EP0713775A2 - Arrangement for a modular ink jet print head - Google Patents

Abstract

The printing head uses a stack of individual ink jet printing modules (1,4) employing an edge shooter principle, with piezoelectric actuators (11,41) having control electrodes coupled to lead lines (22,32) of a band conductor (2,3). The carrier layer (21,31) of the band conductor enclosing the lead lines is reinforced in the area between the ink jet printing modules and shaped to provide the required spacing between the piezoactuators and the jet rows of the successive modules and for accurate positioning of the latter.

Description

The invention relates to an arrangement for an ink print head, which is composed of ink print modules in stacked construction, which work according to the edge shooter principle and are equipped with plate-shaped piezoelectric actuators.

The inkjet print head is intended for use in small, fast printers, which in turn are part of modern machines for franking mail or for printing addresses. Such a printer is also suitable as a product labeling device.

In contrast to the usual office printer with line-by-line printing, printing is carried out as a single franking imprint in one pass of the postal matter. Corresponding to this substantially larger printing width - approximately one inch - the number of ink nozzles to be arranged one below the other and thus also the number of piezo actuators in an ink print head is considerably larger than with TinUm To meet modern convenience - clichés with word and picture symbols - for franking machines with good print quality, print resolutions of approximately 200 dpi (drops per inch) are required, which means ink printheads with the same number of nozzles and piezo actuators with a printing width of one inch.

If all of the nozzles were arranged in a single row of nozzles, the distance between two adjacent nozzles would be the pressure density measure t. In the case of more than one ink printing module, the pressure density measure results from the quotient of the nozzle spacing of a module by the number of modules. The usual nozzle openings are between 40 and 50 µm wide. With a cliché width of one inch and a resolution of 200 dpi, the adjustment errors must be kept below 10 µm.

Such ink print heads are inevitably designed in planar or stacked construction, on the one hand for reasons of the permissible dimensions and the packing density to be achieved therewith and on the other hand for reasons of economical production, see also DE 42 25 799 A1. Surface oscillators are usually used as piezo actuators in which a piezoelectric material, for example lead zirconate titanate (PZT), is arranged between two metal electrodes. The carrier plate - at the same time membrane plate over the ink pressure chambers - for the piezo actuators can consist of glass, ceramic, plastic or metal.

The way the modules are arranged in relation to one another in order to achieve a print density of 200 dpi and the contacting of the piezo actuators is a major problem.

An ink print head of the type described at the outset is known, DE 42 25 799 A1, which consists of several different modules, of which only one external module carries the common row of nozzles on its end face. All modules have ink pressure chambers that can be driven by piezo actuators for ink ejection, which are connected to the assigned nozzles via appropriately guided channels. The connection channels from module to module are inevitably orthogonal to the pressure chambers.

Spacers are arranged between the modules, which have an ink feed opening and ink feed-through openings and a cutout for the piezo actuators. The spacer parts can be in one part or two parts and consist of the same material as the piezo actuators.

Although the advantage of only a single row of nozzles is undisputed, the technological effort for producing the different modules is still considerable.

For the connecting channels running through several modules, a higher accuracy than that for the ink pressure chambers and a higher adjustment effort are required. The connection channels of different lengths require additional electronic control measures.

A piezoelectric ink print head with a monolithic piezoceramic body is also known, DE 38 05 279 A1, which has transducers arranged next to one another in parallel, each transducer having a planar, piezoelectric drive element, a pressure chamber, an ink channel and a nozzle. The pressure chambers, the ink channels and the nozzles are designed as cavities in the piezoceramic body. Each drive element has an outer electrode, an inner electrode and an active piezoceramic layer arranged between the electrodes. The drive elements are piezoelectrically separated from one another by cuts in the active piezoceramic layer. The inner electrodes of the transducers are electrically connected to one another. The electrical connection of the outer and inner electrodes takes place via a connecting strip or a strip conductor. A connection goes to the interconnected inner electrodes. The outer Electrodes are contacted separately with connections. The bottom of the piezoceramic body and the side opposite the nozzle front are attached to a holding frame. An ink connection piece and the connection tape are passed through openings in the holding frame. By installing the holding frame obliquely in a housing, the row of nozzles is inclined to the direction of movement of the recording medium and, as a result, the writing density of the ink print head is increased, see also GB 2 264 086 A, Fig. 3. Several holding frames or ink print heads can also be stacked one above the other and together in one Housing are used. In order for the rows of nozzles to be offset from one another, either the holding frame would have to be adapted differently, or the housing would have corresponding steps. The technological effort including adjustment effort is considerable.

