GB1569425A - Liquid drop generator - Google Patents
Liquid drop generator Download PDFInfo
- Publication number
- GB1569425A GB1569425A GB1501/77A GB150177A GB1569425A GB 1569425 A GB1569425 A GB 1569425A GB 1501/77 A GB1501/77 A GB 1501/77A GB 150177 A GB150177 A GB 150177A GB 1569425 A GB1569425 A GB 1569425A
- Authority
- GB
- United Kingdom
- Prior art keywords
- chamber
- diaphragm
- liquid
- orifice
- unit
- 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
Links
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
- B41J2/135—Nozzles
- B41J2/145—Arrangement thereof
- B41J2/155—Arrangement thereof for line printing
-
- 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
- B41J2/14201—Structure of print heads with piezoelectric elements
- B41J2/14298—Structure of print heads with piezoelectric elements of disc type
-
- 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
- B41J2002/041—Electromagnetic transducer
-
- 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
- B41J2002/14338—Multiple pressure elements per ink chamber
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Description
(54) LIQUID DROP GENERATOR
(71) We, XEROX CORPORATION, a corporation organised under the laws of the
State of New York, United States of America, of Rochester, New York 14644, United States of America, do hereby declare the invention, for which we pray that a patent may be granted to us, and the method by which it is to be performed, to be particularly described in and by the following statement:
This invention relates to liquid drop generators such as ink jet assemblies.
In an ink jet assembly wherein ink droplets are expressed from a chamber by selectively increasing the pressure therein, the means for increasing the pressure in the chamber may be piezoelectric or magnetostrictive actuators. The actuators are normally premanently secured to the ink jet assembly requiring new actuators each time an assembly must be replaced. The actuators comprise a substantial proportion of the cost of the assembly. Therefore, if the actuators are reusable so they may be used with replacement assemblies, a substantial savings can be achieved. A proposal for reusable actuators for ink jet assemblies is given in U.S.
Patent 3,864,685.
The present invention is concerned with providing improved liquid drop generators having reusable actuators. The structure and operation of such generators differs from that described in U.S. Patent 3,864,685.
According to the invention there is provided a liquid drop generator comprising a liquid jet instrument for holding a liquid supply and a drive unit for expressing liquid drops from said instrument, said liquid jet instrument being releasably secured to said drive unit and comprising a nozzle assembly, a chamber housing operatively associated with the nozzle assembly, means enabling the supply of liquid to said housing, said housing having a plurality of separate chambers, each chamber having an opening therethrough, and elastic diaphragm means sealing the chamber openings, the nozzle assembly having a plurality of outlet orifices from which liquid drops are expressed, each outlet orifice being in operative communication with at least one of the chambers, and said drive unit comprising a carrier member provided with a plurality of means for applying pressure pulses to said diaphragm means, said carrier member maintaining each pressure pulse applying means in operative association with the diaphragm means at a respective one of the chambers.
There is also provided according to the invention a liquid drop generator comprising a liquid jet instrument for holding a liquid supply and a drive unit for expressing liquid drops from said instrument, said liquid jet instrument being releasably secured to said drive unit and comprising a nozzle assembly, a chamber housing operatively associated with the nozzle assembly, means enabling the supply of liquid to said housing, said housing having a chamber which has an opening therethrough, and an elastic diaphragm means sealing the opening of the chamber, the nozzle assembly having at least one outlet orifice in operative communication with the chamber and from which liquid drops are expressed, and the drive unit comprising a carrier member provided with means for applying pressure pulses to said diaphragm means, said carrier member maintaining the pressure pulse applying means in operative association with the diaphragm means at the chamber.
Preferred features of the invention will be described with reference to the accompanying drawings wherein:
Figure 1 is a perspective view of a multiple ink jet printing system which includes an ink jet assembly according to the invention;
Figure 2 is a section view of a portion of a piezoelectric driver bar employed in the apparatus shown in Figure 1;
Figure 3 is a view taken along section line 3-3 of Figure 1;
Figure 4 is a view taken along section line 4-4 of Figure 1;
Figure 5 is a top view of a coincidence ink jet unit according to the invention;
Figure 6 is a bottom view of the coincident ink jet unit of Figure 5;
Figure 7 is a view taken along section line 7-7 of Figure 5;
Figure 8 is a front view of the unit of Figures 5-7 illustrating piezoelectric drivers releasably attached thereto;;
Figure 9 is a perspective view of a multiple ink jet printing system having magnetic driver means;
Figure 10 is a view taken along section line 22-22 of Figure 9; and
Figure 11 is a view taken along section line 33-33 of Figure 9.
Referring to Figures 1-4, a multiple ink jet assembly is arranged opposite a rotating recording medium 12 for depositing ink droplets thereon. The assembly comprises a driver unit 14 releasably secured to an ink jet instrument unit 10. The instrument 10 comprises an elongated plastic or ceramic chamber unit 16, a plastic or ceramic multiple nozzle unit 18 attached to the front of the chamber unit 16 and a plastic or ceramic manifold reservoir unit 19 attached to the rear of the chamber unit. The chamber unit has a plurality of rectangularly shaped chambers 20 separated by side walls 21 projecting upwards from a bottom wall 22. An elastic thin diaphragm 24 spans the chamber body and is sealed to the upper edge of each wall 22 to form an outer wall of the chamber body. The elastic diaphragm 24 comprises an elastic material, such as stainless steel, glass or nickel.
The driver unit 14 comprises an electrically conductive elastic metallic web 26, a plurality of longitudinally spaced piezoelectric ceramic members 28 bonded to the web 26, a plurality of electrodes 30 bonded to a respective one of the piezoelectric members 28 and a ceramic or plastic carrier bar 32. The piezoelectric members 28 and the electrodes 30 are circular in the preferred mode but may be square or rectangular. The piezoelectric member 28 is polarized during the manufacture thereof to contract in a radial direction. A plurality of electrical leads 34 are each connected to a respective electrode 30 and an electrical lead 36 is connected to the web 26. The leads 34 and 36 are connected to electrical drivers (not shown) so that the electrode 30 for each piezoelectric member may be separately addressed.The carrier bar 32 includes a plurality of cylindrical cavities 38, each of which has a ridge 40 on the closed end wall 41 thereof. The ridge 40 circumscribes a circle on the wall 41. The surface of the ridge is located a distance "d" from the face 42 of the carrier bar 32, which is less than the combined thickness "t" of the piezoelectric member 28 and electrode 30. The metal web 26 is bonded by any well-known adhesive to the portions of the face 42 of the carrier bar, which are located between the cavities 38 in such a manner to press the electrode 30 into engagement with the ridge 40. Due to the difference in the combined thickness "t" of the piezoelectric member 28 and electrode 30 and the distance "d" between the face 42 and the ridge 40, the web 26 will be slightly deformed when the web 26 is bonded to the carrier bar 32.
