 (en) * | 1999-10-29 | 2001-07-26 | David Olsen | Ink reservoir for an inkjet printer |
| EP1205594A1 (de) * | 2000-11-09 | 2002-05-15 | Canon Kabushiki Kaisha | Verfahren zur Herstellung eines Faseraggregats, Faseraggregat und Flüssigkeitsbehälter damit versehen |
| EP1258363A1 (de) * | 2001-05-10 | 2002-11-20 | Canon Kabushiki Kaisha | Tintenbehälter |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10059130A1 (de) * | 1999-12-03 | 2001-06-07 | Microjet Technology Co | Tintenspeicher-Material für Tinten-Patronen |
-
2002
- 2002-12-23 DE DE2002161544 patent/DE10261544A1/de not_active Ceased
-
2003
- 2003-12-23 DE DE50311706T patent/DE50311706D1/de not_active Expired - Lifetime
- 2003-12-23 EP EP20030029695 patent/EP1433613B1/de not_active Expired - Lifetime
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0756935A2 (de) * | 1995-08-02 | 1997-02-05 | Canon Kabushiki Kaisha | Absorbierer eingebaut in einen Tintenbehälter und Verfahren zur Herstellung des Behälters |
| EP1043163A2 (de) * | 1999-04-05 | 2000-10-11 | Canon Kabushiki Kaisha | Tintenabsorber, Tintenbehälter, Tintenstrahlpatrone, Verfahren zum Herstellen des Tintenabsorbers und Verfahren zum Herstellen des Tintenbehälters |
| US20010009432A1 (en) * | 1999-10-29 | 2001-07-26 | David Olsen | Ink reservoir for an inkjet printer |
| EP1205594A1 (de) * | 2000-11-09 | 2002-05-15 | Canon Kabushiki Kaisha | Verfahren zur Herstellung eines Faseraggregats, Faseraggregat und Flüssigkeitsbehälter damit versehen |
| EP1258363A1 (de) * | 2001-05-10 | 2002-11-20 | Canon Kabushiki Kaisha | Tintenbehälter |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112888576A (zh) * | 2018-09-20 | 2021-06-01 | 波雷克斯科技公司 | 非均质纤维流体储存器 |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1433613B1 (de) | 2009-07-15 |
| DE10261544A1 (de) | 2004-07-15 |
| DE50311706D1 (de) | 2009-08-27 |
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