DE102012005981A1 - Fluid receptacle, in particular ink cartridge, for inkjet printers - Google Patents

Abstract

A fluid receptacle, in particular ink cartridge (10) for inkjet printers or adapters for receiving a fluid receptacle in a fluid delivery device, the fluid receptacle or adapter comprising: - a light guide (36), - a light entrance surface (37) associated with a first outer surface of the ink cartridge (10), A light exit surface (38) associated with a second outer surface of the ink cartridge (10), the light guide (36) directing light entering the light entry surface (37) to the light exit surface (38) so that it can exit there, the light guide (36 ) is configured such that light emerging from the light exit surface (38) has an offset (V, W) from the light entering the light entry surface (37).

Description

The invention relates to a fluid receptacle or adapter for receiving a fluid receptacle, a method for detecting and / or determining a type of replaceable fluid receptacle or adapter for receiving a fluid receptacle in a fluid delivery device, and a system for detecting and / or determining a type of replaceable one Fluid receiving container, or an adapter for receiving a fluid receiving container, in a fluid dispenser.

Especially with ink cartridges, which are connected via hose lines with a printhead, it must be ensured that these hoses always remain filled with ink. Otherwise, there is a risk of local dehydration and interruption of ink supply. For this reason, it is also important that the level of an ink cartridge is monitored. For this purpose, printers have means which determine what the level of the ink cartridge is, in particular determine whether the ink cartridge is empty or will soon be empty, in order then to prevent further printing. It is indicated that a cartridge exchange is required. The devices of the type mentioned include on the printer side one or more light emitting and light receiving parts, wherein between these two parts of the printer cartridge associated presence detection means, cartridge type detection means or level detection means are placeable. In the prior art according to the DE 10 2007 001 084 A1 For this purpose, the ink cartridge has a fill-level indicator comprising an opaque or alternatively light-reflecting lug, the lug being connected to a float arranged inside the ink cartridge or the housing thereof, such that the lug falls either into or out of the region with decreasing fill level in the printer arranged light barrier is movable. Alternatively, the flag may be arranged on a rotatably mounted float device. If a predetermined level is reached, the light barrier is released, ie the light beam passes unhindered from the light transmitting part through the cartridge to the light receiver part. This triggers a predetermined procedure indicating that cartridge replacement is warranted.

Furthermore, in the prior art, namely from the EP 0 573 274 A2 such as EP 0 626 267 A2 Fill level detection means comprising a reflection prism are known. For this purpose, a light transmitter and a light receiver are arranged on a predetermined side wall. The light of the light emitter may enter the reflection prism and is either absorbed or reflected depending on whether or not a surface of the prism facing the ink chamber is wetted with liquid. The reflected light is then detected by the light receiver.

A similar physical principle also uses the applicant's international application with the publication number WO 2011/035935 A1 , There, an ink-deflectable or ink-deflectable deflection element is described, which has a first and a second light beam deflection surface. The diverting element is part of the top of an extension of the ink receiving space projecting forward beyond the front of the cartridge. A light beam entry surface and a light beam exit surface as well as the inkable or ink deflectable deflection surface are components of an approximately U-shaped deflection element. The light-beam entry surface and the light-beam exit surface are formed on the two legs and the ink-deinkable or ink-deflectable deflection on the arranged between the two legs of the approximately U-shaped deflection element web. In contrast to the solutions described above, in which the light exits from the cartridge wall on which it has also entered, the light goes according to WO 2011/035935 A1 (in the empty state or entwused state) through the cartridge through, wherein the exiting light beam is aligned with the incoming light beam.

In all solutions that work with the principle of light reflection at an interface, it is perceived as disadvantageous that light emitter and light receiver take up comparatively much space. This results in increased expense and cost in the design and manufacture of ink jet printers suitable for the particular ink cartridges. In ink cartridges of the prior art are usually photocells, such as in the DE 10 2007 001 084 A1 , or double reflection prisms or mirrors, as in EP 0 779 156 A1 , used. As a result, the freedom with respect to the installation of the level detection means and the associated Lichtsende- or receiver part, which are often constructed as a structural unit (as optoelectronic components for transmitted light or reflection light barriers) limited. Furthermore, a comparatively large dimensioning of the printer receptacle and thus the entire printer is required. This is particularly disadvantageous if, in addition to fill level detection, one or more light barriers, for example for detecting cartridges, are provided, all of which each require a separate light transmitter or receiver section.

The present invention is therefore based on the object, a fluid receptacle or adapter, a system for detecting and / or determining a type of interchangeable Fluid receiving container or an adapter, and a method for detecting and / or determining a type of replaceable fluid receiving container or an adapter for receiving a fluid receiving container vorzuschschlagen, it should be possible on the one hand the design effort, in particular the space required for a light emitter and a light receiver, to reduce as well as to achieve a greater degree of freedom in the arrangement of one or more sensors that interact with a signal generator.

This object is solved by the appended claims. Modifications and constructional details are described in the subclaims.

In particular, the object is achieved by a fluid receptacle, preferably a liquid receptacle, in particular an ink cartridge for an ink jet printer, comprising a light guide, a light entrance surface associated with a first outer surface of the cartridge, a light exit surface associated with a second outer surface of the cartridge, the light guide entering light entering the light entrance surface the light exit surface deflects, so that it can exit there, wherein the light guide is formed such that light exiting the light exit surface, with respect to the light entering the light entrance surface, an offset.

An essential aspect of the present invention is that light emerging from the light exit surface has an offset with respect to the light entering the light entry surface. Such a design makes it possible to arrange light transmitters and light receivers at clearly separated locations. It is both an immediate juxtaposition on the same wall (such as in the EP 0 626 267 A2 ), as well as an arrangement in which incoming and outgoing beam are aligned (as in the WO 2011/035935 A1 ). In particular, it was recognized that only one (smaller) volume must be provided for the two components by a spatial separation of light receiver and light transmitter in the associated printer. This reduces the space required for the printer-side detector device. Furthermore, by the displacement of the light pipe, hard-to-reach locations of the ink cartridge (of the fluid receiving container) can also be used, for example, for (ink) level detection. For example, it may be sufficient if only the light emitter or only the light receiver are provided in such a difficult-to-access location, and the respective other component at a different location. It is even possible to provide both light receivers and light emitters away from the location of level detection (e.g., the location of a level prism array). Furthermore, it was recognized that the offset of the light entry surface and the light exit surface avoids a risk of false detection resulting from stray light compared to the prior art. In the prior art (as described above), the light emitter and the light receiver or the light entrance surface and the light exit surface are close to each other. As a result, the risk is relatively high that stray light is detected by the light receiver, although in principle (for example due to absorption by the ink) an interruption of the light beam is to be achieved. For example, in the prior art, the receiver could indicate ink depletion even though the cartridge is still full. A filled cartridge might be unusable.

By "offset" is to be understood in particular that the light entrance surface of the light exit surface is not mirror images or that an incoming light beam is not aligned with an outgoing light beam, or, when using a reflection prism, a light transmitter is not in the immediate vicinity of a light receiver. A light entry surface assigned to the first outer surface of the cartridge should in particular be understood to mean a surface in which light which radiates in a direction perpendicular to the first outer surface of the cartridge can strike the light entry surface. The same applies to the second outer surface of the cartridge associated light exit surface. For this is to apply that light from the light receiver, which is guided over a light path to the second outer surface and emitted perpendicularly from this, can reach a sensor arranged in front of the light exit surface. The function of the entrance or exit surface, depending on the arrangement of the transmitter (s) of the sensor (s) can be reversed (in general).

Preferably, the first and second outer surfaces are opposite each other. This is intended to mean, in particular, that the first and second outer surfaces run parallel at least in sections. First and second outer surface should thus not be arranged above the corner, for example.

In a specific embodiment, the first and the second outer surface of the ink cartridge are identical, wherein a distance between the light entry surface and the light exit surface corresponds to at least half the dimension of the larger characteristic parameter of the outer surface. The characterizing parameter is preferably the height of the ink cartridge. Examples of the larger characteristic parameter are the length of a rectangle, the larger ellipse axis of an ellipse (etc.). A minimum distance of 20 mm, preferably 25 mm, more preferably 30 mm, is preferred.