A flange 44 is provided on each longitudinal end of the carrier bar 14, and a complementary flange 46 is provided on each longitudinal end of the chamber housing. The carrier bar 14 and the chamber housing 16 are assembled together and attached to longitudinally spaced support flanges 48 (only one shown), located adjacent each longitudinal end thereof, by a bolt 50 and nut 52 assembly. The degree of deformation of the web 26, due to the protrusion of the piezoelectric member 28 beyond the face 42, is such that the diaphragm 24 will be slightly stressed when carrier bar 14 and the chamber housing 16 are assembled together to assure that the diaphragm wall 24 conforms to the shape of the deformed web 26 in a normal position.Upon applying a voltage across the piezoelectric member 28, the piezoelectric member 28 will deform causing the diaphragm 24 to similarly deform to decrease the volume of the chamber 20 to express an ink droplet therefrom. Upon termination of the voltage application, the diaphragm 24 returns to its normal position due to the elasticity thereof to restore the liquid volume of the chamber 20.
The multiple nozzle unit 18 is of thin plastic wall construction and comprises a plurality of ink jet droplet orifices 54 separated by a wall therebetween. The nozzle unit has a plurality of spaced ledges 55 which are sealed to the front portion of the diaphragm 24. The nozzle unit is also sealed to the walls 21 and the bottom wall 22 with one orifice being communicated with one chamber.
The manifold ink reservoir unit 19 is also of thin plastic wall construction and has a plurality of spaced ledges 57 which are sealed to the back edge of the diaphragm 24. The reservoir unit is also sealed to the walls 21 and the bottom wall 22 and is communicated to the individual chambers 20 through a plurality of orifices 56. The reservoir orifice 56 is more restrictive to flow from the chamber than the droplet orifice 54 whereupon pressure developed in the chamber 20, due to deformation of the diaphragm 24, will express a droplet from the nozzle orifice 54 rather than force fluid back to the reservoir through orifice 56. Upon relaxation of the diaphragm, fluid from the reservoir will replace the ink expressed from chamber 20. A primary reservoir 58 supplies the manifold reservoir through a conduit 60 and may be kept at a pressure of about 6 inches of liquid.
In operation, a voltage is selectively applied to the piezoelectric member 28 of various selected chambers to cause deformation of the diaphragm 24 thereat to express ink droplets from the nozzle orifice 54 associated therewith. Ink droplets will be deposited on the recording medium, in accordance with a desired image, as the recording medium 12 rotates past the ink jet assembly unit 2.
When it is desired to replace the instrument 10, the assembly 2 is removed from the support flange 48, the instrument 10 replaced and the assembly of the new instrument and old driver unit secured to the support flange 48. The piezoelectric members are usable with a number of ink jet assemblies saving the cost of providing new piezoelectric members for each new assembly.
Referring to Figures 5-7, there is illustrated a coincidence ink jet assembly to which the principle of this invention may also apply. A coincidence jet assembly is the subject matter of
U.S. Patent No. 4,104,645 and comprises two liquid ink pressure passages and a droplet outlet orifice. Each of the pressure passages is communicated to a respective pressure chamber. An ink droplet is expressed from the outlet orifice only when the liquid in both the pressure passages has a simultaneous increase in pressure.
Referring to Figure 7, there is illustrated a section view of an ink jet instrument housing 100, which includes a pair of circular pressure chambers 101 and 102. Main fluid pressure passages 104 and 105 lead from the chambers 101, 102, respectively, to pressure inlet passages 106, 107. which lead to a liquid ink supply passage 108 where the three passages intersect. The liquid ink supply passage 108 branches off from two parallel main supply passages 110 and 112, which, in turn, are joined at one end inside the housing by a cross-passage 114 and at the other end by an external C-shaped tubular fitting 116. A flexible bag ink reservoir 120 is communicated to the tubular fitting 116 by a conduit 122. Also, at the intersection is an outlet orifice 124 through which ink droplets 126 are expressed onto a copy medium.
The chambers 101 and 102 are each sealed by a respective elastic diaphragm 128, which is secured to the housing 100 by a suitable adhesive. The chambers and passages are entirely filled with liquid. When the diaphragm 128 for either chamber 101 or 102 is deformed, a pressure increase will occur in that particular chamber causing displacement of ink in a respective one of passages 106 and 107.
The relationship between the above described chambers, passages and the droplet outlet orifice is now described for an understanding of a coincidence ink jet principle. The passages
106 and 107 are at such an angle relative to the orifice 124, the impedance to liquid flow in passage 108 relative to the impedance to liquid flow in orifice 124, and the magnitude and duration of a pressure increase exerted on the liquid in the pressure chambers 101, 102 are designed that the ink stream expressed from only one passage at a time will entirely miss orifice 124 and displace the ink in the ink supply passage 108, while the ink within orifice 124 will not be disturbed to the extent of expressing a droplet therethrough.The orifice 124 is so located relative to the intersection of the passages 106, 107 and the magnitude and duration
of the pressure increase exerted on the liquid in the pressure chambers 101, 102 are so
designed that the summation vector of the fluid momentum vectors in passages 106 and 107
will lie on the axis of the orifice 124. Thus, only when the diaphragm 128 for both pressure
chambers 101, 102 is simultaneously deformed, thereby applying a simultaneous pressure
increase in the liquid in each of passages 106, 107, will an ink droplet 126 be expressed from
orifice 124.
The aforedescribed coincidence ink jet principle has specific utilization in a matrix actua
tion system where a large number of jets or a dense linear jet array is employed since
substantially fewer pressure chambers than the number of jets utilized are required. Theoret ically. since two independent pressure chambers are required to effect expression of an ink
droplet through a jet, the number of pressure chambers required in a matrix actuation system
is twice the square root of the number of jets. For example, theoretically, only 120 pressure
chambers are needed for 3600 jets. Each jet orifice is communicated to two pressure
chambers. However, as the number of jets increases in a system, the number of jets communi
cated to one pressure chamber will be hydraulically limited and, therefore, more pressure
chambers may be required.For instance. the practical number of pressure chambers for a
3600-jet instrument may range between 120 and 400. In this instance, a housing would be
provided with a plurality of pressure chambers, each serving a number of ink jets. The
embodiment of Figures 5-7 illustrates a nine-jet, six-pressure chamber ink jet instrument.
