Abstract:
This invention relates to a device for retrofitting a printer which has a cartridge receiving device for holding interchangeable consumable material cartridges. In order to reduce the cost of production, transport and storage, the device has an insert which has fastening means for attachment in the cartridge receiving device of a printer, on the insert a locking means being made which blocks the fastening means in the fastening position when a consumable material insert cartridge is connected in the cartridge receiving device.

Description:
BACKGROUND OF THE INVENTION 
     This invention relates to a device and a process for retrofitting a printer which has a cartridge receiving device for holding interchangeable consumable material cartridges. 
     The existing art discloses printers, especially inkjet printers, in a host of different embodiments. For supply with consumable material, generally interchangeable disposable consumable material receptacles, so-called consumable material cartridges are used, for example ink cartridges. These consumable material cartridges are inserted for operation into cartridge receiving devices in the printer. When such a cartridge is empty, it is removed from the cartridge receiving device, disposed of, and replaced by a filled cartridge. 
     Especially ink cartridges for ink supply of inkjet printers are common as such interchangeable disposable consumable material cartridges. Generally they have a housing which is made for attachment in the corresponding receiver of a printer. In the housing of the ink cartridge the actual ink reservoir is an individual or several ink receptacles which can be filled with various inks. Each ink receptacle has an ink outlet opening for detachable connection to the ink supply connection of the printer. In this way ink is supplied to the printer in operation. When the ink contained in the ink receptacle has been used up, the empty ink cartridge can simply be removed from the receiver, and replaced by a full ink cartridge. The empty ink cartridges are either disposed of or refilled with ink for re-use. 
     Generally different types of printers have differently made cartridge receiving devices, i.e. generally compartments or shafts into which the ink cartridges can be inserted. They differ especially in shape and dimensions and in fastening means with which the cartridges are fastened in the printer. In this way a printer can be operated only with the consumable material cartridges of the respective printer manufacturer for the respective printer type. 
     In addition, cartridges for different printer types also differ from one another by electronic and mechanical identifications and keys. In part this differentiation of consumable material takes place preferentially for the purpose of tying the user of the printer to the exclusive use of the consumable material of the respective printer manufacturer which is suited in each case. 
     In this way a correspondingly large number of different consumable material cartridges must be kept ready; this means high production costs and also entails a correspondingly high cost for transport and storage. 
     In view of the problems explained above in the existing art, it is an object of the invention to reduce costs for production, transport and storage. 
     SUMMARY OF THE INVENTION 
     To achieve this object, a device for retrofitting a printer has a cartridge receiving device for holding interchangeable consumable material cartridges, 
     comprising an insert which has fastening means for fastening in a cartridge receiving device of the printer, 
     on the insert a locking means provided which blocks or locks the fastening means in the fastening position when a consumable material cartridge is connected in the cartridge receiving device. 
     For the first time the invention makes it possible to retrofit printers, i.e. to modify them such that standardized consumable material insert cartridges, hereinafter also called insert cartridges for short, can be used for a host of different printer types. The printer is modified by simple attaching the insert as claimed in the invention in the cartridge receiving device of the printer. In this connection the insert is matched to the respective printer type by its having fastening means which can be connected like the original consumable material cartridges intended for this printer, for example ink cartridges, to the cartridge receiving device. Retrofitting can therefore be easily done by the printer user by attaching this insert. 
     One particular of the device is that the locking means is blocked in the fastening position when an insert cartridge is inserted onto the fastening means. In this way the insert cartridge cannot be removed together with the device as claimed in the invention and cannot be inserted together either. 
     In one advantageous development the insert has connecting means for connection of a consumable material insert cartridge, the locking means being actuated when an insert cartridge is connected, so that the insert can no longer be removed from the printer. The connection means in this regard are all those parts of the insert which contribute directly or indirectly to holding the insert cartridge in the retrofitted cartridge receiving device, therefore also support or contact surfaces which can come into contact with the insert cartridge. Alternatively to rigid internals, the connection means can also have movable or elastic connecting elements, for example movable catch levers or elastic wall sections. 
