EP0970350B1 - Impulstintenstrahlgerät mit unterdruckschutz - Google Patents
Impulstintenstrahlgerät mit unterdruckschutz Download PDFInfo
- Publication number
- EP0970350B1 EP0970350B1 EP98911836A EP98911836A EP0970350B1 EP 0970350 B1 EP0970350 B1 EP 0970350B1 EP 98911836 A EP98911836 A EP 98911836A EP 98911836 A EP98911836 A EP 98911836A EP 0970350 B1 EP0970350 B1 EP 0970350B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- chamber
- fluid
- compliant
- valve
- impulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
- B41J2/17503—Ink cartridges
- B41J2/17506—Refilling of the cartridge
- B41J2/17509—Whilst mounted in the printer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/015—Ink jet characterised by the jet generation process
- B41J2/04—Ink jet characterised by the jet generation process generating single droplets or particles on demand
- B41J2/045—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers
- B41J2/055—Devices for absorbing or preventing back-pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/175—Ink supply systems ; Circuit parts therefor
Definitions
- This invention relates to a drop-on-demand or impulse fluid jets which eject a droplet of fluid such as ink in response to the energization of a transducer, according to the preamble of claim 1.
- An impulse fluid jet apparatus of this type is known from US-A- 4 575 738. It shows a module including a print head. Ink entering the module flows through a check valve, which functions as a low frequency ink transient suppressor mechanism; thereafter through a compliant chamber, which functions as a high frequency ink transient suppressor mechanism; and then through a passageway to an ink jet chamber of the print head.
- Said compliant chamber includes a filter and a diaphragm.
- Impulse fluid or ink jets are designed and driven so as to eject a droplet of fluid such as ink on demand from a chamber through an orifice in the chamber.
- impulse jets are utilized in many applications including industrial applications, it is important that the impulse ink jets operate reliably. Such reliability can be jeopardized where the impulse jets can be deprimed due to fluid disturbances in the supply of ink to and through the impulse jet. Such depriming can occur as a result of brief disturbances to the fluid supply as well large, longer disturbances caused by, for example, bumping the apparatus.
- an apparatus for preventing depriming of an impulse jet.
- an apparatus for preventing depriming of an impulse jet in response to small and/or brief disturbances in the ink or fluid supply line to the impulse ink jet or elsewhere.
- an apparatus for preventing depriming of an impulse jet in response to large and/or longer disturbances in fluid supply line or elsewhere.
- an impulse ink fluid apparatus comprises a transducer, and a fluid jet chamber coupled to the transducer, the chamber having an orifice through which droplets of fluid are ejected in response to the energization of the transducer.
- a fluid supply is coupled to the fluid jet chamber through a compliant chamber which forms at least part of a low pass filter substantially attenuating fluid disturbances having a duration substantially less than time constant of the low pass filter formed by the compliant chamber.
- the time constant represented by the product of the fluidic capacitance of the compliant chamber and at least a portion of the fluidic resistance of the fluid supply substantially attenuates pressure disturbances having a duration less than 0.01 the value of the time constant. In the preferred embodiment, disturbances of less than 0.01 and preferably less than 0.05 seconds will be attenuated.
- the compliant chamber comprises a compliant member for absorbing pressure waves.
- the compliant chamber comprises a flexible diaphragm which is nonplanar in the undisturbed state such that deformation is nonlinear with respect to changes in pressure.
- pressure waves are absorbed without pressure increases in the compliant chamber.
- the compliant chamber comprises an air passage allowing ambient air pressure to flow through and reach the compliant member.
- the compliant chamber may also include a filter permitting the flow of ink through the filter from the ink supply to the fluid jet chamber.
- the apparatus further comprises at least one check valve located between the fluid jet or a manifold serving a plurality of fluid jets and the compliant chamber for preventing the reverse flow of ink flow of ink from the ink jet chambers to the compliant chamber while permitting ink to flow from the compliant chamber to the ink jets.
- Each check valve includes passageways permitting the passage of air through the check valves.
- the check valve comprises a valve seat, a valve member, a valve support comprising at least one passage permitting fluid flow between the valve seat and the valve member and through the fluid passage toward the fluid chamber.
- the check valve includes a valve body forming the valve seat and containing the valve member and the valve support such that the fluid passage in the valve support is located adjacent to the valve body.
- the valve support comprises a plurality of passages located adjacent to the valve body.
- an impulse fluid or ink jet print head 10 comprises a chamber plate 12 and an orifice plate 14 forming a plurality of ink jet chambers 16 coupled to a transducer 18 through a foot 20 and a diaphragm 22 shown in enlarged form in Fig. 5.