The offset may preferably be at least 25%, more preferably at least 35%, even more preferably at least 50% of a length and / or width and / or depth of the fluid receiving container, in particular the ink cartridge. In absolute terms, the offset may be at least 20 mm, preferably at least 25 mm, more preferably at least 30 mm.

Preferably, a fill level recognition means, in particular a fill level prism, is arranged within a light path of the light guide device. In a first alternative, the light-conducting device can cooperate with the level detection means such that light guided by the light-conducting device is absorbed depending on the state of the fill level detection means (for example, wetting or wetting of reflection surfaces) (and thus can not reach a detector) or reflected (generally: forwarded) is (and thus can reach a detector). The fill level detection means may be a light blocking portion of a body moveable by fluid buoyancy in the fluid receiving container. Preferably, the level detection means is an optical component, e.g. B. a level prism. In a further alternative, however, the light of the light-conducting device can also radiate through a section of the fill-level detection means, but otherwise do not interact with it. In this alternative, the light of the light guide reaches regardless of the level a designated detector. In this alternative, the light needed for the level detection means may be provided via a second light entry surface. This does not have to (necessarily) have an offset to the light exit surface and / or a second light exit surface. In other embodiments, a level detection means may be dispensed with. The light incident on the light entry surface can then be used, for example, to determine a particular type of cartridge (for example, corresponding to the contents of the cartridge "red" or "blue" or the initial charge of the cartridge "large" or "small" charge).

In a specific embodiment, the light-guiding device comprises at least one light guide (synonymous with optical waveguides). Optical waveguides should in particular be understood to mean an (elongate) element which has an input and an output. If light hits the input of the fiber optic cable, it is directed from there via the fiber optic cable to the output. Such optical waveguides are basically known in the prior art. Such optical waveguides are long (flexible or rigid) cylinders, or in the case of planar optical waveguides, rods with, for example, a rectangular cross-section, whose longitudinal extent is significantly longer than their diameter wide (perpendicular to the longitudinal extent). A special type of optical fiber is a fiber optic cable. For the transport of larger amounts of light several fiber optic cables can be bundled. Furthermore, arrangements known to those skilled in the art can be made for coupling in the light. A ratio of longitudinal extension to diameter for the optical waveguide or, for example, at least 3 or at least 5 or at least 10. Such an optical waveguide can be achieved with simple design means an offset of incoming light beam and exiting light beam.

In principle, optical waveguides make it possible to transport the light, even along curved paths, from one place to another.

The optical waveguide preferably extends (at least in sections) at an (average) angle, preferably greater than 60 °, more preferably greater than 85 °, with respect to the light entry surface. By such an arrangement, the optical waveguide allow a relatively large offset, without taking up much space.

In a specific embodiment, the optical waveguide has a quadrangular cross-section. In general, it is conceivable that the optical waveguide has a polygonal cross section. In alternative embodiments, the optical waveguide may have, at least in sections, a (circular) round, elliptical or otherwise shaped cross section.

The optical waveguide may comprise the light entry surface. Alternatively or additionally, the optical waveguide may comprise the light exit surface. Light entry surface and / or light exit surface are preferably formed as a flat surface (surfaces). In a specific embodiment, light entry surface and / or light exit surface may be formed parallel to a cartridge wall. In embodiments of this type, the optical waveguide is used in a simple manner to receive the incoming light. This reduces the design effort and thus the cost.

An end of the optical waveguide assigned to the light entry surface may have an entry slanted surface which introduces light impinging on the light entry surface into the optical waveguide. Alternatively or additionally, an end of the optical waveguide assigned to the light exit surface may have an exit slanted surface which guides light guided in the optical waveguide out of the optical waveguide. The entry inclined surface and / or the exit inclined surface may preferably have a reflector. The reflector can, for example, a Reflection layer, such as a metal layer, in particular aluminum layer or silver layer, or a dichroic layer, as used for example in the production of interference mirrors, or a reflector wall (reflector cap). The reflection layer is preferably formed integrally with the optical waveguide. The reflector wall (reflector cap) can be arranged as a separate component (in direct contact) on the optical waveguide.

The optical waveguide preferably extends over at least 20%, more preferably over at least 35%, even more preferably over at least 50% of a side wall (approximately) parallel to the optical waveguide. The parallel side wall is preferably that which comprises the light entry surface or light exit surface or is associated with the light entry surface or light exit surface. The proposed extent of the optical waveguide, a comparatively large offset can be achieved in order to separate the light receiver and the light emitter in the printer spatially. An optical waveguide with the dimensioning proposed here or a fluid receptacle (ink cartridge) with such an optical waveguide is also claimed independently of the formation of an offset.

In preferred embodiments, the optical waveguide has a curved course at least in regions. As a result, on the one hand a light deflection can be realized in a simple manner. On the other hand, the optical waveguide can be guided past further components (for example an air inlet opening).

In a specific embodiment, (at least one) second optical waveguide is provided which preferably extends (substantially) parallel to the first optical waveguide. The second optical waveguide is preferably arranged behind the first optical waveguide. A "parallel" course is to be understood in particular an arrangement of the optical waveguide, in which the light is conducted in the same (substantially the same) direction. The term "behind" should be understood to mean a relative arrangement with respect to a front side, that is to say in particular "in the direction of insertion behind". Alternatively or additionally, at least one third optical waveguide can be provided, which permits (essentially) antiparallel guidance of the light path to the first or second, in particular parallel, optical waveguide. This third optical waveguide is preferably arranged next to the first (or second, parallel) optical waveguide (parallel). It is furthermore preferred that the third optical waveguide is connected to the first optical waveguide or the second, parallel optical waveguide in terms of lighting technology. The term "second" or "third" should in this context merely be a continuation or delimitation of "first" or "second" optical waveguides. There may well be two or more "second" or "third" optical fibers, for example a second, parallel optical fiber and a third, parallel optical fiber. An arrangement of a first with a third optical waveguide (without a second optical waveguide) is also possible. By a second, parallel optical waveguide signal sequences can be realized in a simple manner. If, for example, a light receiver is moved in the direction of the optical waveguide, first the light is deflected by the first optical waveguide and can be fed to a transmitter. Then the light from the second optical fiber is directed to the same or another light receiver. In this connection, it is particularly preferred for the first optical waveguide and the second, parallel optical waveguide to be spaced apart from one another at their end assigned to the outlet, so that a gap is formed between their ends. For the receiver, this is such that first light is passed from the first optical fiber to the receiver. If the transmitter is located adjacent to the gap, it receives no light. If the receiver is assigned to the second, parallel optical waveguide, it in turn receives light. As a result, a decisive signal sequence, for example, for the Patronentyperkennung be realized.

By means of a third optical waveguide, light can again be returned, for example in the direction of the light entry surface (after it has been detected, for example, by a fill level prism). Particularly difficult to access areas of a fluid receiving container, in particular an ink cartridge, can still be provided with such a version with a level detection means. Light from the first optical waveguide can then be conducted to this fill level detection means, pass through the fill level detection means and be directed by the third optical waveguide (quasi) antiparallel in the direction of a detector.

The light exit surface may at least partially overlap with a second light exit surface for light of a second light entry surface, in particular be identical to this. In such an embodiment, light from two different light entry surfaces can be detected with only one detector. This simplifies the construction of an associated printer.

In general, a second light entry surface can be provided, from which preferably light is conducted to a second light exit surface. Alternatively, the light of the second light entry surface can be blocked. By a second light entry surface, light of a second light emitter be used in a simple manner, for example, for cartridge type detection or level detection.

In an alternative embodiment, the first light exit surface is assigned a light-blocking section, so that no light can pass from a surface section lying opposite the first light exit surface to the first light exit surface. As a result, light which radiates from an optionally provided second light transmitter in principle in the direction of the light exit surface can be prevented from passing through. Thereby, the reliability of the detection of the light entering through the first light entry surface is increased.

In a specific embodiment, the first light entry surface is arranged in a corner region. Alternatively or additionally, the light exit surface can be arranged in a middle region (for example in a range of 40% to 60% of the extent of the front side) or a lower region of a side wall of the fluid receiving container. There is plenty of space in the corner area to deflect light. In the middle or lower area this can then be detected in a simple manner.

The abovementioned object is achieved independently by a detector system comprising at least one fluid receptacle, in particular at least one ink cartridge for an inkjet printer or an adapter of the type described above, and at least one light emitter or two light emitters in order to transmit light to the first or second To radiate light entrance surface, and at least one light receiver, in particular two light receivers to receive light of the first and second light exit surface. With regard to the advantages, reference is made to the comments on the fluid receptacle.

The above object is further achieved independently by a system comprising a fluid dispenser, in particular an ink jet printer, and an ink cartridge of the type described above or a system of the type described above.

The abovementioned object is achieved independently by a set of at least two fluid receiving containers, in particular ink cartridges, or adapters, of the type described above, wherein at least two fluid receiving containers, in particular ink cartridges, or adapters, have a different offset.

The above object is further achieved independently by a system for detecting and / or determining a type of replaceable fluid receptacle, or an adapter for receiving a fluid receptacle in a fluid delivery device, in particular a printer, the system comprising the fluid receptacle and the fluid delivery device, wherein the fluid delivery device comprises at least a first and at least one second sensor (light sensor, light receiver) and a signal transmitter (light emitter), wherein the first sensor can receive a signal from the signal transmitter in the non-inserted state of the fluid receiving container, wherein the fluid receptacle or adapter comprises a light guide, wherein when inserting and / or in the inserted state of the fluid receiving container or adapter, the light-guiding device is arranged between the signal transmitter and the at least one first sensor, which blocks the signal for the first sensor kiert and via an optical path (light path) to at least a second sensor, or a cooperating with the second sensor level detection means is redirected.

The light path (optical path) preferably comprises at least one light guide (optical waveguide).

In a specific embodiment, the optical path may include (additionally) at least one level detection means for indicating a (particular) fluid fill.

The first signal transmitter (transmitter) can be arranged with the first sensor (receiver) in the form of a fork light barrier.

The above object is achieved independently by a method for detecting (presence) and / or determining a type of replaceable fluid container, or an adapter for receiving a fluid container, in a fluid dispenser, in particular a printer, wherein the fluid dispenser at least a first and at least a second sensor (light sensor, light receiver) and a signal transmitter (light emitter) comprises, wherein the first sensor with a non-inserted fluid receptacle receives a signal (light signal) and the fluid receptacle or adapter comprises a light guide, wherein the signal (light signal) of the signal transmitter (transmitter ) is interrupted for the at least one first sensor during insertion and / or in the inserted state of the fluid receptacle or adapter by the light guide and the signal simultaneously or in chronological order via an optical path (light path) to the mi At least a second sensor, or a cooperating with the second sensor level detection means is redirected.

The signal in the light path of the light-guiding device can be guided (at least partially) via an optical waveguide (optical waveguide).

The signal in the light path of the light-guiding device can be guided (additionally) at least via a fill-level detection means for indicating a (specific) fluid fill quantity.

• – Bereitstellen von Licht,
• – Einstrahlen des Lichts auf eine einer ersten Außenfläche des Fluidaufnahmebehälters, insbesondere der Tintenpatrone zugeordnete Lichteintrittsfläche (37),
• – Leiten des eingestrahlten Lichts zu einer Lichtaustrittsfläche (38), die einer zweiten Außenfläche des Fluidaufnahmebehälters, insbesondere der Tintenpatrone, zugeordnet ist, wobei das Licht, das aus der Lichtaustrittsfläche (38) austritt, gegenüber dem Licht, das in die Lichteintrittsfläche eintritt, einen Versatz (V) aufweist,
• – Empfangen des Lichts.

The above object is further achieved independently by a method for detecting (presence) and / or. Determining a type of replaceable fluid receptacle, or an adapter for receiving a fluid receptacle, and / or for determining a filling level of a fluid receptacle, comprising the steps of:

• Providing light,
• Irradiating the light onto a light entry surface associated with a first outer surface of the fluid receiving container, in particular of the ink cartridge (US Pat. 37 )
• - directing the incident light to a light exit surface ( 38 ), which is associated with a second outer surface of the fluid receiving container, in particular of the ink cartridge, wherein the light emerging from the light exit surface ( 38 ), opposite to the light entering the light entry surface, has an offset (V),
• - receiving the light.

Finally, the above object is also achieved by the use of a fluid containment vessel having the above characteristics for detecting the cartridge type and / or for level detection, particularly in an ink jet printer.

Further embodiments emerge from the subclaims.

Hereinafter, preferred embodiments of an ink cartridge according to the invention will be explained with reference to the following drawings.

Hereby show:

1 a first embodiment of an ink cartridge for an inkjet printer in a side view;

2 the embodiment according to 1 in a view from the front;

3 a section of the embodiment according to 1 in an oblique view;

4 a section of the embodiment according to 1 in a further perspective view;

5 a section of the embodiment according to 1 in a side view;

6 a section of the embodiment according to 1 in a view from the front;

7 a second embodiment of the ink cartridge for an inkjet printer in an oblique view;

8th a third embodiment of an ink cartridge for an inkjet printer in a side view;

9 the embodiment of the ink cartridge according to 8th in a view from the front;

10 the embodiment according to 8th in an oblique view;

11 a section of the embodiment of the ink cartridge according to 8th in a view from the front;

12 a section of the embodiment according to 8th in a sectional side view;

13 alternative embodiments for the formation and arrangement of one or more optical waveguides;

14 Characteristics for interrupting a signal when inserting the ink cartridge into an ink jet printer;

15 Section of an embodiment of the ink cartridge;

15A a schematic representation of an ink cartridge and sensors;

15B the ink cartridge according to 15A with differently arranged sensors;

16A a schematic representation of an ink cartridge with sensors;

16B the ink cartridge according to 16A with a different arrangement of the sensors;

17A a schematic representation of an ink cartridge with sensors;

17B the ink cartridge according to 17A with differently arranged sensors;

18A a schematic representation of an ink cartridge with sensors;

18B the ink cartridge according to 18A with a different arrangement of the sensors;

19A a schematic representation of an ink cartridge with sensors;

19B the ink cartridge according to 19A with a different arrangement of the sensors;

20A a schematic front view of a ink cartridge according to the prior art with a light receiver and a light emitter;

20B an embodiment of an ink cartridge according to the invention with a light receiver and a light emitter;

20C a further embodiment of an ink cartridge according to the invention with light emitter and light receiver.

21 a deflecting element in a schematic view;

22 an optical fiber in an oblique view.

In the following description, the same reference numerals are used for the same and like elements.

1 shows a first embodiment of an ink cartridge 10 for an inkjet printer in a side view. In 2 is the ink cartridge off 1 shown from the front. The ink cartridge 10 is configured as a so-called "front loader" cartridge and has a front wall 11 , a back wall 12 , an upper wall 13 , a lower wall 14 , a first sidewall 15 and a second side wall 16 on. The ink cartridge is designed to be in the direction of the arrow 17 into an ink jet printer (not shown).

In a lower section 18 the front wall 11 is an ink supply port 19 intended. At (or adjacent to) an upper end 20 the back wall 12 is an opening 21 provided with a lid 22 (rubber) is closed. About the opening 21 The ink cartridge can be refilled. The opening 21 can also serve as an air inlet opening. Alternatively, the air inlet opening may be provided in the upper area of the cartridge (for example in the upper wall).

Positioning or sliding elements 23 to 28 on the upper wall 13 , the lower wall 14 and the back wall 12 facilitate handling and insertion of the ink cartridge into the corresponding ink jet printer.

In the middle section 29 between the lower section 18 and an upper section 30 the front wall 11 is in the 1 and 2 (hint) an approximately U-shaped deflection 31 (see with regard to the U-shape, 2 ) to recognize. The U-shaped deflecting element 31 is with more details in the 3 . 4 and 6 shown.

The deflecting element 31 is in the embodiment according to the 1 to 6 basically, as already in the WO 2011/035935 A1 , which originates from the Applicant described trained. In particular, in this regard, the disclosure of the WO 2011/035935 A1 by reference (in particular to 2 and 3 , as well as related description) be part of the present application.

An upper (first) light beam 32 (please refer 3 ) can be perpendicular to an upper end 33 an optical fiber 34 meet and is characterized by internal reflection on the slanted surface 65 downwards in the direction of the deflecting element 31 reflected (see 3 and 4 ). The course of the upper light beam 32 is ideally drawn after the reflection on the beveled surface. As is customary with optical waveguides, a (multiple) reflection on walls of the optical waveguide 34 respectively. For the most complete reflection possible on the inclined surface 65 or to possibly from the inclined surface 65 also to reflect transmitted light in the light guide, in addition, at least on the inclined surface, a mirror layer 62 (please refer 7 ), or a cap 35 be executed on the side facing the light guide mirrored. In order to make the operation of the light guide particularly high, or its installation particularly simple, and the entire light guide (metallic or dichroic) with the exception of the entrance and exit surface can be mirrored.

A preferred embodiment of the optical waveguide 34 is in 22 shown. The optical fiber 34 according to 22 has a curved course and a rectangular cross-section.

The optical fiber 34 is part of a light guide 36 , the light from an upper light transmitter (in the 3 and 4 not shown, but at the level of the upper end 33 of the optical fiber 34 can be arranged) down to a lower light receiver, which is at the height of the deflecting element 31 can be arranged (also not in the 3 and 4 shown).

In particular in 5 It can be seen that an upper (first) light entry surface 37 and a light exit surface 38 (see also 6 ) have an offset V against each other. The offset V extends over the entire upper portion 30 the front wall 11 , ie (about) over the upper half of the front wall 11 ,

The light entry surface 37 is adapted to receive a light beam from a light emitter perpendicular to the first side wall 15 is directed through the optical fiber 34 or the light-conducting device 36 towards the second side wall 16 to direct where it is perpendicular towards a lower light receiver 51 can escape.

Kick the top 33 of the optical fiber 34 into a light barrier (light fork), an upper light receiver will detect no or at least less light from the upper light transmitter, since (at least preferably) all of the light from the light transmitter is directed down through the optical fiber 34 is directed. The upper light receiver can then be adjusted accordingly so that it detects an interruption of the light beam, for example when inserting the cartridge and in the inserted state and thus indicates a state "cartridge inserted" (if desired). This can be done, for example, by setting a load resistance or the like. With regard to the arrangement and design of (in principle known in the art) light forks is exemplified in the DE 20 2008 017 958 U1 directed. However, the arrangement proposed in this prior art is by no means mandatory for the present invention. Basically, however, with respect to the design and arrangement of the detectors (light forks or light emitter and / or receiver) in full on the DE 20 2008 017 958 U1 Referenced.

As in 4 to see is the optical fiber 34 at a front end 39 the upper wall 13 arranged. The cap 35 is integral with one from the top wall 13 upward guide rib 40 educated. Alternatively, guide rib 40 and cap 35 be designed as separate components. An upper one 41 and lower 42 Spacer (see 4 ) serve in particular the support and fixation of the optical waveguide. Similarly, the leadership rib takes over 40 as well as the cap 35 a supporting function of the optical fiber. Due to the integral formation of support rib 40 and cap 35 Three different functions are taken into account with only one component (positioning function for the ink cartridge, support function for the ink cartridge and at the same time the optical waveguide, reflection function of an inside of the cap 35 ). As a result, the design effort can be reduced. Furthermore, the light guide also (only) by clamping action between the guide rib 40 or cap 35 and prism 31 being held.

The optical fiber 34 and the spacers 41 . 42 are in an empty (not filled with ink) space 43 arranged and located (see 5 ) between the front wall 11 and an ink receiving space 44 , The space 43 with the optical fiber 34 and the spacers 41 . 42 is from a cover 45 covered. Overall, there is a structure that reliably allows a desired light pipe. The risk of contamination of the optical fiber 34 or the light guide 36 is reduced. Overall, in a structurally simple and reliable way, a light pipe from the light entrance surface 37 to the light exit surface 38 guaranteed. At a lower end 46 of the optical fiber 34 there is an inclined surface (see 6 ), which may be mirrored for additional support of the internal reflection at an exit bevel arranged here. From the exit bevel becomes the upper light beam 32 (In this case, in an (approximately) 90 ° angle to the exit surface of the light guide) in the direction of the deflection element 31 and passed through it.

Structure and function of the deflection element 31 is described in more detail below (based on 6 and 21 ). The deflecting element 31 is formed and provided to a lower (second) light beam 48 from a lower (second) entrance surface 49 to the light exit surface 38 to lead. The lower entrance area 49 defines a light beam deflection surface. The light exit surface 38 lies the lower (second) entrance surface 49 across from. A ray of light passes through the light exit surface 38 out when within the light beam deflecting element 31 a total reflection takes place (ie in the unwetted state of the arranged in the ink chamber surface 53 the deflecting element 31 ). In 6 is the light transmitter 50 and the light receiver 51 to see. In 21 is still an extension 76 of the deflecting element 31 is assigned to recognize. 21 corresponds (with changed reference numerals) the 3 from the publication WO 2011/035935 A1 (with regard to the deflecting element 31 especially on this 3 of the WO 2011/035935 A1 referenced).

Alternatively, the light beam of the upper light transmitter can also be introduced directly (without a further inclined surface) into a correspondingly adapted fill level detection means. In 9 a possible beam path is shown in dashed lines. The (in 9 unrecognizable) optical fiber has a lower end surface which is (approximately) aligned perpendicular to the beam path. As a result, the light beam is introduced directly into a correspondingly adapted (asymmetrical) level detection means. In alternative embodiments, a combination (not shown) of a partially symmetrical in the insertion direction, partly asymmetric designed fill level detection means are realized with a correspondingly wider-shaped optical fiber, or a corresponding arrangement of individual symmetrical or asymmetrically designed detection means with individual appropriately adapted light guides.

The lower light entry surface 49 and the light exit surface 38 (which both define a light deflection surface) act with one within the cartridge 10 depending on the level with ink 52 or ink 52 Removable (horizontal) deflection surface 53 (the deflection surface 53 is in 6 drawn dashed, as they actually only behind the front wall 11 is arranged) together. The lower light entry surface 49 , the light exit surface 38 (in 6 not visible) and the deflection surface 53 are thus components of an integral component, namely the (approximately) U-shaped deflecting element 31 , Corresponding 6 are the light entry surface 49 and the light exit surface 38 on thighs 54 . 55 the deflecting element 31 and those with ink 52 or ink 52 Removable deflecting surface 53 at one between the two thighs 54 . 55 of the (approximately) U-shaped deflecting element 31 arranged bridge 56 educated.

The two thighs 54 . 55 the deflecting element 31 include an angle of 90 °, in particular (about) 35 ° to 50 °, preferably (about) 45 °. This angle depends on the material of the deflecting element 31 and also the thickness and the length of the legs 54 . 55 from. As 6 recognize, define the two thighs 54 . 55 the deflecting element 31 between the lower light entry surface 49 and the light exit surface 38 in each case at least one, specifically two further (inner) Lichtumlenkflächen 57 . 58 respectively. 59 . 60 ,

Free ends of both thighs 54 . 55 each comprise a deflection prism with outwardly directed tip. The respective tip or the respective deflection prism respectively define the light transmitter 50 as well as the light receiver 51 facing inclined surfaces, namely the lower light entry surface 49 (Deflection) and the light exit surface 38 (Deflection). The deflection surfaces 57 . 60 form inner light beam deflection surfaces. The light entry surface 49 and the deflection surface 57 or the deflection surface 60 and the light exit surface 38 the end-side deflection prisms enclose an angle of (approximately) 35 ° to 60 °, in particular (approximately) 45 °. This angle can, among other things, the material of the deflection 31 and thus depend on the refractive index of the same.

The information provided is intended to refer in particular to a polypropylene prism (other materials such as polycarbonate or PMMA materials are possible).

In the illustrated embodiment, those are the light emitter 50 and the light receiver 51 facing surfaces 49 . 38 in the cross section of the respectively associated deflection prisms dimensioned shorter than the respective opposite deflection surfaces 57 . 60 , This dimensioning also depends on the material of the deflecting element 31 and thus from the corresponding refractive index. It must be ensured that the light beam (safe) on the respective inner deflection surfaces 57 . 60 incident. The thigh 54 . 55 the deflecting element 31 are (preferably) an integral part of an ink receiving space.

