WO1989012258A2 - Method for fusing developed image - Google Patents
Method for fusing developed image Download PDFInfo
- Publication number
- WO1989012258A2 WO1989012258A2 PCT/NL1989/000040 NL8900040W WO8912258A2 WO 1989012258 A2 WO1989012258 A2 WO 1989012258A2 NL 8900040 W NL8900040 W NL 8900040W WO 8912258 A2 WO8912258 A2 WO 8912258A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- image
- roller
- fusing
- substrate
- fixing
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G13/00—Electrographic processes using a charge pattern
- G03G13/20—Fixing, e.g. by using heat
-
- 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
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2014—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using contact heat
- G03G15/2053—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating
- G03G15/2057—Structural details of heat elements, e.g. structure of roller or belt, eddy current, induction heating relating to the chemical composition of the heat element and layers thereof
Definitions
- the present invention relates generally to a imaging with toners and specifically to fusing of developed images.
- a light image of an original to be copied may be recorded in the form of an electrostatic latent image upon a photoconductive member.
- a developed image may then be obtained from the latent image by application of toner particles, which may be in the form of a finely powdered solid or in liquid phase-
- toner particles which may be in the form of a finely powdered solid or in liquid phase-
- One or both of the rollers is heated and in consequence heats and thereby fuses and fixes the image on the substrate, insofar as at least to some extent the image particles flow into the fibers or pores of the substrate.
- liquid toner based electrostatic imaging is known. The basic steps of the liquid toner process are:
- an electrostatic latent image e.g. on a photoconductive surface such as a plate or drum which has been sensitized by charging with a corona discharge and by exposure to light in the form of an image of an object - the charge is dissipated in exposed areas;
- the excess liquid toner and particles are removed from the image, by a step often referred to as "metering".
- This step may be carried out by use of an electrically biased reverse roller which also shears off the "fluffy" part of the imaged regions and squeezes or compacts the imaged area to prepare it for transfer.
- the transfer stage there is likely to occur a degree of smudging, smearing or squashing of the image, which detracts from its quality.
- heat and pressure are applied to the liquid toner image, as has been described above for solid toner based processes, the liquid image will be likely to again suffer from smudging, smearing or squashing.
- a degree of squash-resistance is imparted to the developed image by using fibrous toner particles prepared as follows: a thermoplastic polymer (and pigment) is plasticized with a nonpolar liquid, preferably at elevated temperature, to form a sponge, the sponge is shredded, more nonpolar liquid is added, the pieces of shredded sponge are wet-ground into particles and the grinding is continued to pull the particles apart to form fibers extending therefrom (the particles preferably having a diameter less than 5 microns) . Finally, a charge director may be added to impart a charge of predetermined polarity to the toner particles.
- a further object of the invention is to provide an improvement in the step in which heat and pressure are applied to fuse and fix the develope image in dry electrostatic imaging.
- Yet a further object of the invention is to provide in an electrostatic imaging process which makes use of liquid toner, a fixing and fusing step which includes the application of heat and pressure to the developed liquid toner image, while minimizing the possibility of smudging, smearing or squashing the developed image.
- Still a further object of the invention is to provide shaped articles which may be heated in a step of an electrostatic imaging process in which heat and pressure are applied to fuse and fix the developed image on a substrate, while minimizing offsetting the image.
- an imaging process which comprises the steps of developing an image with liquid toner including a liquid carrier and fusing and fixing the image by the application of energy thereto, an improvement comprising pre-selecting at least the following conditions: the energy applied upon fusing and fixing, and the properties of the liquid carrier, such that the liquid carrier is not substantially removed upon fixing and fusing.
- an electrostatic imaging process which comprises the steps of developing an electrostatic image with liquid toner including at least pigmented thermoplastic polymer particles and a liquid carrier, transferring the developed image to a substrate and subsequently fusing and fixing the substrate- supported developed image by the application of heat from the surface of an elastomer-coated first roller thereto, the surface being lubricated and the substrate being transported through a nip defined by a portion of the surface of the first roller and a portion of the surface of a second elastomer-coated roller located on the reverse side of the substrate, an improvement comprising pre-selecting at least the following conditions, namely, the temperature at which the fusing and fixing is effected, the rate of transport of the substrate, and the properties of the liquid carrier, such that the liquid carrier is not all substantially removed from the substrate-supported image.
- the process includes the step of transferring the image to a substrate.
- the step of transferring comprises the sub-steps of transferring the image first to an intermediate surface and from the intermediate surface to the substrate.
- the improvement comprises pre-selecting at least the conditions such that a major part of the liquid carrier is not removed upon fixing and fusing. Still further in accordance with a preferred embodiment of the present invention, at least about 50% by weight, or a substantial part, of the liquid carrier is not evaporated upon fixing and fusing.
- the application of energy is effected by applying a heated surface to the image or by applying a flash of radiation onto the image.
- the heated surface is the surface of an elastomer-coated roller or the surface of a continuous belt.
- the substrate is transported through a nip defined by a portion of the surface of the elastomer-coated roller defined as a first roller and a portion of the. surface of a second elastomer-coated roller located on the reverse side of the substrate, the coating of the second roller having a Shore A hardness less than that of the coating of the first roller.
- the coating of the second roller has a thickness greater than that of the coating of the first roller.
- the ratio of the thickness of the coating of the first roller to the ratio of the thickness of the coating of the second roller is smaller than 1:10.
- a composition of matter which comprises (A) a release coating silicone polymer, and (B) a soft silicone rubber formulation having a Shore A value of about 50 or less, the weight ratio of (A) to (B) being in the range of from about 1:1.5 to about 1:20, preferably about 1:3 to about 1:6.
- component (B) comprises an admixture of (i) about 1 to about 4 parts by weight of a curable silicone oil including curing agent therefor, (ii) about 10 parts by weight of a hard rubber forming room temperature vulcanizable silicone polymer, and (iii) sufficient silicone polymer curing agent to effect a cure of the component (ii) .
- the ratio of the components (i) : (ii) : (iii) is about 1-4: about 10: about 0.8-1.2, parts by weight.
- the apparatus for fusing and fixing onto a substrate a developed image transferred thereto subsequent to being formed by a liquid toner electrostatic imaging process, the apparatus comprising a first movable member comprising a material operative to substantially prevent offset of a developed image passing in contact with a first contact surface thereof, a second movable member defining a second contact surface, a portion of the second contact surface defining a nip with a portion of the first contact surface, means for elevating the temperature of the developed image as it passes in contact with the first contact surface so as to cause thereby at least partial fixing and fusing of the developed image, and means for.
- the apparatus also comprises means for wetting the first contact surface with a wetting liquid.
- a shaped article formed from a composition of matter and defining a surface, at least the surface being formed from a composition as above.
- an electrostatic imaging process which comprises the steps of generating a latent electrostatic image on a first substrate, developing the latent image with toner, transferring the developed image to a second substrate and fusing and fixing the image thereon by application of heat and pressure to the second substrate-supported image by contacting it under pressure with a curved surface of a heated shaped article which has been formed from a composition of matter as above. Further in accordance with a preferred embodiment of the present invention, the process also comprises the additional step of wetting the curved surface with a wetting liquid.
- the second substrate in the fusing and fixing step, is passed between the curved surface of the heated shaped article and a further curved surface defined by a shaped article formed from a soft rubber formulation.
- the ratio of the thickness of the shaped article formed from the composition of matter to the thickness of the shaped article formed from the soft rubber formulation lies within the range of about 1 to 30 - 80.
- the toner comprises powdered solid toner or liquid phase toner.
- Fig. 1 is a schematic illustration of electrostatic imaging apparatus, constructed and operative in accordance with a preferred embodiment of the invention
- Fig. 2 is a more detailed schematic illustration of apparatus for fusing and fixing a developed image onto a carrier sheet, useful in the apparatus of Fig. 1.
- FIG. 1 there is shown electrostatic imaging apparatus employing a liquid toner.
- the apparatus includes a metal drum 2 which carries a photoconductor 4 and which is mounted by disks 6 onto a shaft 8.
- the disks are secured to shaft 8 by a key 10 so that the shown drum assembly, which is provided in a light- proof housing (not shown) , is operative to rotate with shaft 8.
- Shaft 8 is driven in any appropriate manner (not shown) in the direction of arrow 9 past a corona discharge device 12 operative to charge the surface of photoconductor 4.
- the image to be reproduced is projected onto the charged photoconductor by an optical system 14. Since shaft 8 is grounded at 15 and disks 6 are conductive, the areas struck by light conduct the charge, or a portion thereof, to ground, thus forming on the photoconductor an electrostatic latent image.
- the liquid toner is circulated from any suitable source (not shown) through a pipe 16 into a development tray 18 from which it is drawn through a pipe 20 for recirculation.
- Development electrodes 22 which may be appropriately biased as known to the art, assist in toning the electrostatic latent image as it passes into contact with the toner.
- roller 24 As the amount of liquid on the photoconductor surface is normally too great for satisfactory subsequent transfer of the developed image, a roller 24, whose surface moves in a direction opposite to that of the photoconductor surface, is spaced from the photoconductor surface by a spacer 25 and is operative to shear excess liquid from the developed image without disturbing it.
- An exemplary roller is shown in U.S. Patent No. 3,907,423, the disclosure of which is incorporated herein by reference. Roller 24 is driven, typically by a drive belt 26 which is in turn driven by any appropriate, known speed- controllable motor means (not shown) . The roller is kept clean by a wiper blade 28.
- a pair of register rollers 32 and 34 is operative to feed to a transfer station, referenced generally 44, a carrier sheet 100, which is to receive the developed image.
- a corona discharge device 46 is operative to impress upon the rear of the carrier sheet a charge of polarity opposite to that of the toner particles forming the developed image. The developed image is thus drawn towards the carrier sheet.
- Rollers 32 and 34 are mounted onto and secured for rotation with respective axles 36 and 38.
- the axles are driven in synchronism so that there is no relative motion between the points of closest approach of the rollers 32 and 34 to each other.
- only one of the register rollers need be driven.
- a pick-off member 48 assists in the removal from the photoconductor of the carrier sheet bearing the developed image.
- a roller 50 co-acting with a plurality of flexible bands 52 mounted onto a plurality of rollers 54 delivers the carrier sheet to fusing and fixing apparatus, referenced generally 64. Apparatus 64 is described below in greater detail in conjunction with Fig. 2.
- a cleaning roller 56 formed of an appropriate synthetic resin as known in the art, is driven in a direction opposite to that of photoconductor 4, so as to scrub clean the surface thereof.
- insulating, nonpolar liquid may be fed through a pipe 58 to the surface of the cleaning roller 56.
- a wiper blade 60 completes the cleaning of the photoconductive surface. Any residual charge left on the photoconductive drum is extinguished by flooding the photoconductor surface with light from a lamp 62.
- Fig. 2 in which there is shown fusing and fixing apparatus, constructed and operative in accordance with a preferred embodiment of the invention.
- Carrier sheet 100 is fed in the direction of an arrow 66 and, with the assistance of a guide member 99, between a heated roller 68 and a pressure roller 70 (see also Fig. 1) .
- roller 68 is driven by any suitable means (not shown) and, as it rotates in a direction shown by arrow 72, it is also operative to cause rotation of roller 70 by friction.
- Roller 68 typically comprises a hollow metal cylindrical core in which is provided a heat source 69 which helps in fusing the developed image borne by the carrier sheet as it is drawn between rollers 68 and 70.
- the metal core of roller 68 is coated with a thin layer 71 of a synthetic material having a composition as described hereinbelow. It is a particular feature of the invention that the composition of the synthetic material of which layer 71 is formed is such that the occurrence of offset of a developed image coming into contact with the layer is negligible.
- Roller 70 comprises a cylindrical metal core 74 onto which there is mounted a sleeve 76 of a synthetic material having a hardness value of not greater than about 50 on the Shore A scale.
- a typical synthetic material is silicone rubber.
- the ratio of the thickness of layer 71 to thickness of sleeve 76 is typically in the range of 1 to 30 - 80.
- layer 71 may be 0.4 mm thick and sleeve 76 may be 20 mm thick.
- roller 68 Due to the difference in respective thicknesses of layer 71 and sleeve 76, roller 68 is much harder than roller 70. Consequently, when roller 70 presses against roller 68 along an axis 77, the surface of roller 70 becomes indented and a continuous contact length or 'nip' is formed between the rollers and between two points indicated by arrows A and B. It is appreciated that as the carrier sheet is drawn into the nip, it is of great importance in ensuring that effective fusing and fixing of the image on the sheet takes place without the image being squashed, smeared or smudged. There is provided, therefore, apparatus for adjusting the pressure between rollers 68 and 70.
- roller 70 While roller 68 preferably rotates about a fixed axis, roller 70 is mounted for rotation onto an adjustable axle 78 which is supported by a support arm 80.
- Support arm 80 is rotatably mounted at one end 81 thereof, about a fixed axis 82 and is further supported, at another end 83 thereof, by a spring 84. It will be appreciated that the stronger the spring, the greater the pressure that is imposed by roller 70 onto roller 68.
- the carrier sheet As the carrier sheet is drawn between rollers 68 and 70, heat applied to the sheet from source 69 is effective, in combination with the pressure applied to the sheet by the rollers, to fuse and fix the developed image onto the sheet.
- the sheet is fed between the rollers such that the developed image, shown generally at 101, contacts the surface of roller 68.
- the developed image shown generally at 101
- layer 71 has a material composition that virtually eliminates offset while not giving rise to squashing, smudging or smearing of the developed image when used in a liquid toner process. While it is expected that offset of the image onto roller 68 is negligible, there is provided, nonetheless, a stripper 85 for removing any slight offset deposits that do occur and for ensuring proper paper removal.
- a soft silicone rubber formulation is used for layer 71 of roller 68 and e.g. comprises an admixture of: (i) about 1 to about 4 parts by weight of a curable silicone oil including curing agent therefor; (ii) about 10 parts by weight of a hard rubber forming room temperature vulcanizable silicone polymer; and (iii) sufficient silicone polymer curing agent to effect a cure of component
- the ratio of components (i) : (ii) : (iii) being preferably about 1-4: about 10: about 0.8-1.2, parts by weight.
- components (i) , (ii) and (iii) are (i) RTV 910 ⁇ Manufactured by
- RTV 615B, RTV 63OB ⁇ Such components may be used in a weight ratio of, for example, about 2: 10: 1.
- a release coating silicone polymer provided on roller 68 is Syl-Off 7600 (cross-linkable with Syl-Off 7601 or Syl-Off 7048) , manufactured by Dow Corning (U.S.A.), in particular in a ratio of approximately 200 : 1 of Syl-Off 7600 to Syl-Off 7601 or a ratio of approximately
- weight ratios of release coating silicone polymer to soft silicone rubber formulation in the range of from about 1:1.5 to about 1:20 are believed to be generally operable, ratios of 1 : 3 to 1.6 give good results and it is presently preferred to use a weight ratio of about 1:4.
- the inventive composition of matter as defined herein is formed into a shaped article, the surface of this article has a reduced adhesitivity at elevated temperatures, as compared with the surface of such an article from a soft silicone rubber formulation only.
- Such an article, especially when possessing a curved surface is useful in the form of a roller, such as roller 68, or an endless band, as used in various electrostatic imaging processes.
- the application of heat and pressure in the fusing and fixing step of an electrostatic imaging process utilizing solid powdered toner is subject to the drawback that the developed image may, because of (inter alia) partial adhesion to the curved surface of the shaped article which it contacts, be undesirably reproduced by offsetting, as for example on heated roller 68 which, as described above, together with pressure roller 70 provides the required nip.
- the coating on roller 68 is made from the composition of the invention, its surface which when heated contacts the toner image is much less liable to offsetting than when using known compositions for this purpose.
- the composition of the present invention now makes possible for the first time, the introduction of a step including the application of heat and pressure, in such liquid phase toner processes, by analogy with a corresponding step in powdered solid toner processes.
- an electrostatic imaging process which includes the steps of generating a latent electrostatic image on photoconductor 4, developing the latent image with liquid toner from development tray 18, transferring the developed image to carrier sheet 100 and fusing and fixing the transferred image on the substrate by heat and pressure applied thereto preferably by passing it between rollers 68 and 70, roller 68 being formed from the novel composition of the present invention.
- the latent image may be developed by powdered, solid toner.
- Fig. 2 there is also provided apparatus for wetting heated roller 68 with silicone oil, such as 350F. It will be appreciated that wetting of roller 68 is important so as to prevent drying out of coating 71 thereon, due to oozing out from the rubber composition of a non-cross-linked silicone oil used therein, for example, RTV 910.
- the shown wetting apparatus comprises a wetting roller 86 which is mounted onto an adjustable axle 88, roller 86 being operative to rotate together with heated roller 68. There is also provided a spring-retained arm 90 which maintains contact between wetting roller 86 and roller 68 by applying pressure onto axle 88 in the direction of roller 68.
- Wetting roller 86 is kept moist by a liquid absorbing element 92 which communicates with a trough 94 and which is maintained in touching contact with roller 86.
- Element 92 may, for example, comprise a layer of velvet mounted on a support.
- Trough 94 is typically supplied with silicone oil to a depth that is sufficient to keep element 92 damp enough so as to moisten wetting roller 86.
- a doctor blade 110 presses against roller 86 to reduce liquid thickness to preferably approximately 7 microns.
- Liquid is provided to trough 94 from an external reservoir 96 and is pumped therefrom at a very slow rate, by means of a pump 98 and an entry conduit 102. Excess liquid in trough 94 drains therefrom back into reservoir 96 via an outlet conduit 104.
- a suitable toner solution for the process of the present invention may be prepared as follows. ELVAX II 5720 (Dupont) (1000 g.) and ISOPAR L (Exxon) (500 g.) are mixed together at a temperature of 90 +10° C for 1 hour, using a
- Example 1 The invention will now be illustrated by the following non-limitative Examples: Example 1
- a Savin V45 photocopier which was modified to incorporate at the fixing and fusing stage a hot roller system as described above at an optimum temperature of 120 +10°C for minimum offset, was operated with a substrate speed of about 314 mm./sec, with a pressure of 6 kg. applied at each side of the pair of rollers, and using the liquid toner prepared as above.
- the length of the nip was about 4 - 6 mm. Under these conditions the major part of the ISOPAR L in the toner image was retained therein, while fusing and fixing was achieved.
- Example 2_ A Savin 870 photocopier, having its internal fuser rendered inoperative, was used to generate copies on paper using the liquid toner prepared as described hereinabove. The copies were then subjected to flash illumination of about 0.75 Joule/cm 2 and 400 microsecond pulse duration. Under these conditions the major part of the ISOPAR L in the toner image was retained therein, while fusing and fixing was achieved. It will be appreciated by persons skilled in the art that the present invention is not limited to what has been particularly shown and described hereinabove. The scope of the present invention is limited, rather, solely by the claims which follow:
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fixing For Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Rolls And Other Rotary Bodies (AREA)
- Liquid Developers In Electrophotography (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE68921001T DE68921001T2 (en) | 1988-06-06 | 1989-06-05 | METHOD FOR FUSING A DEVELOPED IMAGE. |
EP89906818A EP0418300B1 (en) | 1988-06-06 | 1989-06-05 | Method for fusing developed image |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/202,687 US5270776A (en) | 1988-06-06 | 1988-06-06 | Method for fusing developed image |
US26886188A | 1988-11-08 | 1988-11-08 | |
US202,687 | 1988-11-08 | ||
US268,861 | 1988-11-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
WO1989012258A2 true WO1989012258A2 (en) | 1989-12-14 |
WO1989012258A3 WO1989012258A3 (en) | 1990-07-12 |
Family
ID=26897933
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL1989/000040 WO1989012258A2 (en) | 1988-06-06 | 1989-06-05 | Method for fusing developed image |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0418300B1 (en) |
JP (2) | JP3229308B2 (en) |
DE (1) | DE68921001T2 (en) |
WO (1) | WO1989012258A2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6146803A (en) * | 1991-03-28 | 2000-11-14 | Indigo N.V. | Polymer blend liquid toner compositions |
US6623902B1 (en) | 1991-03-28 | 2003-09-23 | Hewlett-Packard Indigo B.V. | Liquid toner and method of printing using same |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3795033A (en) * | 1969-10-17 | 1974-03-05 | Minnesota Mining & Mfg | Fixing process |
US3937919A (en) * | 1972-11-08 | 1976-02-10 | Oce-Van Der Grinten N.V. | Fixing device |
US4137340A (en) * | 1975-09-16 | 1979-01-30 | Agfa-Gevaert N.V. | Method for fixing electrophoretically formed toner images |
JPS56104364A (en) * | 1980-01-24 | 1981-08-20 | Ricoh Co Ltd | Fixing and drying device in wet type electrophotographic copier |
JPS58209768A (en) * | 1982-05-31 | 1983-12-06 | Showa Electric Wire & Cable Co Ltd | Silicone rubber roll |
JPS60176073A (en) * | 1984-02-22 | 1985-09-10 | Hokushin Ind Inc | Manufacture of heat-fixing roll of electrophotographic copying machine |
JPS61186975A (en) * | 1985-02-14 | 1986-08-20 | Ricoh Co Ltd | Oilless fixing roll |
EP0254498A1 (en) * | 1986-07-21 | 1988-01-27 | Xerox Corporation | A liquid carrier recovery system |
-
1989
- 1989-06-05 WO PCT/NL1989/000040 patent/WO1989012258A2/en active IP Right Grant
- 1989-06-05 DE DE68921001T patent/DE68921001T2/en not_active Expired - Fee Related
- 1989-06-05 JP JP50619389A patent/JP3229308B2/en not_active Expired - Lifetime
- 1989-06-05 EP EP89906818A patent/EP0418300B1/en not_active Expired - Lifetime
-
2001
- 2001-06-19 JP JP2001184606A patent/JP2002072740A/en active Pending
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3795033A (en) * | 1969-10-17 | 1974-03-05 | Minnesota Mining & Mfg | Fixing process |
US3937919A (en) * | 1972-11-08 | 1976-02-10 | Oce-Van Der Grinten N.V. | Fixing device |
US4137340A (en) * | 1975-09-16 | 1979-01-30 | Agfa-Gevaert N.V. | Method for fixing electrophoretically formed toner images |
JPS56104364A (en) * | 1980-01-24 | 1981-08-20 | Ricoh Co Ltd | Fixing and drying device in wet type electrophotographic copier |
JPS58209768A (en) * | 1982-05-31 | 1983-12-06 | Showa Electric Wire & Cable Co Ltd | Silicone rubber roll |
JPS60176073A (en) * | 1984-02-22 | 1985-09-10 | Hokushin Ind Inc | Manufacture of heat-fixing roll of electrophotographic copying machine |
JPS61186975A (en) * | 1985-02-14 | 1986-08-20 | Ricoh Co Ltd | Oilless fixing roll |
EP0254498A1 (en) * | 1986-07-21 | 1988-01-27 | Xerox Corporation | A liquid carrier recovery system |
Non-Patent Citations (6)
Title |
---|
PATENT ABSTRACTS OF JAPAN, Volume 10, No. 22 (P-424) (2079), 28 January 1986; & JP-A-60176073 (Hokushin Kogyo K.K.) 10 September 1985 * |
PATENT ABSTRACTS OF JAPAN, Volume 11, No. 12 (P-535) (2459), 13 January 1987; & JP-A-61186975 (Ricoh Co Ltd) 20 August 1986 * |
PATENT ABSTRACTS OF JAPAN, Volume 5, No. 154 (P-82) (826), 29 September 1981; & JP-A-5687073 (Showa Densen Denran K.K.) 15 July 1981 * |
PATENT ABSTRACTS OF JAPAN, Volume 5, No. 175 (P-88) (847), 11 November 1981; & JP-A-56104364 (Ricoh K.K.) 20 August 1981 * |
PATENT ABSTRACTS OF JAPAN, Volume 8, No. 147 (P-285) (1584), 10 July 1984; & JP-A-5946664 (Olympus Kogaku Kogyo K.K.) 16 March 1984 * |
PATENT ABSTRACTS OF JAPAN, Volume 8, No. 60 (P-262) (1497), 2 March 1984; & JP-A-58209768 (Showa Densen Denran K.K.) 6 December 1983 * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6146803A (en) * | 1991-03-28 | 2000-11-14 | Indigo N.V. | Polymer blend liquid toner compositions |
US6623902B1 (en) | 1991-03-28 | 2003-09-23 | Hewlett-Packard Indigo B.V. | Liquid toner and method of printing using same |
US7078141B2 (en) | 1991-03-28 | 2006-07-18 | Hewlett-Packard Development Company, Lp | Liquid toner and method of printing using same |
Also Published As
Publication number | Publication date |
---|---|
EP0418300B1 (en) | 1995-02-01 |
JPH04500414A (en) | 1992-01-23 |
JP2002072740A (en) | 2002-03-12 |
DE68921001T2 (en) | 1995-08-31 |
DE68921001D1 (en) | 1995-03-16 |
JP3229308B2 (en) | 2001-11-19 |
WO1989012258A3 (en) | 1990-07-12 |
EP0418300A1 (en) | 1991-03-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0254572B1 (en) | Liquid development copying machine | |
EP0244199B1 (en) | Roll fusing with liquid developer | |
JPH11503244A (en) | Double-sided image formation | |
JPS59102266A (en) | Thermal pressure type fixing apparatus | |
US4482241A (en) | Device and method for stripping developer from a photoconductive surface | |
US5233396A (en) | Intermediate transfer member having a low surface energy compliant structure and method of using same | |
US4065585A (en) | Renewable chow fuser coating | |
EP0639802B1 (en) | Electrostatographic reproduction apparatus with porous roller | |
EP0244198A2 (en) | Liquid development image fusing | |
US4530595A (en) | Toner cleaning method and apparatus in which voltage is impressed between electrostatic image holder and a film member | |
JP2002513478A (en) | Intermediate transfer element for liquid electrophotography | |
US5220384A (en) | Liquid developer based imaging machine using a developing electrode | |
US5270776A (en) | Method for fusing developed image | |
US4571059A (en) | Apparatus for transferring images of conductive toner powder | |
US4339194A (en) | Cold pressure fusing apparatus | |
EP0418300B1 (en) | Method for fusing developed image | |
US5262829A (en) | Composition of matter useful for fusing of developed images and method and apparatus using same | |
US5832352A (en) | Method and apparatus for increasing the mechanical strength of intermediate images for liquid development image conditioning | |
EP0559299A2 (en) | Imaging apparatus having liquid toner development station | |
US5001030A (en) | Method and means for transferring electrostatically charged image powder | |
US4014606A (en) | Reproduction machine with textured transfer roller | |
JPH07301997A (en) | Liquid developing electrophotographic device | |
JPH0522908B2 (en) | ||
JPS6281681A (en) | Image forming device | |
US4234248A (en) | Hot roll fuser |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A2 Designated state(s): JP |
|
AL | Designated countries for regional patents |
Kind code of ref document: A2 Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
AK | Designated states |
Kind code of ref document: A3 Designated state(s): JP |
|
AL | Designated countries for regional patents |
Kind code of ref document: A3 Designated state(s): AT BE CH DE FR GB IT LU NL SE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 1989906818 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 1989906818 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1989906818 Country of ref document: EP |