CA2203954A1 - Means for locating an eyelid assembly to a continuous ink jet printhead - Google Patents
Means for locating an eyelid assembly to a continuous ink jet printheadInfo
- Publication number
- CA2203954A1 CA2203954A1 CA 2203954 CA2203954A CA2203954A1 CA 2203954 A1 CA2203954 A1 CA 2203954A1 CA 2203954 CA2203954 CA 2203954 CA 2203954 A CA2203954 A CA 2203954A CA 2203954 A1 CA2203954 A1 CA 2203954A1
- Authority
- CA
- Canada
- Prior art keywords
- eyelid
- catcher
- assembly
- linkage mechanism
- ink jet
- 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
- 210000000744 eyelid Anatomy 0.000 title claims abstract description 65
- 230000013011 mating Effects 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000012530 fluid Substances 0.000 description 3
- 238000007641 inkjet printing Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000002689 soil 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
- B41J2/135—Nozzles
- B41J2/165—Prevention or detection of nozzle clogging, e.g. cleaning, capping or moistening for nozzles
- B41J2/16505—Caps, spittoons or covers for cleaning or preventing drying out
- B41J2/16508—Caps, spittoons or covers for cleaning or preventing drying out connected with the printer frame
-
- 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
- B41J2/1714—Conditioning of the outside of ink supply systems, e.g. inkjet collector cleaning, ink mist removal
-
- 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
- B41J2/18—Ink recirculation systems
- B41J2/185—Ink-collectors; Ink-catchers
Landscapes
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
- Ink Jet (AREA)
Abstract
An eyelid assembly is precisely aligned to a catcher in a continuous ink jet printhead. An eyelid linkage mechanism associated with the eyelid assembly, fastens to the ink jet printhead to provide pivot areas that allow the eyelid assembly to rotate in and out of the catcher . A fixture precisely holds and locates the eyelid linkage mechanism to accurately register the eyelid assembly to the catcher. The accurately registered eyelid linkage mechanism is then bonded to the printhead frame, and the eyelid assembly can be secured to the eyelid linkage mechanism using a pivot pin.
Description
CA 022039~4 1997-04-29 MEANS FOR LOCATING AN EYELID ASSEMBLY
TO A CONTINUOUS INK JET PRINTHEAD
Technical Field The present invention relates to continuous ink jet printing and, more particularly, to a method for registering the linkage that locates an eyelid assembly to a continuous ink jet printhead Backqround Art Ink jet printing systems are known in which a printhead defines one or more rows of orifices which receive an electrically conductive recording fluid from a pressurized fluid supply manifold and eject the fluid in rows of parallel streams. Printers using such printheads accomplish graphic reproduction by selectively charging and deflecting the drops in each of the streams and depositing at least some of the drops on a print receiving medium, while others of the drops strike a drop catcher device.
When the ink j et printhead is not in operation, means must be provided to seal the printhead so that ink does not dry in the catcher face area, or weep from the jets and soil the apparatus or adj acent work surfaces . It is desirable, therefore, to attach an eyelid assembly to a printhead to allow the starting and shutdown of the ink jet printer without requiring the use of a separate catch pan, which must be placed between the printhead and the recording means during startup and shutdown of the printer.
The eyelid diverts the flow of ink from a resonator back into the printhead while the printer is running but not printing. In prior art CA 022039~4 1997-04-29 eyelid assemblies, screws are used to fasten pivot plates into an ink jet printhead. A fixture is used to locate these pivot plates to an unimportant part of the printhead The optimum relationship is between the catcher and the eyelid assembly.
Without this relationship, tolerance is added by the assembly of many parts. Clearance holes for securing the pivot plates with screws also add additional tolerance. Screws require multi-directional assembly instead of the desired uni-directional assembly, which adds labor costs.
Furthermore, screws inherently increase part count to a product, which is also undesirable. Whatever means is used to align the catcher to the eyelid assembly, the more precise an alignment is, the better the eyelid operates.
It is seen then that there exists a need for a precise eyelid assembly registration means which can be used with continuous ink jet printheads.
