CN100393522C

CN100393522C - Ink conduit plugs for an inkjet printhead and methods of laser welding same

Info

Publication number: CN100393522C
Application number: CNB2004800148022A
Authority: CN
Inventors: J·J·布坎南; G·V·法塔克
Original assignee: Lexmark International Inc
Current assignee: Lexmark International Inc
Priority date: 2004-04-13
Filing date: 2004-04-13
Publication date: 2008-06-11
Anticipated expiration: 2024-04-13
Also published as: CN1795104A; EP1755897A4; WO2005102713A1; EP1755897A1

Abstract

The present invention relates to an ink-jet printing head which is provided with an integral main body, wherein an ink guiding pipe is arranged between the ink discharging port of an ink chamber and an ink feeding trough matched with heater flakes, and a plug of the ink guiding pipe is welded on the ink guiding pipe in a laser beam welding mode so as to prevent ink from leaking out of the ink guiding pipe when the ink flows to the ink feeding trough from the ink discharging port when used. In one actual operation, the plug of the ink guiding pipe is provided with a top cover and an insertion part, wherein the top cover has laser transparent peripheries, and the bottom face of the top cover can be welded to the opening of the ink guiding pipe through laser exposure. Laser beam welding techniques comprise laser beam advancing structure or simultaneous welding structure. In the other actual operation, the plug of the ink guiding pipe is provided with two plug parts connected by connecting plates which are assembled by flexible material belts or angularly assembled, and the belt-shaped plug parts can be welded by lasers or not be welded by the lasers.

Description

The ink conduit plugs of ink jet-print head and method for laser welding thereof

Technical field

The present invention relates to ink jet-print head, particularly be used for being sealed in the ink chamber of ink jet-print head and the chock plug of the ink conduit between the heater chip, relate in particular to this class ink conduit plugs is laser-welded to inkjet printhead body.

Background technology

Inkjet technology is known, in general, is the ink droplet by launching at once from ink jet-print head, impacts print media in desired position, as paper, and produces image.This printhead is supported as the removable printing frame in the ink-jet printer, and is moved back and forth with respect to the print media that advances by a kind of device, in time launches ink droplet according to the instruction of microprocessor or other controllers.The time control and the pixel pattern that is printed image of ink droplet emission adapt.Except that printer, the similar device that relates to ink-jet technology also has facsimile machine, photographic copying, plotter etc.

A kind of ordinary hot ink jet-print head comprises: a basis colored or monochromatic ink feeder source airborne or far-end, a heater chip, a nozzle or a restricting orifice that is connected heater chip, an I/O connector that is used in use heater chip being electrically connected to printer, as tape from (TAB) circuit that is dynamically connected.And heater chip generally comprises a plurality of thin film resistors or the heater of making by deposition on silicon base, shielding and etch technology.

In order to print or to launch a single melted ink, provide a kind of independent heater especially, so that Fast Heating small container ink with little electric current.This makes ink in this machine ink chamber (between heater and nozzle plate) vaporization, and in this discharge, is ejected on the print media via nozzle plate.

When making printhead,, usually be plastics, form a plurality of ink chamber by a kind of single material, and in each ink chamber and be connected between the ink feed slot of heater chip and be provided with ink conduit.This ink conduit is to form by Mobility Center pin in plastic pattern, like this, causes an opening in its main body, requires this opening of sealing before use, and therefore, ink can not leak.

In general, chock plug bonds by ultrasonic vibration or is welded on the opening of ink conduit.Yet ultra-sonic welded often causes burning particle and other materials enter printhead (may stop up ink conduit and/or nozzle bore), and makes the printhead premature failure.Bonding then has the problem of unpractical oversize hardening time.In U.S. Patent No. 6260961, people such as Seu have proposed the example of a ultra-sonic welded or adhered plug (seal 66).

Therefore, printhead be must make reliable, firm, fast, and obstruction ink conduit and nozzle do not caused.

