EP2244881A2

EP2244881A2 - Method and device for refilling an ink cartridge for an ink-jet printer

Info

Publication number: EP2244881A2
Application number: EP09712453A
Authority: EP
Inventors: Roland Steiner; Daniel Sulser; Joachim Kretschmer; René Butty; Migjen Rahimi; André Huber
Original assignee: Pelikan Hardcopy Production AG
Current assignee: Pelikan Hardcopy Production AG
Priority date: 2008-02-22
Filing date: 2009-02-04
Publication date: 2010-11-03
Also published as: DE102008010506A1; WO2009103421A2; WO2009103421A4; WO2009103421A3

Abstract

The invention relates to a device for refilling an ink cartridge (10 or 13) for an ink-jet printer, comprising a printer head (16) provided with nozzles, or an ink outlet that can be coupled to the ink supply of an ink-jet head. Either the nozzles of the printer head are directly connected by a fluidic connection or, in the event of an ink outlet that can be coupled to the ink supply of an ink-jet head, said opening is fluidically connected, especially by means of a wick and/or a valve, to an ink storage element arranged inside the ink cartridge and comprising a mechanism producing a low pressure or a material which is absorbent for example. The device according to the invention comprises an ink container (11) filled with ink and having a aeration opening (29) and an ink outlet (18) through which an element that can be fluidically connected by the ink (19) extends and on which the ink cartridge (10 or 13) or the ink storage element thereof can be docked, producing a fluidic connection. The ink flow from the ink container (11) into the cartridge (10 or 13) to be filled is generated by means of an excess pressure.

Description

"Method and Apparatus for Refilling an Ink Cartridge for an Ink Jet Printer"

Description

The invention relates to a device for refilling an ink cartridge for an inkjet printer according to the preamble of claim 1.

When refilling ink cartridges for ink jet printers with ink, a distinction is made between cartridges with integrated printheads on the one hand and cartridges with an ink outlet opening that can be coupled to the ink supply of an ink jet head. The aforementioned printheads include a plurality of very fine jet nozzles through which the ink is transferred to a print carrier. In the case of cartridges which have an ink outlet opening which can be coupled to the ink supply of an inkjet head, a wick is usually arranged therein, which is in fluid communication with an ink storage element arranged inside the ink cartridge and consisting of absorbent material. In multi-color ink cartridges, a predetermined number of jet nozzles are assigned to a predetermined color, respectively.

In cartridges with integrated printheads, the aforesaid nozzles are directly in fluid communication with the ink storage element disposed within the cartridge. The ink storage element is made in a manner well known in the art of either fibrous material or foam. Other negative pressure generating mechanisms are known in the art to ensure metered ink transfer within the ink cartridge to the nozzles or to the ink outlet port. Since these mechanisms also have memory function, They are also summarized below under the term "ink storage element".

Cartridges with integrated print heads must be opened very carefully (opened) and closed again for refilling with ink. This is associated with correspondingly great effort and actually for ink cartridges, with their relatively small quantities not profitable.

There are also known as syringe refill systems for ink cartridges of the aforementioned type. With their help, e.g. to refill an original cartridge. The corresponding refill kits usually include a drill, a hot glue gun, multiple syringes with cannula, ink, rubber bands and closure means. These commercially available systems are characterized by unwieldiness and disproportionate effort in terms of material and tools.

Also commercially available are so-called "compatible cartridges." These cartridges do not contain an electronic chip, which must be disassembled from the empty original cartridge and mounted on the "compatible cartridge" again. Again, this requires skill and tools as well as glue.

Cartridges with integrated printhead are traded on the recycling market at relatively high prices. These used cartridges must be mechanically opened, cleaned and replaced with a new ink storage element, e.g. Sponge od. Like. Be provided. Then they are filled with ink and the filled cartridge is closed again. This work can be expertly carried out only at special refill companies; The user himself is usually overwhelmed with this form of refilling.

The prior art is additionally referred to the DE 197 37 177 Al. From this document is an apparatus and a method for refilling a

Ink cartridge known in which the re-filling from a refillable ink cartridge via an intermediate core. Even such Wiederb efüllungsver drive is complicated and difficult to perform by untrained.

In all devices and methods according to the prior art, no measures are taken, the leaks in the preparation, during refilling and safely avoid reclosing from the ink container, whether through the vent opening or through the capillary element.

It is also known from the prior art (see, for example, EP 1 651 444 B1) to provide ink cartridges which can be used directly in ink jet printers with compartments / openings of different shape and size which are present when the cartridge is inserted into the printer with projections in the cartridge receptacle The printer interacts to ensure the correct positioning on the one hand and on the other hand the use of the correct cartridge, eg according to type or color.

The invention has for its object to provide a device for refilling an ink cartridge for an ink jet printer, in addition to safe handling by unskilled users (end users) without the risk of ink leakage, cartridges or inks (color, quality) -a variety very fast refilling an empty cartridge allowed.

This object is achieved according to the invention with the features of claim 1. Advantageous developments and structural details are specified in the dependent claims.

The invention relates to a "capillary refill system." For refilling an ink cartridge, not only its capillary suction force is utilized, but additional pressure assistance is used to accelerate the filling process This wicker contains a wick that has been immersed in ink, and the wick comes out of the top of the ink tank and is positioned to create a capillary connection with the attached ink cartridge, either with the integrated printhead nozzles or with the nozzle The ink tank preferably still has a ventilation or pressure equalization opening, so that ink can be absorbed capillary by the attached ink cartridge unhindered to fill the ink tank.