Summary of the Invention This need is met by the registration system and method according to the present 2s invention, wherein mounts and linkage for locating an eyelid assembly for a continuous ink jet printhead are precisely registered. The precision design establishes a direct locational relationship between the catcher and the eyelid assembly. This accuracy is assured by eliminating screws and their clearance holes, and by fixturing directly to the catcher via precise alignment apertures in the bottom of the catcher.
In accordance with one aspect of the present invention, an eyelid assembly is precisely CA 022039~4 1997-04-29 aligned to a catcher in a continuous ink jet printhead. An eyelid linkage mechanism associated with the eyelid assembly, fastens to the ink jet printhead to provide pivot areas that allow the eyelid assembly to rotate in and out of the catcher.
A fixture precisely holds and locates the eyelid linkage mechanism to accurately register the eyelid assembly to the catcher. The eyelid linkage mechanism is bonded to the printhead frame in reference to the catcher, to provide the pivot areas that allow the eyelid assembly to rotate in and out of the catcher. The accurately registered eyelid assembly is then secured to the eyelid linkage mechanism .
Accordingly, it is an obj ect of the present invention to provide precise registration of the linkage mechanism that locates an eyelid assembly to a continuous ink jet printhead. It is an advantage of the present invention to provide such a registration method and system wherein the optimum relationship between the catcher and eyelid assembly is realized.
Other objects and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims.
Brief Description of the Drawinqs Fig . 1 is an exploded view of an ink j et printhead structure illustrating alignment between the ink jet printhead and the eyelid assembly, in accordance with the present inventioni and Fig. 2 illustrates achievement of the precision locational relationship of Fig. 1, between the eyelid assembly and the catcher, using a CA 022039~i4 l997-04-29 temporary f ixture .
Detailed Descri~tion of the Preferred Embodiments F~eferring to Figs. 1 and 2, precise registration between an eyelid assembly and a continuous ink jet printhead, according to the present invention, is shown. A typical ink jet printhead, generally designated 10, includes a resonator 2, a catcher 3, and an eyelid assembly 1.
An eyelid linkage mechanism, or pivot plates 4, fasten to and travel with the ink jet printhead 10. The pivot plates are bonded into place, such as with an instant adhesive that is wicked or placed between identified bond sites 8 of the eyelid linkage 4 and a printhead frame 5. The pivot plates provide pivot areas that allow the eyelid assembly 1 to rotate in-and-out of the catcher 3, thereby diverting ink from the resonator 2 when actuated into the ink path and sealing against the catcher 3. The eyelid assembly l can be disconnected from the printhead 10 by pulling a pivot pin 7, receivable into pivot apertures 13, from the eyelid assembly 1 and linkage plates 4.
The eyelid assembly 1 stays with the printer and the linkage plates go with the printhead.
Continuing with Figs. 1 and 2, the precision design according to the present invention succeeds by establishing a direct locational relationship between the catcher 3 and the eyelid assembly l. This accuracy is ensured by eliminating screws and their clearance holes, and by fixturing directly to the catcher 3 via precise alignment holes 6 located in the bottom of the catcher 3.
Fixture 9 precisely holds and locates the eyelid links 4, and accurately registers to the catcher CA 022039~4 1997-04-29 assembly via the catcher alignment holes 6 and associated mating pins 11. This creates the most accurate possible relationship between the eyelid assembly 1 and the catcher 3 by bypassing all of the hardware between these parts via the f ixture . A
bonding means can then be applied to bond sites 8, associated with the precisely aligned eyelid assembly 1 and catcher 3, to permanize the relationship between these parts. The bonding means can be any suitable means, including instant adhes ive .
Referring to Fig. 1, the bond sites 8 preferably have a surface finish of lO0-200 RMS to enhance mechanical interlocking of the bonding means. The printhead frame 5 utilizes capillary channels 12 to feed instant adhesive between the eyelid links 4 and the printhead frame 5 to the bond sites 8. An instant adhesive can be pre-applied to the printhead frame 5 or the eyelid links 4, as long as the positioning of the parts takes place before the adhesive dries, typically within 45 seconds.
Industrial ApplicabilitY and Advantaqes The present invention is useful in the field of ink jet printing, and has the advantage of maximizing print quality by allowing the print media to be particularly close to the printer. The present invention provides the further advantage of providing a precisely registered sealing surface between the eyelid assembly and the printhead.
Finally, the registration system and method of the present invention provides the advantage of eliminating screws, thereby saving labor and 3 5 assembly costs .
CA 022039~i4 1997-04-29 Having descrlbed the invention in detail and by reference to the preferred embodiment thereof, it will be apparent that other modifications and variations are possible without s departing from the scope of the invention defined in the appended claims.
TO A CONTINUOUS INK JET PRINTHEAD
Technical Field The present invention relates to continuous ink jet printing and, more particularly, to a method for registering the linkage that locates an eyelid assembly to a continuous ink jet printhead Backqround Art Ink jet printing systems are known in which a printhead defines one or more rows of orifices which receive an electrically conductive recording fluid from a pressurized fluid supply manifold and eject the fluid in rows of parallel streams. Printers using such printheads accomplish graphic reproduction by selectively charging and deflecting the drops in each of the streams and depositing at least some of the drops on a print receiving medium, while others of the drops strike a drop catcher device.
When the ink j et printhead is not in operation, means must be provided to seal the printhead so that ink does not dry in the catcher face area, or weep from the jets and soil the apparatus or adj acent work surfaces . It is desirable, therefore, to attach an eyelid assembly to a printhead to allow the starting and shutdown of the ink jet printer without requiring the use of a separate catch pan, which must be placed between the printhead and the recording means during startup and shutdown of the printer.
The eyelid diverts the flow of ink from a resonator back into the printhead while the printer is running but not printing. In prior art CA 022039~4 1997-04-29 eyelid assemblies, screws are used to fasten pivot plates into an ink jet printhead. A fixture is used to locate these pivot plates to an unimportant part of the printhead The optimum relationship is between the catcher and the eyelid assembly.
Without this relationship, tolerance is added by the assembly of many parts. Clearance holes for securing the pivot plates with screws also add additional tolerance. Screws require multi-directional assembly instead of the desired uni-directional assembly, which adds labor costs.
Furthermore, screws inherently increase part count to a product, which is also undesirable. Whatever means is used to align the catcher to the eyelid assembly, the more precise an alignment is, the better the eyelid operates.
It is seen then that there exists a need for a precise eyelid assembly registration means which can be used with continuous ink jet printheads.
Summary of the Invention This need is met by the registration system and method according to the present 2s invention, wherein mounts and linkage for locating an eyelid assembly for a continuous ink jet printhead are precisely registered. The precision design establishes a direct locational relationship between the catcher and the eyelid assembly. This accuracy is assured by eliminating screws and their clearance holes, and by fixturing directly to the catcher via precise alignment apertures in the bottom of the catcher.
In accordance with one aspect of the present invention, an eyelid assembly is precisely CA 022039~4 1997-04-29 aligned to a catcher in a continuous ink jet printhead. An eyelid linkage mechanism associated with the eyelid assembly, fastens to the ink jet printhead to provide pivot areas that allow the eyelid assembly to rotate in and out of the catcher.
A fixture precisely holds and locates the eyelid linkage mechanism to accurately register the eyelid assembly to the catcher. The eyelid linkage mechanism is bonded to the printhead frame in reference to the catcher, to provide the pivot areas that allow the eyelid assembly to rotate in and out of the catcher. The accurately registered eyelid assembly is then secured to the eyelid linkage mechanism .
Accordingly, it is an obj ect of the present invention to provide precise registration of the linkage mechanism that locates an eyelid assembly to a continuous ink jet printhead. It is an advantage of the present invention to provide such a registration method and system wherein the optimum relationship between the catcher and eyelid assembly is realized.
Other objects and advantages of the invention will be apparent from the following description, the accompanying drawings and the appended claims.
Brief Description of the Drawinqs Fig . 1 is an exploded view of an ink j et printhead structure illustrating alignment between the ink jet printhead and the eyelid assembly, in accordance with the present inventioni and Fig. 2 illustrates achievement of the precision locational relationship of Fig. 1, between the eyelid assembly and the catcher, using a CA 022039~i4 l997-04-29 temporary f ixture .
Detailed Descri~tion of the Preferred Embodiments F~eferring to Figs. 1 and 2, precise registration between an eyelid assembly and a continuous ink jet printhead, according to the present invention, is shown. A typical ink jet printhead, generally designated 10, includes a resonator 2, a catcher 3, and an eyelid assembly 1.
An eyelid linkage mechanism, or pivot plates 4, fasten to and travel with the ink jet printhead 10. The pivot plates are bonded into place, such as with an instant adhesive that is wicked or placed between identified bond sites 8 of the eyelid linkage 4 and a printhead frame 5. The pivot plates provide pivot areas that allow the eyelid assembly 1 to rotate in-and-out of the catcher 3, thereby diverting ink from the resonator 2 when actuated into the ink path and sealing against the catcher 3. The eyelid assembly l can be disconnected from the printhead 10 by pulling a pivot pin 7, receivable into pivot apertures 13, from the eyelid assembly 1 and linkage plates 4.
The eyelid assembly 1 stays with the printer and the linkage plates go with the printhead.
Continuing with Figs. 1 and 2, the precision design according to the present invention succeeds by establishing a direct locational relationship between the catcher 3 and the eyelid assembly l. This accuracy is ensured by eliminating screws and their clearance holes, and by fixturing directly to the catcher 3 via precise alignment holes 6 located in the bottom of the catcher 3.
Fixture 9 precisely holds and locates the eyelid links 4, and accurately registers to the catcher CA 022039~4 1997-04-29 assembly via the catcher alignment holes 6 and associated mating pins 11. This creates the most accurate possible relationship between the eyelid assembly 1 and the catcher 3 by bypassing all of the hardware between these parts via the f ixture . A
bonding means can then be applied to bond sites 8, associated with the precisely aligned eyelid assembly 1 and catcher 3, to permanize the relationship between these parts. The bonding means can be any suitable means, including instant adhes ive .
Referring to Fig. 1, the bond sites 8 preferably have a surface finish of lO0-200 RMS to enhance mechanical interlocking of the bonding means. The printhead frame 5 utilizes capillary channels 12 to feed instant adhesive between the eyelid links 4 and the printhead frame 5 to the bond sites 8. An instant adhesive can be pre-applied to the printhead frame 5 or the eyelid links 4, as long as the positioning of the parts takes place before the adhesive dries, typically within 45 seconds.
Industrial ApplicabilitY and Advantaqes The present invention is useful in the field of ink jet printing, and has the advantage of maximizing print quality by allowing the print media to be particularly close to the printer. The present invention provides the further advantage of providing a precisely registered sealing surface between the eyelid assembly and the printhead.
Finally, the registration system and method of the present invention provides the advantage of eliminating screws, thereby saving labor and 3 5 assembly costs .
CA 022039~i4 1997-04-29 Having descrlbed the invention in detail and by reference to the preferred embodiment thereof, it will be apparent that other modifications and variations are possible without s departing from the scope of the invention defined in the appended claims.
Claims (5)
1. A means for precisely aligning an eyelid assembly to a catcher in a continuous ink jet printhead comprising:
an eyelid linkage mechanism associated with the eyelid assembly;
a fixture for precisely holding and locating the eyelid linkage mechanism to accurately register the eyelid assembly to the catcher;
a bonding means for bonding the eyelid linkage mechanism to the printhead frame in reference to the catcher, to provide pivot areas that allow the eyelid assembly to rotate in and out of the catcher; and securement means to secure the accurately registered eyelid assembly to the eyelid linkage mechanism.
an eyelid linkage mechanism associated with the eyelid assembly;
a fixture for precisely holding and locating the eyelid linkage mechanism to accurately register the eyelid assembly to the catcher;
a bonding means for bonding the eyelid linkage mechanism to the printhead frame in reference to the catcher, to provide pivot areas that allow the eyelid assembly to rotate in and out of the catcher; and securement means to secure the accurately registered eyelid assembly to the eyelid linkage mechanism.
2. A means for precisely aligning an eyelid assembly to a catcher as claimed in claim 1 wherein the pivot areas comprise a pivot point where the eyelid rotates.
3. A means for precisely aligning an eyelid assembly to a catcher as claimed in claim 1 wherein the securement means comprises a pivot pin.
4. A means for precisely aligning an eyelid assembly to a catcher as claimed in claim 1 wherein the eyelid linkage mechanism is precisely held and located by the fixture that accurately registers to the catcher assembly via catcher alignment holes and associated mating pins.
5. A means for precisely aligning an eyelid assembly to a catcher as claimed in claim 1 wherein the fixture is temporary.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US64023596A | 1996-04-30 | 1996-04-30 | |
| US08/640,235 | 1996-04-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2203954A1 true CA2203954A1 (en) | 1997-10-30 |
Family
ID=24567398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2203954 Abandoned CA2203954A1 (en) | 1996-04-30 | 1997-04-29 | Means for locating an eyelid assembly to a continuous ink jet printhead |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0805031B1 (en) |
| JP (1) | JPH1034942A (en) |
| AU (1) | AU714037B2 (en) |
| CA (1) | CA2203954A1 (en) |
| DE (1) | DE69701163T2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6247781B1 (en) * | 1998-12-14 | 2001-06-19 | Scitex Digital Printing, Inc. | Ink jet printhead with an improved eyelid system |
| US9623689B1 (en) | 2016-05-24 | 2017-04-18 | Eastman Kodak Company | Modular printhead assembly with common center rail |
| US9566798B1 (en) | 2016-05-24 | 2017-02-14 | Eastman Kodak Company | Inkjet printhead assembly with repositionable shutter |
| US9527319B1 (en) | 2016-05-24 | 2016-12-27 | Eastman Kodak Company | Printhead assembly with removable jetting module |
| US9789714B1 (en) | 2016-10-21 | 2017-10-17 | Eastman Kodak Company | Modular printhead assembly with tilted printheads |
| US9962943B1 (en) | 2016-11-07 | 2018-05-08 | Eastman Kodak Company | Inkjet printhead assembly with compact repositionable shutter |
| US9969178B1 (en) | 2016-11-07 | 2018-05-15 | Eastman Kodak Company | Inkjet printhead assembly with repositionable shutter mechanism |
| US10052868B1 (en) | 2017-05-09 | 2018-08-21 | Eastman Kodak Company | Modular printhead assembly with rail assembly having upstream and downstream rod segments |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4305079A (en) * | 1979-09-24 | 1981-12-08 | International Business Machines Corp. | Movable ink jet gutter |
| US4266231A (en) * | 1979-11-01 | 1981-05-05 | International Business Machines Corp. | Ink jet with retractable electrode and secondary ink catcher |
| US4928115A (en) * | 1988-10-31 | 1990-05-22 | Eastman Kodak Company | Continuous ink jet printer having remotely operable print head assembly |
| US5475410A (en) * | 1992-03-19 | 1995-12-12 | Scitex Digital Printing, Inc. | Seal for ink jet printhead |
-
1997
- 1997-04-21 EP EP19970302695 patent/EP0805031B1/en not_active Expired - Lifetime
- 1997-04-21 DE DE1997601163 patent/DE69701163T2/en not_active Expired - Lifetime
- 1997-04-29 CA CA 2203954 patent/CA2203954A1/en not_active Abandoned
- 1997-04-30 JP JP11237897A patent/JPH1034942A/en not_active Ceased
- 1997-04-30 AU AU19932/97A patent/AU714037B2/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE69701163T2 (en) | 2000-09-14 |
| JPH1034942A (en) | 1998-02-10 |
| AU1993297A (en) | 1997-11-06 |
| EP0805031A1 (en) | 1997-11-05 |
| DE69701163D1 (en) | 2000-02-24 |
| AU714037B2 (en) | 1999-12-16 |
| EP0805031B1 (en) | 2000-01-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |