CN1950758A - Intermediate transfer blanket for use in electrophotographic printing - Google Patents
Intermediate transfer blanket for use in electrophotographic printing Download PDFInfo
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- CN1950758A CN1950758A CN 200580014139 CN200580014139A CN1950758A CN 1950758 A CN1950758 A CN 1950758A CN 200580014139 CN200580014139 CN 200580014139 CN 200580014139 A CN200580014139 A CN 200580014139A CN 1950758 A CN1950758 A CN 1950758A
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- intermediate transfer
- transfer blanket
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Abstract
An intermediate transfer blanket (12) for use in an electrophotographic imaging apparatus is provided which includes an inner body (44) portion having at least one reinforcing layer, and an outer body portion (46) having at least one reinforcing layer and an electrophotographic image transfer face, where the outer body portion is releasably securable to the inner body portion. The blanket construction allows the printing surface to be removed from the blanket and easily replaced in a cost effective manner.
Description
Technical field
The present invention relates to a kind of intermediate transfer blanket construction, and relate more particularly to a kind of improved intermediate transfer blanket that electrophotographic printing is used that is used for.
Background technology
In recent years, used program request (on-demand) the formula digital printer of electrophotographic system to obtain using very widely.In this system, toner image liquid or that do is formed on the photosensitive drums and electric subsequently being transferred to is used for the intermediate transfer blanket (flat or drum) of printing or is with on paper or roll web.Intermediate transfer blanket typically provides with sheet form, described coating be wound on make on drum or the cylinder opposed end of this coating by using machinery or bonding clamping system multiple method of attachment or use such as the method for attachment of the semipermanent adhesive backing of repositionable and/or pressure-sensitive bonding agent is fixing and go up in position.
But, be close to 100% image transfer printing because electrofax relies on, so the top layer of this coating typically is releasing layer.For example, in U.S. Patent No. 6,551, described a kind of intermediate transfer blanket in 716, its disclosure is hereby incorporated by, and the document has been taught a kind of coating body portion that comprises outside release coat.But, rapid deterioration of this releasing layer and because its composition and thickness former thereby can not use for a long time.The life-span of the releasing layer in the intermediate transfer blanket is typically less than 1,000,000 impressions, thereby generation abandons and/or change the needs of whole intermediate transfer blanket, and it has caused appreciable waste and cost.
Therefore, still have the needs to the improved intermediate transfer blanket of using in the electrophotographic printing application in the art, described improved intermediate transfer blanket provides the print quality that improves, and is simultaneously with low cost.
Technology contents
By being provided at the intermediate transfer blanket of using in the electrophotographic image forming, and make embodiments of the invention satisfy above-mentioned needs, described intermediate transfer blanket can be installed on the cylinder, and wherein printing surface can remove and change easily in mode with low cost from described coating.
According to an aspect of the present invention, provide a kind of intermediate transfer blanket of using in electrophotographic image forming, it comprises: the interior main part with at least one enhancement Layer; Have the outer main part of at least one enhancement Layer and the releasing layer with electrophotographic image transfer surface, wherein said outer main part is fixed on the described interior main part releasedly.
The enhancement Layer that comprises inside and outside main part preferably is selected from fabric, plastic sheeting, metal, screen cloth or glass fibre.Preferably, this enhancement Layer comprises woven fabric.This enhancement Layer preferably has the thickness of about 200-400 micron.
Outer main part preferably also comprises conductive layer that is positioned on the described enhancement Layer and the conformable layer that is positioned on the described conductive layer, and described releasing layer covers described conformable layer.This conductive layer preferably includes the polymeric material that is selected from acrylic elastomer, nitrile rubber, polyurethane rubber, vinyl or silicones, and comprises the conductive material that is positioned at wherein.This conductive material preferably includes carbon black.This conductive layer preferably has the resistance less than about 1000 kilo-ohms/square (kohms/square), and more preferably, is about 20-50 kilo-ohm/square resistance.
Conformable layer that should outer main part preferably includes Shore D level hardness less than about 70 polymkeric substance.Alternatively, this conformable layer can comprise polymeric layer, and described polymeric layer has the space that is positioned at wherein.This conformable layer can also comprise conductive material.
The releasing layer that is somebody's turn to do outer main part preferably includes silicone-based material.This releasing layer can also comprise conductive material.
In one embodiment of the invention, described outer main part may further include the restraining barrier that is positioned at below the conductive layer.In this embodiment of the present invention, described interior main part preferably further comprises the cushion that covers described enhancement Layer.This cushion preferably includes nitrile rubber, and preferably adheres on the enhancement Layer.This cushion preferably has the Shore A hardness of about 35-55.This cushion preferably has the space that is positioned at wherein.This cushion can also comprise conductive material.
In another embodiment of the present invention, described interior main part further comprises: cover the cushion of described enhancement Layer, the conductive layer that covers described cushion and the conformable layer that covers described conductive layer.In this embodiment, described outer main part only comprises described enhancement Layer and releasing layer.
In the above embodiment of the present invention, described intermediate transfer blanket preferably includes first and second ends and is the form of flat coating, and described flat coating is suitable for being wound on the blanket cylinder of image transfer apparatus and is fixed in the non-printing zone of this cylinder.
In optional embodiment of the present invention, described intermediate transfer blanket is gapless and is form of sleeve.In this embodiment, described coating preferably includes permanent adherence cushion on the main part in described.This cushion preferably includes nitrile rubber and can comprise the conductive material that is positioned at wherein.In this embodiment, the outer main part of described coating is the form with pipe of internal diameter, and is fixed to releasedly on the described interior main part to be enclosed within on the described interior main part and to allow described internal diameter to shrink to form press fit by radially enlarging described internal diameter.
Still in this embodiment, described in main part be form of tubes with internal diameter, and by enlarge described in main part internal diameter and allow this internal diameter to shrink to be fixed on the blanket cylinder to form press fit.Should interior main part preferably include a plurality of holes that are positioned at wherein, it allows air to pass to be used to enlarge described outer main part.
Intermediate transfer blanket of the present invention is constructed such that the user of electrophotographic printing apparatus can easily change the outer main part that comprises the image transfer surface at the scene and more preferably on the machine or near it.Therefore, when releasing layer has reached the terminal point in its serviceable life, no longer need whole transfer blanket is abandoned.
Description of drawings
Therefore, the feature of the embodiment of the invention provides a kind of intermediate transfer blanket that is used for electrophotographic printing, and it can be easily mounted on the cylinder, and wherein printing surface can remove and change in the cheap mode of expense from coating.Other features and advantages of the present invention will become apparent by following explanation, accompanying drawing and claims.
Fig. 1 is the synoptic diagram of electrophotographic image forming, it comprise be installed on the blanket cylinder, according to the intermediate transfer blanket of the embodiment of the invention;
Fig. 2 is wound on the cylinder and by the enlarged drawing of the fixing flat intermediate transfer blanket of fixed mechanism;
Fig. 3 is mounted in the cut-open view of the amplification and the simplification of the gapless intermediate transfer blanket on the blanket cylinder;
Fig. 4 A-4C has shown the partial sectional view that the different embodiment according to intermediate transfer blanket of the present invention cut open along Fig. 2 cathetus 3-3;
Fig. 5 has shown the partial sectional view that another embodiment of image transfer blanket of the present invention cuts open along Fig. 3 cathetus 4-4; With
Fig. 6 is the synoptic diagram that is installed on the gapless intermediate transfer blanket on the cylinder, and wherein said drum assembly and coating are shown as has the layer of cutting open for schematic purpose.
Embodiment
With reference now to Fig. 1,, it schematically illustrates the electrophotographic image forming system 10 of an embodiment who uses intermediate transfer blanket 12 of the present invention.In the prior art, system 10 comprises the photoelectric conductor layer 14 that typically is installed on the rotary drum 16.Make photoelectric conductor layer 14 charged by charging equipment 38.Make drum 16 around its rotation by (not shown)s such as motor.Toner or ink are applied on the photoelectric conductor layer 14 on the drum 16 by method suitable in the prior art.For example, in use the place of colour toners or ink is arranged, single color (for example cyan, yellow, fuchsin and black) can be applied on the described drum by applicator 30,32,34 and 36 respectively.
By imaging device 18, for example modulating lasering beam scanning device, the optical focusing device that is used for copying imaging on drum or other imaging devices well known in the prior art produce image to be reproduced.When the powered surfaces 20 of photoconductor 14 when being made described photoconductor discharge at least in part by the rayed zone, image to be reproduced is focused on by imaging device 18, thereby forms electrostatic latent image.
Fig. 2 has shown embodiments of the invention, and wherein intermediate transfer blanket is the form of flat, common rectangle coating 12, comprises inside and outside main part 44 and 46.The details of example structure that has shown the inside and outside main part of flat coating 12 among Fig. 4 A-4C as described below.As shown in Figure 2, described coating is wound on the blanket cylinder 22 and the end of this coating utilizes the mechanism that is positioned at an end to fix, and described mechanism comprises as U.S. Patent No. 5,745, the installation accessory 80 with installation supporting leg 82 described in 829, this patent is hereby incorporated by.Alternatively, the installation accessory that the end of the back side of main part and coating can utilize traditional semi-permanent adhesive or utilization to be positioned at two ends in described is fixed.During main part, described fixed mechanism can be unlocked and described outer main part is peeled off and replaced by new outer main part from interior main part outside people wish to remove.
Fig. 4 A has shown the cut-open view that an embodiment of described flat intermediate transfer blanket 12 cuts open along Fig. 2 cathetus 3-3.As shown in the figure, this coating comprises outer main part 46 and interior main part 44.Described outer main part 46 preferably includes enhancement Layer 53, conductive layer 54, covers the conformable layer 56 and the releasing layer 58 of described conductive layer.These layers can utilize coating bonding agent traditional in the prior art to adhere to each other.
Releasing layer 58 is preferably made by silicone-based material, and is more preferably made by the condensing type silicone material, and when described coating was installed on the blanket cylinder, described releasing layer was an outermost layer.Can use optional polymeric material, as long as they have selected toner or the required release characteristics of ink.Suitable polymeric material comprises compounded nitrile rubber, polyurethane rubber, vinyl, tygon, polyvinylidene fluoride and other fluoropolymers.
Shown in Fig. 4 A, interior main part 44 comprises enhancement Layer 60 and cushion 62.Enhancement Layer 60 is preferably by making such as the machine-processed fabric of cotton or NOMEX , and preferably has the thickness of about 200-400 micron.
Cushion 62 preferably includes nitrile rubber.This cushion preferably has less than about 85 Shore A hardness, and more preferably is the Shore A hardness of about 35-55.This cushion preferably has about 400 microns and about 1,500 micron thickness.This cushion preferably is loaded with carbon black to strengthen its electric conductivity.Cushion 62 preferably includes space (by volume being approximately 30-70%).The function of main part skew outside this cushion is carried out during printing operation and absorbed.This cushion preferably has and is no more than the compression zone that is about 20% (according to iso standard method 12636, part 4.4/4.5), but should be appreciated that demarcating compressed value will use according to concrete printing and change.This cushion and enhancement Layer can utilize traditional bonding agent to adhere to each other.
The enhancement Layer 60 of main part may further include the semi-permanent adhesive (not shown) in described, and it provides enough adhesion strengths so that should interior main part be fixed on the cylinder releasedly.
Fig. 4 B has shown optional embodiment of the present invention, and wherein said outer main part comprises the restraining barrier 51 between enhancement Layer 53 and conductive layer 54.This restraining barrier is preferably by preventing that solvent from penetrating the material that is pressed in the described interior main part with chemicals and constituting.The preferably anti-Isopar in this restraining barrier
TMAnd toner.Alternatively, enhancement Layer 53 can be made of the material that plays barrier function.The bottom of described outer main part may further include the semi-permanent adhesive (not shown) so that should outer main part can be fixed to releasedly on the interior main part.
Fig. 4 C has shown the optional embodiment of another one of the present invention, and its China and foreign countries' main part 46 comprises enhancement Layer 53 and releasing layer 58, and main part comprises enhancement Layer 60, cushion 62, conductive layer 54 and conformable layer 56 in described.
Fig. 3 has shown optional embodiment of the present invention, and wherein said intermediate transfer blanket is the form that is installed in no gap (seamless) blanket sleeve on the blanket cylinder 22.As shown in the figure, no gap transfer blanket sleeve 12 comprises basis (interior main body) part 44 and image transfer printing (outer main body) part 46.The CONSTRUCTED SPECIFICATION that has shown the preferred embodiment of transfer blanket 12 among Fig. 5.Gapless blanket comprises aforesaid interior main part 44 and outer main part 46, and wherein said outer main part comprises enhancement Layer 53, conductive layer 54, covers the conformable layer 56 and the releasing layer 58 of described conductive layer.Main part comprises aforesaid enhancement Layer 60 in described.In this embodiment of the present invention, described coating comprises the cushion 62 on the permanent adherence main part 44.
Fig. 6 has shown that gapless intermediate transfer blanket sleeve 12 is installed on the blanket cylinder 22.Each of described coating layer cut mode of cutting open gradually with left-hand side from figure shows, makes each main part to discern and to discuss.Hole 52 has only carried out showing and will in fact being positioned to be in line with hole 50 for schematic purpose.As shown in Figure 6, interior main part 44 is a hollow pipe form.According to the overall diameter of blanket cylinder assembly, described interior main part can have various diameters, length and thickness.
In this embodiment, on the internal diameter of main part 44 this main body is radially outward enlarged in preferably acting on, thereby be fixed on the blanket cylinder 22 by use such as compressed-air actuated pressurized source.For this reason, the end of blanket cylinder 22 is provided with a plurality of holes 50 and extends through its circumference, and described pore volume is received compressed gas source.As be known in the art, pressure optionally applies from the source that is connected to blanket cylinder.This installation method is described in commonly assigned U.S. Patent No. 6,799,511, and this patent is hereby incorporated by.
Outer main part 46 is detachably connected on the surface of interior main part 44.Main part can also be provided with the hole 52 of aliging with the hole 50 in the blanket cylinder 22 in described.By the gaseous tension that applies sufficient amount outer main part 46 is radially outward enlarged, thereby allow this outer main part temporarily to enlarge and slip over interior main part 44 on the cylinder 22.When described pressure discharged, described outer main part was contracted on the interior main part 44 and friction is fixed thereon.
When the imaging surface of gapless intermediate transfer blanket need be changed, interior main part 44 can remain on the blanket cylinder 22, and whole outer main part 46 can make its temporary transient expansion remove and at the scene it be changed by the final user by using gases pressure.
Above invention has been described with reference to preferred embodiment, it is evident that, it is possible improving without departing from the present invention and being out of shape.
Claims (31)
1. intermediate transfer blanket that is used for electrophotographic image forming comprises:
Interior main part comprises at least one enhancement Layer;
Outer main part comprises at least one enhancement Layer and the releasing layer with electrophotographic image transfer surface, and described outer main part is fixed on the described interior main part releasedly.
2. intermediate transfer blanket as claimed in claim 1 is characterized in that described enhancement Layer is selected from fabric, plastic sheeting, metal, screen cloth and glass fibre.
3. intermediate transfer blanket as claimed in claim 2 is characterized in that described enhancement Layer comprises woven fabric.
4. intermediate transfer blanket as claimed in claim 1 is characterized in that described enhancement Layer has the thickness of about 200-400 micron.
5. intermediate transfer blanket as claimed in claim 1 is characterized in that, described outer main part further comprises the conductive layer that covers described enhancement Layer, cover the conformable layer of described conductive layer and cover the releasing layer of described conformable layer.
6. intermediate transfer blanket as claimed in claim 5, it is characterized in that, described conductive layer comprises the polymeric material that is selected from acrylic elastomer, nitrile rubber, polyurethane rubber, vinyl and silicones, and described conductive layer comprises the conductive material that is placed in one.
7. intermediate transfer blanket as claimed in claim 5 is characterized in that described conductive material comprises carbon black.
8. intermediate transfer blanket as claimed in claim 5 is characterized in that described conductive layer has less than about 1000 kilo-ohms/square resistance.
9. intermediate transfer blanket as claimed in claim 5 is characterized in that, described conductive layer has about 20-50 kilo-ohm/square resistance.
10. intermediate transfer blanket as claimed in claim 5 is characterized in that, described conformable layer comprises that Shore D level hardness is less than about 70 elastic body.
11. intermediate transfer blanket as claimed in claim 5 is characterized in that, it is 30 Shore A hardness that described conformable layer has minimum.
12. intermediate transfer blanket as claimed in claim 5 is characterized in that, described conformable layer comprises the conductive material that is placed in one.
13. intermediate transfer blanket as claimed in claim 5 is characterized in that, described releasing layer comprises silicone-based material.
14. intermediate transfer blanket as claimed in claim 5 is characterized in that, described releasing layer comprises fluoropolymer.
15. intermediate transfer blanket as claimed in claim 5 is characterized in that, described releasing layer comprises the conductive material that is placed in one.
16. intermediate transfer blanket as claimed in claim 1 is characterized in that, described outer main part further comprises the restraining barrier.
17. intermediate transfer blanket as claimed in claim 1 is characterized in that, described interior main part further comprises the cushion that covers described enhancement Layer.
18. intermediate transfer blanket as claimed in claim 17 is characterized in that, described cushion comprises nitrile rubber.
19. intermediate transfer blanket as claimed in claim 17 is characterized in that, described cushion adheres on the described enhancement Layer.
20. intermediate transfer blanket as claimed in claim 17 is characterized in that, described cushion has the Shore A hardness of about 35-55.
21. intermediate transfer blanket as claimed in claim 17 is characterized in that, described cushion has the conductive material that is placed in one.
22. intermediate transfer blanket as claimed in claim 17 is characterized in that, has the space in the described cushion.
23. intermediate transfer blanket as claimed in claim 1 is characterized in that, described coating comprises first end and the second end, and described coating is suitable for being fixed in the non-printing zone of blanket cylinder.
24. intermediate transfer blanket as claimed in claim 1 is characterized in that, described in main part further comprise the conductive layer of the cushion that covers described enhancement Layer, the described cushion of covering and cover the conformable layer of described conductive layer.
25. intermediate transfer blanket as claimed in claim 1 is characterized in that, described coating is gapless.
26. intermediate transfer blanket as claimed in claim 25 comprises the cushion that sticks on the described interior main part.
27. intermediate transfer blanket as claimed in claim 26 is characterized in that, described cushion comprises nitrile rubber.
28. intermediate transfer blanket as claimed in claim 26 is characterized in that, described cushion comprises the conductive material that is placed in one.
29. intermediate transfer blanket as claimed in claim 25 is characterized in that, described outer main part has internal diameter and is fixed to releasedly on the described interior main part to be enclosed within on the described interior main part by enlarging described internal diameter.
30. intermediate transfer blanket as claimed in claim 25 is characterized in that, described interior main part has internal diameter and is fixed on the blanket cylinder by the described internal diameter that enlarges described interior main part.
31. intermediate transfer blanket as claimed in claim 25 is characterized in that, described interior main part comprises a plurality of holes that are positioned at wherein.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US56898104P | 2004-05-07 | 2004-05-07 | |
| US60/568,981 | 2004-05-07 | ||
| US11/124,430 | 2005-05-06 |
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| Publication Number | Publication Date |
|---|---|
| CN1950758A true CN1950758A (en) | 2007-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200580014139 Pending CN1950758A (en) | 2004-05-07 | 2005-05-09 | Intermediate transfer blanket for use in electrophotographic printing |
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| Country | Link |
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| CN (1) | CN1950758A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102712203A (en) * | 2010-03-30 | 2012-10-03 | 惠普发展公司，有限责任合伙企业 | Image transfer blanket |
| CN102725147A (en) * | 2010-02-23 | 2012-10-10 | 惠普发展公司，有限责任合伙企业 | Removable top blanket |
| CN103402775A (en) * | 2011-03-07 | 2013-11-20 | 惠普发展公司，有限责任合伙企业 | Intermediate transfer members |
| CN114261196A (en) * | 2021-11-25 | 2022-04-01 | 重庆康佳光电技术研究院有限公司 | Printing jig and connecting line printing method |
-
2005
- 2005-05-09 CN CN 200580014139 patent/CN1950758A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102725147A (en) * | 2010-02-23 | 2012-10-10 | 惠普发展公司，有限责任合伙企业 | Removable top blanket |
| CN102712203A (en) * | 2010-03-30 | 2012-10-03 | 惠普发展公司，有限责任合伙企业 | Image transfer blanket |
| CN103402775A (en) * | 2011-03-07 | 2013-11-20 | 惠普发展公司，有限责任合伙企业 | Intermediate transfer members |
| CN114261196A (en) * | 2021-11-25 | 2022-04-01 | 重庆康佳光电技术研究院有限公司 | Printing jig and connecting line printing method |
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