     After installing the insert in the printer, standardized consumable material insert cartridges can be used which correspond to the insert or corresponding connection means of the insert. By making available inserts which are designed for use in different printers only by correspondingly different fastening means, however have uniform connection means, for a host of printer types standard consumable material insert cartridges can be used which can be used with different inserts. In this way the users of the printer are for the first time enabled to retrofit their printers themselves so that consumable materials from alternative manufacturers, so-called compatible insert ink cartridges, can also be used. Moreover, for the compatible manufacturers there is the possibility of offering insert ink cartridges for used in printers which have been retrofitted in this way, which differ from the original products of the printer manufacturer, which can optionally be produced more favorably and which also do not violate the patent rights of the printer manufacturers. For the end consumer there is the advantage that economical, comparable ink cartridges can be used and dependency on the original consumable material of the printer manufacturer which is generally offered at inflated prices is eliminated. 
     Furthermore, retrofitting of a printer with a device is especially advantageous with regard to environmental protection aspects. While specifically most original ink cartridges of printer manufacturers are made with complex electronic protective circuits and semiconductor memory means which must be disposed of with an emptied disposable cartridge, a printer which has been retrofitted can be operated with simpler ink tanks which themselves are more environmentally friendly in disposable use. Due to the invention electronic scrap can be reduced and natural resources are saved. 
     One important feature of the insert is that it can be fastened in the cartridge receiving device or removed again only when a consumable material insert cartridge (ink cartridge) is not connected or inserted. Because there is a locking means, the fastening means of the insert are fixed specifically in the fastening position in the cartridge receiving device of the printer as long as an ink cartridge is inserted. In this way it is not possible either to attach the insert first to the cartridge and to insert them together into the printer. Conversely it is not possible to remove the insert cartridge together with the insert from the printer. While the insert cartridge is being removed, the insert remains in the printer. This is also a good idea since generally a new, filled insert cartridge is being inserted again. 
     The insert is therefore unequivocally part of the printer, and not of the ink cartridge. This has the advantage of simpler handling than in those systems as have been described for example in the prior art in EP 440 261 B1 or EP 854 045 B1. They relate simply to consumable material cartridges, for example ink cartridges, in which a consumable material receptacle, for example an ink tank, is interchangeable in a frame or carrier. This frame or carrier however must always be removed from the printer when the store of consumable material is to be replaced. Thus the frame or carrier is a part of the cartridge, not of the printer. This makes handling more complex. Moreover it happens that users erroneously dispose of the carrier or frame together with the empty ink receptacle. Consequently retrofitting of the printer in the sense of this invention with the associated advantages does not take place. 
     Preferably the fastening means on the insert comprise stationary holding elements. They can be for example projecting cams, pegs, projections or edges, but also molded openings, depressions, grooves or the like. They are adapted for fastening in the cartridge receiving device of a printer. The fastening means can also be made similarly, as on an original cartridge which is suited for the respective printer type; alternatively other fastening points in the cartridge receiving device of the printer can be used to fix the insert. 
     It is advantageous for the fastening means to comprise connecting means which can moved relative to the insert. They can be for example movable catch levers, elastic catches, movable locks or the like. They can be moved out of a fastening position into a release position. The insert can only be inserted into the printer or removed in the release position of this fastening means. In the fastening position the insert can be neither removed from the cartridge receiving device when it is installed in the printer, nor can it be fixed. The invention the release position for mounting or dismounting can only be set when the locking means of the insert is unlocked, i.e. only when an ink cartridge is not connected to the insert. The insert consequently always remains in the printer when an ink cartridge is being replaced. Accordingly the insert is not a component of the consumable material, but a functional part of the printer in the installed state. 
     Preferably the connecting means for connecting a cartridge to the insert comprise stationary holding elements, for example support elements which can be supported against a connected insert cartridge or a receiving shaft for one or more insert cartridges. It is furthermore possible for the connecting means to have projecting cams, edges, pegs or other projections, or also molded openings, grooves or other depressions. They can be matched to standardized insert cartridges. 
     The connecting means can also comprise joining means which can be moved relative to the insert, such as for example movable catch levers, elastic catches, movable locks or the like. Because joining means which can be moved in this way are actuated, i.e. moved when an insert cartridge is attached, they can be moved into the position in which they prevent actuation or movement of the actuating means of the insert, i.e. block it. In this way a locking means as claimed in the invention can be easily implemented. 
     Furthermore the insert can have electrical contact elements, for example contact pins, plugs, sockets, or also circuit boards with contact surfaces which are accessible from the outside and which correspond to mating contacts in the printer. 