With a designed according to the invention, the secure loading of an ink cartridge is achieved in that the Tintenauslaßöffnung of the ink container one or more positioning and / or identification elements for identifying at least one refillable ink cartridge and for the exact positioning of the Ink cartridge are associated with respect to the capillary in the ink outlet. This reliably prevents confusion of the cartridges or incorrect filling of cartridges can occur. This positioning or identification elements can be assigned at the same time sealing elements that reliably prevent leaks during insertion or removal and during the filling of an ink cartridge.

It is conceivable to arrange a plurality of positioning elements for different ink cartridges (e.g., different sized ink cartridges) on the top of the ink container, as far as these different cartridges are filled with the ink, e.g. of the same quality and the same color should be filled.

It is crucial that the refilling of ink cartridges can be done in a simple manner without the use of tools and within a very short time, without any li risk of contamination. There may be ink portions with different

Coloring and possibly quality can be provided as cheap disposable items by the trade. Original cartridges can be filled several times using the device according to the invention.

The erfϊndungs contemporary device is designed so that contact with open ink is absolutely avoided and thus a risk of contamination of the user or the environment is excluded. The risk of injuries, such as When refilling cartridges by means of syringes is also avoided. The refilling operation of an ink cartridge is much faster compared to spraying and other refilling operations, and no mechanical action (e.g., boring) is required. Likewise, eliminating the closing of the corresponding hole after refilling. All of this work takes a relatively long time and requires great skill and the use of special tools. With the device according to the invention, these disadvantages are avoided. The ink portions in the device can be sized so that no residual ink remains in the ink container.

Experiments have shown that the Tintenspr eicher element of the ink cartridge is completely filled only by utilizing the capillary Tifltenflusses after about 2.5 to a maximum of 5.0 minutes of suction time. With the inventive pressure support, in particular according to claims 1 to 12, the filling time can be reduced by up to about 70%. That is, after this period of time, the ink storage element is saturated. The pressure equalization opening, which can also serve to fill the ink tank according to the invention, is dimensioned so that the outer barrier pressure is always greater than the discharge pressure. Thus, through this opening no ink from the. Leak container. The same applies to the wick of the device according to the invention.

The device according to the invention comprises essentially four green elements, namely the ink container, the ink therein as an ink supply, an ink outlet opening on the ink container, to which the cartridge with its

Ink outlet is coupled, and an additional measure to increase the pressure in the ink flow.

The mentioned ink outlet opening of the ink container is formed, dimensioned and arranged so that it can be easily brought into contact either with the nozzles formed in the print head of the ink cartridge or with a wick disposed in the ink outlet opening of the ink cartridge to create a fluid connection. In the latter case, the wick of the ink container is made of a softer material than the wick of the ink cartridge so that the wick of the ink cartridge does not deform due to contact with the wick or valve of the ink container. This is important to ensure the fluid connection between the ink cartridge and the ink supply of an ink jet head, even after refilling the cartridge.

In a preferred embodiment of the invention, the wick of the

Ink tank through the bottom of a Wannεxtigen depression at the top of the ink tank through. This trough-like depression serves on the one hand to the fact that possibly from the wick of the ink container or after Wiederb filling the ink cartridge from this leaking ink is collected. On the other hand, this trough-like depression serves to properly position the cartridge for infestation. In this respect, the trough-like depression on the one hand provides additional protection against contamination; on the other hand, it is an essential element of the invention by assuming leadership, identification and positioning function.

At least one - preferably several - groove-shaped receiving opening (s) for receiving the ink cartridge can be formed on the upper side of the ink container. Within this groove-shaped receptacle, the ink cartridge is so placeable and held in particular clamping that either the nozzles in the integrated print head of the cartridge or alternatively the wick in the Tintenauslaßöffnung under formation of a capillary with the wick of the ink container positionally come into contact or comes.

For this purpose, the various positioning or identification elements are provided for the exact positioning and identification of the ink cartridge to be filled again. It is conceivable that positioning and identification elements are designed as one and the same element (for example as a receiving groove). For example, at least two, in particular cross-extending grooves for differently wide ink cartridges may be arranged on the upper side of the ink container. Accordingly, of course, the receiving grooves themselves have different widths. In addition to such receiving grooves can be arranged as identification elements on the ink container positive or negative x-, y-, z- or any other contour shape having projections corresponding to negative or positive corresponding outline having projections on the cartridge.

The above-mentioned ventilation or pressure equalization opening at the top of the ink container preferably also serves as Tintennachfüllöffnung for the Tintenbehäl- ter.

The ink tank should have a footprint that is sized so that even with coupled and thereby extending beyond the peripheral edge of the ink tank addition ink cartridge sufficiently high stability is ensured. Accordingly, the ink container according to the invention is relatively flat and relatively wide. Preferably, the ink container has a truncated cone, truncated pyramid or spherical cap base body with a circular or rectangular bottom.