Finally, an ink print head is known, US Pat. No. 4,703,333, in which a plurality of ink print modules which operate according to the side shooter principle are stacked one behind the other in such an inclined manner that on the one hand the nozzle area and on the other hand the ink supply area is free. A receiving frame with inclined steps is adapted to this scale-like arrangement. In order to realize the lateral offset of the nozzles to each other, the ink printing modules are provided with elongated holes through which screws are inserted which engage in the threaded holes of the steps. The modules have to be adjusted with a gauge and then locked with the screws. The individual ink printing module consists of a nozzle plate, an ink channel plate, a pressure chamber plate, a membrane plate with piezo actuators and a cover plate with a recess for a strip conductor for contacting the piezo actuators. An ink supply channel with two ink connection sockets is worked into the cover plate.

As can be seen from the description, the number is the individual parts and the adjustment effort considerably. A cleaning and sealing station adapted to this ink print head will be very complicated due to the gradation.

The purpose of the invention is to simplify the construction of the ink print head, to enlarge the area of use and to improve the service properties.

The invention has for its object to provide an arrangement for an ink print head from individual identical ink print modules with staggered rows of nozzles, in which the ink print modules are easy to replace, the number of components is reduced and adjustment effort is largely avoided.

According to the invention, this object is achieved according to the patent claims.

The proposed solution offers a number of advantages.

Since the tape conductor in the area between the ink printing modules is used according to the invention both as a contact element and also as a spacer and as an adjusting piece for the ink printing modules, complicated housings and front masks can be dispensed with.

It is also possible to form the carrier layer of the strip conductor in the area between the ink printing modules so that it acts only as an adjusting piece or only as a spacer. This could be the case if modified ink printing modules are used. The assembly of the tape conductor ends, including driver circuits for the piezo actuators and a connector outside the area between the ink printing modules, can be carried out at the manufacturer of the tape conductor in accordance with the desired specifications.

The nozzle row offset in order to achieve the desired print density is only achieved using the stop pieces the carrier layer of the strip conductors, so the ink printing modules can be constructed completely identically. For example, with three ink printing modules, the offset t from module to module is one third of the nozzle opening distance of a module. If the strip conductor is aligned with the preceding ink printing module, the stop pieces facing the subsequent ink printing module are offset more than the assigned adapted recesses in the subsequent ink printing module with respect to a defined side edge of the ink printing module.

Opposing pieces of the support layer which determine the offset of adjacent ink printing modules are offset in the same direction parallel to the front edge by the pressure density dimension t. In this way, it is possible to use the same print modules for ink print heads with different numbers of nozzles or ink print modules. The required offset can then be achieved solely by the offset of the stop pieces.

The recesses for the stop pieces in the ink printing modules extend in depth to the nozzle level. The stop pieces rest in these recesses with their cover surfaces. The distance s between two nozzle planes is determined exclusively by the distance between the top surfaces of opposing stop pieces of a carrier layer. The accuracy of the spacing of adjacent nozzle levels can be adjusted by precisely observing the distance from the top surface of the abovementioned stop pieces.

If the stop pieces are formed by merely partial thickening of the carrier layer, the required accuracy can already be generated in the casting or pressing mold.

If the stop pieces are made of a different material, such as ceramic or metal, then with an appropriate design of an adhesive form it is also about the design of the adhesive tool and the variation of the adhesive layer the desired accuracy can be achieved.

The recesses in the ink printing modules can already be made by means of laser etching or punching during the manufacture of the individual plates of the ink printing module.

Since the ink printing modules and the ribbon conductor ends in between are only stacked on top of one another and then held together non-positively, the modules can be easily replaced. In addition, there are easily verifiable units. This allows an effective inspection in the manufacturing process - thus an increase in the exploitation rate of the ink head manufacturing - and a better service. This is very important, especially since the ink printing modules with their many nozzle openings are still expensive components.