     In one advantageous development the insert comprises data storage means, for example electronic, optical or mechanical storage elements. The data storage means can be connected to electrical contact elements which can be connected to the printer. In this way data can be stored and exchanged with the printer. Alternatively contactless data and energy transmission can take place, for example optically or electromagnetically, as in transponders or RFID (radio frequency identification devices). 
     It is furthermore advantageous for the insert to comprise electronic circuits, for example semiconductor elements, semiconductor memories, digital or analog components and modules. These electronic circuits are attached to the original cartridges by the printer manufacturer and are used to store the ink level and also as an electronic key for excluding non-original cartridges from use. One major disadvantage is that the disposable original ink cartridges of the printer manufacturers after use must be disposed of together with the electronic circuits. Conversely it is one advantage of the invention that the electronic circuits can be designed such that they can be continuously used. Thus electronic scrap can be reduced and an important contribution to environmental protection can be rendered. 
     Contactless or wireless data transmission elements can be attached to the insert, if the printer requires this type of data communication. These data transmission elements can be for example light emitting diodes (LED) in the visible or invisible (infrared/ultraviolet) spectral region which can be modulated for optical data transmission. For other forms of data transmission, antennas, acoustic transducers or the like can also be used. Preferably data transmission elements can be connected to an electronic circuit on the insert which can have data converters, modulators or the like. 
     Furthermore the insert can have sensor elements, for example electrical, optical, acoustic or other sensors. With the sensors for example the current ink level can be detected, as can other state variables which can be relevant to the printing process, for example temperature or the like. The sensors can be connected to an electronic circuit. 
     It is likewise conceivable for the insert to have display means. They can be for example optical or acoustic transducers which deliver warning or information signals which are perceptible to the user of the printer. 
     An insert can be made such that it can be attached in the individual cartridge receiving device of the printer which is made for holding the individual original ink cartridge with one or more ink tanks. Alternatively it can be made for attachment in several cartridge receiving devices. Regardless, the connecting means of an insert can be made for holding one single or also several insert cartridges. The corresponding configuration of the insert then makes it possible to replace an original ink cartridge by an insert ink cartridge or if it is an original multicolor cartridge, also by several individual insert ink cartridges. 
     It can furthermore be advantageous for the connecting means to have second electrical contact elements, for example contact pins, plugs, sockets or also circuit boards with contact surfaces which are accessible from the outside. The contact elements are arranged such that they come into contact with the inserted insert cartridge and correspond to the mating contacts on the insert cartridge. 
     An electronic circuit, for example a semiconductor memory means, which is connected to the mating contacts on the insert cartridge, can be attached to the insert cartridge. The mating contacts can be connected to the aforementioned second contact elements on the insert when the insert cartridge is inserted into the insert. The semiconductor memory means can be for example a simple, commercial memory module which is only readable (ROM—read only memory), writable once (write once memory/protected memory) or repeatedly rewritable (EEPROM=electrically erasable programmable ROM) in order for example to store ink-specific data such as color, original ink level and current level as well as other properties of the ink. 
     The second contact elements of the connecting means which can be connected to the insert cartridge are interconnected in the insert preferably with the aforementioned first contact elements which can be connected to the mating contacts in the printer. By an electrically conductive, electromagnetic or other connection, energy and/or data signals can be exchanged between the mating contacts in the printer via the insert with an electrical circuit, i.e. memory means or the like, on the insert cartridge. Between the first and second contact elements in the insert there can be an electronic circuit, for example a data conversion circuit which converts the complex data exchange protocol of the printer into a simpler protocol so that simple, economical memory modules can be used on the insert cartridge. 
     The printer can be an inkjet printing means, the consumable material insert cartridge being an ink cartridge. 
     The process for operating a printer which has a cartridge receiving device for holding interchangeable consumable material cartridges comprises the following process steps:
         insertion and fastening of an insert in the cartridge receiving device,   connection of a consumable material insert cartridge, the insert being locked in the fastening position in the cartridge receiving device.       

     Before installation, i.e. when the insert is still outside the printer, first the fastening means are moved into the release position. In this way the insert can be inserted into the cartridge receiving device—conventionally a type of shaft or compartment—and the fastening means in the released position can be moved past the corresponding holding means (abutments, projections, openings, etc.) without intervention. In the end position the fastening means are moved into the fastening position, their engaging or interlocking with the corresponding holding means and in this way the insert is fixed in the cartridge receiving device of the printer. 
     After installation the insert remains for the time being in the printer. In this way it becomes essentially a component of the printer. 