Summary of the invention

Adopt with following ink jet-print head ink conduit plugs and this chock plug and be laser-welded to relevant device, method principle and the technology of method of printhead, address the above problem and other problems.

In one embodiment, ink jet-print head has the main body of an integral body, ink chamber's ink discharge outlet and and the corresponding ink feed slot of heater chip ink container between have an ink conduit.Ink conduit plugs is laser-welded on the printhead, prevents from use to leak from ink conduit when its outlet flows to ink feed slot because of ink.In another embodiment, ink conduit plugs has a top cover and an insertion section.Top cover has a laser-light transparent periphery, insert by opening in the top cover insertion section and the bottom surface of top cover with after open surfaces contact, this transparent periphery is welded on the opening of ink conduit (opening is limited by the surface along peripheral extension) its top cover bottom surface by the laser irradiation.Laser welding technology comprises: laser beam advances or welds topside periphery simultaneously along the top cover topside periphery.

In another embodiment, ink conduit plugs has two chock plug parts that link together, its method of attachment is: a kind of flexible material strip bends to a kind of specific orientation to the chock plug each several part, and perhaps, the connecting plate of a plurality of angled arrangements is arranged in a kind of specific orientation in advance to the chock plug each several part.There is the ink conduit plugs of the chock plug each several part that has connected to carry out the ink conduit of Laser Welding with the jet of sealed printhead.They also have top cover and insertion section, and all have the laser-light transparent feature.

A kind of ink-jet printer that this printhead is installed is also disclosed.

In the following description, these embodiment of the present invention and other embodiment, aspect, advantage and characteristics will be stated,, or, the present invention can be understood to a certain extent with reference to practice of the present invention with reference to these explanations of the present invention and accompanying drawing thereof.By instrument, program and the combination of in appending claims, pointing out thereof, can realize and obtain content of the present invention, advantage and characteristics.

Description of drawings

Figure 1A is a bottom perspective view by ink jet-print head of the present invention, and the ink conduit opening of printhead is by the ink conduit plugs closing seam of laser weld;

Figure 1B is the lateral perspective by the ink jet-print head of the Figure 1A of being shown in of the present invention;

Fig. 1 C is a top view by the ink jet-print head of the Figure 1A of being shown in of the present invention;

Fig. 1 D is a cutaway side perspective view by the ink jet-print head of the Fig. 1 of being shown in C of the present invention;

Fig. 2 is the decomposition diagram by opening ink conduit of the present invention, is illustrated in before the ink conduit plugs closure;

Fig. 3 be by of the present invention, by the ink conduit perspective view of ink conduit plugs closure;

Fig. 4 be by of the present invention, by the ink conduit plugs closure and when the peripheral welding operation by the perspective view of the ink conduit of laser beam flying;

Fig. 5 be according to of the present invention, by the perspective view ink conduit plugs closure and that in welding operation, this chock plug is carried out the ink conduit of laser weld;

Fig. 6 A is the bottom perspective view according to ink jet-print head of the present invention, and its opening ink conduit is by having the ink conduit plugs closing seam that two chock plugs partly link together;

Fig. 6 B is a perspective view according to ink jet-print head of the present invention, as to be shown in Fig. 6 A, and its ink conduit is by having the ink conduit plugs closure that two chock plugs partly combine;

Fig. 6 C is the perspective view according to the ink conduit plugs embodiment of of the present invention, a kind of band shape;

Fig. 7 is the side view according to another embodiment of ink conduit plugs of of the present invention, a kind of band shape;

Fig. 8 is the perspective view according to ink-jet printer of the present invention, and ink jet-print head is housed in the printer, and printhead has the ink conduit plugs of original position laser weld, and/or banded ink conduit plugs.