The assembly and contacting of the piezo actuators is simplified due to the one-piece comb-like design and extension of all electrodes in one plane. The piezo combs can be produced in a simple manner by first sawing the tooth structure into a square rod made of piezo material. The piezo combs are then sawn off in the form of disks.

The contact with the exposed ends of the connecting lines can be made using a low-melting solder, such as indium.

The invention is explained in more detail below using the exemplary embodiment.

Fig. 1

Eine Explosivdarstellung eines Tintendruckkopfes aus zwei Tintendruckmodulen,

Fig. 2

eine perspektivische Ansicht eines aus drei Tintendruckmodulen zusammengefügten Tintendruckkopfes,

Fig. 3

eine Ansicht gemäß Schnitt AA' nach Fig. 2,

Fig. 4

eine Draufsicht auf einen Bandleiter 2 im Bereich zwischen den Tintendruckmodulen 1 und 4,

Fig. 5

eine Draufsicht auf einen Bandleiter 3 im Bereich zwischen den Tintendruckmodulen 1 und 4.

Show it:

Fig. 1

An exploded view of an ink print head from two ink print modules,

Fig. 2

1 shows a perspective view of an ink print head assembled from three ink print modules,

Fig. 3

3 shows a view according to section AA 'according to FIG. 2,

Fig. 4

2 shows a plan view of a strip conductor 2 in the area between the ink printing modules 1 and 4,

Fig. 5

a plan view of a ribbon conductor 3 in the area between the ink printing modules 1 and 4.

The figures are drawn schematically for ease of illustration.

According to FIG. 1, an ink print head consists of two identical ink print modules 1, 4 and four ribbon conductors 0, 2, 3, 5 assigned to the same, of which those are identical which are assigned to the same ink print module side.

The first ink printing module 1 is composed of a first cover plate 12, a middle plate 13 and a second cover plate 14. The plates can be connected to one another by means of gluing or thermal diffusion bonding.

The cover plates 12, 14 are provided in their surface facing the central plate 13 with ink pressure chambers 123, 143, ink channels 124, 144, nozzle channels 126, 146 and ink supply channels 125, 145, see also FIG. 3.

All nozzle openings 147 of the ink printing module 1 run in a row in the second cover plate 14. For this purpose, the nozzle channels 126 are guided from the first cover plate 12 through the central plate 13 as nozzle channels 132 and on to the nozzle channels 146 in the second cover plate 14 and end there as nozzle openings 147. In this case, sixteen nozzle openings 147, 447 are provided for each ink printing module 1, 4. However, a real ink printing module will have 64 nozzle openings.

Piezo actuators 11, 15 are placed on the outer surfaces of the cover plates 12, 14 in the area above the ink pressure chambers 123, 143, one piezo actuator each above each ink pressure chamber. The cover plates 12, 14 are inevitably thinner in the areas above the ink pressure chambers 123, 143 and act there as a membrane. That is why the designation membrane plate is applicable. An alternative would be to design the cover plates as a thin smooth membrane plate and to shift all structures into the middle plate.

In order to facilitate production, assembly and contacting, the piezo actuators 11, 15 are designed in the form of a comb, the back of which is designed as an inactive region and the prongs of the comb are designed as the active region of a piezo layer 113, 153. Each tine represents a single piezo actuator, the base and top surface of which are covered with electrodes 111, 112, 151, 152. An electrode 112, 152, as a common electrode of all piezo actuators 11, 15, extends over an end face or the comb back into the inactive region of the opposite side. In this way, contact can be made from one side. Since the piezo actuators 11, 15 are combined in one component on the one hand and are spaced apart from one another on the other hand, a complex individual application and alignment over the ink pressure chambers 123, 143 is avoided. The component can be glued on as a whole using previously applied marking signs.

The electrodes 111, 112, 151, 152 are connected to associated exposed connecting lines 02, 03, 22, 23 of the strip conductors 0, 2 by means of a low-melting solder, such as indium, see also FIGS. 4 and 5.

The strip conductors 0.2 lying directly on the ink printing module 1 are designed such that they are on the one hand aligned with the first ink printing module 1 - meaning that stop pieces and associated recesses are positioned in the same way in relation to a defined side edge B - and on the other hand to the following second ink printing module 4 an offset to the pressure density dimension t is effected, see also FIGS. 2, 4 and 5. The thickness of the strip conductors 2 and 3 and 5 and 6 is dimensioned such that between the ink printing modules 1 and 4 and 4 and 5 with their attached piezo actuators 15, 41 and 45, 71 there is a sufficiently large distance. The strip conductor 2 is with stop pieces on both sides 211, 212, which engage in the associated adapted recesses 313 of the strip conductor 3 and in recesses 141, 422, 432 of the ink printing modules 1, 4, see also FIGS. 1, 3, 4 and 5.

Correspondingly, the strip conductor 3 is provided on both sides with stop pieces 311, 312, which engage in the associated adapted recesses 213 of the strip conductor 2 and in recesses 142, 421, 431 of the ink printing modules 1, 4.

In the example, the strip conductors 2, 3 have two pairs of stop pieces 211, 212 and 311, 312 for the sake of a simplified representation. In practical implementation, it will be useful to have three pairs of stop pieces. Correspondingly, two groups of the recesses would then be designed as an elongated hole and one group of recesses as a cylinder hole, see FIGS. 4 and 5.

The stop piece 211 lies with its top surface in the ink pressure module 1 on the nozzle plane 133. The stop piece 212 lies with its top surface in the ink printing module 4 at the nozzle plane 448. The parallel distance between the top surfaces of the opposite stop pieces 211, 212 of a strip conductor 2 is equal to the required distance s of the nozzle planes 133, 448 from one another. The plate thickness of the strip conductors 2 and 3 is accordingly dimensioned such that the required distance is determined exclusively by the stop pieces 211, 212. For this reason, the stop pieces 311, 312 of the strip conductor 3 are shorter in FIG. 3 than those of the strip conductor 2. In this case, they act as connecting elements. If the stop pieces 311, 312 were to lie with their cover surfaces against the associated nozzle planes 133, 448, the stop pieces 211, 212 would have to be made shorter.

The stop piece 211 is shorter than the stop piece 212 by the plate thickness of the strip conductor 3 and by a middle plate thickness, since it only penetrates the cover plate 14 in the recess 141. The stop piece 212 penetrates the strip conductor 3 in the recess 313, the cover plate 42 in the recess 422 and the middle plate 43 in the recess 432.

With respect to a defined side edge B of the strip conductors 2, 3 and the ink printing module 4, the recesses 313, 422 and 432 are offset less by the pressure density dimension t than the stop piece 212 on the strip conductor 2. The distance between the recesses 313, 422 and 432 from the side edge In this case, B is dimension c or d. The distance between the stop pieces 212 is correspondingly c + t or d + t. The distance between the recesses 142, 213 from the side edge B is c or d and the distance between the associated stop pieces 311 is c-t or d-t. This applies analogously to all other strip conductors and modules.

In this way, the first nozzle opening 447 of the second ink printing module 4 is offset from the first nozzle opening 147 of the first ink printing module 1 by the pressure density dimension t, and accordingly the other nozzle openings 447.

The strip conductor O is provided with a recess 014 for the piezo actuators 11. Its stop pieces 012 engage in associated adapted recesses 121 and 131 of the ink printing module 1. The strip conductor 2 is provided with a recess 214 for the piezo actuators 15.

The strip conductor 3 is provided with a recess 314 for the piezo actuators 41.

Since the section AA 'according to FIG. 2 is guided through the outermost nozzle opening 147 of the first ink printing module 1 and the view towards the adjacent outside is shown according to FIG. 3, only the connection from the ink supply channel 125 via the ink channel 124 to the ink pressure chamber 123 is also shown. the nozzle channel 126, the nozzle channel 132, the nozzle channel 146 and up to the nozzle opening 147 are visible.

The ink supply channels 125, 145 are orthogonal to the ink channels 124, 144 and parallel to the row of nozzle openings 147.

Since all ink printing modules 1, 4, 7 are constructed identically, and the strip conductors 2 and 5 and the strip conductors 3 and 6 are also constructed identically, stacking of the ink printing modules is possible in the desired manner, with equidistance and lateral offset of the nozzle rows being ensured.

The strip conductor 8 is provided with a recess 814 for the piezo actuators 75. Its stop pieces 811 engage in associated recesses 741 of the third ink printing module 7. A further discussion of the ink printing modules 4 and 7 is unnecessary, corresponding information can be found in the list of reference symbols and the drawings.

Reference symbols used

0

first band leader

01

Carrier layer of the strip conductor 0

012

Stop piece on the carrier layer 01 for ink printing module 1

014

Recess in the carrier layer 01 for piezo actuators 11

02

Connection lines to individual electrodes 111

03

Connection lead to common electrode 112

1

first ink printing module

11

Piezo actuator / s on the top of the ink printing module 1

111

Individual electrodes or control electrodes of the piezo actuators 11

112

common electrode of the piezo actuators 11

113

Piezo layer of the piezo actuators 11

12th

first cover plate or membrane plate of the ink printing module 1

121

Bore or recess in the cover plate 12 for stop piece 012

123

Ink pressure chamber / s in the cover plate 12

124

Ink channel between ink pressure chamber 123 and ink supply channel 125

125

Ink supply channel in cover plate 12

126

Nozzle channel in the cover plate 12

13

Center plate of the inkjet print module 1

131

Bore or recess in the center plate 13 for stop piece 012

132

Nozzle channel in the middle plate 13

133

Nozzle level in the ink printing module 1

14

second cover plate or membrane plate of the ink printing module 1

141

Bore or recess in the cover plate 14 for stop piece 211

142

Bore or recess in the cover plate 14 for stop piece 311

143

Ink pressure chamber / s in the cover plate 14

144

Ink channel between ink supply channel 145 and ink pressure chamber 143

145

Ink supply channel in cover plate 14

146

Nozzle channel in the cover plate 14

147

Nozzle opening / s in the ink printing module 1

148

Nozzle level in the ink printing module 1

15

Piezo actuator / s on the underside of the ink printing module 1

151

Individual electrodes or control electrodes of the piezo actuators 15

152

common electrode of the piezo actuators 15

153

Piezo layer of the piezo actuators 15

2nd

second band leader

21

Carrier layer of the strip conductor 2

211

Stop piece on the carrier layer 21 to the ink printing module 1

212

Stop piece on the carrier layer 21 to the ink printing module 4

213

Bore or recess in the carrier layer 21 for stop piece 311

214

Recess in the carrier layer 21 for piezo actuators 15

22

Connection lines to individual electrodes 151

23

Connection lead to common electrode 152

3rd

third band leader

31

Carrier layer of the strip conductor 3

311

Stop piece on the carrier layer 31 to the ink printing module 1

312

Stop piece on the carrier layer 31 to the ink printing module 4

313

Bore or recess in the carrier layer 31 for stop piece 212

314

Recess in the carrier layer 31 for piezo actuators 41

32

Connection lines to individual electrodes 411

33

Connection cable to the common electrode 412

4th

second ink printing module

41

Piezo actuator / s on the top of the ink printing module 4

411

Individual electrodes or control electrodes of the piezo actuators 41

412

common electrode of the piezo actuators 41

413

Piezo layer of the piezo actuators 41

42

first cover plate or membrane plate of the ink printing module 4

421

Bore or recess in the cover plate 42 for stop piece 312

422

Bore or recess in the cover plate 42 for stop piece 212

423

Ink pressure chamber / s in the cover plate 42

424

Ink channel between ink pressure chamber 423 and ink supply channel 425

425

Ink supply channel in cover plate 42

426

Nozzle channel in cover plate 42

43

Middle plate of the ink printing module 4

431

Bore or recess in the center plate 43 for stop piece 312

432

Bore or recess in the middle plate 43 for stop piece 212

433

Nozzle level in the ink printing module 4

434

Nozzle channel in the middle plate 43

44

second cover plate or membrane plate of the ink printing module 4

441

Bore or recess in the cover plate 44 for stop piece 511

442

Bore or recess in the cover plate 44 for stop piece 611

443

Ink pressure chamber / s in the cover plate 44

444

Ink channel between ink pressure chamber 443 and ink supply channel 445

445

Ink supply channel in cover plate 44

446

Nozzle channel in the cover plate 44

447

Nozzle opening / s in the ink printing module 4

448

Nozzle level in the ink printing module 4

45

Piezo actuator / s on the underside of the ink printing module 4

451

Individual electrodes or control electrodes of the piezo actuators 45

452

common electrode of the piezo actuators 45

453

Piezo layer of the piezo actuators 45

5

fourth band leader

51

Carrier layer of the strip conductor 5

511

Stop piece on the carrier layer 51 to the ink printing module 4

512

Stop piece on the carrier layer 51 to the ink printing module 7

513

Bore or recess in the carrier layer 51 for stop piece 611

514

Recess in the carrier layer 51 for piezo actuators 45

52

Connection lines to single electrodes 451

53

Connection cable to common electrode 452

6

fifth band leader

61

Carrier layer of the strip conductor 6

611

Stop piece on the carrier layer 61 to the ink printing module 4

612

Stop piece on the carrier layer 61 to the ink printing module 7

613

Bore or recess in the support layer 61 for stop 512

614

Recess in the carrier layer 51 for piezo actuators 71

62

Connection leads to single electrodes 751

63

Connection cable to the common electrode 752

7

third ink printing module

71

Piezo actuator / s on the top of the ink printing module 7

711

Individual electrodes or control electrodes of the piezo actuators 71

712

common electrode of the piezo actuators 71

713

Piezo layer of the piezo actuators 71

72

first cover plate or membrane plate of the ink printing module 7

721

Bore or recess in cover plate 72 for stop piece 612

722

Bore or recess in the cover plate 72 for stop 512

723

Ink pressure chamber / s in the cover plate 72

724

Ink channel between ink pressure chamber 723 and ink supply channel 725

725

Ink supply channel in cover plate 72

726

Nozzle channel in cover plate 72

73

Middle plate of the ink printing module 7

731

Bore or recess in the center plate 73 for stop piece 612

732

Bore or recess in the center plate 73 for stop 512

733

Nozzle level in the ink printing module 7

734

Nozzle channel in the middle plate 73

74

second cover plate or membrane plate of the ink printing module 7

741

Bore or recess in the cover plate 74 for stop piece 811

743

Ink pressure chamber / s in the cover plate 74

744

Ink channel between ink pressure chamber 743 and ink supply channel 745

745

Ink supply channel in cover plate 74

746

Nozzle channel in the cover plate 74

747

Nozzle opening / s in the ink printing module 7

748

Nozzle level in the ink printing module 7

75

Piezo actuator (s) on the underside of the ink printing module 7

751

Individual electrodes or control electrodes of the piezo actuators 75

752

common electrode of the piezo actuators 75

753

Piezo layer of the piezo actuators 75

8th

sixth band leader

81

Carrier layer of the strip conductor 8

811

Stop piece on the carrier layer 81 to the ink printing module 7

814

Recess in the carrier layer 81 for piezo actuators 75

82

Connection leads to single electrodes 751

83

Connection cable to the common electrode 752

B

Defined side edge of the ink printing modules 1.4.7 and the ribbon conductor 0.2.3.5.6.8

a

Distance of the recess 214 to the front edge

b

Distance of the recess 314 to the front edge

c

Distance of the one group of the recesses 213,313 and the spacers 211,312 from the defined side edge B

d

Distance of the other group of recesses 213, 313 and spacers 211, 312 from the defined side edge B

s

Nozzle plane distance

t

Print density dimension (dpi = drops per inch)

Claims (15)

Arrangement for an ink printhead, which is composed of individual ink printing modules in stacked construction, which work according to the edge shooter principle, the rows of nozzles are offset from one another and which are equipped with plate-shaped piezo actuators, the electrodes of which are contacted with connecting leads of a strip conductor, which in a carrier layer enveloping this are embedded,
characterized in that the carrier layer (21, 31) of the tape conductor (2, 3) is reinforced and shaped in the area between the ink printing modules (1, 4) in such a way that it acts as a spacer to maintain the required distance between the identical adjacent ink printing modules (1 , 4) and as an adjustment piece for the exact fixing of the ink printing modules (1, 4) and their offset relative to one another. Arrangement for an ink printhead, which is composed of individual ink printing modules in stacked construction, which work according to the edge shooter principle, the rows of nozzles are offset from one another and which are equipped with plate-shaped piezo actuators, the electrodes of which are contacted with connecting leads of a strip conductor, which in a carrier layer enveloping this are embedded,
characterized in that the carrier layer (21, 31) of the tape conductor (2, 3) is reinforced and shaped in the area between the ink printing modules (1, 4) in such a way that it acts as a spacer to maintain the required distance between the identical adjacent ink printing modules (1 , 4) is formed. Arrangement for an ink printhead, which is composed of individual ink printing modules in stacked construction, which work according to the edge shooter principle, the rows of nozzles are offset from one another and which are equipped with plate-shaped piezo actuators, the electrodes of which are contacted with connecting leads of a strip conductor, which in a carrier layer enveloping this are embedded,
characterized in that the carrier layer (21, 31) of the strip conductor (2, 3) in the area between the ink printing modules (1, 4) is reinforced and shaped in such a way that it acts as an adjusting piece for the exact fixing of the ink printing modules (1, 4) and their Offset is formed against each other. Arrangement according to claims 1 to 3, characterized in that the carrier layer (21, 31) is provided on both sides with stop pieces (211, 212, 311, 312) which engage in associated adapted recesses (121, 131, 41, 42, 421, 41, 432, 441, 422) of adjacent ink printing modules (1, 4). Arrangement according to claims 1, 2 and 4, characterized in that the stop pieces (211, 212 or 311, 312) of a carrier layer (21 or 31) in the ink printing modules (1, 4) bear against the nozzle plane (133, 148, or 433, 448) and the distance between the top surfaces is opposite Stop pieces (211, 212 or 311, 322) of a carrier layer (21 or 31) of a strip conductor (2 or 3) are equal to the required distance (s) of the nozzle planes (133 or 148, 433 or 448) of adjacent ink printing modules (1,4). Arrangement according to claims 1, 3 and 4, characterized in that the carrier layer (21) determining the offset is aligned with the first ink printing module (1) and the adjacent carrier layer (31) is aligned with the following second ink printing module (4) and in that the latter faces two Stop pieces (212) of the carrier layer (21) engage in assigned adapted recesses (313 and 422, 432) which are offset in relation to a defined side edge (B) relative to the stop pieces (212) by the pressure density dimension (t). Arrangement according to claims 4 and 6, characterized in that mutually opposite stop pieces (211, 212) of the carrier layer (21) determining the offset of adjacent ink printing modules (1, 4) are offset in the same direction parallel to the front edge by the pressure density dimension (t) and orthogonally to one another . Arrangement according to Claims 1 to 4 and 6, characterized in that the carrier layers (21, 31) of the strip conductors (2, 3) with recesses (213, 313) for the associated stop pieces (311, 212) and with recesses (214, 314) for the associated piezo actuators ( 15, 41) are provided. Arrangement according to claim 4, characterized in that the stop pieces (211, 212, 311, 312) are formed by thickening and shaping the carrier layer (21, 31). Arrangement according to claim 4, characterized in that the stop pieces (211,212,311,312) consist of ceramic material. Arrangement according to claim 4, characterized in that the stop pieces (211,212,311,312) consist of metal. Arrangement according to claims 10 and 11, characterized in that the stop pieces (211,212,311,312) are glued onto the carrier layer (21,31). Arrangement according to claims 1 to 3, characterized in that the carrier layer (21, 31) consists of a construction material such as Kapton. Arrangement according to 1 to 3 and 8, characterized in that the carrier layer (21, 31) of the strip conductor (2, 3) is removed in the area above the piezo actuators (11, 15, 41, 45) and the connecting lines (02, 03,22,23,32,33) are connected to the assigned electrodes (111,112,151,152,411,412,451,452) of the piezo actuators (11,15,41,45). Arrangement according to claim 14, characterized in that the connecting lines (02,03,22,23,32,33) are connected to the associated electrodes (111,112,151,152,411,412,451,452) by means of a low-melting solder, such as indium.

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