- the transducer 18 is energized and de-energized by applying a voltage transverse to the longitudinal axis of the transducer 18 so as to operate the transducer in an expander mode, i.e., the transducer expands and contracts along the longitudinal axis parallel to arrows 19 to cause volumetric changes in the chamber 16 to jet droplets from orifices 15 in the plate 14.
- fluid in the form of ink is supplied to each chamber 16 through restricted inlets 24 formed in a restrictor plate 26 between the chamber plate 12 and a spacer plate 27 which is sandwiched up against the diaphragm 22 best shown in Fig. 5.
- restricted inlets 24 are shown in Fig. 6 which depicts the restrictor plate 26 having enlarged openings 28 as explained in co-pending application Serial No. 08/823,718, filed March 25, 1997 which is incorporated herein by reference.
- the foregoing structure including the size of the chambers 16 in conjunction with the resonant frequency of the transducers 18 produce a high performance ink jet.
- each of the restricted inlets 24 is supplied by a manifold 30 shown in Figs. 1 and 5 as well as Fig. 2.
- the manifold 30 is supplied with fluid in the form of ink through two check valves 32 as shown in Figs. 1, 2 and 5.
- the check valves 32 are designed in a manner so as to prevent the reverse flow of ink from the chamber 24 back through the fluid supply lines in the print head 10.
- the check valves 32 comprise a diaphragm 34 which seats against a valve seat 36 in the print head 10 when the valve is closed as shown in dotted lines in Fig. 5.
- the diaphragm 34 when open permits the flow of ink into the chamber 16 as shown in Fig.
- FIG. 5 when seated against the end 38 of a check valve insert or support 40 as shown in full in Fig. 5.
- Details of the support 40 can be best appreciated by reference to Fig. 7 wherein flow channels 42 leading away from the end 38 and toward the manifold 30 are provided and a flange 44 through which the channels 42 pass is also provided for engaging a seat 46 in the print head in the valve body for the diaphragm 34 as best shown in Fig. 5.
- the check valves 32 are located in the print head at the end of supply channels 48.
- the supply channels 48 are terminated in a compliant chamber 49 shown in Figs. 1 and 2 and best shown in Figs. 3 and 4.
- the compliant chamber is provided to attenuate brief disturbances which might otherwise deprime the print head.
- the compliant chamber comprises a flexible membrane 50 which is capable of movement in the direction shown by the arrows 52 in an amount sufficient to absorb ink pressure disturbances in the supply line through the print head so as to prevent depriming of the head.
- the membrane 50 is held in place between a stainless steel member 54 and a filter assembly 56.
- the stainless steel member 54 is in turn held in place between the membrane 50 and another gasket 58.
- a vent hole 60 is provided in the print head juxtaposed to the membrane 50 so as to allow air to escape which is displaced by the membrane 50.
- the filter assembly 66 includes a filter 62. As will be appreciated with reference to Figs. 1-4, ink is free to flow into the compliant chamber 49 from an inlet 66 on the membrane side of the filter 62.
- the membrane displacement be non-linear with respect to changes in pressure.
- the membrane 50 is shown as concave with respect to the interior of the chamber 49 such that resistance to deformation increases concavity of the diaphragm. In other words, deformation of the diaphragm is non-linear with respect to changes in pressure within the compliant chamber.
- the inlet 66 of the print head is supplied with ink through a flexible tube 70 leading to a reservoir 72.
- the reservoir 72 as shown is including another filter 74 to assure that no agglomerations in the ink greater than the filler rating pass into the print head 10.
- the level of ink 76 in the reservoir 72 is maintained below the height of the ink jet chamber 14 so as to assure that no ink pressure at the chamber 16 thus avoiding weeping of ink from the orifices 15 in the orifice plate 14.
- Fig. 8 wherein an electrical circuit is shown which is equivalent to the fluidic circuit of the ink jet apparatus shown in Fig. 1.
- the apparatus shown in Fig. 1 is depicted in equivalent electrical circuit form using capacitance, resistance and inductance and a pressure disturbance equivalent to a voltage pulse being simulated by a pulse generator.
- the equivalent circuit shown in Fig. 1 comprises a capacitance 80 and a resistance 82 corresponding to the capacitance and resistance of the orifice 15 in the orifice plate 14 respectively.
- a resistance 84 corresponds to the resistance of the restrictor 24.
- a capacitance 86 and a resistance 88 correspond to the fluidic capacitance and resistance of the manifold 30 including the feed lines 46.
- a capacitance 90 corresponds to the fluidic capacitance of the compliant chamber.
- a resistance 92 and a resistance 94 correspond to the fluidic resistance of the feed line 72 while an inductance 96 and an inductance 98 correspond to the fluidic inductance of that feed line 72.
- a capacitance 102 corresponds to the fluidic capacitance of the reservoir 72 and a voltage source 104 corresponds to the fluidic voltage or pressure generated by the reservoir 72. Any pressure disturbance in the feed line which is of a nature which could otherwise deprime the ink jet is depicted by a signal generator 106 located between the resistances 92 and 94 and the inductances 96 and 98 of the feed line.
- a first low pass filter is provided by sub-circuit 108 comprising the fluidic capacitance 80 and the fluidic resistances 82 and 84.
- a second sub-circuit 110 comprises fluidic capacitance 86 and fluidic resistance 88.
- a third sub-circuit 112 comprises fluidic capacitance 90 of the compliant chamber and fluidic resistance 92 which is part of the feed line 70 resistance.
- each of the sub-circuits 108, 110 and 112 effectively form a classic first order low pass filter where v i (t) is an input voltage corresponding to the disturbance in the feed line and the v o (t) is the output voltage.
- the output voltage v o (t) corresponding to the output effect of the pressure disturbance represented by the v i (t) may be severely attenuated if the duration of the disturbance is less than the time constant T corresponding to the product RC.
- disturbances which are sufficiently brief in time will be severely attenuated by the low pass filter represented by the sub-circuit 112 corresponding to the low pass filter represented by the RC combination of the compliant chamber capacitance 90 and the line resistance 92. More specifically, disturbances having a duration shorter than 10% of T equal to the product of RC will be sufficiently attenuated so as not to have any material affect on the operation of the print head: i . e ., will not deprime the print head or cause weeping through the orifices.
- the flexible membrane is chosen so as to produce a time constant T of at least .1 second and preferably more than .5 seconds such that disturbances less than 1/10 or 10% of the time constant T will be substantially attenuated by the low pass filter formed by the compliant chamber in conjunction with the feed line resistance. More specifically, for a time constant of .1 seconds, the disturbance of less than .01 seconds or less than 1/10 or 10% of .1 seconds will have no effect on depriming or weeping. Similarly, for a time constant of at least .5 seconds, a disturbance of .05 seconds in duration will have little or no effect on depriming or weeping. It should be understood that in order for the compliant chamber to function as part of a low pass filter to serve the foregoing purpose, it is important that the compliant chamber be large enough to handle the volumetric disturbance without an undue increase in pressure.
- the check valves 32 will only prevent depriming in gross overpressure situations where they are useful in preventing back flow of ink.
- very small pressure changes which would otherwise produce depriming will not have that effect where the compliant chamber is utilized to provide the low pass filter characteristic.
- the check valves do tend to pressurize the manifold section and prevent an unobjectionable massive deprime at the expense of some slightly objectionable orifice weeping.
- the compliant chamber may take on different shapes and sizes.
- the flexible membrane may take on a different shape although it is preferred that the membrane provide a non-linear change in deformation with respect to changes in pressure.
- Fluids other than ink may be utilized where the fluidic jets are used, for example, as meters.
- alternative ink jet configurations may be utilized where different types of transducers are used including the ink itself as in a bubble jet.
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Ink Jet (AREA)
- Insulators (AREA)
- Surgical Instruments (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Claims (13)
- Impulsfluidstrahlvorrichtung, aufweisend:einen Wandler (18);eine Fluidstrahlkammer (16), die mit dem Wandler (18) gekoppelt ist und eine Öffnung (15) zum Ausstoßen von Tröpfchen als Antwort auf die Erregung des Wandlers (18) aufweist;eine Fluidzufuhr (66, 70, 72), die mit der Fluidstrahlkammer (16) durch eine nachgiebige Kammer (49) gekoppelt ist, die die Druckstörungen in der Fluidzufuhr (66, 70, 72) abschwächt;
gekennzeichnet durchmindestens ein Rückschlagventil (32), das zwischen der nachgiebigen Kammer (49) und der Fluidstrahlkammer (16) oder einem Verteiler (30) der eine Vielzahl von Fluidstrahlkammern (16) versorgt, angeordnet ist, um einen umgekehrten Fluidstrom von der Fluidstrahlkammer (16) oder dem Verteiler (30) zur nachgiebigen Kammer (49) zu verhindern, während ein Fluidstrom von der nachgiebigen Kammer (49) zur Fluidstrahlkammer (16) oder dem Verteiler (30) erlaubt wird. - Impulsfluidstrahlvorrichtung nach Anspruch 1, wobei die Zeitkonstante, die durch das Produkt der Fluidkapazität der nachgiebigen Kammer (49) und mindestens einen Teil des Widerstandes der Fluidversorgung (66, 70, 72) dargestellt wird, Druckstörungen, die eine Dauer von weniger als 10% der durch das Produkt dargestellten Zeitkonstante haben, wesentlich abschwächt.
- Impulsfluidstrahlvorrichtung nach Anspruch 1, wobei Druckstörungen, die eine Dauer von wesentlich weniger als 0,01 Sekunden haben, wesentlich abgeschwächt werden.
- Impulsfluidstrahlvorrichtung nach Anspruch 1, wobei Druckstörungen mit einer Dauer von weniger als 0,05 Sekunden wesentlich abgeschwächt werden.
- Impulsfluidstrahlvorrichtung nach einem der vorhergehenden Ansprüche, wobei die nachgiebige Kammer (49) ein nachgiebiges Element (50) aufweist, welches durch nicht lineare Deformation in Bezug auf Druckänderungen gekennzeichnet ist.
- Impulsfluidstrahlvorrichtung nach einem der vorhergehenden Ansprüche, wobei die nachgiebige Kammer (49) ein flexibles Diaphragma (50) aufweist, welches in der undeformierten Position nicht planar ist.
- Impulsfluidstrahlvorrichtung nach Anspruch 6, wobei die nachgiebige Kammer (49) ferner einen Fluidströmungsweg in Kombination mit dem flexiblen Diaphragma (50) aufweist, welches Druckstörungen abschwächt; während es Tinte erlaubt, ohne wesentliche Druckerhöhung durch den Weg zu strömen.
- Impulsfluidstrahlvorrichtung nach Anspruch 7, wobei die nachgiebige Kammer (49) ferner einen Luftdurchgang (60) aufweist, um es Luft zu erlauben, hindurch zu strömen und das flexible Diaphragma (50) zu erreichen.
- Vorrichtung nach Anspruch 1, wobei das Rückschlagventil (32) einen Ventilsitz (36), ein Ventilelement und einen Ventilträger (40) aufweist, der mindestens einen Fluiddurchgang (42) aufweist, der es Fluid erlaubt, zwischen dem Ventilsitz (36) und dem Ventilelement und durch den Fluiddurchgang (42) zu der Fluidstrahlkammer (16) oder dem Verteiler (30) hin zu strömen.
- Vorrichtung nach Anspruch 9, wobei das Rückschlagventil (32) einen Ventilkörper aufweist, der den Ventilsitz (36) einschließt, und das Ventilelement und den Ventilträger (40) so enthält, dass der Fluiddurchgang (42) in dem Ventilträger (40) zum Ventilkörper benachbart angeordnet ist.
- Vorrichtung nach Anspruch 10, wobei der Ventilträger (40) eine Vielzahl von Luftdurchgängen aufweist, die zum Ventilkörper benachbart angeordnet sind.
- Vorrichtung nach einem der vorhergehenden Ansprüche, wobei die nachgiebige Kammer (49) einen Fluiddurchgang und ein nachgiebiges Element (50) aufweist, um Druckwellen zu absorbieren, während sie erlaubt, dass Tinte durch den Tintendurchgang fließt.
- Vorrichtung nach Anspruch 12, wobei die nachgiebige Kammer (49) einen Luftdurchgang (60) aufweist, um Luft hindurch strömen und das nachgiebige Element (50) erreichen zu lassen.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US82875897A | 1997-03-25 | 1997-03-25 | |
US828758 | 1997-03-25 | ||
PCT/US1998/005420 WO1998043050A1 (en) | 1997-03-25 | 1998-03-20 | Impulse fluid jet apparatus with depriming protection |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0970350A1 EP0970350A1 (de) | 2000-01-12 |
EP0970350A4 EP0970350A4 (de) | 2001-03-07 |
EP0970350B1 true EP0970350B1 (de) | 2005-06-08 |
Family
ID=25252666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98911836A Expired - Lifetime EP0970350B1 (de) | 1997-03-25 | 1998-03-20 | Impulstintenstrahlgerät mit unterdruckschutz |
Country Status (9)
Country | Link |
---|---|
EP (1) | EP0970350B1 (de) |
JP (1) | JP2001519039A (de) |
AU (1) | AU741027B2 (de) |
CA (1) | CA2283666C (de) |
DE (1) | DE69830481T2 (de) |
ES (1) | ES2242998T3 (de) |
IL (1) | IL131910A0 (de) |
NO (1) | NO994644D0 (de) |
WO (1) | WO1998043050A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107548360A (zh) * | 2015-07-14 | 2018-01-05 | 惠普发展公司,有限责任合伙企业 | 可喷射材料喷发腔室的止回阀 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6209997B1 (en) * | 1997-03-25 | 2001-04-03 | Illinois Tool Works Inc. | Impulse fluid jet apparatus with depriming protection |
US6394589B1 (en) | 1999-12-01 | 2002-05-28 | Hitachi Koki Co., Ltd. | Ink jet printhead with reduced crosstalk |
US20080129810A1 (en) * | 2006-12-01 | 2008-06-05 | Illinois Tool Works, Inc. | Compliant chamber with check valve and internal energy absorbing element for inkjet printhead |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2311383C2 (de) * | 1973-03-08 | 1975-04-30 | Olympia Werke Ag, 2940 Wilhelmshaven | Anordnung zum Reduzieren von Druckanstiegen und -abfallen in der Schreibflüssigkeit eines Tintenspritz-Schreibwerkes |
JPS5574885A (en) * | 1978-11-30 | 1980-06-05 | Sharp Corp | Liquid feeder |
US4514742A (en) * | 1980-06-16 | 1985-04-30 | Nippon Electric Co., Ltd. | Printer head for an ink-on-demand type ink-jet printer |
US4347524A (en) * | 1980-08-07 | 1982-08-31 | Hewlett-Packard Company | Apparatus for absorbing shocks to the ink supply of an ink jet printer |
JPS57156262A (en) * | 1981-03-19 | 1982-09-27 | Sanyo Electric Co Ltd | Ink jet type recording device |
JPS58131071A (ja) * | 1982-01-25 | 1983-08-04 | Konishiroku Photo Ind Co Ltd | インクジエツト記録装置 |
DE3209947C1 (de) * | 1982-03-18 | 1983-12-15 | Siemens AG, 1000 Berlin und 8000 München | Vorrichtung zur Entlüftung und zur Dämpfung von Druckschwankungen in einem Tintenschreibkopf |
IT1157119B (it) * | 1982-12-03 | 1987-02-11 | Olivetti & Co Spa | Dispositivo stampante a getto di inchiostro |
US4575738A (en) * | 1984-07-20 | 1986-03-11 | Tektronix, Inc. | Ink jet printing apparatus having an ink pressure transient suppressor system |
JPH01257058A (ja) * | 1988-04-07 | 1989-10-13 | Seiko Epson Corp | インクジェットヘッド |
US5650811A (en) * | 1993-05-21 | 1997-07-22 | Hewlett-Packard Company | Apparatus for providing ink to a printhead |
-
1998
- 1998-03-20 WO PCT/US1998/005420 patent/WO1998043050A1/en active IP Right Grant
- 1998-03-20 AU AU65700/98A patent/AU741027B2/en not_active Ceased
- 1998-03-20 EP EP98911836A patent/EP0970350B1/de not_active Expired - Lifetime
- 1998-03-20 ES ES98911836T patent/ES2242998T3/es not_active Expired - Lifetime
- 1998-03-20 IL IL13191098A patent/IL131910A0/xx unknown
- 1998-03-20 DE DE69830481T patent/DE69830481T2/de not_active Expired - Lifetime
- 1998-03-20 CA CA002283666A patent/CA2283666C/en not_active Expired - Fee Related
- 1998-03-20 JP JP54580798A patent/JP2001519039A/ja not_active Ceased
-
1999
- 1999-09-24 NO NO994644A patent/NO994644D0/no unknown
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107548360A (zh) * | 2015-07-14 | 2018-01-05 | 惠普发展公司,有限责任合伙企业 | 可喷射材料喷发腔室的止回阀 |
Also Published As
Publication number | Publication date |
---|---|
CA2283666C (en) | 2006-08-15 |
ES2242998T3 (es) | 2005-11-16 |
CA2283666A1 (en) | 1998-10-01 |
DE69830481T2 (de) | 2005-11-03 |
EP0970350A1 (de) | 2000-01-12 |
EP0970350A4 (de) | 2001-03-07 |
WO1998043050A1 (en) | 1998-10-01 |
DE69830481D1 (de) | 2005-07-14 |
AU741027B2 (en) | 2001-11-22 |
IL131910A0 (en) | 2001-03-19 |
NO994644L (no) | 1999-09-24 |
NO994644D0 (no) | 1999-09-24 |
JP2001519039A (ja) | 2001-10-16 |
AU6570098A (en) | 1998-10-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
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