The specific embodiment

In the detailed description of most preferred embodiment, with reference to the accompanying drawing that constitutes this specification part, and the specific embodiment of the present invention of enforcement as an example.These embodiments are described in sufficient detail makes the technical staff can implement the present invention, certainly, can utilize other embodiment, is not deviating under the scope of the invention prerequisite, and its technology and other aspects all can change.Therefore, can not understand following detailed description on limited meaning, scope of the present invention is only stipulated by claims and its equivalent of appendix.

According to the present invention, the following describes the ink conduit plugs of banded ink conduit plugs and/or laser welded seal sealing print head ink conduit, thereby eliminated the problem of prior art ultra-sonic welded or adhered plug existence.

Each view description of Figure 1A to Fig. 1 D an inkjet printhead of the present invention, label is 10.This printhead has one to have inner 16 and outside 18 whole main body 14.In inside, many ink chamber 12 are arranged, hold initial ink or recharge ink.Shown in Fig. 1 C, inwall 20 is separated these ink chamber, and this wall is T-shaped, separately three isometric(al) ink chamber.These ink chamber preferably include the initial feed of dark blue, a dark red and yellow ink.In other embodiments, these ink chamber comprise black ink, photosensitive ink and/or dark blue, dark red and yellow ink.Though do not illustrate, those skilled in the art can judge that these ink chamber also can be connected to a far-end ink source of being carried by feeder sleeve.For producing back pressure, a foam insert or a pressure lung (not shown) are also contained in these ink chamber.

At the place, bottom of nearly printhead body 14, the arrangement direction during as printing, there is an ink discharge outlet 22 in each ink chamber, and ink is flowed out from ink chamber.A vertical tube 24 is arranged on ink discharge outlet, and it can have a filter (not shown) of one disposed thereon surperficial 26, prevents that field trash from flowing into ink discharge outlet from ink chamber.

Along the bottom surface 30 of main body, be provided with a plurality of ink feed slot 32, its shape and the orientation with the heater chip that will be connected on ink container adapt.During use, the ink of ink chamber flows into ink feed slot 32 from ink chamber 12 by ink discharge outlet 22.For each ink chamber 12, each ink discharge outlet 22 and each ink feed slot 32 are marked with a subscript a, b, c is corresponding with another kind of structure to show this structure respectively.In general, the ink of the preceding 12b of ink chamber directly flows to ink feed slot 32b downwards by ink discharge outlet 22b, the ink of the 12a of ink chamber, 12c then, flow downward by ink discharge outlet 22a, 22c, before arriving separately

ink feed slot

32a, 32c, also to pass through

horizontal ink conduit

40a, 40c.

When whole main body 14 was made, various core pins slided in model, thereby formed an opening 42 of ink conduits along the outside 18 of main body 14, if keep this opening or seal, this opening may cause ink leakage in use.Therefore, the present invention designs with this opening of an ink conduit plugs 50 sealings, prevents that ink leakage appears in ink when the ink conduit path flows during use.For preventing to burn particle contamination and/or block ink conduit and nozzle bore, the present invention designs and uses the laser weld ink conduit plugs, with the opening 42 of sealing ink conduit 40.

With reference to figure 2, in one embodiment, ink conduit plugs 50 has a top cover 52 and an insertion section 54.Ink conduit have one with opening 42 coplanes and around and limit the surface 56 of this opening.Before the welding, insert by opening 42 ink conduit plugs insertion section 54, and be frictionally engaged with the inwall 60 of ink conduit.The insertion section continues to insert, and contacts with the surface 56 of ink conduit until the bottom surface 58 of top cover 52.Fig. 3 illustrates an ink conduit plugs that installs fully 50.In the bottom surface 58 with surperficial 56 contact positions a laser weld interface 62 is arranged.

Though described ink conduit 50 and opening 42 are rectangular shapes, the present invention includes Any shape, can comprise circle, ellipse, rhombus, polygon, shaped form, irregularly shaped or other structure chock plugs, opening and surface especially.Those skilled in the art can understand that also there is a surface interface of coexistence mutually on ink conduit plugs 50 and surface 56, and one of them or both have an extension to surmount the part at another interface.