The wick in the ink container is sufficient for completely emptying it to the bottom and is arranged within a fluid-permeable, preferably also extending to the bottom of the ink tank cage. This cage may comprise at least three evenly distributed over the circumference arranged, in particular integrally connected to the ink tank or its upper side vertical sweep. For the complete emptying of the ink container, it is advantageous if the bottom of the ink container drops towards the bottom end of the wick. Before use, the wick Hes ink tank and its Tin.ten.full- and pressure equalization opening are sealed by a sealing strip .. This seal strip - an adhesive strip or the like - can also serve to close the ink tank before disposal of the same. The mentioned sealing strip is preferably placed within one, in particular at a plurality of receiving grooves within the wider receiving groove for an ink cartridge such that it projects beyond the free edge of the receiving groove to form a grip tab on the side facing the Tintenfull- and pressure equalization opening. This ensures that, upon removal of the sealing strip prior to first use of the device of the invention, first the trough-shaped depression within which the wick extends and then the ink fill and pressure equalization opening are opened before the wick is released. Thus, during the first use, venting or pressure equalization first takes place via the wick of the ink container projecting into the trough-shaped depression, so that there is no danger that ink will inadvertently escape via the vent opening during removal of the sealing strip due to an overpressure within the container escapes or even squirts out of the ink tank. Such overpressure can arise, for example, in a relatively warm environment. Thus, according to the invention, it is always ensured that pressure equalization is first established between the interior of the ink container and the external environment.

It is also advantageous, at least partially, preferably completely, to produce the ink container from transparent material, in particular from plastic. This allows the user to see if the ink container still contains ink and what color the ink has.

A particularly simple embodiment of the invention is characterized in that the device for refilling an ink cartridge comprises an ink-filled container having an opening through which the ink storage element via the nozzles of the print head or the ink outlet opening of the ink cartridge is directly brought into contact. In this embodiment, therefore, eliminates the capillary in the container opening, which is designed in particular as a wick. As a result, the device is even easier without the functionality is impaired.

The risk of pollution, the already ϊst very small in a device according to the invention, _Y can also be reduced or completely avoided by providing for the opening of the container at the top thereof and the cross section of the outer contour the print head comprising the nozzles or the ink outlet opening of the ink cartridge is formed accordingly, and preferably the B ehälter opening and / or the edge regions of the positioning elements still by sealing strips, in particular of elastomer or rubber, seals. These sealing strips are then preferably dimensioned so that they lie in docked ink cartridge to the ink tank fluid-tight at the print head or Tintenauslaßöffnung.

For complete emptying of the ink container, it is advantageous if the receiving grooves for the ink cartridge at the top of the Tintenb ehälters are formed so that the nozzles of the print head or the Tintenauslaßöffnung the ink cartridge in

Dock it to the bottom of the ink tank. Ultimately, this depends on the length of the printhead comprising the nozzles or the channel delimiting the ink outlet opening. Ink tank and ink cartridge should therefore be coordinated so that a complete emptying of the ink tank when docking the ink cartridge is easily possible.

Before the first use, the container opening must of course be closed or covered. For this purpose, the container opening, via which the fluid contact to the ink storage element of the ink cartridge can be produced, preferably by a film, in particular duicb. a sealing strip closed. Before the first use, this sealing strip is then removed. After use, the container opening can be closed again by another sealing strip. It is also conceivable that the sealing strip is held by a re-adhesive cold adhesive, so that the container opening can be closed again with the original sealing strip.

In the latter embodiment, a separate venting or pressure equalization opening may preferably be provided in the ink container, which is preferably arranged within a container depression. This ventilation or pressure equalization opening must be closed before the first use. A sealing strip, in particular the same sealing strip with which the opening for docking the ink cartridge is sealed, is preferably used for this purpose.

The pressure build-up for faster filling of the cartridge to be filled can be constructed according to the invention in different ways. In a simple way, it is conceivable, for example, to apply the principle of the communicating tubes filling ink or the ink container are arranged higher than the ink inlet of the cartridge to be infested.

It is just as easy to "turn the cartridge and ink container with the ink to be refilled" so that the ink container stands on top of the cartridge It is also conceivable that the interior of the ink container is subdivided by an intermediate wall into a pressure chamber and an ink chamber.The increased / higher pressure in the pressure chamber can then be achieved by appropriate design measures when the cartridge to be filled is tightly applied to the ink (Opening a valve / opening, membrane, etc.) are delivered.

It is also conceivable to provide mechanical or electrical pressure generators in or on the ink container (as installations or attachments or as attachment elements). The build-up of overpressure can also be done by centrifugal force (acting on ink or ink tank) or by heating of ink or ink tank.

Of course, it is also conceivable, e.g. via the ventilation opening of the cartridge to be filled in this one vacuum to accelerate the filling process to produce.

Hereinafter, preferred embodiments of a device according to the invention will be explained in more detail with reference to the accompanying drawings. It shows:

1 shows a first embodiment of a device according to the invention

Refilling an ink cartridge in a perspective top view from above;

Fig. 2 shows a cross section through the apparatus of Fig. 1 along the line II-II in

Fig. 1;

Fig. 3 is a perspective Untetansicht the upper part of the ink container of

Apparatus according to Fig. 1;

4 shows the ink container of Figure 1 with attached ink cartridge in side view. Fig. 5 shows the apparatus of Figure 1 in plan view showing the coupling of two ink cartridges of different widths (schematically).

6 shows a modified embodiment of a device according to FIG. 1 in a perspective view obliquely from above; FIG.

Fig. 7 shows a further modified imple mentation form of the apparatus of Figure 1 in a perspective view obliquely from above ..;

8 shows an embodiment corresponding to Figure 1 with a cap, in a perspective view obliquely from above ..;

FIG. 9 shows the closure lid according to FIG. 1 in a perspective bottom view and on an enlarged scale; FIG.

10 shows a further alternative embodiment of the device according to the invention with a schematic representation of the ink cartridge to be coupled; and

Fig. 11, the imple mentation form of FIG. 10 with the ink cartridge in the coupled state.

In the first embodiment of the invention (FIGS. 1 to 5) of an apparatus for refilling an ink cartridge 10 or 13 (see FIG. 5) for an inkjet printer with an ink outlet opening 16 (see FIG. 4) which can be coupled to the ink supply of an inkjet head. which is in fluid communication via a wick (not shown) with an ink cartridge 10 disposed within the ink cartridge 10 and which is made of absorbent material, the apparatus comprises an ink filled container 11 having an ink outlet port 18 in which an ink immersed in the ink 19 and with the. Ink storage element of the ink cartridge 10 is in contact capillary element in the form of a wick 20 is located. The wick 20 is conventionally made of fibrous material with high capillary action in the wick longitudinal direction (in the axial direction). This wick 20 is for refilling an ink cartridge in the illustrated embodiment with the arranged in the ink outlet opening 16 of the ink cartridge 10 wick in contact, the wick 20 of the ink tank 11 made of softer or more yielding material than the wick of the ink teαpatrone made is, so that the wick of the ink cartridge 10 remains substantially undeformed by the contact with the wick 20 of the ink container 11. The contact in the filling position between the two aforementioned wicks of ink sheet 11 and ink cartridge 10 is indicated in FIG. The ink container 11 of the embodiment according to FIGS. 1 to 5 comprises a circular bottom 21 and a spherical cap 22. The wick 20 of the ink container 11 extends through the bottom 23 of a trough-shaped recess 24 at the top of the ink container, in the trough-like recess 24 in, as clearly shown in Fig. 2. At the top of the ink tank 11, two cross-shaped groove-shaped positioning members (receiving openings) 25, 26 for ink cartridges 10 and 13 of different widths (see Fig. 5) are formed. Within these positioning elements 25, 26, the correspondingly wide ink cartridge 10 and 13 with respect to the Tintenauslaßöffnung or the Kapülarelement (wick 20) precisely placed, in particular clamped. Thus, the capillary member (wick 20) in the ink container 11 securely comes in contact with the wick in the ink outlet port 16 of the ink cartridge to make a fluid or capillary connection. Each of the two positioning elements 25, 26 has an Anformung or a stop 27, 28 frontally for the exact positioning of the wiederzufefüllenden ink cartridge with respect to the Tintenauslaßöffnung or capillary (wick 20).

Within the trough-like depression 24 at the top of the ink tank 11, a venting or pressure equalization opening 29 is provided which can also be used as an ink refill opening for the ink tank 11. The mode of operation has already been described in detail in the introduction to the description.

Instead of a trough-like depression 24, two or more trough-like depressions may also be provided in the upper side of the ink tank 11, one of which contains the ink outlet opening or the capillary element (wick 20). The trough-like depression may have different contours in the bottom or side surfaces, which correspond directly to the contours on corresponding projections of the ink cartridge 10 or 13, in order to ensure a clear positioning with respect to the ink outlet opening or the capillary element (wick 20 ) to guarantee. These moldings on the ink container 11 and ink cartridge 10 and 13, respectively, may have positive or negative contour shapes in, for example, x, γ, z, or any other shape of outline for the absolutely secure identification of a cartridge and the quality of the ink to be filled. Color, etc. - see Fig. 1. At the edge region of the trough-like recess 24 may be circumferentially soft elastic sealing elements 47 for fluid-tight sealing between cartridge 10 and 13 and inkb ehälter 11 may be arranged. The bottom 21 of the Tintenb ehälters 11 defines a footprint, which (see Figures 4 and 5) is dimensioned so that even when coupled, and thereby extending beyond the peripheral edge of the ink tank 11 away ink cartridge 10 and 13 during the filling process sufficient Stability is guaranteed.

In Fig. 2, the structural design of an ink tank 11 is shown with an overpressure for the filling process producing additional device: The interior of the ink tank 11 is divided by an intermediate wall 50 in a pressure chamber 51 and an ink chamber 53. In the pressure chamber 51, there is such an overpressure that this is sufficient when placing the cartridge to be filled and escape into the ink chamber 53 (not shown in Fig. 2) to push the entire amount of ink from the space 53 through the Tintenauslaßöffnungen in the cartridge. The opening of the connection 52 between the pressure and ink space, can be done automatically when sealing the cartridge to the ink tank or by triggering by the user.

From FIGS. 2 and 3, it can be seen that the wick 20 of the ink tank 11 is formed so as to extend to the bottom of the ink tank 11. It is held in position within a fluid-permeable cage 30, preferably also extending down to the bottom of the ink container 11. The cage 30 for the wick 20, in the illustrated embodiment, is uniformly distributed circumferentially, integral with the top 22 of the ink container 11 connected vertical webs 32, which keep the wick 20 centered within the opening 18. The bottom 21 (see FIG. 2) of the ink tank 11 drops toward the bottom end of the wick 20. This ensures a complete emptying of the container 11 of ink.

The wick 20 of the ink container 11 and its pressure compensation opening 29 are closed by a peel seal strip 14. The sealing strip 14 can be placed in one, in this case in the wider positioning element 25 for an ink cartridge (here ink cartridge 13 according to FIG. 5), in such a way that it faces the free edge 48 on the side facing the ink filling or equalizing opening 29 the receiving groove 25 projects to form a grip tab 33. This ensures that when pulling off the sealing strip 14 first the trough-shaped recess 24 and thus over the wick 20 extending into it, the interior of the ink tank 11 are vented before the venting or pressure equalization opening 29 is released. Thus, a possible overpressure within the container 11 is reduced before the first use. After use, the trough-shaped recess 24 and the opening 29 with the sealing strip 14 or a beüebi- other adhesive strips are closed again. This ensures that, prior to disposal, ie after use of the device described, also soiling can be avoided.

The embodiment according to FIG. 6 has a lenticular basic structure. The bottom 21 is accordingly also cup-shaped. In order to ensure the StaGdsicherneit, at least three uniformly arranged over the circumference ribs 34 are integrally formed on the bottom 21, the horizontal lower edges define the footprint. All matching components in Figures 6 and 7 are designated by the same reference numerals as in the embodiment of Figs. 1-5.

The imple mentation form of FIG. 7 differs from the imple mentation form after. Figures 1 to 5 only in that the container 11 has a truncated cone-shaped basic structure.

Of particular importance are still vertical clamping ribs 35 at the four inner boundary corners between the intersecting positioning elements 25, 26 for the different widths ink cartridges 10 and 13. These diagonally to the wick 20 extending clamping ribs 35 serve to clamp and secure the position of the ink cartridges 10, 13 within the associated positioning sleeves 25, 26. These clamping ribs 35 also compensate for smaller tolerances in the width of the ink cartridges used. The ink cartridges 10 and 13 are thus between the clamping ribs 35 on the one hand and the respective. Stops 27, 28 on the other hand, in exact association with the Tintenauslaßöffαung or to the capillary (wick 20) of the ink tank 11th

With the apparatus of the invention, ink cartridges having an integral printhead can also be refilled through nozzles associated with the printhead that are in fluid communication directly with the ink storage element (s) within the ink cartridge. In this case, the mentioned nozzles to freiener free end face of the capillary 20 on. The nozzles themselves act as capillary channels.

The ink tank 11 may preferably be made of transparent material, in particular of transparent plastic. In this case, it can be relatively easily determined by the user whether the ink tank 11 is still filled with ink and, if so, what color the ink has. It should also be noted that the ink tank 11 consists of two parts, namely the upper housing part 22 and the bottom 21. These two parts are welded together at the edge before filling.

FIG. 8 shows a modified embodiment with respect to the previously described figures. The opening 18, via which the ink storage element of an ink pad to be filled can be brought into fluid communication with the ink in the container 11 in the manner described above, is represented by a cover, here Screw cap 36 lockable. The screw cap 36 has circumferentially rotary latch elements 39, which engage under the formation of a bayonet closure container side groove elements 40. The rotary latch members 39 are formed relative to the lid center axis diametrically on the outer circumference of the lid 36, within peripheral recesses 41. The complementary groove elements 40 are formed within a formed on the top of the container 11 cup-shaped recess 42 for the lid 36, specifically Within itself in the cup-shaped recess 42 radially extending projections 43. After filling the container 11 through the opening 29 through the lid 36 is inserted into the recess 42, in such a way that the b ehälters ei term projections 43 in the recesses 41st immerse in the lid 36. Subsequently, the lid 36 is rotated in Uhrzeigetsirm so that the rotary latch members 39 engage in the grooves 40 and hold the lid 36 in the closed position.

In this way, the opening 18 is closed, as well as the filling and B aeration opening 29, which is located at the bottom of the recess 42.

According to FIG. 9, sealing elements 37, 38 are arranged on the underside of the lid 36, which consist of soft-elastic, in particular elastomeric material. These sealing elements 37, 38 are associated with the opening 18 and the opening 29 on the one hand. Concretely, the above-mentioned sealing elements comprise the container opening 18 and the vent opening 29 in each case annularly surrounding sealing lips. At least these Dicintlippen consist of the aforementioned soft elastic material.

Opposite the sealing element 38, relative to the center axis of the central sealing element 37, there is still an element 44 corresponding to the sealing element 38, which, however, merely serves as a support element, so that the cover does not assume an imbalance within the recess 42 in the closing direction. The support element, which in the illustrated embodiment is designed in exactly the same way as the sealing element Ment 38, keeps the lid 36 in the closing direction horizontally within the recess 42 so that the sealing element 38 and the Dichtelemeflt 38 defining annular sealing lip in the closed position of the cover 36, the ventilation opening 29 surrounds fluid-tight, ie without tilting relative to the ventilation opening 29. Das Support member 44 may of course be designed differently, for example, as a wart-like projection od. Like. It has only support and no sealing function.

The illustrations in FIGS. 8 and 9 clearly show that the center axis of the container opening 18 is aligned with the center axis of the lid 36 in the closed position thereof, so that upon rotation of the lid 36 out of the closed position, i. in the direction of the arrow 45, first the ventilation opening 29 is opened, before then the lid on further rotation in this direction is completely eαtfernbar or removable. In this way, it is reliably prevented that ink 29 accidentally splashed out so far through the ventilation opening that the user soiled or dirty, the base on which the container 11 is dirty. The lid retains ink that might accidentally squirt out through the opening 29. In any event, ink accidentally leaking through the aperture 29 will remain within the aperture 42 at the top of the container 11.

The Aus fühmngs form according to Figures 8 and 9 is absolutely functional in handling.

As shown in FIG. 8, a protruding tab 46 is arranged on the upper side of the lid as a handle for rotating the lid in the closed or open position or formed directly.

