CA2059006A1 - Process for a liquid-jet printing system - Google Patents
Process for a liquid-jet printing systemInfo
- Publication number
- CA2059006A1 CA2059006A1 CA002059006A CA2059006A CA2059006A1 CA 2059006 A1 CA2059006 A1 CA 2059006A1 CA 002059006 A CA002059006 A CA 002059006A CA 2059006 A CA2059006 A CA 2059006A CA 2059006 A1 CA2059006 A1 CA 2059006A1
- Authority
- CA
- Canada
- Prior art keywords
- droplets
- nozzles
- receiving surface
- gas
- liquid
- 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.)
- Abandoned
Links
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000000694 effects Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 7
- 239000000243 solution Substances 0.000 description 2
- 230000005684 electric field Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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
- B41J2/015—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
-
- 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
- B41J2/05—Ink jet characterised by the jet generation process generating single droplets or particles on demand by pressure, e.g. electromechanical transducers produced by the application of heat
-
- 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
- B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
-
- 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
- B41J2/02—Ink jet characterised by the jet generation process generating a continuous ink jet
- B41J2/03—Ink jet characterised by the jet generation process generating a continuous ink jet by pressure
- B41J2002/031—Gas flow deflection
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Abstract
ABSTRACT
A process for a liquid-jet printing system provides for nozzles that are arranged horizontally relative to the receiving surface, these being used to eject droplets that are then deflected towards the receiving surface by gas jets from gas nozzles that are arranged vertically with respect to these nozzles.
A process for a liquid-jet printing system provides for nozzles that are arranged horizontally relative to the receiving surface, these being used to eject droplets that are then deflected towards the receiving surface by gas jets from gas nozzles that are arranged vertically with respect to these nozzles.
Description
2059~06 The present invention relates to a process for liquid-jet printing systems, in particular, for ~ranking and value-~tamping machines, in which text and graphic symbols are generated on a receiving surface by the ejection of droplets from nozzles.
It is known (DE 23 43 420 B2, DE 25 20 702 C3, DE 25 48 885 A1, DE 26 19 1~3 Al) that in liquid-jet printing systems, the liquid nozzles can be arranged vertically relative to the receiving surface. Electrodes that are used to charge the droplets of liquid and to deflect the droplets are arranged in front of the nozzle outlet openings. When this is done, a continuous stream of droplets is required, depending on the exit speed from the nozzles and the viscocity of the liquid, which can be changed within limits to increase a faster write speed. Such a frequency increase results in a smaller ejection interval between the droplets and this can lead to problems connected with charging said droplets.
It is the task of the present invention to create a process that ensures the proper deflection of the droplets of a liquid-jet printing system at a high droplet frequency, regardless of charging problems.
This task has been ~olved by the present invention as set out in the descriptive portion of the first patent claim. The sub-claims describe additional advantageous solutions.
20~900~
The advantage of the present invention lies in u~ing a controlled gas jet to deflect the droplets. This eliminates all of the problems connected with charging the droplets in an electrical field and the associated, even, addition and mixing of mainly magnetic components in the printing liquid.
The present invention is described in greater detail below on the basis of the drawing appended hereto. This drawing shows the method used to deflect the droplets emerging from a nozzle. A
plurality of such systems can be combined with each other.
In contrast to known liquid-jet printing systems, the nozzles 1 are arranged horizontally with reference to the receiving surface 3. The droplets that emerge thus contain a horizontal movement component in their trajectories.
As an example, the droplets 4 are ejected continuously at a constant frequency from the nozzlè l. To this end, the nozzles can be caused to oscillate by a piezoelectric converter, in the known manner, in order that the droplets can be ejected at a constant frequency.
A gas jet 2 is arranged vertically with reference to the receiving surface 3 and the nozzle 1, and a gas jet that is directed perpendicular to the receiving surface 3 emerges from this nozzle. This gas jet is controlled and accordingly de~lects the individual droplets 4 in the direction of the receiving surface 3.
The controllable veloaity of the gas jet cause~ a variously inclined trajectory of the droplets 4. This means that the droplets 4 can be positioned in various points on the receiving surface 3.
A further solution for positioning the droplets 4 on the receiving surface 3 is to reverse the above-discussed principle:
given a constant gas jet from the gas nozzle 2, the injection velocity of the droplets 4 is varied. The latter can be done in a known manner using miniature pumps controlled by solenoids.
The emergence of the droplets 4 from the nozzle 1 can then be initiated by the injector effect of the gas jet from the gas nozzle 2 that pas6es the nozzle opening.
The addition of the movement components of the gas jet and of the droplets 4 as a vector leads to changes in the trajectories when, in each case, an exit velocity, either that of the droplets 4 or of the gas jet, i~ controlled.
In the simplest ca6e, air is used as the gas. Special gas mixtures that are selected according to the consistency of the printing liquid can contribute to increasing the print speed of 20~9006 the system. In addition, it i5 also possible to mix scents into the liquid and/or the gas for advertizing purposes.