     In the next step an insert cartridge is prepared and if movable connecting means are made on this insert cartridge and/or on the insert, these connecting means are moved into the release position. Then the insert cartridge is connected to the insert which is located in the cartridge receiving device. To do this the corresponding connection means are connected to one another. 
     The insert cartridge and the insert are made such that the fastening means which fix the insert in the cartridge receiving device are blocked or locked in this fastening position. This means that the fastening means cannot be released as long as an insert cartridge is connected to the insert. Accordingly the insert cannot be removed from the printer when the insert cartridge has been inserted. 
     Because the corresponding connection means are released and the cartridge is removed in the opposite direction of motion compared to insertion, the insert  11  can be easily replaced. The insert can remain in the printer so that as described a new, ink-filled insert cartridge can be inserted. 
     Only when a connected consumable material insert cartridge is separated from the insert can the insert be unlocked and then optionally removed from the cartridge receiving device, for example when an original ink cartridge of the printer manufacturer is to be used transitionally. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Embodiments of the invention are detailed below using the drawings. 
         FIG. 1  shows a device in a first version installed in a printer; 
         FIG. 2  shows the ink cartridge according the existing art before insertion into the cartridge receiving device of a printer; 
         FIG. 3  shows an ink cartridge as shown in  FIG. 1  in the inserted state; 
         FIG. 4  shows a detailed view of a semiconductor memory means as shown in  FIG. 1  and  FIG. 3 ; 
         FIG. 5   a  shows an insert cartridge, an insert and a cartridge receiving device as shown in  FIG. 1  before installation (=in the first installation phase); 
         FIG. 5   b  shows the function elements as shown in  FIG. 5   a  in the second installation phase; 
         FIG. 5   c  shows the function elements as shown in  FIG. 5   b  in the third installation phase; 
         FIG. 5   d  shows the function elements as shown in  FIG. 5   c  in the fourth installation phase; 
         FIG. 5   e  shows the function elements as shown in  FIG. 5   d  in the fifth installation phase; 
         FIG. 5   f  shows the function elements as shown in  FIG. 5   e  in the sixth installation phase (after installation=in the installed state); 
         FIG. 5   g  shows the function elements as shown in  FIG. 5   f  and  FIG. 1  before dismounting; 
         FIG. 6  shows the device as claimed in the invention in a second embodiment; 
         FIG. 7  shows the insert as shown in  FIG. 6  in an enlargement; 
         FIG. 8  shows the device as claimed in the invention in a third embodiment; 
         FIG. 9  shows a detailed view of the semiconductor memory means as shown in  FIG. 8 ; 
         FIG. 10  shows the device as claimed in the invention in a fourth embodiment; 
         FIG. 11  shows a detailed view of the semiconductor storage means as shown in  FIG. 10 ; 
         FIG. 12  shows the device as claimed in the invention in a fifth embodiment; 
         FIG. 13  shows the device as shown in  FIG. 7 ,  8  or  10  in a front view; and 
         FIG. 14  shows a modified device as shown in  FIG. 13 . 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIG. 1  shows a fundamental arrangement of a device in the form of an insert  1  which is installed in a cartridge receiving device  2  of a printer which is not shown in particular (inkjet printer). The insert ink cartridge ( 3 ) (insert cartridge) is connected to the insert  1 . 
     To explain the invention first the existing art is described below using the drawings in  FIG. 2  and  FIG. 3 . 
       FIG. 2  shows the same cartridge receiving device  2  of a printer as in  FIG. 1  and in the drawing at the top an original ink cartridge  4  of the printer manufacturer in the uninstalled state.  FIG. 3  shows the installed state, the same reference numbers being used. 
     The cartridge receiving device  2  has essentially the shape of a compartment or box which is open at the top; accordingly the insert opening is made at the top. On the bottom is the ink connection  5  which is connected in the printer to an inkjet printing head P which is schematically suggested. In the walls and on the bottom there are cartridge holding devices  6 ,  7 , and  8  which in this example are made as recesses or openings, but can likewise comprise holding projections or edges. First electrical contact springs  9  project from the wall (right one in this drawings) into the receiving space of the cartridge receiving device  2  and are connected to a schematically suggested electronic circuit E of the inkjet printer. 