Figures 10 and 11 show a further alternative embodiment of the article according to the invention. Also in these illustrations, the same reference numerals are used for the same objects as in the illustrations of FIGS. 1 to 9. An apparatus 11 for refilling an ink cartridge 1 for an ink jet printer with a printhead comprising nozzles brings the nozzles of the printhead into fluid communication directly with an ink storage element of absorbent material disposed within the ink cartridge. This ink storage element is not shown in detail since it is a per se known device. The same applies to the integrated print head with nozzles in the ink cartridge 1. The device 11 comprises a container filled with ink 19 (see FIG. 10) with a pressure equalization or ventilation opening on the one hand and a further opening. nuiig, through which a capillary element, which can be fluid-connected with the ink, extends in the form of a wick, to which the ink cartridge 1 or its ink storage element can be docked fluidly, that is to say under the provision of a capillary fluid connection.

The ventilation opening 9 formed in the ink container 11 is designed in a manner known per se so that it is opened only when docking the ink cartridge 1 as shown in FIG. For this purpose, the vent opening is associated with a valve 8, which is only moved during docking of the ink cartridge 1 by this via a valve stem 12 in the opening position (see Fig. 11).

The ink tank 11 further has a separate ink outlet, which is formed in the bottom of the container 11 and opens into a bottom-side connecting channel to the capillary. This ink outlet is preferably also apparent only when docking the ink cartridge. For this purpose, a second valve operable with the first valve actuated via the valve tappet 12 is also associated with the ink outlet.

The ink tank 11 has a trough-like recess 24 with a bottom. 23 ao. det top of the ink tank 11. The top of the bottom 23 of the trough-like recess 24 defines a positioning surface for the ink cartridge 1 and an integrated print head thereof. The well-like depression 24 is designed so that within the same the ink cartridge 1 and a print head thereof can be accurately positioned and held with respect to the capillary, which ensure the transport of the ink from the ink tank 11 to the cartridge 1. The outline of the trough-like recess 24 corresponds for example to the outline of an associated print head or corresponding formations on the ink cartridge 1. In addition, 11 corresponding (not shown) positioning and identification elements on the ink cartridge 1 and on. Inkb ehälter - as described above - be provided. At. the Aαdockseite, namely at the top of the ink tank 11 projections, projections may be provided which trigger when docking the ink cartridge 1 latching or clicking and when removing the ink cartridge 1 from the ink tank 11 again correspondingly solvable. When inserting or clicking or latching into the recess 24, 23, the ink cartridge 1 relative to the Tiαtenauslaß / capillary can be precisely positioned and hold. All of the features disclosed in the application documents are claimed to be significant as they are new, individually or in combination with the state of the art.

C o m p a n c e m e n t i o n s

1 ink cartridge

2 Forming on the ink cartridge

5 ink outlet

6 valve

8 valve

9 Pressure equalization or ventilation opening

10 ink cartridges

11 ink tank

12 valve tappets

13 ink cartridge

14 Sealants

16 ink outlet opening

18 ink outlet opening

19 ink

20 connecting element or wick

21 floor

22 housing upper part

23 bottom of a trough-shaped depression

24 trough-shaped depression

25 groove-shaped receiving opening

26 groove-shaped receiving opening

27 Forming on the ink cartridge

27 ', 27 "I dentification elernent

28 stop

29 Ventilation or pressure equalization opening

30 cage

31 formation

32 vertical webs

33 Grip bottle

34 ribs

35 clamping rib 36 lids

37 sealing element

38 sealing element

39 Bayonet catch - rotary latch element 40 Bayonet catch - groove element

41 deepening

42 pot-shaped recess

43 lead

44 support element 45 arrow

46 tab

47 sealing elements

48 free edge of the receiving groove 25 50 intermediate wall 51 pressure chamber

52 openable or closable connection in 50th

53 divided ink space

Claims

"Method and apparatus for refilling an ink cartridge for an ink jet printer" Patentans test

A process for refilling an ink cartridge (10 or 13) for an ink jet printer, comprising. Nozzle comprising printhead or with an ink supply to the Tintensttahlkopfes coupled ink outlet, either the nozzles of the printhead directly or in an ink supply to the ink supply of an ink jet head Tintenauslaßöffnung this, in particular via a wick and / or a valve or a direct fluid connection, with an ink storage element disposed within the ink cartridge and comprising, for example, an absorbent material or a negative pressure generating mechanism, is fluidly connectable to an ink tank (11) having an air vent (29) and an ink reservoir filled with ink

Ink outlet opening (18) through which a Vetbindungselement (20) fuidverbindbares with the ink (19) extends and to which the ink cartridge (10 or 13) or its ink storage element can be docked to produce a capillary fluid connection, characterized in that the ink flow from the ink container (11) into the cartridge to be filled (10 or 13) is carried out supported by overpressure.

2. A method for refilling an ink cartridge (10 bzw.13) according to claim I ₅ characterized gekennz eichnet that the Tintenauslaßöffnung (18) of the ink container (11) during the filling process at least as high as or higher than the intended for filling Tintenauslaßöffnung (16) the ink cartridge (10 bzw.13) can be arranged.

3. A method for re filling an ink cartridge according to claim 2, characterized in that the ink tank (11) is placed on the cartridge to be filled (10 or 13) during the filling process in such a way that it lies above the cartridge outline.

4. A method for refilling an ink cartridge according to claim 1, characterized eichne t that the ink container-Innenrautn (11) is provided with mounting parts and / or deposits, on the attached to the Befüllvorgafig cartridge (10 bzw.13) by

Shaking of ink tank and cartridge an increase in pressure of the ink in the ink tank is achievable.

5. A device for carrying out the method according to claim 1, characterized in that the wall or wall parts (21, 22) of the ink container (11) defined in a compressible elastic pressure to apply pressure to the ink filling are formed.

