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WO1994016364A1 - Appareil de revelation d'images latentes - Google Patents

Appareil de revelation d'images latentes Download PDF

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Publication number
WO1994016364A1
WO1994016364A1 PCT/NL1993/000010 NL9300010W WO9416364A1 WO 1994016364 A1 WO1994016364 A1 WO 1994016364A1 NL 9300010 W NL9300010 W NL 9300010W WO 9416364 A1 WO9416364 A1 WO 9416364A1
Authority
WO
WIPO (PCT)
Prior art keywords
image
developer
toner
roller
applicator
Prior art date
Application number
PCT/NL1993/000010
Other languages
English (en)
Inventor
Ishaiau Lior
Amiran Lavon
Ehud Chatow
Original Assignee
Indigo N.V.
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to DE69331288T priority Critical patent/DE69331288T2/de
Priority to JP51642894A priority patent/JP3510252B2/ja
Priority to SG9502007A priority patent/SG93172A1/en
Priority to EP97202298A priority patent/EP0813123B1/fr
Priority to EP93902581A priority patent/EP0678202B1/fr
Priority to CA002387333A priority patent/CA2387333C/fr
Priority to PCT/NL1993/000010 priority patent/WO1994016364A1/fr
Priority to EP01201102A priority patent/EP1117014B1/fr
Priority to CA002153311A priority patent/CA2153311C/fr
Priority to DE69317908T priority patent/DE69317908T2/de
Application filed by Indigo N.V. filed Critical Indigo N.V.
Priority to CA002387330A priority patent/CA2387330C/fr
Priority to KR1019950702816A priority patent/KR100305980B1/ko
Priority to US08/464,851 priority patent/US5610694A/en
Priority to AT93902581T priority patent/ATE164953T1/de
Priority claimed from CA002153311A external-priority patent/CA2153311C/fr
Publication of WO1994016364A1 publication Critical patent/WO1994016364A1/fr

Links

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
    • G03G15/10—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer
    • 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
    • G03G15/101—Apparatus for electrographic processes using a charge pattern for developing using a liquid developer for wetting the recording material

Definitions

  • the present invention relates to development apparatus in general and , more particularly , to latent image development apparatus in electrophotographic imaging systems .
  • BACKGROUND OF THE INVENTION The method of developing a latent image formed on a photoconductive surface by means of electrophoretic transfer of liquid toner is well known in the art. In this method, charged particles suspended in a non-polar insulating carrier liquid migrate under the influence of an electrostatic field and concentrate in an image forming configuration upon relatively charged or discharged areas of a photoconductive surface. The developed image is then transferred to a substrate, such as paper, either directly or by means of one or more intermediate transfer members.
  • SUBSTITUTESHEET development roller which is circumferentially surrounded by a net of fine mesh size.
  • the developer roller is urged against the latent image carrying surface of a drum and liquid toner, which is carried in the roller is squeezed out of the compressed sponge through the fine net.
  • Toner particles which are contained in the liquid toner are selectively deposited, by electrophoresis, onto the surface of the drum to form an image.
  • U.S. Patent 4,400,079 describes a liquid toner development system for developing a latent image on a photoreceptor that uses a non-contacting developer roller.
  • the development roller surface may move in the same direction as the photoreceptor surface or in the opposite direction.
  • a developer roller preferably made of resilient material, is urged against an image forming surface, such as a photoreceptor, that has an electrostatic latent image comprising image areas at a first voltage and background areas at a second voltage formed thereon.
  • the developer roller is coated with a relatively thin film of concentrated liquid toner material having a given layer thickness.
  • the developer is electrified to a voltage which is intermediate the first and second voltages.
  • the developer voltage is selected to cause only a portion of the layer thickness to transfer to the image areas of the latent image.
  • DMA density of toner particles per unit area
  • the thickness uniformity of the toner concentrate layer on the developer is improved by supplying the toner concentrate preferably from a sponge roller which is urged against the developer roller and which travels at a different speed from that of
  • SUBSTITUTESHEET the developer roller at the point of contact between the two rollers. Increased uniformity results even if the toner concentrate remaining on the developer roller is not removed from the roller before application of a new layer of toner concentrate.
  • DMA developed toner particle mass per unit area
  • the concentration of toner particles on the layer is increased by application of an electrified squeegee roller to the layer before the transfer to the imaging surface.
  • the applicator roller moves in a direction opposite to that of the developer roller at the point of contact between them.
  • the developer roller is coated by developing thereon a layer of toner particles by elect rophores is from liquid toner using a stationary plate type developer.
  • the coating step is fol lowed by squeegeeing the layer on the developer roller with a squeegee roller at a high voltage and with high pressure in order to remove a large portion of the liquid therein , before trans fer of all or a portion of the resultant thickness of the layer to the image forming surface.
  • the developer roller may be cleaned by a tandem roller system in which a first, biased squeegee, roller removes the toner particles from the developer roller ' by electrostatic transfer.
  • a second, sponge cleaning, roller removes the toner particles from the biased squeegee roller by abrasion, preferably aided by an electrostatic field.
  • SUBSTITUTESHEET toner is removed from the sponge roller by a blade which indents the surface of the sponge and scrapes the material which is extruded away.
  • a blade which indents the surface of the sponge and scrapes the material which is extruded away.
  • one or both of the squeegee-developer or squeegee-sponge surfaces is wetted by a cleaning liquid or dilute toner to aid in transfer and removal of the toner particles.
  • the toner so removed is preferably recycled and used for recoating the developer roller.
  • FIG. 1 is a schematic diagram of imaging apparatus constructed and operated in accordance with a preferred embodiment of the present invention
  • Fig. 2 is a more detailed schematic diagram of a developer assembly constructed and operated in accordance with a preferred embodiment of the present invention
  • Fig. 3 is a schematic diagram of a developer assembly illustrating an alternative cleaning system in accordance with a preferred embodiment of the invention.
  • DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS Reference is made to Figs . 1 and 2 which illustrate imaging apparatus constructed and operative in accordance with a preferred embodiment of the present invention.
  • the apparatus includes a drum 10 preferably having a cylindrical photoreceptor surface 16 made of selenium, a selenium compound, an organic photoconductor or any other suitable photoconductor known in the art.
  • drum 10 rotates in the direction indicated by arrow 13 and photoreceptor surface 16 is charged by a charger 18 to a general ly uni formly predetermined voltage , typically on the order of 1000 volts .
  • Charger 18 may be any type of charger known in the art, such as a corotron, a scorotron or a roller. Cont inued rotation of drum 10 brings charged photoreceptor surface 16 into image receiving relationship
  • SUBSTITUTE SHEET with an exposure device such as a light source 19, which may be a laser scanner (in the case of a printer) or the projection of an original (in the case of a photocopier).
  • Light source 19 forms a desired latent image on charged photoreceptor surface 16 by selectively discharging a portion of the photoreceptor surface, the image portions being at a first voltage and the background portions at a second voltage.
  • the discharged portions preferably have a voltage of less than about 100 volts.
  • Developer roller 22 preferably rotates in a sense opposite that of drum 10, as shown by arrow 13, such that there is substantially zero relative motion between their respective surfaces at the point of contact. Developer roller 22 is most preferably urged against drum 10.
  • developer roller 22 is formed with a metal core coated with, preferably, 1-2 mm of a soft elastomer material having a Shore A hardness of preferably 20-40.
  • this coating is made conductive, preferably, to a resistivity between 10 5 and 10 7 ohm-cm.
  • the conductive layer is either covered with a smooth elastomer layer or is formed by casting or other process to have a smooth surface, preferably better than N3.
  • the soft elastomer material which may be non-conductive, is coated with a very thin electroconductive layer, such as for example a metal or conducting lacquer layer, which is electrically attached to the metal core.
  • a very thin electroconductive layer such as for example a metal or conducting lacquer layer, which is electrically attached to the metal core.
  • This conductive layer is preferably covered by a thin (preferably 15 to 60 micrometer) layer of conducting polymer having a resistivity, preferably, between 10 7 to 10' ohm-cm.
  • drum 10 may be formed of a relatively resilient material, and surface 21 may be composed of either a rigid or compliant material. As described below, surface 21 is coated with a thin
  • S UBSTITUTESHEET layer of liquid toner which is preferably very highly concentrated liquid toner.
  • Developer' roller 22 itself is charged to a voltage which is intermediate the voltage of the charged and discharged areas on photoreceptor surface 16.
  • the difference in potential between developer roller 22 and surface 16 causes selective transfer of the layer of toner particles to surface 16 , thereby developing the latent image .
  • the layer of toner particles will be selectively attracted to either the charged or discharged areas of surface 16, and the remaining portions of the toner layer will continue to adhere to surface 21.
  • the voltage difference between the image portions of the latent image and the developer roller is reduced to a value at which only part of the thickness of the toner concentrate layer i s trans f erred f rom the developer roller to the image portions of the latent image .
  • the thickness of the layer that is transferred depends mainly on the charge per unit volume in the layer and depends only slightly on the local thickness or solids concentration of the layer. Thus, even if the layer on the developer roller is not uniform, the layer transferred to the image areas has a uni form DMA and thus a uni form optical density. This phenomenon is probably due to the following
  • the DMA can
  • control electronics 102 which is operative to control a
  • the preferred liquid toner of the invention is utilized at a concentration of 25-30% toner particles on the developer layer at a DMA of 0 . 2 mgm/cm 2 ( with variations of between about 0. 17 and 0. 25 mgm/cm 2 )
  • the transferred layer will preferably be about 0.15 mgm/cm 2 with worst case variations of less than ⁇ 10% .
  • a voltage difference between the image portion and the developer roller of 500-600 volts will result in complete transfer of the layer
  • a voltage difference of between 300 and 500 volts will result in the above-described more uniform partial transfer at a process speed of 50 mm/sec .
  • roller 22 is coated by an applicator assembly generally indicated by reference numeral 23.
  • Applicator assembly 23 includes a toner dispenser 62 which can be visualized as having the shape of a flute, i.e. a cylindrical tube having a plurality of holes at different locations along its longitudinal dimension, through which liquid toner is dispensed onto the surface 64 of an applicator roller 65.
  • Applicator 65 is preferably formed of a metal core 66 covered with a relatively thick layer 68 of a resilient open-cell foam (sponge), such as foamed polyurethane, which preferably contains conductive additives.
  • sponge resilient open-cell foam
  • the bulk resistivity of the polyurethane is between 10 7 and l ⁇ " ohm-cm.
  • surface 64 of applicator roller 65 is resiliently urged against surface 21 of developer 22, for example, by virtue of a spring 72 which acts upon the ends of core 66.
  • dispenser 62 is preferably forced into applicator roller 65 such that a depression is formed in the outer portion of applicator roller 65, thereby deforming surface 64.
  • the continuous deformation of surface 64 and compression of layer 68 is operative to open cells of layer 68 which may occasionally clog during the operation of developer assembly 23 and the successive release of the deformation is operative to fill the cells.
  • the necessary pressure for dispensing the toner is preferably supplied by a small pump (not shown) which pumps the toner from a toner container (not shown) at a preset pressure.
  • a small pump (not shown) which pumps the toner from a toner container (not shown) at a preset pressure.
  • Any suitable pump and any suitable container known in the art may be used for this purpose, as well as any other suitable means for providing the desired toner pressure (such as a pressured tank containing the desired liquid toner).
  • SUBSTITUTESHEET layer 68 returns to the container for reuse.
  • developer roller 22 and applicator roller 65 rotate in the same rotational direction ( indicated by arrows 13 and 70 in Fig . 2 , respectively ) , such that their surfaces move in opposite directions .
  • applicator roller 65 is operative to scrub surface 21 and to remove the residual toner (which normally remains after the selective transfer of toner to surface 16 ) on surface 21 while applying a new, homogeneous , toner layer to the surface electrophoretically .
  • the absolute velocity of surf ace 64 i s preferably approximately 2 - 3 times greater than that of surface 21.
  • roller 65 is preferably electrified by a D.C. source, to a different voltage than that of surface 21, in order to induce electrophoretic transfer of toner particles from roller 65 to surface 21.
  • the physical contact between the surfaces is operative more to squeegee and homogenize the applied layer of toner, rather than to apply the layer of
  • SUBSTITUTESHEET toner which is applied, as aforesaid, by electrophoresis.
  • the solids concentration of the toner rises considerably during the electrostatic application of the toner to surface 21.
  • a liquid toner of 5% - 10% solids concentration is supplied by dispenser 62 to roller 65. After application onto the developer roller, the layer has a solids concentration of between 15 and 20 percent.
  • applicator 65 may further or alternatively be connected to an a.c voltage source, which is operative to somewhat reduce the viscosity of the toner and generally to cause the deposition of a smoother layer on surface 21 of developer roller 22.
  • developer assembly 23 further includes a squeegee roller 78 in operative contact with roller 22 downstream of dispenser roller 65 and before roller 22 contacts drum 10.
  • squeegee roller 78 is electrified with a voltage comparable with that of applicator 65, such that the outer surface of the squeegee repels the charged particles of the toner layer on surface 21.
  • Squeegee roller 78 is also preferably resiliently urged against roller 22 such that liquid carrier is removed from the layer as it passes the squeegee roller.
  • the mechanical pressure and the electric repulsion of roller 78 are operative to squeegee the layer of toner, so that the layer is more condensed and uniform as the layer reaches image carrying surface 16.
  • the concentration of the toner layer can be adjusted to a desirable level.
  • the liquid toner is supplied to roller 78 at a concentration less than that required for optimal development of the latent image.
  • SUBSTITUTESHEET roller 78 is urged against surface 21 of developer roller 22, it mechanically removes excess toner fluid from the layer impressed on surface 21, and when charged with a suitable electric potential, it repels the charged toner particles and causes them to more closely adhere to surface 21. The excess fluid which has been removed is recovered for reuse.
  • the solids content of the layer is mainly a function of the mechanical properties of the rollers and of the applied voltages and pressures and is only slightly influenced by the initial concentration for a considerable range of initial toner concentrations.
  • squeegee roller 78 comprises an aluminum core which is anodized and coated with a thin layer (approximately 50 micrometers) of polyurethane.
  • a cleaning station 82 may be provided, which may comprise a sponge or a brush or similar apparatus, to remove the excess toner concentrate from surface 21 of developer roller 22. The toner so removed may then be pumped back for reuse, after mixture with fresh toner, through dispenser 62 into the sponge of applicator 65.
  • Cleaning station 82 preferably comprises a sponge roller 84, which is preferably formed of a resilient open cell material similar to that of layer 68 of roller 65.
  • Roller 84 is situated such that it resiliently engages a portion of surface 21 between the transfer area (i.e. the area of surface 21 engaged by surface 16) and the application area (i.e. the area of surface 21 engaged by surface 64), thereby removing residual toner from surface 21 before the application of new toner.
  • sponge 84 may be supplied with
  • Cleaning 110 comprises a tandem roller arrangement in which a first, biased squeegee, roller 112 removes residual toner particles from developer roller 22 by electrostatic transfer. To this end roller 112 is biased to a voltage that, in conjunction with the developer roller voltage, causes the charged toner particles to be attracted to roller 112.
  • the general construction of roller 112 is preferably, similar to that described above for roller 78.
  • a second, sponge cleaning, roller 114 removes the toner particles from the biased squeegee roller 112 by abrasion, preferably aided by an electrostatic field.
  • the toner is removed from the sponge roller by a blade 116 which indents the surface of the sponge and scrapes the material which is extruded away.
  • one or both of the squeegee-developer or squeegee-sponge surfaces is wetted by a cleaning liquid or dilute toner to aid in transfer and removal of the toner particles.
  • the toner removed by any of the methods is preferably recycled and used for recoating the developer roller.
  • Cleaning station 82 may be especially useful in the event the toner is of a type which becomes discharged by the electric fields in the interface between the surfaces of developer roller 22 and drum 10.
  • the latent image developed by means of the process described above may be directly transferred to a desired substrate from the image forming surface in a manner well known in the art.
  • an intermediate transfer member 40 which may be provided.
  • SUBSTITUTE SHEET 1 may be a drum or belt and which is in operative engagement
  • 15 40 is preferably aided by providing electrif ication of
  • 19 member 40 preferably has a conducting layer 44 underlying
  • an elastomer layer 46 which is preferably a slightly
  • reversal transfer is used.
  • the desired image is formed by the areas of toner concentrate which remain on surface 21 of developer roller 22 after the development of photoreceptor surface 16 , and developer roller 22 and not drum 10 which is then brought into operative association with an intermediate transfer member or a final substrate so as to obtain a print of the desired image .
  • Any preferred embodiment of the developer assembly described above may also be used in the context of this embodiment .
  • appl icator assembly 65 may be repl aced by a curved , electri f ied plate developer situated parallel to the surface of developer roller at about 6 o ' clock on the developer roller .
  • Liquid toner at about 1 - 10% sol ids concentration preferably, between 5-10% concentration is fed into the region between the plate and the developer roller and plates the developer roller with a layer having approximately 5-20% toner solids, preferably, 15-20% toner solids .
  • the squeegee roller is then operative to further concentrate the layer to the desired concentration for devel oping the l atent image .
  • i f cleaning station 49 a toner layer having a ⁇ 5% uniformity is presented to the image forming surface.
  • a preferred , but by no means limiting , liquid toner material for use in the present invention is prepared in the following manner: Compounding 865.4 g of Surlyn 1605 Ionomer (DuPont), 288.5 g Mogul-L carbon black (Cabot), 28.8 g Endurophtal blue BT583D (Cookson) and 17.3 g aluminum stearate (Merck) are blended for 20 minutes on a two roll mill heated to 150°C until the blend is homogeneous. The blended material is removed from the mill and shredded in preparation for the next step.
  • SUBSTITUTESHEET Plasticizing 2 Kg of the blended material and 2 Kg of Marcol 82 ( EXXON ) are heated for one hour in a double planetary mixer, without mixing .
  • the material is then mixed for 45 minutes at low speed and for 30 minutes at high speed.
  • the material is discharged, while still warm, from the mixer, shredded and ground in a cooled meat grinder in preparation for grinding.
  • Grinding-Size Reduction 690 g of plasticized material is ground together with 1610 g of Marcol 82 in an attritor charged with 3/16" carbon steel balls.
  • the material is ground at 250 RPM for 30 hours at 55°C ⁇ 3°C.
  • NVS non-volatile solids

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Wet Developing In Electrophotography (AREA)
  • Electrostatic Separation (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Cleaning In Electrography (AREA)

Abstract

Appareil de formation d'images comprenant une surface de formation d'images (16) sur laquelle est formée une image électrostatique latente comprenant des régions d'image chargées à une première tension et des régions de fond chargées à une deuxième tension; une surface de révélation (21) chargée à une troisième tension entre les première et deuxième tensions et dotée d'une deuxième surface poussée contre la surface de formation d'images au niveau d'une région de révélation, et adaptée pour coopérer avec cette surface; un ensemble applicateur (23) servant à appliquer sur la surface de révélation (21) une couche de toner liquide concentré comportant des particules chargées de toner et un liquide véhicule; un révélateur servant à révéler l'image latente en transférant de la surface de révélation (21) aux régions d'image de la surface de formation d'images (16) une portion de toner liquide inférieure à l'épaisseur totale de la couche de celui-ci, afin de former une image révélée sur ladite surface de formation d'images (16); et un appareil de transfert de l'image révélée de la surface de formation d'images à un substrat final.
PCT/NL1993/000010 1993-01-11 1993-01-11 Appareil de revelation d'images latentes WO1994016364A1 (fr)

Priority Applications (14)

Application Number Priority Date Filing Date Title
CA002153311A CA2153311C (fr) 1993-01-11 1993-01-11 Appareil de developpement d'images latentes
SG9502007A SG93172A1 (en) 1993-01-11 1993-01-11 Improved latent image development apparatus
EP97202298A EP0813123B1 (fr) 1993-01-11 1993-01-11 Dispositif de nettoyage pour enlever des particules de toner liquide
EP93902581A EP0678202B1 (fr) 1993-01-11 1993-01-11 Appareil de revelation d'images latentes
CA002387333A CA2387333C (fr) 1993-01-11 1993-01-11 Appareil de developpement d'images latentes
PCT/NL1993/000010 WO1994016364A1 (fr) 1993-01-11 1993-01-11 Appareil de revelation d'images latentes
EP01201102A EP1117014B1 (fr) 1993-01-11 1993-01-11 Appareil révélateur d'images latentes
DE69331288T DE69331288T2 (de) 1993-01-11 1993-01-11 Reinigungsvorrichtung zum Entfernen von geladenen Flüssigtonerpartikeln
JP51642894A JP3510252B2 (ja) 1993-01-11 1993-01-11 潜像を現像する装置
DE69317908T DE69317908T2 (de) 1993-01-11 1993-01-11 Entwicklungsapparat für ein latentes bild
CA002387330A CA2387330C (fr) 1993-01-11 1993-01-11 Appareil de developpement d'images latentes
KR1019950702816A KR100305980B1 (ko) 1993-01-11 1993-01-11 개선된잠상현상장치
US08/464,851 US5610694A (en) 1993-01-11 1993-01-11 Latent development apparatus for use in electrophotographic imaging system
AT93902581T ATE164953T1 (de) 1993-01-11 1993-01-11 Entwicklungsapparat für ein latentes bild

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
CA002153311A CA2153311C (fr) 1993-01-11 1993-01-11 Appareil de developpement d'images latentes
SG9502007A SG93172A1 (en) 1993-01-11 1993-01-11 Improved latent image development apparatus
EP97202298A EP0813123B1 (fr) 1993-01-11 1993-01-11 Dispositif de nettoyage pour enlever des particules de toner liquide
EP93902581A EP0678202B1 (fr) 1993-01-11 1993-01-11 Appareil de revelation d'images latentes
PCT/NL1993/000010 WO1994016364A1 (fr) 1993-01-11 1993-01-11 Appareil de revelation d'images latentes

Publications (1)

Publication Number Publication Date
WO1994016364A1 true WO1994016364A1 (fr) 1994-07-21

Family

ID=28046813

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NL1993/000010 WO1994016364A1 (fr) 1993-01-11 1993-01-11 Appareil de revelation d'images latentes

Country Status (6)

Country Link
EP (2) EP1117014B1 (fr)
AT (1) ATE164953T1 (fr)
CA (2) CA2387330C (fr)
DE (1) DE69331288T2 (fr)
SG (1) SG93172A1 (fr)
WO (1) WO1994016364A1 (fr)

Cited By (6)

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Publication number Priority date Publication date Assignee Title
WO1996013761A1 (fr) * 1994-10-28 1996-05-09 Indigo N.V. Rouleau racleur pour systemes de formation d'images
WO1996031809A1 (fr) * 1995-04-03 1996-10-10 Indigo N.V. Production d'image recto-verso
US6108513A (en) * 1995-04-03 2000-08-22 Indigo N.V. Double sided imaging
US6478485B1 (en) 1999-09-30 2002-11-12 Werner Kammann Maschinenfabrik Gmbh Process and apparatus for decorating articles
US7877046B2 (en) 2007-12-07 2011-01-25 Hewlett-Packard Development Company, L.P. Hard imaging devices and hard imaging methods
US9651892B2 (en) 2013-05-08 2017-05-16 Konica Minolta, Inc. Wet-type image forming apparatus

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JP3907496B2 (ja) * 2002-02-27 2007-04-18 キヤノン株式会社 現像装置、プロセスカートリッジおよび電子写真画像形成装置、ならびに現像剤収納容器とその組立て方法

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US4400079A (en) * 1980-09-24 1983-08-23 Savin Corporation Injection roller developer for electrophotographic copier and biasing system therefor
US4684238A (en) * 1986-06-09 1987-08-04 Xerox Corporation Intermediate transfer apparatus
US4974027A (en) * 1989-02-06 1990-11-27 Spectrum Sciences B.V. Imaging system with compactor and squeegee

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US3905331A (en) * 1970-11-05 1975-09-16 Ricoh Kk Means for precluding trailing of toner images in electrophotography of the wet type
US3955533A (en) * 1972-09-27 1976-05-11 Smith Ian E Squeegee roller system for removing excess developer liquid from photoconductive surfaces
US3815989A (en) * 1972-12-14 1974-06-11 Nashua Corp Electrophotographic copy systems
JPS5929868B2 (ja) * 1978-08-31 1984-07-24 キヤノン株式会社 静電像現像装置
JPS55137554A (en) * 1979-04-13 1980-10-27 Ricoh Co Ltd Squeeze roller for liquid development
JPH03152586A (ja) * 1989-11-09 1991-06-28 Ricoh Co Ltd 湿式複写機

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Publication number Priority date Publication date Assignee Title
CA990589A (en) * 1972-03-27 1976-06-08 Moore Business Forms Inc. Method of and means for rapid development of electrostatic images
US4400079A (en) * 1980-09-24 1983-08-23 Savin Corporation Injection roller developer for electrophotographic copier and biasing system therefor
US4684238A (en) * 1986-06-09 1987-08-04 Xerox Corporation Intermediate transfer apparatus
US4974027A (en) * 1989-02-06 1990-11-27 Spectrum Sciences B.V. Imaging system with compactor and squeegee

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1996013761A1 (fr) * 1994-10-28 1996-05-09 Indigo N.V. Rouleau racleur pour systemes de formation d'images
US5854960A (en) * 1994-10-28 1998-12-29 Indigo N.V. Squeegee roller for imaging systems
WO1996031809A1 (fr) * 1995-04-03 1996-10-10 Indigo N.V. Production d'image recto-verso
US6108513A (en) * 1995-04-03 2000-08-22 Indigo N.V. Double sided imaging
US6478485B1 (en) 1999-09-30 2002-11-12 Werner Kammann Maschinenfabrik Gmbh Process and apparatus for decorating articles
US6536346B2 (en) 1999-09-30 2003-03-25 Werner Kammann Maschinenfrabrik Gmbh Process and apparatus for decorating articles
US7877046B2 (en) 2007-12-07 2011-01-25 Hewlett-Packard Development Company, L.P. Hard imaging devices and hard imaging methods
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Also Published As

Publication number Publication date
EP1117014B1 (fr) 2005-09-14
SG93172A1 (en) 2002-12-17
EP1117014A2 (fr) 2001-07-18
EP0813123A3 (fr) 1998-01-14
CA2387333A1 (fr) 1994-07-21
CA2387330A1 (fr) 1994-07-21
ATE164953T1 (de) 1998-04-15
DE69331288T2 (de) 2002-07-18
CA2387330C (fr) 2005-12-06
CA2387333C (fr) 2006-05-16
DE69331288D1 (de) 2002-01-17
EP0813123A2 (fr) 1997-12-17
EP0813123B1 (fr) 2001-12-05
EP1117014A3 (fr) 2001-09-05

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