The present invention has also designed a kind ofly to be had only top cover 52 and not to have the ink conduit plugs 50 of insertion section 54.In such an embodiment, as shown in Figure 3, bottom surface 58 sealed opens 42 are only used in the present invention's design, and the periphery 58 of this bottom surface contacts with surface 56 and forms weld interface.Fig. 3 has described a kind of ink conduit plugs 50 that has or do not have the insertion section.

In any embodiment, the structure of ink conduit plugs all comprises a part with laser-light transparent feature at least.In one form, ink conduit plugs is basically fully to laser-light transparent, top cover can with insertion section or not in aggregates with insertion section 54.A kind of preferred composition of main body is that polyphenylene oxide adds polystyrene (PPE/PS), as the composition in the SE1 trade mark resin of Noryl, the top cover composition includes, but is not limited to GP polystyrene, HTPS, as SB (CBC), styrene-propene copolymer (SMMA).Other also comprises polyester and contain PET (PET), the polyester blend of polybutylene terephthalate (PBT) (PBT), and they and Merlon (PC), the admixture of acrylonitrile styrene acrylic (ASA) or other resins.When body is PET (PET), best top cover composition comprises above-mentioned polymer, and/or comprise copolyesters, glycol-modified PET (PETG), glycol-modified polymethylacrylic acid cyclohexanol terephthalate (PCTG) and sour modified polymethyl acid cyclohexanol (PCTA) etc.When top cover comprises low bearing glass fibrous material,, or during the polyester-type admixture, also can obtain suitable welding as natural PET (15% glass fibre).The other materials composition also comprises PC/PCTG, PC/PBT, and PC/PET, PBT/PETG, PET/PBT, certainly, when being welded to the polyester main body, these material requirements are adjusted laser power.In other embodiments, selected PBT/ASA is connected on a like styrene methylmethacrylate (SMMA) and styrene-acrylonitrile (SAN) the class material.A kind of PET/PBT admixture and SMMA, transparent propene nitrile-BS (ABS), ABS and methacrylate ABS (MABS) form good binding.These materials discussed above are summarized in appendix 1.When selecting material composition, should consider compatibility with ink.

In another kind of embodiment,, therefore only require that header field possesses the laser-light transparent feature because only the header field above above-mentioned weld interface 62 requires to carry out the laser irradiation.In other words, the another embodiment of the present invention design has only the ink conduit plugs periphery to possess the laser-light transparent feature.As shown in Figure 4, this periphery generally is made of the zone of ink conduit plugs 50 in abutting connection with weld interface 62, and (dotted line represent not to be excited as yet light-struck part) shone by the laser beam 70 along laser path 70 in this zone.As shown in the figure, the end face 51 of ink conduit plugs is subjected to the incoming laser beam impact.

In addition, shown in laser path 70 a kind of method that ink conduit plugs is laser-welded to ink conduit has been described, be called profile welding, therefore, laser beam is inswept or advance along this path, causes laser weld in its tail.Preferably lid periphery totally is subjected to laser-impact, still, among some embodiment, is not that whole periphery is subjected to laser-impact.

We have narrated when laser weld and have focused on the method for controlling laser beams with other with lens, but those skilled in the art can be judged, we have greatly simplified light path, light path can also comprise other optical textures, as speculum, fibre-optic cable, fiber waveguide, laser scanning device (as rotating how burnt speculum), other lenses, etc.Preferably, laser beam sources is in a kind of lasing light emitter 76, as laser diode.

In one embodiment, lasing light emitter be laser power be about 50W (watt) arsenide (AlGaAs) semiconductor laser of gallium aluminium of 810nm (nanometer) wavelength.

Other embodiment include, but is not limited to have all kinds continuous-wave laser of similar power level, as wavelength arsenide (InGaAs) semiconductor laser of the indium gallium of 940-990nm, phosphide (AlGaInP) semiconductor laser, the solid-state laser of gallium aluminium indium that wavelength is 630-680nm, as wavelength is neodymium-doped yttrium-aluminum garnet (Nd:YAG) laser instrument of the lamp pump twitch of 1064nm, wavelength is neodymium-doped yttrium-aluminum garnet (Nd:YAG) laser instrument that the diode pumping of 1064nm is twitched, etc.

Can adopt a clamping device, a pressing means or other member (not shown) so that exert pressure joint between ink conduit plugs top cover and ink conduit, make them keep relative position when welding.

As previously mentioned, at least a portion of ink conduit plugs 50 comprises a kind of laser-light transparent material.Ink conduit, promptly main body 14 comprises a kind of laser-light transparent material.Yet the transparency of these structures or absorbability do not mean that 100% laser is transmitted, blocks or absorbs.Only require that the transparency or opaqueness make enough laser by ink conduit plugs, and by absorbent body, to produce suitable Laser Welding.During welding, laser beam 72 is by the part to laser-light transparent of ink conduit plugs, and the main body 14 that can be absorbed laser absorbs.Because the laser irradiation, weld interface is heated, and makes top cover bottom surface and surface 46 fusings.During cooling, both integrate, and constitute the ink sealing.

Because known many parameters, involve the satisfaction of laser weld as the thickness t of welded piece, therefore, preferably, selected parameter can make at least the incident laser that impacts ink conduit plugs 50% by this ink conduit plugs.Those skilled in the art knows that this class parameter also comprises laser beam wavelength, laser beam incident angle, workpiece surface roughness, workpiece temperature, workpiece composition, when workpiece is plastics, also comprises additive, as fire retardant, plasticizer, filler, and colouring agent.

In the method for another kind of laser weld ink conduit plugs 50, as shown in Figure 5, form a kind of synchronous Welding Structure with a plurality of lasing light emitters 76, promptly impact the periphery of the end face 51 of ink conduit with the laser path of basic synchronization.As previously mentioned, this figure describes a light path of obviously simplifying, and this light path also can comprise fibre optics, optical wavelength, speculum, scanning means, lens, etc.

With reference to figure 6A, the outside 18 in the main body 14 of the integral body of ink jet-print head 10 is in ink discharge outlet 22a, and 22c and ink feed slot 32a, the ink conduit between the 32c have a plurality of opening 42a, and 42c should seal before use.Shown in Fig. 6 B, in one embodiment, a kind of this opening of ink conduit plugs 80 sealings of band shape.With reference to figure 6C, banded ink conduit plug 80 has a plurality of by connecting plate 84a, the chock plug part 82 that 84c links into an integrated entity.The same with the above, each chock plug part 82a, 82c has a top cover 86 and insertion section 88.

Insertion section

88a, 88c are respectively charged into opening 42a, 42c, and top cover bottom surface 90a, 90c contacts with the surface 56 of extending the formation opening.Because opening 42a is with respect to the oblique angle of opening 42c, so connecting plate 84a, 84c disposes (with an angled α of face who separates connecting plate) at an angle, and like this, two chock plug parts 82 are pre-configured by a proprietary orientation that is complementary with the angular orientation of two openings basically.During manufacturing, operating personnel can seal two openings of ink conduit easily simultaneously.

Those skilled in the art can be judged, though Fig. 6 C illustrates two connecting plate 84a, 84c can have any amount of connecting plate.The present invention even designed once preformed connecting plate makes the various piece of chock plug keep specific predetermined orientation.The present invention has also designed: the connecting plate shape and size can be with designing requirement, and as variations such as sealing intensity, material composition, cost, easily manufactured, decorations, all of these factors taken together all is achieved in this design.Those skilled in the art can judge that the angle configurations of a connecting plate 84a can be different from another connecting plate 84c, and this angle configurations of connecting plate can make the chock plug each several part mate with the angular orientation of two openings basically, and the present invention can work satisfactorily.