The thigh 54 . 55 and the bridge between them 56 the deflecting element 31 are dimensioned so that the beam path in total reflection, ie with entnetzter deflection 53 remains within the two aforementioned legs and the aforementioned web section. The entry and exit takes place only at the entrance surface 49 or light exit surface 38 , Accordingly, the beam path can not be disturbed by external influences.

The inclination of the light beam deflection surfaces ( 49 . 53 . 57 to 60 and 38 ) and the distance between them depends inter alia on the ink on the one hand and on the material from which the deflecting element 31 is trained, on the other hand from. So z. B. when using the material polypropylene are assumed by the following conditions:

refractive indices

• Air: n _Air ≈ 1.00
• Polypropylene: n _pp ≈ 1.5
• Ink: n _Ink ≈ 1.40

This results in the following critical critical angle between the aforementioned light deflection surfaces:
PP / air: Θ _c = asin (n _air / n _pp ) ≈ 42 °
PP / ink: Θ _c = asin (n _ink / n _pp ) ≈ 69 °

In this constellation, it is preferable to choose the following refraction angles at the individual boundary surfaces (in 6 counted from left to right, based on the light beam 48 ; see. WO 2011/035935 A1 , especially 3 ):
A = 30 ° (entrance angle)
1 = 19.5 °
2 = 45 °
3 = 59 °
4 = 51 °
3 '= 59 °
2 '= 45 °
1 '= 19.5 °
A '= 30 ° (exit angle)

At these angles, a reliable function is ensured even with production-related manufacturing tolerances, of course, deviations of up to ± 1.5 to 2.0 ° are reliable.

In principle, it is also conceivable that the incoming light beam from the first outer entrance surface is deflected directly to the ink wettable surface and deflected in total reflection directly to the second outer light exit surface.

As in the 5 and 7 to recognize, is the optical fiber 34 curved backwards. This can be easily created space for other components, such as a recording 61 , The recording 61 may receive a projection (for example, a guide element) of the printer. In a view from the front (see 6 ) is the planar structure of the optical waveguide 34 to recognize. Furthermore, the upper end 33 of the optical fiber further forward than the lower end 46 , The optical fiber 34 thus also causes an offset W (see 5 ) relative to the insertion direction (or an offset W perpendicular to the offset V). By this offset W (as well as by the offset V) there is the advantage that transmitter and receiver of the upper light beam 32 can be arranged relatively far apart. Due to the offset W to the rear, there is the further advantage that the lower end 46 of the optical fiber 34 is better protected (for example, from shocks or dirt) or can be performed inside the ink cartridge. The cross section of the optical waveguide 34 (please refer 3 and 4 ) is (substantially) rectangular, with a preferably at least in the upper region downwardly decreasing longitudinal side to direct the light beam during insertion and in the inserted state to the same exit surface of the cartridge. If, on the other hand, the light beam is to emerge at different locations of the cartridge during insertion and in the inserted state, an arrangement of two light guides arranged one behind the other with respect to the insertion direction may be advantageous, for example (see 12 ).

The bullet 10 has (roughly) a (flat) cuboid plan.

7 shows a second embodiment of an ink cartridge in an oblique view. The second embodiment is the same as the first embodiment (with the following differences). Unlike the first embodiment, in the second embodiment, there is no cap 35 provided, however, a reflective mirror layer 62 , This has a reflective function, such as the cap if necessary 35 the first embodiment, and is intended to one on the upper end 33 of the optical fiber 34 meeting the light beam down towards deflecting 31 redirect. The mirror layer 62 therefore possibly forms like the inside of the cap 35 a Lichtumlenkfläche.

In the 8th to 12 a third embodiment of the ink cartridge is shown. This differs from the first two embodiments in particular in that not only one, but two optical waveguides are provided, namely a front (first) optical waveguide 63 and a rear (second) optical fiber 64 (please refer 12 ). The outer structure according to 8th is similar (in essence) to the external structure of the first two embodiments. In the front view according to 9 one recognizes that the light guide 36 deviates from the first two embodiments (see also 10 ).

As in 12 to recognize, are first 63 and second 64 Optical waveguide of the third embodiment (substantially) formed identical. Both optical fibers 63 . 64 are curved backwards and in a frontal view (see 11 ) just. An incident light beam (an upper light emitter) marked A here becomes at an oblique surface 65 in the optical fiber 63 ( 64 ) reflected or redirected after being at the corresponding light entry surface 37 occurred. From the upper end 33 of the optical fiber 34 the beam of light passes through it to the lower end 46 led the optical waveguide. From the lower end 46 from the light initially strikes vertically through an upper horizontal entrance surface of an asymmetric in this case deflection prism 67 and then hits an inclined surface 66 of the deflecting prism. From the slanted surface 66 The light beam will depend on whether the beveled surface 66 wetted with ink or not, reflected (or not). If there is no ink (ie, a reflection takes place), the light beam is in the direction of another inclined surface 68 directed. From there (if no ink on the beveled surface 68 is applied) it is in the direction of a projection 69 with an inclined surface 70 directed. From this projection 69 the light beam can be directed towards a (lower) light transmitter. The at the light exit surface 38 emerging light beam is marked B. It is possible to combine the third embodiment with the first or second. For example, in another embodiment, two optical fibers 63 . 64 be provided, which with a deflecting element 31 cooperate according to the first and second embodiment.

As already explained, is on the deflection prism 67 no light deflected when liquid on the outer surfaces of the deflecting prism 67 is applied. In an optional variant (dashed line) (see 12 ) can therefore have an air chamber 71 be provided on an outer surface 72 of the deflecting prism 67 is applied. This will ensure that the light from the first fiber optic 63 always through the deflection prism 67 is deflected and at the light exit surface 38 can escape. Regardless of the wetting (or the level of the cartridge) is thus always redirected light (in this area). In contrast, on the outside surface 72 in the region of the second optical waveguide 64 no air chamber 71 provided (in this alternative), so that the light of the second (rear) optical waveguide 64 can be used for example for level detection. In other embodiments, the air chamber 71 over the entire outer surface of the prism 67 extend or only in the region of the coupling of the light from the second (rear) optical waveguide.

In 12 is a first detector 73 and a second detector 74 drawn schematically. The detectors 73 . 74 each should consist of a light transmitter and a light receiver. The light emitter sends light perpendicular to the plane of the drawing 12 towards the receiver behind the drawing plane. Now the ink cartridge 10 along the arrow 17 moves, the light rays of the detectors 73 . 74 accordingly interrupted (or diverted). The light beam of the lower detector 74 is (completely) blocked as soon as the front wall 11 enters the light beam. Upon further insertion, the light beam of the lower detector remains 74 from the ink cartridge 10 blocked. The light beam of the upper detector 73 is deflected downwards as soon as the first fiber optic cable 63 penetrates into the light beam. For the receiver of the upper detector 73 This is like a (complete) blockage. Once the light of the upper detector 73 from the first optical fiber 63 (and later the second optical fiber 64 ), this light can be diverted from the receiver of the lower detector 74 (depending on its position).

The respective upper end 33 the light guide 63 . 64 can (in 12 back) through an opaque wall. This can ensure that the light from the upper detector 73 as soon as the front wall 11 the light beam of the upper detector 73 reached, is prevented from reaching the upper light receiver.