     The original ink cartridge  4  which is shown in  FIG. 2  above the cartridge receiving device  2  is essentially an ink-filled, generally box-shaped receptacle in which ink can be located freely flowing in a sponge-like porous body or in a bag. This original ink cartridge  4  on the bottom has an ink outlet  10  and a fastening means in the form of a rigid peg  11 . Another fastening means in the form of a laterally protruding projection  12  is formed on the front side wall, that is, on the left in the drawings. On the opposite side wall (on the right in the drawings) as another fastening means there is a catch lever  13  which is attached on its lower end to the wall and which consists of elastic plastic. On its outside there is a locking catch  14 . If pressure is applied from the outside to the grip  15  molded onto its free end, the catch lever  13 , as indicated with the arrow, is bent elastically resiliently in the direction against the wall. 
     Underneath the catch lever  14  a circuit board  16  is attached which on the back bears a semiconductor memory means  17  which is electrically connected to the contact surfaces or contact pads  16  on the front of the board  16 . The circuit board  16  is attached countersunk so that the contact pads  18  lie essentially flush in the wall surface. Moreover the semiconductor memory means  17  is housed protected. 
     If the original ink cartridge  4  is inserted into the cartridge receiving device  2  in the direction of the arrow which is pointed down in  FIG. 2 , the inserted state as shown in FIG.  3  results. In this connection the peg  11  and the projection  12  engage the corresponding notches  8  and  6  respectively in the cartridge receiving device  2 . The locking catch  14  which is made on the catch lever  13  elastically snaps into the notch  7  so that it assumes its fastening position as shown in  FIG. 2 . In this state the ink outlet  10  is coupled to the ink connection  5  so that the printing head P is supplied with the ink contained in the original ink cartridge  4 . 
     At the same time the contact springs  9  rest electrically conductively against the contact pads  18  so that the electronics E of the printer can electronically exchange data with the semiconductor memory means  17 , for example information about the contents of the original ink cartridge  4 , the current level or ink-related information. 
     The circuit board  16  is shown enlarged in  FIG. 4 . In this connection on the contact pads  18  the region where the contact springs  9  adjoin is show in white by the broken line. 
     The operation and handling of the insert  1  as claimed in the invention as shown in  FIG. 1  is reproduced in  FIGS. 5   a  to  5   g  in several individual phases. 
       FIG. 5   a  shows the cartridge receiving device  2  and above it the insert  1  and the insert cartridge  3  each in a separate state before installation (installation phase  1 ). 
     The insert  1  is made in principle like a U-shaped frame which has the outer dimensions of the original ink cartridge  4  and comprises an installation space open to the top for the insert cartridge  3 . It likewise has fastening means which are made as a peg  21  underneath, a projection  22  forward, a catch lever  23  with a locking catch  24  and a grip  25  and correspond directly to the fastening means  11 ,  12 ,  13 ,  14  and  15  on the original cartridge  4  as shown in  FIG. 2  and  FIG. 3 . In the region above the ink connection  5  of the cartridge receiving device  2  there is a through opening  26  in the bottom of the insert  1 . The front section, i.e. the vertical leg of the insert  1  which is the left leg in the drawings, is made as a connecting means and above the projection  22  has a locking opening  27 . A grip  28  is molded on the free end of the indicated leg. 
     On the part of the insert which is the right part in the drawings, a semiconductor memory means  17  together with the circuit board  16  with contact pads  18  is attached at the same position as on the original ink cartridge ( 4  in  FIG. 1 ). 
     On the inside of the catch lever  23  a locking peg  29  is formed with action as claimed in the invention in the sense of a locking means which will be explained below. 
     The insert cartridge  3  is made as an ink receptacle similarly to the original cartridge  4  and like it has an ink connection  5 . The connection means however, differently from the fastening means of the original ink cartridge  4 , is a catch cam  30  which projects from the front wall (on the left in the drawings) to the outside. 
     In the first installation phase as shown in  FIG. 5   a , pressure is applied from the outside to the grip  25  of the catch lever  24 , generally by hand with one finger so that the catch lever  24  is bent in the direction of the curved arrow to the inside until is assumes the release position shown in  FIG. 5   b.    
     In the 2nd installation phase as shown in  FIG. 5   b  the locking catch  14  in the release position of the catch lever  13  is so near the rear (right) wall that the insert  1  can be inserted down into the cartridge receiving device  2  in the direction of the arrow pointed vertically down, the locking catch  14  remaining free, i.e. not engaging the notch  7 . 