Each orifice 130, 132, 134, 136. 138, 140, 142 and 144 has pressure inlet passages 106, 107
and a fluid supply passage 108 communicated to it in exactly the same manner as described
for orifice 124. The pressure chambers 146, 148, 150 and 152 are the same as chambers 101 and 102 and each is sealed by separate diaphragms 128. For clarity, Figure 5 illustrates fluid passages between only the chambers 101, 146 and 148 and their respective ink jet orifices; and Figure 6 illustrates the fluid passages between only the chambers 102, 150 and 152 and their respective ink jet orifices. Also, some of the passages are cross-hatched and filled with dots for clarity in showing separate passages.Chamber 101 is communicated to the jets 124, 134 and 140 by main passage 104; chamber 146 is communicated to the jets 130, 136 and 142 by passage 154; and chamber 148 is communicated to jets 132, 138 and 142 by passage 156.
Chamber 102 is communicated to jets 124, 130 and 132 by passage 105; chamber 150 is communicated to jets 134, 136 and 138 by passage 158; and chamber 152 is communicated to jets 140, 142 and 144 by passage 160. The following table shows which jets express droplets therefrom when particular chambers are pressurized:
Chambers Droplet
Simultaneously Pressurized Expressed From Jet
102, 101 124
102, 146 130
102, 148 132
150, 101 134
150, 146 136
150, 148 138
152, 101 140
152, 146 142
152, 148 144
Referring to Figures 7 and 8, a pair of driver units 162, 164 is removably secured to a
stationary support 186. Each driver unit is constructed in the same manner as driver unit 14
with a piezoelectric member 168 for each chamber disposed in a respective cavity 170 of a
carrier bar 172.An elastic metallic web 171 is bonded to each piezoelectric member and the
carrier bar 172 and engages each diaphragm 128 to exert a slight stress thereon. Electrically
insulated lead wires 174 are connected to a respective thin electrically conductive metallic
plate 176 bonded to the piezoelectric member 168. An electrically insulated lead 178 is
connected to the web 171. A plurality of electronic drivers are electrically connected to a
respective one of lead wires 174 and 178 to selectively apply a voltage across a selected
piezoelectric member 168. When an ink droplet is desired through a particular orifice, a
voltage is applied across the piezoelectric members corresponding to the particular two
chambers which need to be pressurized to express a droplet through such orifice.When a
voltage is applied to a piezoelectric member, deformation of the piezoelectric member will
cause the diaphragm 128 to deform resulting in decreasing the volume of its respective
pressure chamber and increasing the pressure therein. The liquid droplet instrument is
sandwiched between the driver units 162 and 164, which have flanges 180 at the longitudinal
ends thereof. A bolt 182 extends through the flanges and a support flange 184 to secure the
ink jet assembly to astationary support structure 186. When itis desired to replace the ink jet
instrument with a new one, the drivers 162 and 164 are removed from the support flange 184,
housing 100 removed and replaced with a new one and the drivers resecured to the support
flange 184. Thus, the piezoelectric members are usable with a number of ink jet instruments
saving the cost of providing new piezoelectric members for each new instrument.
The diaphragm 24 for the embodiment of Figures 1-4 spans the entire chamber housing.
There may be substituted therefor a plurality of diaphragms, one for each chamber. Similarly,
a continuous. diaphragm web may span the housing 100 to seal chambers 101, 146 and 148
and another continuous diaphragm web may seal the chambers 102, 150 and 152 rather than
employing separate diaphragms 128 for each chamber of the embodiment of Figures 5-8.
Referring to Figures 9 - 11, an alternative embodiment of this invention, ink jet instrument
unit 200 is arranged opposite a rotating recording medium 400 for depositing ink droplets thereon. A magnetic driver bar 100 is releasably secured to the ink jet instrument unit 200.
The instrument 200 comprises an elongated plastic or ceramic chamber unit 120, a plastic or ceramic multiple nozzle unit 140 attached to the front of the chamber unit 120 and a plastic or ceramic manifold reservour unit 150 attached to the rear of the chamber unit. The chamber unit has a plurality of chambers 160 separated by side walls 180 projecting upwards from a bottom wall 190. An elastic diaphragm 220 spans the chamber body and is sealed to the upper edge of each wall 180 to form an outer wall of the chamber body. The diaphragm 220 comprises two laminated layers 222, 224 of different materials which have significantly different strain characteristics in the presence of a magnetic field, resulting in buckling of the diaphragm when such a field is applied thereto.An example of two such materials is nickel for layer 222 and an iron cobalt nickel alloy, such as Supermendur, for layer 224. The change in length, relative to its original length, is substantially greater for Supermendur than for nickel at any given magnetizing force. When buckling or deformation of the diaphragm occurs, the
Supermendur layer will form the longest surface (convex surface of the ribbon in the buckling direction and the nickel layer will form the shortest surface concave surface) of the ribbon in the buckling direction.
The magnetic driver 100 is secured to a stationary support member 226 by bolts 228 which extend through longitudinally spaced flanges 229. The driver is made of a material which is highly permeable to magnetic fields but of low electrical conductivity to minimize eddy current losses. Such materials may comprise a class of materials known as ferrites. The driver 100 includes a plurality of legs 230, adjacent pairs of which embrace a respective chamber 160 to form horsehoe magnets. A plurality of electrically insulated conductors 232 are wrapped in a coil around a respective one of the sections 234 of the driver, which are located between each leg 230. The coiled conductors are connected to electrical drivers (not shown) so that each coil may be separately addressed.When current is passed through the coiled conductors 232, the magnetic field lines will be generated along the axis of the coil or in the longitudinal direction. The magentic field lines will be isolated within a respective chamber are so only the corresponding diaphragm section is stressed when current is passed through a particular coil. The stress on the diaphragm 200 exerted by the magnetic field will be in a direction parallel to the direction of the magnetic field lines; thus in a longitudinal direction.
Referring to Figure 10, the stress exerted on the diaphragm will cause an unequal strain on layers 222 and 224 thereby effecting buckling of the diaphragm in the longitudinal direction with the convex or longest surface 224 thereof facing the interior of the chamber 160, resulting in decreasing the volume of the chamber to express an ink droplet therefrom.
The multiple nozzle unit 140 of thin plastic wall construction and comprises a plurality of ink jet droplet orifices 238 separated by a wall therebetween. The nozzle unit has a plurality of spaced ledges 239 which are sealed to the front edge of the diaphragm 220. The nozzle unit is also sealed to the walls 180 and the bottom wall 190 with one orifice being communicated with one chamber.
The manifold ink reservoir unit 150 is also of thin plastic wall construction and has a plurality of spaced ledges 241 sealed to the back edge of the diaphragm 220. The reservoir unit 150 is also sealed to the walls 180 and the bottom wall 190 and is communicated to the individual chambers 160 through a plurality of orifices 240. The reservoir orifice 240 is more restrictive to flow from the chamber than the droplet orifice 238 whereupon pressure developed in the chamber 160, due to deformation of the diaphragm 220, will express a droplet from the nozzle orifice 238 rather than force fluid back to the reservoir through orifice 240. Upon relaxation of the diaphragm fluid from the reservoir will replace the ink expressed from chamber 160. A primary reservoir 242 supplies the manifold reservoir through conduit 244 and may be kept at a pressure of about 6 inches of liquid.
The liquid droplet instrument 200 is releasably connected to the magnetic unit by magnetic attraction between the horseshoe magnets and the diaphragm 220. However, additional appropriate connecting means can also be provided for releasably securing the instrument to the magnetic driver unit. Thus, the instrument 200 may be removed from the driver 100 and replaced allowing the same driver to be used with a number of instruments.
In operation, current is selectively passed through the coiled conductors 232 of various selected chambers to cause deformation of the diaphragm 220 thereof to express ink droplets from the nozzle orifice 238 associated therewith to deposit ink droplets on the recording medium, in accordance with a desired image, as the recording medium 400 rotates therepast.
While the described embodiments of the invention have a multiple orifice nozzle assembly associated with a plurality of chambers, it is possible to apply the invention ot a liquid drop generator including a nozzle assembly having a single outlet orifice, which orifice is in operative communication with a single chamber having an opening sealed by the pulse operable diaphragm means.
WHAT WE CLAIM IS:
1. A liquid drop generator comprising a liquid jet instrument for holding a liquid supply
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (15)
1. A liquid drop generator comprising a liquid jet instrument for holding a liquid supply
and a drive unit for expressing liquid drops from said instrument, said liquid jet instrument being releasably secured to said drive unit and comprising a nozzle assembly, a chamber housing operatively associated with the nozzle assembly, means enabling the supply of liquid to said housing, said housing having a plurality of separate chambers, each chamber having an opening therethrough, and elastic diaphragm means sealing the chamber openings, the nozzle assembly having a plurality of outlet orifices from which liquid drops are expressed, each outlet orifice being in operative communication with at least one of the chambers, and said drive unit comprising a carrier member provided with a plurality of means for applying pressure pulses to said diaphragm means, said carrier member maintaining each pressure pulse applying means in operative association with the diaphragm means at a respective one of the chambers.
2. A liquid drop generator according to claim 1 wherein the diaphragm means comprises a plurality of separate diaphragms, one being provided to seal each chamber opening.
3. A liquid drop generator according to claim 1 wherein the diaphragm means comprises an elastic web spanning two or more of said chamber openings, said elastic web constituting a common diaphragm for said two or more chamber openings.
4. A liquid drop generator according to any of claims 1 to 3 wherein the pressure pulse applying means includes piezoelectric members.
5. A liquid drop generator according to claim 4 wherein the piezoelectric members are supported on said carrier member by electrically conductive elastic web means bonded to said carrier member, said electrically conductive elastic web means being disposed face to face against said elastic diaphragm.
6. A liquid drop generator according to any of claims 1 to 3 wherein said diaphragm means is arranged to deform and reduce the volume of a chamber associated therewith upon the application of a magnetic field thereto and said pressure pulse applying means includes means for producing a said magnetic field.
7. A liquid drop generator according to claim 6 wherein said diaphragm means comprises laminated layers having significantly different strain characteristics in the presence of said magnetic field.
8. A liquid drop generator according to claim 6 or 7 wherein said carrier member comprises a plurality of horseshoe electro-magnets, one such magnet being associated with each chamber, and means for individually actuating any of said magnets as desired.
9. A liquid drop generator according to any of claims 1 to 8 wherein there is only one chamber in operative communication with each outlet orifice and liquid is expressed from said orifice when the volume of said chamber is reduced by application of a said pressure pulse to the diaphragm of said chamber.
10. A liquid drop generator according to any of claims 1 to 8 wherein there are two chambers in operative communication with each outlet orifice and liquid is expressed from said orifice only when the volume of each of said two chambers is simultaneously reduced by simultaneous application of pressure pulses to the diaphragms of said two chambers.
11. A liquid drop generator according to claim 10 wherein a group of said chambers opens onto one surface of said housing and another group of said chambers opens onto another surface of said housing, with separate portions of said drive units being located adjacent each said surface.
12. A liquid drop generator according to claim 11 wherein said surfaces are opposed.
13. A liquid drop generator according to any of claims 1 to 12 wherein said carrier member includes means for enabling said generator to be fixedly supported on a supporting structure.
14. A liquid drop generator comprising a liquid jet instrument for holding a liquid supply and a drive unit for expressing liquid drops from said instrument, said liquid jet instrument being releasably secured to said drive unit and comprising a nozzle assembly, a chamber housing operatively associated with the nozzle assembly, means enabling the supply of liquid to said housing, said housing having a chamber which has an opening therethrough, and an elastic diaphragm means sealing the opening of the chamber, the nozzle assembly having at least one outlet orifice in operative communication with the chamber and from which liquid drops are expressed, and the drive unit comprising a carrier member provided with means for applying pressure pulses to said diaphragm means, said carrier member maintaining the pressure pulse applying means in operative association with the diaphragm means at the chamber.