6. Apparatus for carrying out the method according to claim 1, characterized eichnet that in or on the ink tank (11) a mechanical or electrical pressure generator is attached or attachable, via which the pressure in the ink container interior is influenced.

7. Apparatus for carrying out the method according to claim 1, characterized in that the ink container interior is subdivided by an intermediate wall (50) such that in a divided pressure chamber (51) there is an increased pressure, which after placing the cartridge (10 or .13) can be brought to act on the ink in the divided ink space to accelerate the filling process during the filling process via an open and scannable connection (52).

8. Apparatus for carrying out the method according to claim 1, characterized in that the Tiαtenbehälter-Inneαraum is subdivided by an intermediate wall formed as a membrane such that over the divided by the membrane pressure chamber after Placing the cartridge (10 bzw.13) to the filling process, an increased pressure on the ink in the ink chamber (53) is exercisable.

9. A device for carrying out the method according to claim I ₅ dadur ch gek enn z eich net, that the ink container interior is divided by an intermediate wall or in an insert element is housed and that when placing the cartridge to be filled in the divided space or on the insert element a pressure-increasing foaming can be brought about.

10. An apparatus for carrying out the method according to any one of claims 1 to 3, dad ur ch et ce et al et et, the ink container (11) provided with a heater or is connectable to a heating element, with the / by heating the ink during filling a pressure increase can be achieved.

11. Apparatus for carrying out the method according to one of claims 1 to 3, characterized in that a negative pressure can be generated in the ink cartridge (10 or 13) to be filled.

12. Device for carrying out the method according to one of the preceding method or device claims, since dur ch ge ke nnz egg chn et that the docking points (16 bzw.20) on cartridge (10 or 13) or ink tank (11) pressure and liquid tightly sealed.

13. An apparatus according to any one of the preceding claims, characterized by the fact that at least one identification and / or positioning element is used for the expiration of the re-filling operation of the ink outlet opening (18) of the ink container (11)

(24, 25, 26) for identifying and / or for exact positioning of at least one refillable ink cartridge (10 bzw.13) is assigned. A device according to claim 13, characterized in that a plurality of identification and / or positioning elements (24, 25, 26) are provided for different ink cartridges (10, 13 respectively).

15. The apparatus of claim 14, dadur ch in that the Identifϊzierungs- or positioning element (24, 25, 26) of the Tiαtenbehälters (11) is executed in its contour with projections on the nachzufüllenden Tintenpatroαe (10 bzw.13) for matching meshing ,

16. The apparatus according to claim 15, characterized gek ennzeichnet that the identification elements (21 ', 27 ") on the ink container or the projections afl of the cartridge positive or negative x, y, z or have any other outline shape.

17. Device according to one of the preceding claims, characterized in that the identifϊzierungs- or positioning elements at least one watmenartige

A depression (24), through the bottom of which the ink outlet opening extends, and at least one groove-shaped receiving opening (25) in the upper side of the ink container (11).

18. Device according to one of the preceding claims, characterized eichnet that the trough-like depressions (24) different, with corresponding

Formations (2, 27) on the ink cartridge (10 bzw.13) have corresponding bottom and / or side surfaces.

19. Device according to one of the preceding claims, characterized in that the identification or positioning elements (25, 26) or the trough-like depressions (24) sealing elements (47) for fluid and pressure-tight sealing between inserted ink cartridge (10 bzw. 13) and ink tank (11) associated sinά.

20. Device according to one of the preceding claims, characterized in that in the region of the identification or positioning elements (25, 26) or the trough-like recesses (24) Ra.steLem.eate (clamping ribs 35) for secure docking of the ink cartridge (10 or13) are provided at the Befüllvorgaflg.

21. Device according to one of the preceding claims, characterized dadur ch in that at the top of the ink container (11) at least one nutetifötmige receiving opening (25, 26) for a Tintenopatrone (10 bzw.13) is formed within the det ink cartridge (10 bzw. .13) so placeable, in particular clamping

(Clamping ribs 35) is held that either the nozzles in the integrated printhead of the cartridge or alternatively the ink outlet opening (16) of the cartridge (10 bzw.13) come into contact with the ink outlet opening of the ink container (11) to form a fluid connection comes.

22. The apparatus according to claim 21, characterized in that the at least one receiving groove (25, 26) has a Anformung (27) or a stop (28) for positioning the wiederzufefüllenden ink cartridge (13 bzw.10) in Nutlängsrichtung.

23. The apparatus of claim 21 or 22, characterized in that at the top of the ink container (11) at least two, in particular cross-extending grooves (25, 26) are formed as positioning elements for ink cartridges of different widths (13 bzw.10).

24. Device according to one of the preceding claims, characterized in that an Atiforrmmg (27) at an end corner, in particular at the corner between an integrated printhead and the immediately adjacent end face of the ink cartridge (1) is provided and the ink container ( 11) on its docking side, namely upper side, one of the cartridge-side Anformung (27) complementary shape (31) into which the cartridge-side Anformung (27) when docking, in particular under latching as click or click, in and plugged in removal of the cartridge (10, 13) from the ink container (11) or its Tintenauslaßöffnung / capillary element is detachable therefrom.

25. Device according to claim 24, characterized in that the formation (31) is assigned at least one stop rib with clamping surface extending obliquely into the formation (31), so that the ink jet Cartridge (1) is positioned and held substantially only by the Verklemtnung their Aafotmung (27) within the associated formation (31) in the ink container (11).

26. Device according to one of the preceding claims, characterized in that the capillary element in the manner of a wick (20) is formed.

27. Device according to one of the preceding claims, characterized in that the wick formed as a capillary element (20) of the ink container (11) either with the nozzles formed in the print head of the ink cartridge, odet with a in the Tintenauslaßöffαuαg (16) of the ink cartridge (10). arranged wick is brought into contact, wherein in the latter case, the wick (20) of the ink container (11) made of softer or more yielding material than the wick of the

Ink cartridge (10 or 13), so that the wick of the ink cartridge (10 or 13) by the contact with the wick (20) of the ink container (11) in the filling position remains substantially undeformed.

28. Device according to one of the preceding claims, characterized gekennzei chne t that the wick (20) of the ink container (11) through the bottom (23) of the trough-like positioning recess (24) at the top of the ink container (11) extends therethrough ,

29. Device according to one of the preceding claims, characterized in that at the top of the ink container (11) is provided a venting or pressure equalization opening (29), which is also provided as Tinteneinfüllöffnung.

30. Device according to one of the preceding claims, characterized in that the Tinrenbehälter (11) has a footprint which is dimensioned so that even when over the positioning or identification elements successful coupling and thereby over the peripheral edge of the ink tank (11 ) extending away

Tifltenpatroαe (10 bzw.13) a sufficient stability is guaranteed.

31. Device according to one of the preceding claims, characterized in that the wick (20) of the ink container (11) extends to the bottom thereof and within a fluid-permeable, preferably also to the bottom (21) of the ink container (11) out extending cage (30) is arranged.

32. Device according to one of the preceding claims, characterized in that the cage (30) for the wick (20) at least three uniformly distributed over the circumference arranged, in particular integrally with the ink container (11) or its upper part (22) connected vertical webs (32).

33. Device according to one of the preceding claims, characterized in t that the bottom (21) of the ink tank (11) to the bottom end of the wick (20) drops out.

34. Device according to one of the preceding claims, characterized in that the wick (20) of the ink container (11) and the Tintenfüll- or pressure equalization opening (29) by a peelable adhesive strip (14) are sealable.

35. Device according to one of the preceding claims, characterized in that the adhesive strip (14) within one, in particular the wider receiving groove (25) for an ink cartridge (13) can be placed such that it at the Tiαtenfüll- or pressure equalization opening (29 ) facing side beyond the free edge (32) of the receiving groove (25) to form a gripping tab (33) protrudes.

36. Device according to one of the preceding claims, characterized eichnet that the Tintenb ehälter (11) is at least partially made of transparent material, in particular plastic.

37. Device according to one of the preceding claims, characterized in that 25

the Tintenb ehälter (11) has a truncated cone, pyramiden.stum.pf-, lenticular or spherical dome-shaped basic shape (22) with a circular or rectangular bottom (21).

38. Device according to one of the preceding claims, characterized by an ink-filled container (11) having an opening through which the ink storage element (17) via the nozzles of the print head or the ink outlet opening (16) of the ink cartridge (10 or 10). 13) is directly brought into contact.

39. Device according to one of the preceding claims, characterized in that the opening of the container (11) is formed at its upper side and a cross section corresponding to the outer contour of the nozzles comprising the printhead or the Tintenauslaßöffnung (16) of the ink cartridge (10 bzw.13 ) having.

40. Device according to one of the preceding claims, characterized in that the container opening is bounded by a sealing strip, in particular made of elastomer or rubber, which rests in docked ink cartridge fhiiddicht at the print head or the Tintenauslaßöffnung.

41. Device according to one of the preceding claims, characterized in that a separate ventilation or pressure equalization opening in the ink container (11) is provided, which is preferably arranged within a container recess and before the first use also by a film strip, in particular by the Opening for docking the ink cartridge (10 bzw.13) closing film strip is sealed.

42. Device according to one of the preceding claims, characterized in that the Aufnahmeαuten for the ink cartridge at the top of the ink container are formed so that the nozzles of the print head or the ink outlet of the TiGo while docking the same extend to the bottom of the ink container.

43. Device according to one of the preceding claims, characterized in that the opening (18) through which the ink storage element (17) can be brought into fluid communication with the ink in the container (11), by a lid, in particular screw cap (36) is closable ,

44. Device according to one of the preceding claims, characterized in that the lid (36) at the same time, as closure of a surface within the projection of the cover ventilation or pressure equalization opening (29) is used.

45. Device according to one of the preceding claims, characterized in that on the underside or on the container (11) facing side of the lid (36) sealing elements (37, 38) are arranged, the Tintenauslaßöffnung (18) on the one hand and the Ventilation opening (29) are assigned on the other hand, such that they close in the closed position of the lid (36), these openings (18, 29) fluid-tight.

46. Device according to one of the preceding claims, characterized in that the sealing elements (37, 38) formed in the closed position of the lid (36) through the container opening (18) and ventilation opening (29) each annularly surrounding sealing lips made of relatively soft elastic, in particular elastomeric material are.

47. Device according to one of the preceding claims, characterized in that in the closed position of the cover (36) the center axis of the opening (18) via which the ink storage element with the ink in the container (11) can be brought into fluid communication with the center axis of the Cover (36) is aligned so that upon rotation of the lid (36) from the closed position, first the vent opening (29) is opened before the lid (36) is completely removable.

48. Device according to one of the preceding claims, as characterized by gekennz that the cover (36) by means of complementary bayonet closure elements (39, 40) on

Container (11) is lockable.

49. Device according to one of the preceding claims, characterized in that the cover (36) within a complementary top wrinkled recess (42) in the container (11) can be placed.