     Upon insertion, the insert  1  is lowered until it rests with its lower side on the bottom of the cartridge receiving device  2 , as is shown in the 3rd installation phase in  FIG. 5   c . In this position the projection  22  of the insert  1  engages the notch  6  of the cartridge receiving device  2  and the peg  21  engages the recess  8  in the bottom. When released, the catch lever  13  is relieved spring-elastically to the outside; this is indicated with the bent arrow. In this connection the locking catch  13  assumes the fastening position and then engages the recess  7  as is shown in  FIG. 5   d . The contact pads  18  touch the contact springs  9  so that between the semiconductor storage means  17  and the printer electronics E an electrically conductive connection is produced which is used for power supply and for data exchange. Furthermore the through opening  26  from overhead leaves access to the ink connection  5  open. 
     In the 4th installation phase as shown in  FIG. 5   d , the insert  1  is installed ready for operation in the cartridge receiving device  2 . Here the locking catch  13  is in the fastening position, i.e. fixes the insert  1 . Then the insert cartridge, as indicated with the arrow pointed vertically down, can be inserted into the insert  1  from the top. In doing so the projecting catch cam  30  presses the free end with the grip  28  to the outside; this is indicated with the bent arrow. 
     In the 5th installation phase as shown in  FIG. 5   e , the insert cartridge  3  rests on the bottom of the insert  1 , the ink outlet  10  projecting through the through opening  26  and being connected to the ink connection  5  so that the ink located in the insert cartridge  3  can be delivered to the printing head P. Due to its elasticity the (left) grip  28  snaps back in the direction of the arrow, the catch cam  30  engaging the locking opening  27 . 
     Thus, in the 6th installation phase the operating position is reached which is shown in  FIG. 5   f . In this connection the recognizable particular feature as claimed in the invention is that the locking peg  29  in the support region  31  adjoins the wall of the insert cartridge  3  outside. In this way the catch lever  23  cannot be moved from the outside to the inside; this is indicated by the slashed arrow on the grip  25 . In this way the catch lever  23  cannot be moved into the release position as long as the insert cartridge  3  is located in the insert  1 . The locking peg  29  consequently forms a locking means which blocks the catch lever  23  which is used as a fastening means in the fastening position. Accordingly the insert  1  is locked and cannot be removed from the cartridge receiving device  2 ; this is illustrated with the slashed arrows pointed up. 
       FIG. 5   g  shows how the region with the locking opening  27  is bent to the outside by pressing on the grip  28  from the top such that the catch cam  30  is released and the insert cartridge  3  is released and can be removed up in the direction of the arrow for replacement. 
     Then a filled insert cartridge  3  can be inserted, as has been explained using  FIG. 5   d  to  FIG. 5   f . The insert  1  remains as part of the printer in the cartridge receiving device  2 . But if at a later time again original ink cartridges  4  are to be used, the insert  1  can be removed again by the installation phases according to  FIGS. 5   c, b  and  a  being undertaken in the reverse sequence and in the reverse direction as in retrofitting. 
       FIG. 6  shows in the same view as  FIG. 1  an insert in a second embodiment which is provided with reference number  101  and is shown enlarged in  FIG. 7 . For elements with the same action the same reference numbers as in  FIG. 1  are used. 
     The insert  101  in contrast to the first embodiment (1) is fixed simply with the peg  21  and the locking catch  24  in the recesses  8  and  7  of the cartridge receiving device  2 . Underneath the locking peg  29  an arm  132  is attached which can be moved elastically; this in indicated with the double arrow. On its elastically movable free end a catch projection  133  which projects to the inside is made. 
     The insert cartridge  103  is matched to use with the insert  101 . With a projection  143  it directly engages the recess  6  of the cartridge receiving device  2 . On the back which adjoins the insert  101 , it has a depression  144 . Upon insertion the catch projection  133  snaps into this depression  144  and fixes the insert cartridge  103  in the cartridge receiving device  2 . The bottom of the insert cartridge  103  is provided with a step  145  so that the rear (right in the drawing) region rests on the insert  101  and the front part (left) directly on the bottom of the cartridge receiving device  2 . 
     The enlarged view in  FIG. 7  shows how the catch lever  23  can be moved out of the middle fastening position shown by the solid line to the inside into the release position shown by the broken line. Since the locking peg  29  then projects over the arm  132 , the catch lever  23  can only be moved into the release position when an insert cartridge  103  has not been inserted. 