In the known manner, there iB a catch basin 5 for dropl~ts 4 that have not been de~lected provided opposite the nozzle 1. The liquid that connects in this trap 5 is then returned to the reservoir by way of an appropriate system.
It is known (DE 23 43 420 B2, DE 25 20 702 C3, DE 25 48 885 A1, DE 26 19 1~3 Al) that in liquid-jet printing systems, the liquid nozzles can be arranged vertically relative to the receiving surface. Electrodes that are used to charge the droplets of liquid and to deflect the droplets are arranged in front of the nozzle outlet openings. When this is done, a continuous stream of droplets is required, depending on the exit speed from the nozzles and the viscocity of the liquid, which can be changed within limits to increase a faster write speed. Such a frequency increase results in a smaller ejection interval between the droplets and this can lead to problems connected with charging said droplets.
It is the task of the present invention to create a process that ensures the proper deflection of the droplets of a liquid-jet printing system at a high droplet frequency, regardless of charging problems.
This task has been ~olved by the present invention as set out in the descriptive portion of the first patent claim. The sub-claims describe additional advantageous solutions.
20~900~
The advantage of the present invention lies in u~ing a controlled gas jet to deflect the droplets. This eliminates all of the problems connected with charging the droplets in an electrical field and the associated, even, addition and mixing of mainly magnetic components in the printing liquid.
The present invention is described in greater detail below on the basis of the drawing appended hereto. This drawing shows the method used to deflect the droplets emerging from a nozzle. A
plurality of such systems can be combined with each other.
In contrast to known liquid-jet printing systems, the nozzles 1 are arranged horizontally with reference to the receiving surface 3. The droplets that emerge thus contain a horizontal movement component in their trajectories.
As an example, the droplets 4 are ejected continuously at a constant frequency from the nozzlè l. To this end, the nozzles can be caused to oscillate by a piezoelectric converter, in the known manner, in order that the droplets can be ejected at a constant frequency.
A gas jet 2 is arranged vertically with reference to the receiving surface 3 and the nozzle 1, and a gas jet that is directed perpendicular to the receiving surface 3 emerges from this nozzle. This gas jet is controlled and accordingly de~lects the individual droplets 4 in the direction of the receiving surface 3.
The controllable veloaity of the gas jet cause~ a variously inclined trajectory of the droplets 4. This means that the droplets 4 can be positioned in various points on the receiving surface 3.
A further solution for positioning the droplets 4 on the receiving surface 3 is to reverse the above-discussed principle:
given a constant gas jet from the gas nozzle 2, the injection velocity of the droplets 4 is varied. The latter can be done in a known manner using miniature pumps controlled by solenoids.
The emergence of the droplets 4 from the nozzle 1 can then be initiated by the injector effect of the gas jet from the gas nozzle 2 that pas6es the nozzle opening.
The addition of the movement components of the gas jet and of the droplets 4 as a vector leads to changes in the trajectories when, in each case, an exit velocity, either that of the droplets 4 or of the gas jet, i~ controlled.
In the simplest ca6e, air is used as the gas. Special gas mixtures that are selected according to the consistency of the printing liquid can contribute to increasing the print speed of 20~9006 the system. In addition, it i5 also possible to mix scents into the liquid and/or the gas for advertizing purposes.
In the known manner, there iB a catch basin 5 for dropl~ts 4 that have not been de~lected provided opposite the nozzle 1. The liquid that connects in this trap 5 is then returned to the reservoir by way of an appropriate system.
Claims (4)
1. A process for liquid-jet printing systems, in particular for franking and value-stamping machines, in which text and graphic symbols are generated on a receiving surface by the ejection of droplets from nozzles, characterized in that opposite the receiving surface (3) there are horizontally arranged nozzles (1) to eject droplets (4), and vertically relative to the nozzles (1) and to the receiving surface (3) there are gas nozzles (2) to eject a stream of gas that serves to deflect the droplets (4) that emerge from the nozzles (1) in the direction of the receiving surface.
2. A process as defined in claim 1, characterized by the continuous ejection of droplets (4) from the nozzles (1) at a constant frequency and a binary control of the gas jet with controllable exit velocities.
3. A process as defined in claim 1, characterized by a continuous gas flow and ejection of droplets from the nozzle (1) that can be varied with respect to its frequency and its velocity.