15. A liquid drop generator substantially as herein described with reference to Figures 1 to 4, 5 to 8, or 9 to 11 of the accompanying drawings.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64938176A | 1976-01-15 | 1976-01-15 | |
| US05/649,187 US4057807A (en) | 1976-01-15 | 1976-01-15 | Separable liquid droplet instrument and magnetic drivers therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1569425A true GB1569425A (en) | 1980-06-18 |
Family
ID=27095559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1501/77A Expired GB1569425A (en) | 1976-01-15 | 1977-01-14 | Liquid drop generator |
Country Status (6)
| Country | Link |
|---|---|
| JP (1) | JPS6026713B2 (en) |
| DE (1) | DE2700010A1 (en) |
| FR (1) | FR2338089A1 (en) |
| GB (1) | GB1569425A (en) |
| NL (1) | NL7700187A (en) |
| SE (1) | SE427778B (en) |
Cited By (31)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0999933A1 (en) * | 1997-07-15 | 2000-05-17 | Silverbrook Research Pty. Limited | Magnetic-field-acutated ink jet nozzle |
| US6786574B2 (en) | 1997-07-15 | 2004-09-07 | Silverbrook Research Pty Ltd | Micro-electromechanical fluid ejection device having a chamber that is volumetrically altered for fluid ejection |
| US6824252B2 (en) | 1997-07-15 | 2004-11-30 | Silverbrook Research Pty Ltd | Micro-electromechanical fluid ejection device having a nozzle guard |
| US6986202B2 (en) | 1997-07-15 | 2006-01-17 | Silverbrook Research Pty Ltd. | Method of fabricating a micro-electromechanical fluid ejection device |
| US7066575B2 (en) | 1997-07-15 | 2006-06-27 | Silverbrook Research Pty Ltd | Micro-electromechanical fluid ejection device having a buckle-resistant actuator |
| US7125103B2 (en) | 1997-07-15 | 2006-10-24 | Silverbrook Research Pty Ltd | Fluid ejection device with a through-chip micro-electromechanical actuator |
| US7219982B2 (en) | 1997-07-15 | 2007-05-22 | Silverbrook Research Pty Ltd | Printer nozzle for ejecting ink |
| US7234795B2 (en) | 1997-07-15 | 2007-06-26 | Silverbrook Research Pty Ltd | Inkjet nozzle with CMOS compatible actuator voltage |
| US7293855B2 (en) | 1997-07-15 | 2007-11-13 | Silverbrook Research Pty Ltd | Inkjet nozzle with ink supply channel parallel to drop trajectory |
| US7328975B2 (en) | 1997-07-15 | 2008-02-12 | Silverbrook Research Pty Ltd | Injet printhead with thermal bend arm exposed to ink flow |
| US7334874B2 (en) | 1997-07-15 | 2008-02-26 | Silverbrook Research Pty Ltd | Inkjet nozzle chamber with electrostatically attracted plates |
| US7360871B2 (en) | 1997-07-15 | 2008-04-22 | Silverbrook Research Pty Ltd | Inkjet chamber with ejection actuator between inlet and nozzle |
| US7393083B2 (en) | 1997-07-15 | 2008-07-01 | Silverbrook Research Pty Ltd | Inkjet printer with low nozzle to chamber cross-section ratio |
| AU2006202037B2 (en) * | 1997-07-15 | 2008-07-03 | Zamtec Limited | Inkjet printer with magnetic piston actuator |
| US7401884B2 (en) | 1997-07-15 | 2008-07-22 | Silverbrook Research Pty Ltd | Inkjet printhead with integral nozzle plate |
| US7410250B2 (en) | 1997-07-15 | 2008-08-12 | Silverbrook Research Pty Ltd | Inkjet nozzle with supply duct dimensioned for viscous damping |
| US7410243B2 (en) | 1997-07-15 | 2008-08-12 | Silverbrook Research Pty Ltd | Inkjet nozzle with resiliently biased ejection actuator |
| US7472984B2 (en) | 1997-07-15 | 2009-01-06 | Silverbrook Research Pty Ltd | Inkjet chamber with plurality of nozzles |
| US7475965B2 (en) | 1997-07-15 | 2009-01-13 | Silverbrook Research Pty Ltd | Inkjet printer with low droplet to chamber volume ratio |
| US7497555B2 (en) | 1998-07-10 | 2009-03-03 | Silverbrook Research Pty Ltd | Inkjet nozzle assembly with pre-shaped actuator |
| US7527357B2 (en) | 1997-07-15 | 2009-05-05 | Silverbrook Research Pty Ltd | Inkjet nozzle array with individual feed channel for each nozzle |
| US7578582B2 (en) | 1997-07-15 | 2009-08-25 | Silverbrook Research Pty Ltd | Inkjet nozzle chamber holding two fluids |
| US7591539B2 (en) | 1997-07-15 | 2009-09-22 | Silverbrook Research Pty Ltd | Inkjet printhead with narrow printing zone |
| US7628468B2 (en) | 1997-07-15 | 2009-12-08 | Silverbrook Research Pty Ltd | Nozzle with reciprocating plunger |
| US7661793B2 (en) | 1997-07-15 | 2010-02-16 | Silverbrook Research Pty Ltd | Inkjet nozzle with individual ink feed channels etched from both sides of wafer |
| US7708372B2 (en) | 1997-07-15 | 2010-05-04 | Silverbrook Research Pty Ltd | Inkjet nozzle with ink feed channels etched from back of wafer |
| US7753491B2 (en) | 1997-07-15 | 2010-07-13 | Silverbrook Research Pty Ltd | Printhead nozzle arrangement incorporating a corrugated electrode |
| US7753469B2 (en) | 1997-07-15 | 2010-07-13 | Silverbrook Research Pty Ltd | Inkjet nozzle chamber with single inlet and plurality of nozzles |
| US7775634B2 (en) | 1997-07-15 | 2010-08-17 | Silverbrook Research Pty Ltd | Inkjet chamber with aligned nozzle and inlet |
| US8117751B2 (en) | 1997-07-15 | 2012-02-21 | Silverbrook Research Pty Ltd | Method of forming printhead by removing sacrificial material through nozzle apertures |
| US8366243B2 (en) | 1997-07-15 | 2013-02-05 | Zamtec Ltd | Printhead integrated circuit with actuators proximate exterior surface |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54130026A (en) * | 1978-02-24 | 1979-10-09 | Oki Electric Ind Co Ltd | Impulse system ink jet head |
| JPS5559973A (en) * | 1978-10-28 | 1980-05-06 | Seiko Epson Corp | Printing head |
| JPS5559972A (en) * | 1978-10-28 | 1980-05-06 | Seiko Epson Corp | Ink jet recording head |
| JPS55128471A (en) * | 1979-03-29 | 1980-10-04 | Canon Inc | Recording head |
| JPS55128472A (en) * | 1979-03-29 | 1980-10-04 | Canon Inc | Recording head |
| EP0020182A1 (en) * | 1979-06-04 | 1980-12-10 | Xerox Corporation | Liquid drop generation apparatus and method |
| DE2937742C2 (en) * | 1979-09-18 | 1982-05-06 | Siemens AG, 1000 Berlin und 8000 München | Device for controlling writing nozzles in ink mosaic writing devices |
| US4326206A (en) * | 1980-06-30 | 1982-04-20 | Xerox Corporation | Method of reducing cross talk in ink jet arrays |
| JPS587364A (en) * | 1981-07-06 | 1983-01-17 | Seiko Epson Corp | Printing head |
| JPS5831761A (en) * | 1981-08-20 | 1983-02-24 | Ricoh Co Ltd | Non-impact recorder |
| US4418355A (en) * | 1982-01-04 | 1983-11-29 | Exxon Research And Engineering Co. | Ink jet apparatus with preloaded diaphragm and method of making same |
| US4439780A (en) * | 1982-01-04 | 1984-03-27 | Exxon Research And Engineering Co. | Ink jet apparatus with improved transducer support |
| US4588998A (en) * | 1983-07-27 | 1986-05-13 | Ricoh Company, Ltd. | Ink jet head having curved ink |
| DE3504011A1 (en) * | 1985-02-06 | 1986-08-07 | Siemens AG, 1000 Berlin und 8000 München | Making contact with oscillating components by means of conductive rubber |
| JP2681350B2 (en) * | 1986-11-19 | 1997-11-26 | キヤノン株式会社 | Ink jet device |
| JP2659819B2 (en) * | 1989-09-22 | 1997-09-30 | シャープ株式会社 | Droplet ejector |
| GB9000223D0 (en) * | 1990-01-05 | 1990-03-07 | Gen Electric Co Plc | Fluid dispenser |
| WO1992000849A1 (en) * | 1990-07-10 | 1992-01-23 | Fujitsu Limited | Printing head |
| JP2605976B2 (en) * | 1994-07-07 | 1997-04-30 | セイコーエプソン株式会社 | Ink jet recording device |
| DE10257004A1 (en) * | 2002-12-06 | 2004-06-17 | Steag Microparts Gmbh | Device for the parallel dosing of liquids |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE349676B (en) * | 1971-01-11 | 1972-10-02 | N Stemme | |
| DE2349555C2 (en) * | 1973-04-25 | 1983-04-07 | Siemens AG, 1000 Berlin und 8000 München | Print head for color liquid spray printers and the like |
| DE2323220B2 (en) * | 1973-05-09 | 1976-06-16 | Olympia Werke Ag, 2940 Wilhelmshaven | DEVICE FOR PRESSURE COMPENSATION IN A SPRAY HEAD OF AN INK SPRAY WRITER SUBJECT TO TEMPERATURE FLUCTUATIONS |
| US3900162A (en) * | 1974-01-10 | 1975-08-19 | Ibm | Method and apparatus for generation of multiple uniform fluid filaments |
| DE2556169C3 (en) * | 1974-12-16 | 1982-02-04 | Gould Inc., 60008 Rolling Meadows, Ill. | Impulse-controlled drop spray device |
-
1977
- 1977-01-03 DE DE19772700010 patent/DE2700010A1/en not_active Ceased
- 1977-01-10 JP JP52001387A patent/JPS6026713B2/en not_active Expired
- 1977-01-10 NL NL7700187A patent/NL7700187A/en not_active Application Discontinuation
- 1977-01-10 SE SE7700165A patent/SE427778B/en unknown
- 1977-01-14 FR FR7701113A patent/FR2338089A1/en active Granted
- 1977-01-14 GB GB1501/77A patent/GB1569425A/en not_active Expired
Cited By (83)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7540592B2 (en) | 1997-07-15 | 2009-06-02 | Silverbrook Research Pty Ltd | Micro-electromechanical nozzle assembly with an arcuate actuator |
| US7401900B2 (en) | 1997-07-15 | 2008-07-22 | Silverbrook Research Pty Ltd | Inkjet nozzle with long ink supply channel |
| US6786574B2 (en) | 1997-07-15 | 2004-09-07 | Silverbrook Research Pty Ltd | Micro-electromechanical fluid ejection device having a chamber that is volumetrically altered for fluid ejection |
| US6824252B2 (en) | 1997-07-15 | 2004-11-30 | Silverbrook Research Pty Ltd | Micro-electromechanical fluid ejection device having a nozzle guard |
| EP1512535A1 (en) * | 1997-07-15 | 2005-03-09 | Silverbrook Research Pty. Limited | Inkjet printer with magnetic piston actuator |
| US7553001B2 (en) | 1997-07-15 | 2009-06-30 | Silverbrook Research Pty Ltd | Inkjet printhead with laterally reciprocating paddle |
| US7066575B2 (en) | 1997-07-15 | 2006-06-27 | Silverbrook Research Pty Ltd | Micro-electromechanical fluid ejection device having a buckle-resistant actuator |
| US7086720B2 (en) | 1997-07-15 | 2006-08-08 | Silverbrook Research Pty Ltd | Micro-electromechanical fluid ejection device that incorporates a shape memory alloy based actuator |
| US7125102B2 (en) | 1997-07-15 | 2006-10-24 | Silverbrook Research Pty Ltd | Micro-electromechanical fluid ejection device with guided actuator movement |
| US7125103B2 (en) | 1997-07-15 | 2006-10-24 | Silverbrook Research Pty Ltd | Fluid ejection device with a through-chip micro-electromechanical actuator |
| US7147792B2 (en) | 1997-07-15 | 2006-12-12 | Silverbrook Research Pty Ltd | Method of fabricating inkjet nozzle chambers |
| US7175774B2 (en) | 1997-07-15 | 2007-02-13 | Silverbrook Research Pty Ltd | Method of fabricating inkjet nozzles |
| US7178903B2 (en) | 1997-07-15 | 2007-02-20 | Silverbrook Research Pty Ltd | Ink jet nozzle to eject ink |
| US7192119B2 (en) | 1997-07-15 | 2007-03-20 | Silverbrook Research Pty Ltd | Printhead nozzle arrangement with a micro-electromechanical shape memory alloy based actuator |
| US7219982B2 (en) | 1997-07-15 | 2007-05-22 | Silverbrook Research Pty Ltd | Printer nozzle for ejecting ink |
| US7234795B2 (en) | 1997-07-15 | 2007-06-26 | Silverbrook Research Pty Ltd | Inkjet nozzle with CMOS compatible actuator voltage |
| US7255424B2 (en) | 1997-07-15 | 2007-08-14 | Silverbrook Research Pty Ltd | Ink nozzle |
| US7275811B2 (en) | 1997-07-15 | 2007-10-02 | Silverbrook Research Pty Ltd | High nozzle density inkjet printhead |
| US7284837B2 (en) | 1997-07-15 | 2007-10-23 | Silverbrook Research Pty Ltd | Fluid ejection device with micro-electromechanical fluid ejection actuators |
| US7287834B2 (en) | 1997-07-15 | 2007-10-30 | Silverbrook Research Pty Ltd | Micro-electromechanical ink ejection device with an elongate actuator |
| US7293855B2 (en) | 1997-07-15 | 2007-11-13 | Silverbrook Research Pty Ltd | Inkjet nozzle with ink supply channel parallel to drop trajectory |
| US7328975B2 (en) | 1997-07-15 | 2008-02-12 | Silverbrook Research Pty Ltd | Injet printhead with thermal bend arm exposed to ink flow |
| US7334874B2 (en) | 1997-07-15 | 2008-02-26 | Silverbrook Research Pty Ltd | Inkjet nozzle chamber with electrostatically attracted plates |
| US7350903B2 (en) | 1997-07-15 | 2008-04-01 | Silverbrook Research Pty Ltd | Inkjet printhead with common chamber and actuator material |
| US7360871B2 (en) | 1997-07-15 | 2008-04-22 | Silverbrook Research Pty Ltd | Inkjet chamber with ejection actuator between inlet and nozzle |
| US7364270B2 (en) | 1997-07-15 | 2008-04-29 | Silverbrook Research Pty Ltd | Fluid ejection device having an elongate micro-electromechanical actuator |
| US7387365B2 (en) | 1997-07-15 | 2008-06-17 | Silverbrook Research Pty Ltd | Nozzle for an inkjet printer incorporating a plunger assembly |
| US7393083B2 (en) | 1997-07-15 | 2008-07-01 | Silverbrook Research Pty Ltd | Inkjet printer with low nozzle to chamber cross-section ratio |
| AU2006202037B2 (en) * | 1997-07-15 | 2008-07-03 | Zamtec Limited | Inkjet printer with magnetic piston actuator |
| US7398597B2 (en) | 1997-07-15 | 2008-07-15 | Silverbrook Research Pty Ltd | Method of fabricating monolithic microelectromechanical fluid ejection device |
| EP0999933A1 (en) * | 1997-07-15 | 2000-05-17 | Silverbrook Research Pty. Limited | Magnetic-field-acutated ink jet nozzle |
| US7401884B2 (en) | 1997-07-15 | 2008-07-22 | Silverbrook Research Pty Ltd | Inkjet printhead with integral nozzle plate |
| US7404625B2 (en) | 1997-07-15 | 2008-07-29 | Silverbrook Research Pty Ltd | Ink jet nozzle arrangement having paddle forming a portion of a wall |
| US7410250B2 (en) | 1997-07-15 | 2008-08-12 | Silverbrook Research Pty Ltd | Inkjet nozzle with supply duct dimensioned for viscous damping |
| US7410243B2 (en) | 1997-07-15 | 2008-08-12 | Silverbrook Research Pty Ltd | Inkjet nozzle with resiliently biased ejection actuator |
| US7416280B2 (en) | 1997-07-15 | 2008-08-26 | Silverbrook Research Pty Ltd | Inkjet printhead with hollow drop ejection chamber formed partly of actuator material |
| US7448728B2 (en) | 1997-07-15 | 2008-11-11 | Silverbrook Research Pty Ltd | Nozzle assembly having a sprung electromagnetically operated plunger |
| US7472984B2 (en) | 1997-07-15 | 2009-01-06 | Silverbrook Research Pty Ltd | Inkjet chamber with plurality of nozzles |
| US7475965B2 (en) | 1997-07-15 | 2009-01-13 | Silverbrook Research Pty Ltd | Inkjet printer with low droplet to chamber volume ratio |
| US8393714B2 (en) | 1997-07-15 | 2013-03-12 | Zamtec Ltd | Printhead with fluid flow control |
| US7708381B2 (en) | 1997-07-15 | 2010-05-04 | Silverbrook Research Pty Ltd | Fluid ejection device with resistive element close to drive circuits |
| EP0999933A4 (en) * | 1997-07-15 | 2000-12-20 | Silverbrook Res Pty Ltd | A field acutated ink jet |
| US6986202B2 (en) | 1997-07-15 | 2006-01-17 | Silverbrook Research Pty Ltd. | Method of fabricating a micro-electromechanical fluid ejection device |
| US7566113B2 (en) | 1997-07-15 | 2009-07-28 | Silverbrook Research Pty Ltd | Inkjet nozzle incorporating serpentine actuator |
| US7568788B2 (en) | 1997-07-15 | 2009-08-04 | Silverbrook Research Pty Ltd | Printhead with barrier at chamber inlet |
| US7578582B2 (en) | 1997-07-15 | 2009-08-25 | Silverbrook Research Pty Ltd | Inkjet nozzle chamber holding two fluids |
| US7591539B2 (en) | 1997-07-15 | 2009-09-22 | Silverbrook Research Pty Ltd | Inkjet printhead with narrow printing zone |
| US7628468B2 (en) | 1997-07-15 | 2009-12-08 | Silverbrook Research Pty Ltd | Nozzle with reciprocating plunger |
| US7631956B2 (en) | 1997-07-15 | 2009-12-15 | Silverbrook Research Pty Ltd | Ink jet printhead with glass nozzle chambers |
| US7635178B2 (en) | 1997-07-15 | 2009-12-22 | Silverbrook Research Pty Ltd | Nozzle apparatus for an inkjet printhead with a solenoid piston |
| US7658473B2 (en) | 1997-07-15 | 2010-02-09 | Silverbrook Research Pty Ltd | Inkjet printhead with arcuate actuator path |
| US7661793B2 (en) | 1997-07-15 | 2010-02-16 | Silverbrook Research Pty Ltd | Inkjet nozzle with individual ink feed channels etched from both sides of wafer |
| US7669971B2 (en) | 1997-07-15 | 2010-03-02 | Silverbrook Research Pty Ltd | Inkjet printer with low nozzle to chamber cross-section ratio |
| US7699440B2 (en) | 1997-07-15 | 2010-04-20 | Silverbrook Research Pty Ltd | Inkjet printhead with heater element close to drive circuits |
| US7703890B2 (en) | 1997-07-15 | 2010-04-27 | Silverbrook Research Pty Ltd. | Printhead with backflow resistant nozzle chambers |
| US7708372B2 (en) | 1997-07-15 | 2010-05-04 | Silverbrook Research Pty Ltd | Inkjet nozzle with ink feed channels etched from back of wafer |
| US7527357B2 (en) | 1997-07-15 | 2009-05-05 | Silverbrook Research Pty Ltd | Inkjet nozzle array with individual feed channel for each nozzle |
| US7717542B2 (en) | 1997-07-15 | 2010-05-18 | Silverbrook Research Pty Ltd | Inkjet chamber with plurality of nozzles and shared actuator |
| US7731336B2 (en) | 1997-07-15 | 2010-06-08 | Silverbrook Research Pty Ltd | Inkjet nozzle arrangement |
| US7731334B2 (en) | 1997-07-15 | 2010-06-08 | Silverbrook Research Pty Ltd | Inkjet nozzle utilizing electrostatic attraction between parallel plates |
| US7753491B2 (en) | 1997-07-15 | 2010-07-13 | Silverbrook Research Pty Ltd | Printhead nozzle arrangement incorporating a corrugated electrode |
| US7753469B2 (en) | 1997-07-15 | 2010-07-13 | Silverbrook Research Pty Ltd | Inkjet nozzle chamber with single inlet and plurality of nozzles |
| US7753492B2 (en) | 1997-07-15 | 2010-07-13 | Silverbrook Research Pty Ltd | Micro-electromechanical fluid ejection mechanism having a shape memory alloy actuator |
| US7758166B2 (en) | 1997-07-15 | 2010-07-20 | Silverbrook Research Pty Ltd | Inkjet nozzle with paddle layer sandwiched between first and second wafers |
| US7771018B2 (en) | 1997-07-15 | 2010-08-10 | Silverbrook Research Pty Ltd | Ink ejection nozzle arrangement for an inkjet printer |
| US7775632B2 (en) | 1997-07-15 | 2010-08-17 | Silverbrook Research Pty Ltd | Nozzle arrangement with expandable actuator |
| US7775634B2 (en) | 1997-07-15 | 2010-08-17 | Silverbrook Research Pty Ltd | Inkjet chamber with aligned nozzle and inlet |
| US7794053B2 (en) | 1997-07-15 | 2010-09-14 | Silverbrook Research Pty Ltd | Inkjet printhead with high nozzle area density |
| US7815290B2 (en) | 1997-07-15 | 2010-10-19 | Silverbrook Research Pty Ltd | Inkjet printhead with paddle for ejecting ink from one of two nozzles |
| US7905574B2 (en) | 1997-07-15 | 2011-03-15 | Silverbrook Research Pty Ltd | Method of fabricating resistor and proximate drive transistor for a printhead |
| US7914119B2 (en) | 1997-07-15 | 2011-03-29 | Silverbrook Research Pty Ltd | Printhead with columns extending across chamber inlet |
| US7934806B2 (en) | 1997-07-15 | 2011-05-03 | Silverbrook Research Pty Ltd | Inkjet nozzle incorporating piston actuator |
| US7934808B2 (en) | 1997-07-15 | 2011-05-03 | Silverbrook Research Pty Ltd | Inkjet printhead with nozzle chambers each holding two fluids |
| US7934797B2 (en) | 1997-07-15 | 2011-05-03 | Silverbrook Research Pty Ltd | Printhead with reciprocating coils |
| US7950774B2 (en) | 1997-07-15 | 2011-05-31 | Silverbrook Research Pty Ltd | Inkjet printhead with narrow printing zone |
| US7950773B2 (en) | 1997-07-15 | 2011-05-31 | Silverbrook Research Pty Ltd | Nozzle with magnetically actuated reciprocating plunger |
| US7950775B2 (en) | 1997-07-15 | 2011-05-31 | Silverbrook Research Pty Ltd | Printhead integrated circuit having glass nozzle chambers |
| US7959263B2 (en) | 1997-07-15 | 2011-06-14 | Silverbrook Research Pty Ltd | Printhead integrated circuit with a solenoid piston |
| US7992968B2 (en) | 1997-07-15 | 2011-08-09 | Silverbrook Research Pty Ltd | Fluid ejection device with overlapping firing chamber and drive FET |
| US8079669B2 (en) | 1997-07-15 | 2011-12-20 | Silverbrook Research Pty Ltd | Printhead with high drag nozzle chamber inlets |
| US8117751B2 (en) | 1997-07-15 | 2012-02-21 | Silverbrook Research Pty Ltd | Method of forming printhead by removing sacrificial material through nozzle apertures |
| US8366243B2 (en) | 1997-07-15 | 2013-02-05 | Zamtec Ltd | Printhead integrated circuit with actuators proximate exterior surface |
| US7497555B2 (en) | 1998-07-10 | 2009-03-03 | Silverbrook Research Pty Ltd | Inkjet nozzle assembly with pre-shaped actuator |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5288026A (en) | 1977-07-22 |
| FR2338089B1 (en) | 1982-05-14 |
| JPS6026713B2 (en) | 1985-06-25 |
| FR2338089A1 (en) | 1977-08-12 |
| SE7700165L (en) | 1977-07-16 |
| NL7700187A (en) | 1977-07-19 |
| SE427778B (en) | 1983-05-02 |
| DE2700010A1 (en) | 1977-07-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB1569425A (en) | Liquid drop generator | |
| CA1082284A (en) | Separable liquid droplet instrument and magnetic drivers therefor | |
| US4115789A (en) | Separable liquid droplet instrument and piezoelectric drivers therefor | |
| US4032929A (en) | High density linear array ink jet assembly | |
| US4516140A (en) | Print head actuator for an ink jet printer | |
| EP0095911A2 (en) | Pressure pulse droplet ejector and array | |
| US4210920A (en) | Magnetically activated plane wave stimulator | |
| CA2075783C (en) | High density ink jet printhead | |
| US5289209A (en) | Printing head for ink-jet printer | |
| US4605939A (en) | Ink jet array | |
| US6352337B1 (en) | Assisted drop-on-demand inkjet printer using deformable micro-acuator | |
| US4779099A (en) | Clamp for and method of fabricating a multi-layer ink jet apparatus | |
| KR960013664A (en) | Factor head for ink jet printer and manufacturing method thereof | |
| JPS5842831B2 (en) | Multiple liquid droplet stream generator | |
| IL102822A (en) | Method for manufacturing a high density ink jet printhead array | |
| JPS629431B2 (en) | ||
| GB1558483A (en) | Coincidnece ink jet | |
| JPS58102774A (en) | Ink jet recording method and its device | |
| US4167343A (en) | Print wire actuator mechanism | |
| JPH01500891A (en) | Ink recording head with membrane that can be excited by piezoelectric effect | |
| US5886717A (en) | Printing head for an ink jet printer with titanium plate comb | |
| JPH05500933A (en) | Piezoelectric transducer for inkjet equipment | |
| CA2142617C (en) | Ink jet print head | |
| JP3484841B2 (en) | Ink jet recording head | |
| US4703330A (en) | Color ink jet drop generator using a solid acoustic cavity |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed [section 19, patents act 1949] | ||
| PCNP | Patent ceased through non-payment of renewal fee |