CN1105337C - Development apparatus for liquid electrophotographic printer - Google Patents
Development apparatus for liquid electrophotographic printer Download PDFInfo
- Publication number
- CN1105337C CN1105337C CN98115956A CN98115956A CN1105337C CN 1105337 C CN1105337 C CN 1105337C CN 98115956 A CN98115956 A CN 98115956A CN 98115956 A CN98115956 A CN 98115956A CN 1105337 C CN1105337 C CN 1105337C
- Authority
- CN
- China
- Prior art keywords
- developer solution
- sensitization band
- developing apparatus
- developer
- sensitization
- 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 - Fee Related
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Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/06—Apparatus for electrographic processes using a charge pattern for developing
- G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
- G03G15/11—Removing excess liquid developer, e.g. by heat
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Wet Developing In Electrophotography (AREA)
- Cleaning In Electrography (AREA)
Abstract
A development apparatus for a liquid electrophotographic printer includes a development roller for supplying a developer liquid to a development region of a photoreceptor belt on which a latent electrostatic image is formed by being exposed to light, a squeegee roller for forming a developer liquid film on the photoreceptor belt by removing the excess developer liquid of the developer liquid sticking to the development region, and a wrap-around developer liquid removal means having a cleaning blade being in contact with both edges of the photoreceptor belt beyond the development region for removing the developer liquid on both edges of the photoreceptor belt.
Description
Technical field
The present invention relates to a kind of developing apparatus of improved liquid electrophotographic printer, be used to adopt the peripheral developer solution removal device of simplification to remove the developer solution that remains in the sensitization belt edge effectively.
Technical background
Electromagnetic printer such as laser printer adopts the light-sensitive medium such as photosensitive drums or sensitization band that forms electrostatic latent image thereon.
Laser printer mainly is divided into wet type printer and dry type printer according to the type of the ink powder that is used for developing.The developer solution that uses in the wet type laser printer is the ink powder of predetermined color and the potpourri of volatile vehicle.
With reference to Fig. 1, traditional developing apparatus comprises annular sensitization band 110 and makes sensitization band 110 around specified path round-robin first, second and the 3rd roller 121,122,123.The 3rd roller 123 is the driven roller that is driven by the motor (not shown), and being used to rotate sensitization band 110, the second rollers 122 is guide roller, is used for preventing bending by the torsion of adjusting sensitization band 110.The battery charger cradle 135 that is used for charging to sensitization band 110 is near the motor segment of the sensitization band 110 between first roller 121 and second roller 122.In the motor segment of the sensitization band 110 between first roller 121 and second roller 122, be arranged alternately a plurality of laser scan units (LSU) 130 and a plurality of developing apparatus 140.Herein, a plurality of laser scan unit LSU130 according to versicolor picture signal by on the photosensitive region of sensitization band 110, forming electrostatic latent image to sensitization band 110 emission of lasering beam, the developer solution of the ink powder that a plurality of developing apparatuses 140 mix with liquid-carrier in the area applications that forms electrostatic latent image and be the ink powder image with the electrostatic latent image development with predetermined color.
The ink powder image is transferred on the paper 126 by transfer roll 124 by between first roller 121 and the transfer roll 124 time.Paper 126 carries out feeding between transfer roll 124 and pressure roller 125, and pressure roller 125 contacts with transfer roll 124 with constant compression force.
With reference to Fig. 2, developer roll 141, clearer 142, first and second compression rollers 144 and 146 are arranged on the upstream side of developing apparatus 140, and the developer solution 148 of colouring is contained in the downlink side of developing apparatus.Developer roll 141 is applied to developer solution 148 on the electrostatic latent image of sensitization band 110 formation, and electrostatic latent image is developed is the ink powder image.Developer solution 148 is supplied between developer roll 141 and sensitization band 110 by developer solution supply 143.Clearer 142 is removed the developer solution that remains in developer roll 141 surfaces.First and second compression rollers 144 and 146 are removed the unnecessary developer solution 148 that makes after electrostatic latent image develops.Be bonded at developer solution 148 on first and second compression rollers 144 and 146 by separating with 147 with the scraper plates 145 of first and second compression rollers 144 with 146 surface contacts.
The ink powder image of the sensitization band 110 that has developed then forms the film like ink powder image that contains some liquid-carrier by first and second compression rollers 144 and 146.By the 3rd roller 123 time, the liquid-carrier that contains in the ink powder image is removed by the dryer roll 171 by warm-up mill 172 heating.Dryer roll 171 absorption of residual are stayed sensitization band 110 lip-deep liquid-carriers, and the liquid-carrier that dryer roll 171 absorbs evaporates by warm-up mill 172, and are built in the recovery unit recovery of this device subsequently.
With reference to Fig. 3 and 4, developer roll 141 keeps being separated by preset distance with sensitization band 110, and when the direction rotation identical with sensitization band 110 rotation directions the developer of supplying 148 is coated on the sensitization band 110.At this moment, developer solution 148 is coated in developer roll 141 and has in the development district of same width.144 extrusion coatings of first compression roller in the district 115 of developing developer solution and form the developer solution film 149 of corresponding electrostatic latent image.Herein, the part developer solution is pressed to the both sides of the edge of sensitization band 110 owing to the compressional movement of first compression roller 144.The developer solution 151 at sensitization band 110 edges is by removing with second compression roller 146 of the direction rotation opposite with the rotation direction of sensitization band 110.In this process, the peripheral developer solution 151 that is bonded on second compression roller 146 is separated by second scraper plate 147 with 146 contacts of second compression roller.
First and second compression rollers 144 and 146 drive units by independent setting rotate, and enter or disengage by jacking gear (not shown) and sensitization band.In addition, scraper plate 145 and 147 corresponding first and second compression rollers 144 and 146 are provided with.Therefore, the structure of total system is very complicated.So when compression roller 144 and 146 wearing and tearing or when damaging, the step that system must be by complexity is the compression roller more to renew separately.
As mentioned above, because traditional developing apparatus has complicated structure, the dismounting of repairing and renewal part and assembling are all not too easy.In addition, the expense of the part of replacing such as compression roller is also very expensive.
Summary of the invention
For addressing the above problem, the object of the present invention is to provide a kind of developing apparatus of liquid electrophotographic printer, it has the structure of simplification and can effectively remove the developer solution that is bonded on the sensitization band.
Therefore, for achieving the above object, provide a kind of developing apparatus of liquid electrophotographic printer, have: developer roll, to the development district of the sensitization band that forms electrostatic latent image by exposure supply developer solution; Compression roller, be bonded at the unnecessary developer solution of developer roll and on the sensitization band, form the developer solution film by removal, it is characterized in that, this developing apparatus comprises peripheral developer solution removal device, it has the cleaning balde that contacts with the both sides of the edge of sensitization band outside the district of developing, be used to remove the developer solution of sensitization belt edge; And support, described cleaning balde is removably mounted on the support; And jacking gear, the described support of oscilaltion makes cleaning balde and sensitization band enter or disengage.
Description of drawings
Above-mentioned purpose of the present invention and advantage will be by the preferred embodiments that invention will be described in detail with reference to the attached drawing and are clearer, wherein:
Fig. 1 is for adopting the synoptic diagram of sensitization band as traditional developing apparatus of the liquid electrophotographic printer of light-sensitive medium;
Fig. 2 is the synoptic diagram that the inner structure of traditional developing apparatus among Fig. 1 is shown;
Fig. 3 is the partial exploded side view of the developing apparatus among Fig. 2;
Fig. 4 is the exploded front view of the developing apparatus among Fig. 2;
Fig. 5 is the schematic side view of the developing apparatus of liquid electrophotographic printer of the present invention;
Fig. 6 illustrates the partial side view that concerns between the element of developing apparatus among Fig. 5 and the sensitization band;
Fig. 7 is the perspective diagram of developing apparatus among Fig. 5;
Fig. 8 is the partial exploded view that is used for the peripheral developer solution removal device of developing apparatus of the present invention.
Embodiment
With reference to Fig. 5 and 6, the developer roll 541 that applies developer solution 548 to the sensitization band 110 that forms electrostatic latent image by exposure is arranged on the top of the developing apparatus 540 that contains developer solution 548.Rotation direction along sensitization band 110, be provided for removing the compression roller 544 that is bonded at the unnecessary developer solution 548 on the sensitization band 110 and have the peripheral developer solution removal device 560 of sensitization band cleaning balde 561, this removal device is used to remove the developer solution that remains in outer sensitization band 110 both sides of the edge, district of developing.
The cleaning balde 561 of periphery developer solution removal device 560 is by support 571 supportings.Support 571 is by the jacking gear lifting that describes below.Therefore, cleaning balde 561 can tactility light belt 110 or is separated with sensitization band 110.For avoiding sensitization band 110 owing to friction damages, sensitization band cleaning balde is preferably made by soft rubber material.
The developer solution supply 543 of supply developer solution is arranged on a side of developer roll 541 between developer roll 541 and sensitization band 110.The clearer 542 that removal is bonded at the developer solution 548 on developer roll 541 surfaces is arranged on the downside of developer roll 541.The compression roller cleaning balde 545 that removal is bonded at the developer solution 548 on compression roller 544 surfaces is arranged on the downlink side of compression roller 544.In a side of developing apparatus 540, i.e. the right side of figure is provided with to the laser scan unit (LSU) 130 that forms electrostatic latent image along the development district emission of lasering beam of the sensitization band 110 of loop running.
In this process, have only the ink powder image of Thinfilm pattern of the electrostatic latent image in the corresponding district of developing to be kept on the sensitization band 110.The ink powder image comprises some carriers, and carrier sucks dryer roll 151 by the 3rd roller 123, and the carrier that these dryer rolls 151 absorb is evaporated by warm-up mill 152 heating that contact with dryer roll 151.
With reference to Fig. 7, as mentioned above, the developer solution 548 that is bonded in the sensitization band 110 development districts 115 by developer roll 541 is removed, and does not comprise the amount of the developer solution of necessity that compression roller 544 developments are required.At this moment, carry on sensitization band 110 both sides 550 is extruded the peripheral developer solution that roller 544 extrudes and is removed by sensitization band cleaning balde 561.
The jacking gear of oscilaltion support 571 comprises CD-ROM drive motor 591, the camshaft 581 that is rotated by CD-ROM drive motor 591 and be installed in cam 582 on the camshaft 581.Camshaft 581 is arranged under the support 571.Cam 582 is installed on the camshaft 581, is used for moving up and down support 571 with cramp bar 572 actual contact of support 571 when rotated.Cam shaft gear 583 is installed in an end of camshaft 581, thereby cooperates and rotate with motor gear 592 on being installed in 591 of CD-ROM drive motor.
For removal is bonded at peripheral developer solution 551 on the sensitization band 110, CD-ROM drive motor 591 is driven and rotating cam axle 581.Along with camshaft 581 rotations, the support 571 that cooperates with cam 582 rises, and developer solution cleaning balde 561 correspondingly rises, thereby contacts with sensitization band 110.
With reference to Fig. 8, developer solution cleaning balde 561 is removably mounted on the support 571.For this reason, on support, be formed with insertion groove 573, thereby developer solution cleaning balde 561 can be inserted.In addition, developer solution cleaning balde 561 is fixed on the position of its insertion groove 573 that inserts support 571 by bolt 575.Therefore, bolt lockhole 562 and 574 is respectively formed on developer solution cleaning balde 561 and the support 572.
As mentioned above, because the developing apparatus of liquid electrophotographic printer of the present invention adopts the developer solution removal device with scraper plate of removing peripheral developer solution, thereby can remove peripheral developer solution effectively.In addition, because the developer solution removal device has the structure of simplification, the scraper plate of wearing and tearing can upgrade at an easy rate.And, owing to adopt the scraper plate more cheap, reduced the renewal cost of developer solution removal device than conventional extruded roller.
Claims (3)
1. the developing apparatus of a liquid electrophotographic printer has: developer roll (541), the development district supply developer solution of the sensitization band (110) that forms electrostatic latent image to passing through to expose; Compression roller (544) is bonded at the unnecessary developer solution in the district of developing and goes up formation developer solution film at sensitization band (110) by removal, it is characterized in that described developing apparatus comprises:
Periphery developer solution removal device (560), it has: the cleaning balde (561) that contacts with the both sides of the edge of sensitization band (110) outside the district of developing is used to remove the developer solution of sensitization belt edge; Support (571), described cleaning balde (561) are removably mounted on the support (571); And jacking gear, the described support of oscilaltion (571) makes cleaning balde (561) and sensitization band (110) enter or disengage.
2. developing apparatus as claimed in claim 1 is characterized in that, scraper plate (561) is made by soft rubber material.
3. developing apparatus as claimed in claim 1 is characterized in that, described support (571) comprises a cramp bar (572), and jacking gear comprises:
Drive unit (591);
Camshaft (581) by drive unit (591) rotation;
Be installed in the cam (582) on the camshaft (581),
Described cramp bar (572) can contact with cam (582) when cam (582) rotates and move up and down described support (571).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR18235/97 | 1997-05-12 | ||
| KR18235/1997 | 1997-05-12 | ||
| KR2019970018235U KR19990004966U (en) | 1997-07-10 | 1997-07-10 | Developing apparatus for wet electrophotographic printer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1205462A CN1205462A (en) | 1999-01-20 |
| CN1105337C true CN1105337C (en) | 2003-04-09 |
Family
ID=19505568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98115956A Expired - Fee Related CN1105337C (en) | 1997-07-10 | 1998-07-10 | Development apparatus for liquid electrophotographic printer |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0890886B1 (en) |
| KR (1) | KR19990004966U (en) |
| CN (1) | CN1105337C (en) |
| DE (1) | DE69810540T2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007093831A (en) * | 2005-09-28 | 2007-04-12 | Brother Ind Ltd | Image forming apparatus, image formation process unit and developing unit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4905047A (en) * | 1988-02-12 | 1990-02-27 | Ricoh Company, Ltd. | Wet type image forming apparatus |
| EP0852752A1 (en) * | 1995-09-29 | 1998-07-15 | Minnesota Mining And Manufacturing Company | Apparatus and method for removing developer liquid from an imaging substrate |
-
1997
- 1997-07-10 KR KR2019970018235U patent/KR19990004966U/en not_active Application Discontinuation
-
1998
- 1998-07-08 EP EP98305449A patent/EP0890886B1/en not_active Expired - Lifetime
- 1998-07-08 DE DE69810540T patent/DE69810540T2/en not_active Expired - Lifetime
- 1998-07-10 CN CN98115956A patent/CN1105337C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1205462A (en) | 1999-01-20 |
| DE69810540T2 (en) | 2003-08-14 |
| EP0890886B1 (en) | 2003-01-08 |
| KR19990004966U (en) | 1999-02-05 |
| EP0890886A1 (en) | 1999-01-13 |
| DE69810540D1 (en) | 2003-02-13 |
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|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030409 Termination date: 20160710 |
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| CF01 | Termination of patent right due to non-payment of annual fee |