Ways upper 73 and lower 74 Detector the relative positioning according to 12 on, results in the third embodiment, the in 14 shown detected signal. The upper curve is the signal received by the upper light receiver. The lower curve is the signal received by the lower light receiver. The upper curve is correspondingly denoted by the reference numeral 73 ' marked, the lower with 74 ' , At time t1, the front wall occurs 11 the ink cartridge into the light beam of the lower detector 74 , At time t2, the front wall occurs 11 into the light beam of the upper detector 73 , At time t3, the first optical fiber enters 63 into the light beam of the upper detector 73 and directs light down towards the deflecting prism 67 , The lower detector 74 thus receiving light again (although the light beam of the light transmitter of the lower detector 74 is still interrupted). Between times t4 and t5, the upper sensor is located 73 between the first optical fiber 63 and the second optical fiber 64 , The lower sensor 74 is located between times t4 and t5 over a gap 75 between the lower ends 46 the optical fiber 63 . 64 , As the light beam of the lower detector 74 also in this position is interrupted by the cartridge wall (or other interrupting means) and the light of the optical fibers 63 . 64 at the gap 75 is passed by, the lower detector receives 74 no light. At (or after) time t5, the lower detector receives 74 , in whose ray of light at this time the lower end 46 of the second optical waveguide 64 is positioned light from the light emitter of the upper detector 73 over the second optical fiber 64 , but only when the cartridge is empty (= solid bottom line in 14 ). Is the deflection prism 67 in the area of the lower end 46 of the second optical waveguide 64 wetted with ink, is a deflection of the light of the first detector 73 through the deflection prism 67 prevented, so that after the time t5 continues to be no light to the lower detector 74 can catch (this is indicated by the dashed line in the lower curve of 14 illustrated). The second light guide 64 thus forms together with the Umlenkprisma a level detection means. The lower curve in 14 corresponds to the embodiment with the in 12 dashed air chamber. If this were omitted, a signal interruption would also occur between the times t3 and t4 (in the filled state of the cartridge or when wetting the deflecting prism). Would wetting over the entire outer surface of the prism 67 be prevented, it would always (and regardless of the level of the cartridge) in the lower curve of the 14 shown, solid course.

Corresponding further signal curves for distinguishing between different types of cartridges or cartridge states (etc.) can be generated by corresponding variations in the sequence of signal-conducting or signal-interrupting elements or corresponding element or cartridge sections in cooperation with the light emitters and light detectors (or particularly advantageously in the sense of FIG The invention with only one, in particular the upper detector, or additional lower sensor without second light transmitter) can be realized.

As in 11 schematically represented, the projection protrudes 69 upwards (towards the upper end 33 of the first optical waveguide 63 ) and runs to the fiber optic cable 63 (roughly) antiparallel. Extend the lead 69 , results in a (approximately) antiparallel extending third optical waveguide (also with the reference numeral 69 should be marked).

In 13 are still several alternatives for the first 63 or second 64 Recognize optical fiber. In addition to already in 11 shown embodiment with a (long) first optical waveguide 63 and a short lead 69 could be a shorter first fiber optic cable 63 ' be provided or a (longer) third optical fiber 69 ' respectively. 69 '' respectively. 69 ''' , The capital letters A, A 'each indicate a possible incoming light beam. The capital letters B, B ', B''andB''' each indicate a possible outgoing light beam.

At the presentation in 13 It can also be seen that a set of ink cartridges with first, second or third optical fibers of different lengths could easily make it possible to distinguish the ink cartridge. For example, a plurality of detectors could be provided at different locations in the printer.

Furthermore, it is also possible that, for example, the third optical waveguide 69 ''' is not continuous, but consists of several sections divided by inclined surfaces. These sections can be designed such that they each reflect only a part of the light. As a result, an incoming light beam could be distributed to a plurality of exiting light beams. Similarly, two incoming light rays could be combined by partially reflecting oblique surfaces, so that they emerge as a single beam of light. For example, light beams A, A 'could be irradiated simultaneously and emerge again as light beam B'. Analogously, a single light beam, A, could also enter and emerge again in the form of four different light beams B, B ', B "and B"'.

In 15 a section of a further embodiment of the ink cartridge is shown. This embodiment corresponds to the first (or alternatively the second) embodiment, but wherein the deflecting element 31 deviating from the first (or second) embodiment is formed. The difference is that the (lower) light entry surface 49 is opaque, and / or the corresponding light transmitter of the printer is missing. An opaque training means that the lower (second) light beam 48 through the deflecting element 31 is always interrupted (regardless of whether the deflection 53 wetted with liquid or not). The upper (first) light beam 32 is passed through the ink cartridge, as explained in the first or second embodiment.

The embodiments have been explained concretely using the example of a front loader ink cartridge for an inkjet printer. Of course, the basic principles are transferable to a top loader ink cartridge or other fluid or liquid receptacle. Therefore, it should be noted that all indications such as "top" or "bottom" or "front" or "rear" preferably correspond to the actual positioning in the room. In general, however, this may also mean only the position shown in the respective drawings, so that, for example, "top" must be replaced by "first" and "bottom" by "second" (analogously "front" by "first" and "front"). behind "by" second "). In general, the proposed fluid receptacle is suitable as an ink cartridge with a cartridge type / level detection. In general, however, the present fluid receptacle can be used as a tank, in particular a liquid tank, in which light signals can be deflected or coupled out. For example, a redirection of a light beam in a hard to reach lower area of a tank in which a level indicator (eg, level prism) is located could be performed and returned to a sensor (light emitter). In particular, prisms may be considered as fill level detection means, for example the prism described in detail with reference to the first and second embodiments or else a triangular prism (which is basically known in the prior art). In any case, a further light guide or a further light deflection to a return of a light beam can be advantageous. This provides increased freedom for the position of the detector (along the axis of the beam emerging from the prism, for example). In embodiments in which parts of the signal deflection (directly) come in contact with liquid (ink), a deflection can be carried out in one piece, or be prepared by corresponding bonding of the individual components in order to prevent the in this case disturbing gaps between the components.

A basic idea is to multiply use the signal of a single detector (on the one hand, to prevent a light signal from reaching the receiver of a first detector and, on the other hand, to allow the same signal to be redirected to a second light receiver). As a result, different signal sequences can be realized with only one light source.

In particular printer side, this can be a cost and space savings are made possible. By a signal diversion, a level detection can also be provided, for example, at the lowest point of a reservoir.

Specifically, an upper sensor can be used as a signal generator. In the prior art, in printers for front loader cartridges, the upper sensor often has a stronger and therefore a secure signal. If this stronger signal is used to make the lower sensor responsive, for example, the detection of the cartridge (and the ink level) becomes safer. The optical fiber (s) may be constructed and placed to allow desired bursts of signal to be detected by a cartridge in the respective ink jet printer.

The optical fibers are preferably made of polycarbonate (for example, by injection molding), although other materials may be used such as: PMMA, fiberglass, glass, other transparent, photoconductive materials. The optical fiber may have bends and curves. Preferably, however, a minimum bending or deflection radius of 2 mm is not exceeded.

In general, the proposed design also serves to avoid recognition problems when inserting ink cartridges (fluid receiving containers), in particular signal sequences and / or signal strength can be ensured in a more reliable manner.

15A shows an ink cartridge in a schematic view and a first signal receiver 1 and a second signal receiver 2 , The signal receiver 1 . 2 are in the 15A to 19B shown as circles. They should be oriented in such a way that they emit light perpendicular to the plane of the drawing 15A to 19B (ie perpendicular to the side wall of the cartridge) runs, can detect. In the following it shall be assumed (unless it is pointed out otherwise) that the signal receiver 1 a corresponding signal generator is provided which in a direction perpendicular to the drawing plane with the signal receiver 1 flees. The in the 15A to 19B shown cartridges include an optical fiber 34 and a level indicator 4 , In the 18A to 19B is still in each case next to the first and second light receiver, a third light receiver 3 intended. The 15A . 16A . 17A . 18A and 19A should each show the condition of the cartridge during insertion. The 15B . 16B . 17B . 18B and 19B should each show the state of the cartridge in the inserted state. The insertion is thus in the 15A to 19B from right to left (with stationary signal receivers 1 . 2 . 3 ).

The 15A and 15B show a structurally comparatively simple embodiment of an ink cartridge. In the position according to 15A are the signal receivers 1 . 2 over the front wall of the ink cartridge. This may possibly consist of a fundamentally opaque material, but with a corresponding adjustment of the light receiver, it is also possible to detect a front wall that basically consists of a light-transmitting material (if necessary, corresponding load resistances would have to be regulated, etc.). In 15B is the level detection means 4 in the light path of the light of the light transmitter. Depending on the level, the light is now transmitted or blocked, so that the level can be detected.