With reference to above-mentioned explanation, we reach the equivalent in composition, layout, configuration aspects to the ink conduit plugs 50 that aforementioned all embodiment are combined into a uniqueness.For ease of making, the composition of connecting plate 84 preferably is similar to chock plug part 82 substantially.

With reference to figure 7, with the link configuration that a kind of flexible material strip 92 replaces among Fig. 6 A-6C, apply a power (with line of force F indication), flexible material makes chock plug part 82 bend to a specific orientation, and this orientation is mated with the oblique orientation that is connected opening 42 basically.The composition of preferred flexible material comprises any material that is used to make the chock plug part, comprises the chemically flexible plastics of polyethylene, polypropylene and thermoplasticity, any mutation of rubber etc.

The method that connecting plate band or flexible material are connected to the chock plug part includes, but is not limited to bonding, heat staked, ultrasonic or laser weld etc.Though preferably banded ink conduit plugs laser weld closing any opening 42 those skilled in the art will appreciate that the present invention also can utilize the bonding and the method for ultrasound welding of prior art, and unrestricted, unless the appendix claim book limits to some extent.

Because the front has illustrated the ink conduit of ink conduit plugs jet of sealed printhead, then further specify the external device (ED) example that uses printhead below.Fig. 8 illustrates the external device (ED) of ink-jet printer 401 forms, and this device comprises an ink jet-print head 10.Printer 401 comprises a carriage 421 with a plurality of grooves 441, holds one or several printhead in the groove.As having known technically, apply a motoricity and affact on the driving belt 501, guide bracket 421 moves back and forth (by output 591 controls of controller 571) along an axle on the print zone 461 481.Carriage 421 is reciprocating with respect to print media (as paper 521), and paper 521 passes through print zone 461 along paper path from input paper frame 541 in printer 401, sends to output paper frame 561.

At print zone, as shown by arrows, carriage 421 moves back and forth at total reciprocating direction perpendicular to the paper direction of advance.According to the instruction of printer microprocessor or other controllers 571, the ink droplet in the guiding printhead in time sprays from heater chip.The time of ink droplet emission is controlled and is printed the image pixel pattern and adapts.Usually, this class pattern is to be produced by the device that the controller with (logical outside input) is electrically connected, and this device face outside printer is as computer, scanning machine, camera, display device, personal digital assistant etc.

In order to print or to launch single melted ink, this heater is provided with little electric current especially, with the Fast Heating small volume of ink.This makes ink vaporize in this machine ink chamber, and in this discharge, is ejected on the print media via nozzle plate.

Control panel with user selection interface 601 also can be provided to controller 571 to input 601, can be printer additional ability and durability is provided.

As described herein, except that thermal technology, the term ink jet-print head can also comprise piezo technology, etc., can also comprise that a kind of side penetrates structure, penetrate structure to replace this top.

Top explanation is used for diagram and various aspects of the present invention is described.Do not plan to make these explanations not have omission fully, or the present invention is confined in the disclosed precise forms.Selecting the foregoing description for use is for principle of the present invention and practical application being described best, can making the technical staff utilize the present invention in each embodiment, and carries out various remodeling to adapt to designed specific use.From fair, legal and proper right angle, all these classes are improved and are retrofited all in the determined scope of the invention of appending claims.

Claims

1. ink jet-print head comprises:

Main body with inside and outside integral body, there are a plurality of ink chamber its inside, and each ink chamber has an ink discharge outlet;

A plurality of ink feed slot, each groove all receive ink from an ink discharge outlet, between an ink discharge outlet and an ink feed slot at least one ink conduit are arranged, and described at least one ink conduit has an opening in the outside of main body;

At least one ink conduit plugs, its laser weld are on the opening of described at least one ink conduit, thereby the sealing ink conduit, like this, when ink flows by ink conduit during use, can prevent that any ink leakage from going out opening.

2. according to the described ink jet-print head of claim 1, it is characterized in that, described at least one ink conduit plugs has a top cover and an insertion section, and opening is inserted in this insertion section, and bottom surface of top cover with around opening and limit surperficial a contact of this opening.

3. according to the described ink jet-print head of claim 1, it is characterized in that described at least one ink conduit plugs is substantially transparent at its periphery to laser.

4. according to the described ink jet-print head of claim 1, it is characterized in that described main body is to absorb laser basically.

5. according to the described ink jet-print head of claim 1, it is characterized in that described at least one ink conduit plugs is fully transparent to laser basically.

6. according to the described ink jet-print head of claim 1, it is characterized in that each ink chamber comprises ink.

7. according to the described ink jet-print head of claim 2, it is characterized in that described main body is to absorb laser basically; Described a plurality of ink chamber is separated by an inwall at least; Each ink chamber all has an initial ink capacity; The quantity of described a plurality of ink feed slot equates with ink chamber and is located in the main body; Described top cover is to laser-light transparent, and the top cover bottom surface is laser-welded to the surface around opening.

8. according to the described ink jet-print head of claim 7, it is characterized in that the insertion section of described at least one catheter plug is to the laser substantially transparent.

9. according to the described ink jet-print head of claim 7, it is characterized in that, be provided with two ink conduit plugs, these two catheter plugs connect by band.

10. ink conduit plugs that is used for being welded to by Laser Welding the ink jet-print head ink conduit comprises:

A plurality of chock plug parts, each chock plug part all has a top cover and an insertion section, and arrange along the top cover bottom surface this insertion section, and its size and dimension is suitable for cooperating with the ink conduit opening;

A band that connects described a plurality of chock plug parts.

11., it is characterized in that described band is to be made of a kind of flexible material according to the described ink conduit plugs of claim 10.

12., it is characterized in that described band is that the connecting plate by a plurality of angled configurations constitutes, in advance described a plurality of plug head branches are configured to special orientation according to the described ink conduit plugs of claim 10.

13. according to the described ink conduit plugs of claim 10, it is characterized in that, described top cover at its periphery to laser-light transparent; Described band comprises connecting plate a kind of who is used for described a plurality of chock plugs are partly bent to the flexible material of special orientation and a plurality of angled configurations, in advance a plurality of plug head branches are configured to another special orientation.

14., it is characterized in that a plurality of chock plug parts and band have identical component basically according to the described ink conduit plugs of claim 13.

15. a method of making ink jet-print head comprises:

A kind of main body with inside and outside integral body is set, portion has a plurality of ink chamber within it, each ink chamber has an ink discharge outlet, be used for ink transport in a plurality of ink feed slot of main body, have an ink conduit between ink discharge outlet and ink feed slot at least, this ink conduit has an opening in the outside of main body;

Ink conduit plugs is laser-welded on the opening, when ink flows through ink conduit, prevents that ink leakage from going out this opening during use.

16. in accordance with the method for claim 15, it is characterized in that the laser weld ink conduit plugs also comprises the profile weldering or welds the periphery of ink conduit plugs simultaneously.

17. in accordance with the method for claim 15, it is characterized in that, ink conduit plugs comprises a top cover and an insertion section, and described method also comprises inserts opening to the insertion section, and makes the top cover bottom surface and contact around a surface also determining the ink conduit opening.

18. in accordance with the method for claim 15, it is characterized in that described opening limits around the surface by one; Described ink conduit plugs has top cover and insertion section, and lid periphery is transparent to laser; The ink conduit opening is inserted in the insertion section; The top cover bottom surface is contacted with the surface of described qualification opening; The top cover bottom surface is laser-welded to the surface of described qualification opening.

19. in accordance with the method for claim 18, it is characterized in that laser weld also is included in the top side propelling laser beam of whole periphery basically.

20. in accordance with the method for claim 18, it is characterized in that laser weld also comprises with laser beam impacts the top side of whole periphery basically simultaneously.