     The locking means works as in the first embodiment (1) shown in  FIG. 1  and  FIGS. 5   a  to  5   g.    
       FIG. 8  shows a third embodiment of an insert  201 . It is made essentially like the second version ( 101 ). In addition it has contact springs  251  which project on the inside and which are connected to an electronic circuit  252 . The circuit  252  can be for example a code converter which is connected in the insert to the semiconductor memory means  17 . The two circuits  17  and  252  can also be combined in one component or module which lies electrically between the contacts pads  18  and the contact springs  251 . 
     The insert cartridge  203  is built fundamentally the same as the second version ( 103 ). In addition it has contact pads  260  which are connected to an electronic circuit  261 , for example a semiconductor memory (EEPROM or the like) of simple design for storage of the ink level. In the inserted state the contact springs  251  of the insert  201  make contact with the contact pads  260  on the insert cartridge  203  and enable transmission of current and data. 
       FIG. 9  shows the electronic circuit  261  enlarged, a) in a side view as in  FIG. 8  and b) in a front view from the back. Installation on a circuit board  262  like circuit board  16  in  FIG. 4  results therefrom. 
     The fourth version of an insert  310  shown in  FIG. 10  in addition to the above described version  201  has a transducer or contactless data transmission means  370  which can be connected to the electronic circuit  252  and  17 . The transducer  370  can be an optical transmitter, for example a light emitting diode. In range of the transducer  370  the cartridge receiving device  2  has a receiver  371 , for example an optical sensor which is connected in the printer to its electronics E. 
     The circuit board  16  with the electronic circuit  17  and transducer  370  is shown in  FIG. 11  enlarged a) from the side and b) frontally. 
     In the fifth version of an insert  401  the locking means as claimed in the invention is implemented in that the insert cartridge  403  has a lock projection  429  which analogously to the locking peg  29  in the preceding versions blocks the catch lever  23  with the insert cartridge  403  inserted in the fastening position. 
       FIG. 13  shows a view of an insert  1 ,  101 ,  201 ,  301 , or  401  from the front side, i.e. relative to the representation in  FIG. 1 ,  6 ,  8 ,  10  or  12  seen from the right. The same reference numbers are used here. 
     The insert  501  as shown in  FIG. 13  is formed in principle from a plurality of individual inserts  1  (and the like) as in  FIG. 13 . They are mechanically interconnected via a common frame  580  so that simultaneous retrofitting of all cartridge receiving devices  2  of a multicolor printer is enabled, in the example for a four-color printer with yellow, magenta, cyan and black original ink cartridges (YMCK system). Each of the partial inserts  501  has a complete set of contact pads  18  which however are all connected to a single central semiconductor memory means or electronic circuit  17 . This has the advantage that a printer can be especially easily and quickly completely retrofitted by the user for the purpose of the invention. Moreover an especially efficient semiconductor memory means or electronic circuit  17  can be used so that an especially efficient and economical structure is possible. 
     REFERENCE NUMBER LIST 
     
         
           1  insert 
           2  cartridge receiving device 
           3  insert ink cartridge (consumable insert cartridge) 
           4  original ink cartridge 
           5  ink connection 
         P inkjet printer (printer) 
           6  cartridge holder (notch/recess at right) 
           7  cartridge holder (notch/recess at left) 
           8  cartridge holder (notch/recess bottom) 
           9  first contact springs 
         E electronic circuit 
           10  ink outlet 
           11  fastening means (peg) 
           12  fastening means (projection) 
           13  catch lever 
           14  locking catch 
           15  grip 
           16  circuit board (board) 
           17  semiconductor memory means 
           18  contact pads (contact surfaces) 
           21  fastening means (peg) 
           22  fastening means (projection) 
           23  catch lever 
           24  locking catch 
           25  grip 
           26  through opening 
           27  locking opening 
           28  grip 
           29  locking peg 
           30  catch cam 
           31  support region 
           101  insert 
           103  insert cartridge 
           132  arm 
           133  catch projection 
           143  projection 
           144  depression 
           145  step 
           201  insert 
           203  insert cartridge 
           251  contact springs 
           252  electrical circuit 
           260  contact pads (contact surfaces) 
           261  electrical circuit 
           262  circuit board (board) 
           301  insert 
           303  insert cartridge 
           370  data transmission element (transducer) 
           371  receiver 
           401  insert 
           403  insert cartridge 
           501  insert 
           580  frame