The light receiver 2 and the level detection means 4 are arranged here (essentially) in the middle. However, a different arrangement is conceivable (for example, below). In the concrete example according to 15A and 15B the light path may be, for example, by providing a semitransparent first exit slanted surface in a third light guide at the height of the light receiver 2 be set so that both light receivers 1 . 2 depending on the level of the ink cartridge a signal received or not. Preferably, however, the light of the transmitter is completely to light receiver 2 directed so that the light receiver 1 is blocked when the light guide is in the light barrier.

The embodiment according to 16A . 16B corresponds to the embodiment according to the 15A . 15B with the exception that the optical fiber 34 is offset to the rear. In the relative position between the cartridge and the light receiver 1 . 2 according to 16A are the light receivers 1 . 2 even before the fiber optic cable 34 , For example, by an opaque side wall of the cartridge, the light of the light emitter is blocked, so that the light receiver 1 . 2 can not receive a signal. In the relative position according to 16B is the light transmitter opposite the Entry surface of the optical waveguide 34 so that he can initiate light in these. The light goes down to the light receiver 2 (via the level detection means 4 ). The light receiver 1 thus receives no light. The light receiver 2 Depending on the level, it receives light or no light.

In the 17A . 17B an embodiment is shown which basically generates the same signals as the 16A . 16B , Here is the fiber optic cable 34 in the direction of the first light receiver 1 widening trained. In the position according to 17A the transmitter is already opposite the entrance surface of the optical waveguide 34 , so that light down towards level detection means 4 is passed and no light the first light receiver 1 can reach. At this time, however, is the light receiver 2 even before the level detection means 4 so that he can not detect the down-directed light. In this position, neither the first light receiver receives 1 still the second light receiver 2 a signal. In the position according to 17B the light emitter continues to conduct light towards the level detection means 4 ,

In the embodiments according to 15A to 17B light receivers are shown, which are arranged at the same height relative to the insertion direction (from right to left). Furthermore, there are always only two light receivers 1 . 2 intended.

The 18A such as 18B show an embodiment, which is also an optical waveguide 34 points towards the light transmitter or light receiver 1 (top) expanded. In addition to the first and second light receiver 1 . 2 is a third light receiver 3 intended. The third light receiver 3 is at the same height (relative to the insertion direction) as the first light receiver 1 , The second light receiver 2 is located opposite the first and third light receivers 1 . 3 offset to the front. In the position according to 18A the light transmitter is already opposite the entrance surface of the optical waveguide 34 , so that light is directed down and the upper light receiver no longer receives light. The second light receiver also does not receive light, as in the embodiments of FIG 15A to 19B only one light transmitter (at the light receiver 1 ) is provided. The third light receiver 3 Depending on the level, it receives light or no light. In the position according to 18B the light transmitter is still opposite the entrance surface of the optical waveguide 34 so that light is directed down and the first light receiver 1 no light is received. The second light receiver 2 is now opposite the exit surface of the level detection means 4 or a light guide and receives (depending on the level) light or no light. The third light receiver 3 is now already behind the level detection means 4 or the optical waveguide 34 and does not receive light.

One to the 18A . 18B similar embodiment is in the 19A . 19B shown. In the position according to 19A is the first and second light receiver at the same height and the third light receiver 3 based on the first and second light receiver 1 . 2 offset to the rear (relative to the insertion direction). In the position according to 19A the light transmitter is already above the optical waveguide, so that light is introduced into the optical waveguide and no light at the first light receiver 1 arrives. The second light receiver 2 is still ahead of the level detection means 4 or the optical waveguide 34 and also receives no light. The third light receiver 3 is opposite to the exit surface of the level detection means 4 or a third light guide 34 and thus receives (level dependent) light or no light. In 19B the light emitter is still opposite the entrance surface of the widened portion of the optical fiber 34 and introduces light into them. This reaches the first signal receiver 1 no light. The second light receiver 2 is in this position above the level detection means 4 or of the optical waveguide 34 and receives (level dependent) light or no light. The third light receiver 3 is already behind the level detection means 4 or the optical waveguide 34 and therefore also receives no light. As can be seen from this illustration, the embodiments act according to 18A . 18B and according to 19A . 19B in the same way.

20A shows a front view of an ink cartridge according to the prior art. On the front wall of the ink cartridge shown is a signal blocking element 5 shown. Left of the signal blocking element 5 is a light transmitter 50 arranged. Right of the signal blocking element 5 is a light receiver 51 arranged. This will depend on the position of the signal blocking element 5 Light of the light transmitter 50 blocked. In 20B is a front view of an embodiment of the ink cartridge according to the invention shown. In contrast to the prior art, light emitters are aligned 50 and light receiver 51 (based on the direction of the exiting light beam) not, but have a (significant) offset. Nevertheless, light from the light transmitter 50 to the light receiver 51 To be able to conduct is an optical fiber 34 intended. Will thus light (as in 20B ) not from a signal blocking element 5 it can be blocked by the light receiver 51 be detected. light source 50 and light receiver 51 are assigned to the same side wall of the ink cartridge.

20C shows a schematic front view of an ink cartridge according to the invention, which, as the embodiment according to 20B , a (relatively large) offset between light emitters 50 and light receiver 51 allows. In contrast to the embodiment according to 20B however, are light emitters 50 and light receiver 51 assigned to opposite side walls. To make this possible, the optical fiber is 34 compared to an embodiment according to 20B modified accordingly and has a (partially) curved course. The upper and lower inclined surfaces are parallel to each other. In the Embodiment according to 20B the upper and lower oblique surfaces are perpendicular to each other.

It should be noted at this point that all the above-described parts taken alone and in any combination, in particular the details shown in the drawings, are claimed as essential to the invention. Changes are familiar to the person skilled in the art.

LIST OF REFERENCE NUMBERS

A

incoming light beam

B

emerging light beam

V

offset

W

offset

1

light receiver

2

second light receiver

3

third light receiver

4

Level detection means

5

signal blocking element

10

ink cartridge

11

front wall

12

rear wall

13

upper wall

14

lower wall

15

first sidewall

16

second side wall

17

arrow

18

lower section

19

Ink supply port

20

top end

21

opening

22

cover

23-28

Positioning or sliding element

29

middle section

30

upper section of the front wall

31

deflecting

32

upper (first) light beam

33

upper end of the optical waveguide

34

optical fiber

35

(reflective) cap

36

light guide

37

Light entry surface

38

Light-emitting surface

39

front end of the upper wall

40

guide rib

41

upper spacer

42

lower spacer

43

room

44

Ink containing space

45

cover

46

lower end of the optical fiber

47

oblique reflector

48

lower (second) light beam

49

lower (second) light entry surface

50

light source

51

light receiver

52

ink

53

deflection

54, 55

leg

56

web

57-60

light deflection

61

admission

62

mirror layer

63

front (first) fiber optic cable

64

rear (second) optical fiber

65, 66

sloping surface

67

deflecting prism

68

sloping surface

69

Projection, third optical fiber

70

sloping surface

71

air chamber

72

outer surface

73, 74

detector

75

gap

76

extension

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102007001084 A1 [0002, 0005]
• EP 0573274 A2 [0003]
• EP 0626267 A2 [0003, 0009]
• WO 2011/035935 A1 [0004, 0004, 0009, 0079, 0079, 0088, 0088, 0098]
• EP 0779156 A1 [0005]
• DE 202008017958 U1 [0085, 0085]

Claims (27)

Fluid receptacle, in particular ink cartridge ( 10 ) for ink jet printers or adapters for receiving a fluid receiving container in a fluid dispensing device, wherein the fluid receiving container or the adapter comprises: - a light conducting device ( 36 ), - one of a first outer surface of the ink cartridge ( 10 ) associated light entry surface ( 37 ), - one of a second outer surface of the ink cartridge ( 10 ) associated light exit surface ( 38 ), wherein the light-conducting device ( 36 ) in the light entry surface ( 37 ) entering light to the light exit surface ( 38 ), so that it can escape there, wherein the light-conducting device ( 36 ) is formed such that light coming from the light exit surface ( 38 ), opposite to the light entering the light entry surface ( 37 ), has an offset (V, W). Fluid receptacle or adapter according to claim 1, characterized in that the first and the second outer surface of the ink cartridge are identical, wherein the distance between the light entry surface ( 37 ) and the light exit surface ( 38 ) is at least half the dimension of a major characterizing parameter, such as the height of the outer surface, or the first and second outer surfaces of the ink cartridge face each other. Fluid receptacle or adapter according to claim 1 or 2, characterized in that within a light path of the light guide ( 36 ) A level detection means, in particular at least one level prism is arranged, wherein the level detection means is a light blocking portion of a movable fluid in the fluid receiving container body and / or at least one level prism. Fluid receptacle or adapter according to one of the preceding claims, characterized in that within a light path of the light-conducting device ( 36 ) at least one optical waveguide ( 34 . 63 . 64 ) is arranged. Fluid receptacle or adapter according to one of the preceding claims, in particular according to claim 4, characterized in that the optical waveguide ( 34 . 63 . 64 ) is at least partially formed and arranged such that in the optical waveguide ( 34 . 63 . 64 ) incoming light is deflected. Fluid receptacle or adapter according to one of the preceding claims, in particular according to claim 4 or 5, characterized in that the optical waveguide ( 34 . 63 . 64 ) in an (average) angle of preferably> 30 °, more preferably> 60 °, even more preferably> 85 ° with respect to a surface normal of the light entry surface ( 37 ) or one of the light entry surface associated side wall extends. Fluid receptacle or adapter according to one of the preceding claims, in particular according to one of claims 4 to 6, characterized in that the optical waveguide ( 34 . 63 . 64 ) has a polygonal, in particular quadrangular, cross-section at least in sections. Fluid receptacle or adapter according to one of the preceding claims, in particular according to one of claims 4 to 7, characterized in that the optical waveguide ( 34 . 63 . 64 ) the light entry surface ( 37 ) and / or the light exit surface ( 38 ), which is preferably formed as a flat surface (are) and / or is formed parallel to a cartridge wall (are). Fluid receptacle or adapter according to one of the preceding claims, in particular according to one of claims 4 to 8, characterized in that a, the light entry surface ( 37 ), end of the optical waveguide ( 34 . 63 . 64 ) has an entry inclined surface, which on the light entry surface ( 37 ) incident light in the optical waveguide ( 34 . 63 . 64 ) and / or one, the light exit surface ( 38 ), end of the optical waveguide ( 34 . 63 . 64 ) has an exit inclined surface which in the optical waveguide ( 34 . 63 . 64 ) guided light from the optical waveguide ( 34 . 63 . 64 ), wherein the entry inclined surface and / or the exit inclined surface preferably have a reflector, which in particular comprises a reflection coating, such as a metal layer, preferably aluminum layer and / or silver layer, a dichroic layer or a reflector wall. Fluid receptacle or adapter, preferably according to one of the preceding claims, in particular according to one of claims 4 to 9, characterized in that the or an optical waveguide ( 34 . 63 . 64 ) over at least 20%, preferably at least 35%, even more preferably at least 50% of a (to the optical waveguide ( 34 . 63 . 64 ) parallel) side wall, in particular front wall extends. Fluid receptacle or adapter according to one of the preceding claims, in particular according to one of claims 4 to 10, characterized in that the optical waveguide ( 34 . 63 . 64 ) has an at least partially curved course. Fluid receptacle or adapter according to one of the preceding claims, in particular according to one of claims 4 to 11, characterized in that at least one second, preferably parallel optical waveguide ( 64 ) is provided, which is preferably parallel to the first optical waveguide ( 34 . 63 ), further preferably behind the first optical waveguide ( 34 . 63 ) and / or at least one third optical waveguide ( 69 ) is provided, which preferably one to the first or second, preferably parallel optical waveguide ( 34 . 63 . 64 ), substantially antiparallel guidance of the light allows and substantially parallel to the first and / or second optical waveguide, more preferably adjacent to the first, or second, preferably parallel optical waveguide ( 34 . 63 . 64 ), wherein the third optical waveguide ( 69 ) further preferably with the first optical waveguide ( 34 . 63 ) or the second, preferably parallel optical waveguide ( 64 ), photometrically connected. Fluid receptacle or adapter according to one of the preceding claims, characterized in that the light exit surface ( 38 ) at least in regions with a second light exit surface of light of a second light entry surface ( 37 ) is overlapping, in particular identical to this. Fluid receptacle or adapter according to one of the preceding claims, characterized in that a second light entry surface ( 37 ) is provided, preferably from the light to a second light exit surface ( 38 ) and / or is blocked by the light. Fluid receptacle or adapter according to one of the preceding claims, characterized in that the first light exit surface is associated with a light blocking portion, so that no light from one of the first light exit surface opposite surface portion can reach the first light exit surface. Fluid receptacle or adapter according to one of the preceding claims, characterized in that the light entry surface is arranged in a corner region and / or the light exit surface in a central region of a side wall of the fluid receptacle. System comprising at least one fluid receptacle, in particular an ink cartridge or an adapter, according to one of the preceding claims, and: - at least one light emitter ( 50 ) to light on the first and second light entry surface ( 37 . 49 ), - at least one light sensor ( 51 ), in particular preferably two light sensors, in order to generate light of the first or second light exit surface ( 38 ) to recieve. System comprising a fluid dispenser, in particular ink jet printer, and a fluid receptacle according to one of claims 1 to 16 or a system according to claim 17. Set of at least two fluid receiving containers, in particular ink cartridges, according to one of claims 1 to 16, wherein at least two fluid receiving containers, in particular ink cartridges, a different offset (V, W). A system for detecting and / or determining a type of replaceable fluid receptacle, or an adapter for receiving a fluid receptacle, in a fluid delivery device, in particular a printer, the system comprising the fluid receptacle and the fluid delivery device, wherein the fluid delivery device comprises at least a first and at least a second fluid delivery device Includes sensor and a signal generator, wherein the first sensor in the unused state of the fluid receiving container can receive a signal from the signal generator, wherein the fluid receptacle or adapter comprises a light guide, wherein when inserting and / or in the inserted state of the fluid receptacle or adapter, the light guide is arranged between the signal generator and the at least one first sensor that blocks the signal for the first sensor and a light path to at least a second sensor, or one with the second sensor cooperating level detection means, is redirected. System according to claim 20, characterized in that the light path comprises at least one light guide. A system according to claim 20 or 21, characterized in that the light path comprises at least one level detection means for detecting and / or displaying a fluid filling quantity. System according to one of claims 20 to 22, characterized in that the first signal transmitter is arranged with the first sensor in the form of a fork light barrier. Method for detecting and / or determining a type of replaceable fluid receptacle, or an adapter for receiving a fluid receptacle, in a fluid delivery device, in particular a printer, wherein the fluid delivery device at least a first and at least one second sensor and a Signaling device comprises, wherein the first sensor is irradiated when the fluid receptacle is not inserted by the signal generator, and the fluid receptacle or adapter includes a light guide, wherein the signal of the signal transmitter for the at least one first sensor during insertion and / or in the inserted state of the fluid receptacle or adapter the light-conducting device is interrupted and the signal is simultaneously or in chronological order via a light path to the at least one second sensor, or a cooperating with the second sensor fill level detection means, redirected. The method of claim 24, wherein the signal in the light path of the light guide is at least partially guided over a light guide. The method of claim 24 or 25, wherein the signal in the light path of the light guide is guided at least partially via a level detection means for displaying a fluid fill. Method for detecting and / or determining a type of replaceable fluid container, or an adapter for receiving a fluid container, and / or for determining a filling level of a fluid container, preferably using the fluid container or the adapter according to one of claims 1 to 16 and / or using a system according to one of claims 16 to 23 and / or according to a method according to one of claims 24 to 26, comprising the steps of: providing light, irradiating the light onto a first outer surface of the fluid receiving container, in particular the ink cartridge Light entry surface ( 37 ), - directing the incident light to a light exit surface ( 38 ), which is associated with a second outer surface of the fluid receiving container, in particular of the ink cartridge, wherein the light emerging from the light exit surface ( 38 ), opposite to the light entering the light entrance surface, has an offset (V, W), - receiving the light.

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