4. A process as defined in claim 1 to claim 3, characterized by the use of the injector effect of the gas jet to initiate the emergence of the droplets from the nozzle (1).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4100729A DE4100729A1 (en) | 1991-01-09 | 1991-01-09 | METHOD FOR LIQUID JET PRINTING SYSTEMS |
| DEP4100729.8 | 1991-01-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2059006A1 true CA2059006A1 (en) | 1992-07-10 |
Family
ID=6422888
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002059006A Abandoned CA2059006A1 (en) | 1991-01-09 | 1992-01-08 | Process for a liquid-jet printing system |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0494385A1 (en) |
| KR (1) | KR920014621A (en) |
| CA (1) | CA2059006A1 (en) |
| CS (1) | CS4792A3 (en) |
| DE (1) | DE4100729A1 (en) |
| HU (1) | HUT60192A (en) |
| PL (1) | PL292743A1 (en) |
| ZA (1) | ZA9269B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6588888B2 (en) * | 2000-12-28 | 2003-07-08 | Eastman Kodak Company | Continuous ink-jet printing method and apparatus |
| US6554410B2 (en) * | 2000-12-28 | 2003-04-29 | Eastman Kodak Company | Printhead having gas flow ink droplet separation and method of diverging ink droplets |
| US6508542B2 (en) | 2000-12-28 | 2003-01-21 | Eastman Kodak Company | Ink drop deflection amplifier mechanism and method of increasing ink drop divergence |
| US6863384B2 (en) * | 2002-02-01 | 2005-03-08 | Eastman Kodak Company | Continuous ink jet method and apparatus |
| US6746108B1 (en) | 2002-11-18 | 2004-06-08 | Eastman Kodak Company | Method and apparatus for printing ink droplets that strike print media substantially perpendicularly |
| US7413293B2 (en) | 2006-05-04 | 2008-08-19 | Eastman Kodak Company | Deflected drop liquid pattern deposition apparatus and methods |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3869986A (en) * | 1974-01-16 | 1975-03-11 | Pitney Bowes Inc | Ink jet postage printing apparatus |
| US4019188A (en) * | 1975-05-12 | 1977-04-19 | International Business Machines Corporation | Micromist jet printer |
| SE400841B (en) * | 1976-02-05 | 1978-04-10 | Hertz Carl H | WAY TO CREATE A LIQUID RAY AND DEVICE FOR IMPLEMENTING THE SET |
| GB1521874A (en) * | 1977-03-01 | 1978-08-16 | Itt Creed | Printing apparatus |
| JPS56146773A (en) * | 1980-04-16 | 1981-11-14 | Mitsubishi Electric Corp | Ink printing device |
-
1991
- 1991-01-09 DE DE4100729A patent/DE4100729A1/en not_active Ceased
- 1991-12-02 HU HU913762A patent/HUT60192A/en unknown
- 1991-12-10 EP EP91121127A patent/EP0494385A1/en not_active Withdrawn
- 1991-12-10 KR KR1019910022553A patent/KR920014621A/en not_active Application Discontinuation
- 1991-12-12 PL PL29274391A patent/PL292743A1/en unknown
-
1992
- 1992-01-06 ZA ZA9269A patent/ZA9269B/en unknown
- 1992-01-08 CA CA002059006A patent/CA2059006A1/en not_active Abandoned
- 1992-01-08 CS CS9247A patent/CS4792A3/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| EP0494385A1 (en) | 1992-07-15 |
| CS4792A3 (en) | 1992-08-12 |
| KR920014621A (en) | 1992-08-25 |
| HU913762D0 (en) | 1992-03-30 |
| DE4100729A1 (en) | 1992-07-16 |
| ZA9269B (en) | 1992-10-28 |
| HUT60192A (en) | 1992-08-28 |
| PL292743A1 (en) | 1992-07-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4196437A (en) | Method and apparatus for forming a compound liquid jet particularly suited for ink-jet printing | |
| US6802588B2 (en) | Fluid jet apparatus and method for cleaning inkjet printheads | |
| EP0456523A2 (en) | Low-pressure paint atomizer-air spray gun | |
| US4353078A (en) | Ink jet print head having dynamic impedance adjustment | |
| US20080074477A1 (en) | System for controlling droplet volume in continuous ink-jet printer | |
| EP0510648A2 (en) | High frequency printing mechanism | |
| EP2219873B1 (en) | Continuous printer with droplet selection mechanism | |
| US20190143678A1 (en) | Shuttering of Aerosol Streams | |
| EP0787589A3 (en) | Ink jet recording head | |
| EP0110987A1 (en) | Ink jet printer. | |
| EP0060865A4 (en) | Method and apparatus for ink jet printing. | |
| WO2009070225A1 (en) | Liquid drop dispenser with movable deflector | |
| IL102293A (en) | Liquid projection method and device for high-resolution printing in a continuous ink-jet printer | |
| JP2009511302A (en) | Print with differential inkjet deflection | |
| US8308269B2 (en) | Print head | |
| CA1112101A (en) | Mosaic printer heads | |
| JPH05220976A (en) | Droplet catching device for continuous ink jet printer | |
| EP0911165A3 (en) | Continuous ink jet printer with variable contact drop deflection | |
| CA2059006A1 (en) | Process for a liquid-jet printing system | |
| JPH0343988B2 (en) | ||
| US4825229A (en) | Method and apparatus for ink jet printing | |
| JP2009538225A (en) | System and method for droplet ejection | |
| GB1598779A (en) | Ink-jet printers | |
| RU95105713A (en) | Method of ink-jet printing and printing head to implement the method | |
| KR830008838A (en) | Apparatus and method for optionally spraying droplets |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |