CA1204471A - Imaging method and apparatus - Google Patents
Imaging method and apparatusInfo
- Publication number
- CA1204471A CA1204471A CA000414670A CA414670A CA1204471A CA 1204471 A CA1204471 A CA 1204471A CA 000414670 A CA000414670 A CA 000414670A CA 414670 A CA414670 A CA 414670A CA 1204471 A CA1204471 A CA 1204471A
- Authority
- CA
- Canada
- Prior art keywords
- nip
- resin coating
- coating
- image carrier
- transfer
- 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
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
- G03G13/14—Transferring a pattern to a second base
- G03G13/16—Transferring a pattern to a second base of a toner pattern, e.g. a powder pattern
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G7/00—Selection of materials for use in image-receiving members, i.e. for reversal by physical contact; Manufacture thereof
- G03G7/0006—Cover layers for image-receiving members; Strippable coversheets
- G03G7/002—Organic components thereof
- G03G7/0026—Organic components thereof being macromolecular
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Combination Of More Than One Step In Electrophotography (AREA)
- Electrostatic Charge, Transfer And Separation In Electrography (AREA)
- Fixing For Electrophotography (AREA)
- Laminated Bodies (AREA)
Abstract
ABSTRACT
A transparent transfer sheet carrier having a thin coating of compatible resinous material applied thereto, is brought into intimate engagement with an electro-photographic imaging member having a dry toned image developed thereon, laminated together under the influence of heat and pressure to form a laminate and the laminate is separated to provide the transparency consisting of the toned image embedded in the resinous coating below its surface, complete transfer being effected without loss of resolution or optical density.
A transparent transfer sheet carrier having a thin coating of compatible resinous material applied thereto, is brought into intimate engagement with an electro-photographic imaging member having a dry toned image developed thereon, laminated together under the influence of heat and pressure to form a laminate and the laminate is separated to provide the transparency consisting of the toned image embedded in the resinous coating below its surface, complete transfer being effected without loss of resolution or optical density.
Description
1~4~
This in~ention~relates genera Tao electrophotographic imaging methods and apparatus for making permanent transparencies for archival or for secondary usage such as for projection or the like. Gore p~ticularly, the invention concerns the provision ox an improved eIectrophbtographic imaging method and means including dry transfer of an electrostatically formed toned image under localized heat and pressure to a transfer medium comprising Arizona coated transparent sheet to form a high resolution transparency having the transferred image embedded within and below the surface of the coating carried by said sheet.
Various processes have been proposed for producing an image electrostatically upon a substrate, including photographic processes involving actinic exposure of a photosensitive material carried on a substrate or by exposing a charged electrophotographic member having a photo conductive surface coating or layer to radiation to produce an electrostatic latent image thereupon. This latent images rendered visible by application of dry toner particles thereto as in cascade type develop mentor by wet application thereto of a liquid toner suspension wherein the toner particles have electrophoretic properties.
The production of suitable transparencies commonly requires the skill of a trained technician and the substantial expenditure of money and time. Photographic reproduction processes require controlled exposure, development, washing and fixing of a light sensitive composition present one support with or without the intermediate production of a negative image.' Jo 447~
Xerographic processes have proven to be an easy and reliable techni~ue'for the production of transparencies.
Notwithstanding the desirability of these processes, drawbacks have been encouIItered in that the adherence of the image on the transparent support leaves machete be desired.
additionally, loss- of optical density and resolution is .' experienced when the toned image is transferred to a receiving member.
With the advent of the electxoph~ogxaphic member disclosed in US Patent 4,025,339, the achievement of heretofore impossible to obtain resolution Al capabilities became possible, Toned images were formed eIectrophotographically by applying a charge potential on the photoconductive'coating, expose the charged coating to-a radiation image, usually actinic light, toning of the resultant latent image and transferring the toned image onto a carries by electrically assisted methods. The carriers employed were paper or plastic sheet material.
The toning step was effected generally by 2Q. electrophoretic methods employing very finely divided particulate toner material suspended in an insulating liquid and attracted to the photo conductive surface by the charge magnitude of the latent image. Electrically assisted methods employing development electrodes and the like have been applied to achieve complete transfer. Normally, the toned image adheres to the photo conductive surface in accordance with the electrical field strength of the latent image until the toner either was fused onto the surface or transferred to the carrier material and used thereupon.
methods employed for transfer.convention~lly often resulted ~2~7~
in formation ox copies which lose a considerable degree of the ox~ginal optical density and could note transerxed with retention of the high degree of resolution capable of being achieved with'the'photoconductiYe coating of the' S patented eIectrophQtographic member. Toner particles had difficulty adhering as well as desired and may flake or chip off the surface to which they were transferred. The toner particles adhered to the surface only and were fused onto the surface. Lateral movement of the particles could lo ooze during transfer so that the'faithul reproduction of the ox~ginal image may be'di~ficu~t, if not impossible.
The particle size of toner particles desirably should be as small as possible in order to gain the most ~dvantage`o~ the novel patented ~lectxophotographi'c member.
Dry particles useful for toning purposes as by cascade tuning methods generally have a particle size which is too large. Toner particles of proper size are encountered in liquid suspensions and axe not available except in such suspensions. 'Pry tones normally are applied by way of squalled cascade systems normally bulky and expensive. The Tokyo facing the art Was to Cain the advantages of using a toner to achieve maximum resolution yet have the convenience of a dry transfer system. Adhesives have been employed as coatings for transfer carriers but for many reasons have I not been widely accepted since they normally require curing to eliminate distortion of the transferred image both initially and in subsequent handling and storage. Also, complete transfer is difficult to achieve. Toner material may be left on the Aztecs electrophQtographic member so that the member cannot be immediately reused.
447~
It is important in Mooney iodize of use such as microfilm or microfiche reproduction to acquire the maximum resolution of the image. Thus of the patented film as archival material has been possible and in act sought in order to gain advantage of the resolution capabilities of the said material. Of disadvantage is the photocanductive coatings employed within the-scope ox the patented eIectxophotographic material which generally have a characteristic tint.
When the photo conductive coating is cadmium sulfide, these is a characteristic yellow color. Of disadvantage also is the relatively high cost of the electrophotoconductive material. Using conventional methods, one could transfuser the toned image to lo txan~parent plastic sheet material but adherence was not satisfactory. Resolution and optical density retention was reduced during transfer. disavow coatings have been suggested but have not been satisfactory to the extent desired dun to "blocking" tendencies, that is the tendency of coated sheets to adhere to superposed like coated sheets, difficulties encountered in coating the adhesive materials, the lack of satisfactory light transoms characteristics of the coated material, axing and loss of adhesiveness of the coating, peeling ox flaking of the coating from the substrate.
One problem involved in the achievement of transfer of the toned image from the electrophotographic material to a coated transfer medium is the transport without damage or disturbance of the toner image.
Conventional transfer media require that the transferred toner image be fixed or fused to the receiving surface 44~
subsequent to receipt thereon. This rickshaws performance of another function upon the transfer medium, requiring more time and expense, as well as complex mechanisms. The transparent transfer media which Jay be conventionally employed as well as the types of fusible toner available for use may distort the transferred image as the same is being transported through the apparatus. Materials may be ove~coated upon the transfixed image to aid in binding the same to the undersurface. on addition to the presence of still another layer, there would have'to'be'deleterious effect of such material upon the transparency of the finished product, the flexibility thereof, etc.
~ccoxdingly, the invention provides a method of forming a transparency electrostatically wherein a toned image is formed electrostatically on an electrophotographic member and transferred to a transparent transfer medium, said method comprising the steps of providing a transfer medium which consists of a transparent substrate carrying a thin surface coating of a resinous composition compatible with said substrate and bonded thereto, bringing together said film member and the transfer medium simultaneously with application of sufficient heat locally to soften the resinous coating, applying localized pressure to the engaged film member carrying the toned image and softened coating of the transfer medium to laminate same and thereafter separating said laminated transfer medium and electrophotographic member, the toner image being issue embedded within said coating and remaining with's aid transfer medium upon separation, the transfer being effected without loss in resolution or optical density.
Further, the invention also provides toe apparatus comprising first and second rollers arranged to define a nip, feed means for directing an electrostatically formed dry-toner image carrier and a transfix member simultaneously to said zip, said transfer member formed of a transparent substrate having a heat softenable'resin coating bonded thereto and compatible therewith, the coating side facing the toned image carried by the carrier, heating means capable of locally softening thorazine coating, means for laminating said transfer member to said image carrier at said nip, means for cooling the laminate and jeans for separating the laminate, the toned image being transferred in its entirety to the coating of the transfer member when the laminate is separated, said toner image being embedded in said coating below its surface without loss in resolution and optical density.
aye The preferred embodiments of this invention now will be described, by way of example,with'reference to the drawings accompanying this specification in which:
Figure 1 is a diagrammatic representation of the dry transfer process according to the invention, and Foggier is a fragmentary section illustrating the transparency resulting from the method of the invention The electrophotographic member preferably 'employed herein is that-described in US. Patent 4,025,339 ox Jay 24, 1977. The electrophotographic imaging process includes charting the photo conductive surface of said ' electrophotographic member, imaging the chàxged success by exposure to a radiation pattern of the information to be imaged to form a latent charge image on said surface and developing said latent electrostatic image`~ith'toner material.
The toner employed comprises fine pigmented particles suspended in an insulating liquid medium. The toned image then is permitted to dry after application., Normally, the toned image would be fused to the surface of an electrophotographic member but in this invention, only drying ox the toned image is ejected.
Referring to the diagrammatic representation of the method and apparatus of the invention, in Figure 1 there is shown an electrophotographic member 10 formed as a sheet of substrate material 12 on which is applied a thin layer 14 of ohmic material. A thin coating 16 of microcrystalline photoconducti~e material is of sputter deposited under carefully controlled conditions in accordance with the teachings of US. 4,025,339. Generally the coating is from 3000 Angs~xoms to less than two microns in thickness. The 447~
coated substrate is charged at charging station 18 by corona generator device 20.'. The charged member is exposed to an actinic radiation pattern of information desired to be' reproduced at exposure station 22 and toned at developing station 24 using a suspension of non fusible toner material in an insulating liquid medium. The toned images dried at 26, . A pair of roller members 28 and 30 are arranged to define nope 32 to which a sheet of transfer 10. medium 34 is fed simultaneous with toned member 10. Roller 28 is heated to about 170C. Roller 30 is biased to exert a pressure of 60 pounds pox square inch at the nip 32.. Roller 28' may butted sofas to function as the hoeing roller with:
roller 30 functioning to back up pressure roller 30 and define the nip 32, Where roller 28 is the sole heating roller, roller 28' functions as an idler roller. In any event the resin coating is softened sufficiently at or prior to the nip 32 to enable the toned image to be compressed whereunto.
The transfer sheet 34 comprises a transparent thin sheet 36 of polyester polymer material manufactured and sold under the trademark MYLAR by the Dupont Company of Wilmington, Delaware. The transfer sheet 34 has an overreacted layer 38 formed of compatible resinous material bonded permanently to one surface thereof. preferable coating .
material is a thermoplastic polyester resin composition coated on the sheet of Mylar by conventional coating methods. The preferred coating material has a softening range of about 140 and can be selected from polyester resins compatible with' Mylar such as Nos. 46950, 46983 or.49000..sold by Dupont 0 Company (Wilmington, Delaware) or one of. Vitel~resins PI 200, I YO-YO
~Z~4~7~
PI 207, PI 222, VIE 4$83~ or VIE 5545~ (Go~dyeax).
As an alternative to heating the roller 28, a hot air vent 40 (brazen outline) may be disposed adjacent the nip 32 to heft the coating proximate to the line of contact between member lo and the transfer sheet 38 so as to soften the coating 38 without affecting the substrate.
The pressure roller 30 may ye formed of metal or of hard tubber of about 80 dormitory.
The resulting laminate is permitted to cool at 42 and then is peeled apart as at 44. Cooling before delamination lo nut mandatory. The toned image is transferred completely with no residue being left on the photo conductive coating 16 of member I The particles 46 transferred to sheet 34 are embedded in the coating 38 below its outer surface by being drawn therein while the coating was softened locally. The surface of sheet 34 after transfer is very smooth. Some particles of the toner even may migrate further into the interior of the coating 38, with some reaching the interface between the coating and the substrate and others simply gloating. Separation can be performed Molly or by conventional mechanical separator means.
Separation can be performed "hot".
This in~ention~relates genera Tao electrophotographic imaging methods and apparatus for making permanent transparencies for archival or for secondary usage such as for projection or the like. Gore p~ticularly, the invention concerns the provision ox an improved eIectrophbtographic imaging method and means including dry transfer of an electrostatically formed toned image under localized heat and pressure to a transfer medium comprising Arizona coated transparent sheet to form a high resolution transparency having the transferred image embedded within and below the surface of the coating carried by said sheet.
Various processes have been proposed for producing an image electrostatically upon a substrate, including photographic processes involving actinic exposure of a photosensitive material carried on a substrate or by exposing a charged electrophotographic member having a photo conductive surface coating or layer to radiation to produce an electrostatic latent image thereupon. This latent images rendered visible by application of dry toner particles thereto as in cascade type develop mentor by wet application thereto of a liquid toner suspension wherein the toner particles have electrophoretic properties.
The production of suitable transparencies commonly requires the skill of a trained technician and the substantial expenditure of money and time. Photographic reproduction processes require controlled exposure, development, washing and fixing of a light sensitive composition present one support with or without the intermediate production of a negative image.' Jo 447~
Xerographic processes have proven to be an easy and reliable techni~ue'for the production of transparencies.
Notwithstanding the desirability of these processes, drawbacks have been encouIItered in that the adherence of the image on the transparent support leaves machete be desired.
additionally, loss- of optical density and resolution is .' experienced when the toned image is transferred to a receiving member.
With the advent of the electxoph~ogxaphic member disclosed in US Patent 4,025,339, the achievement of heretofore impossible to obtain resolution Al capabilities became possible, Toned images were formed eIectrophotographically by applying a charge potential on the photoconductive'coating, expose the charged coating to-a radiation image, usually actinic light, toning of the resultant latent image and transferring the toned image onto a carries by electrically assisted methods. The carriers employed were paper or plastic sheet material.
The toning step was effected generally by 2Q. electrophoretic methods employing very finely divided particulate toner material suspended in an insulating liquid and attracted to the photo conductive surface by the charge magnitude of the latent image. Electrically assisted methods employing development electrodes and the like have been applied to achieve complete transfer. Normally, the toned image adheres to the photo conductive surface in accordance with the electrical field strength of the latent image until the toner either was fused onto the surface or transferred to the carrier material and used thereupon.
methods employed for transfer.convention~lly often resulted ~2~7~
in formation ox copies which lose a considerable degree of the ox~ginal optical density and could note transerxed with retention of the high degree of resolution capable of being achieved with'the'photoconductiYe coating of the' S patented eIectrophQtographic member. Toner particles had difficulty adhering as well as desired and may flake or chip off the surface to which they were transferred. The toner particles adhered to the surface only and were fused onto the surface. Lateral movement of the particles could lo ooze during transfer so that the'faithul reproduction of the ox~ginal image may be'di~ficu~t, if not impossible.
The particle size of toner particles desirably should be as small as possible in order to gain the most ~dvantage`o~ the novel patented ~lectxophotographi'c member.
Dry particles useful for toning purposes as by cascade tuning methods generally have a particle size which is too large. Toner particles of proper size are encountered in liquid suspensions and axe not available except in such suspensions. 'Pry tones normally are applied by way of squalled cascade systems normally bulky and expensive. The Tokyo facing the art Was to Cain the advantages of using a toner to achieve maximum resolution yet have the convenience of a dry transfer system. Adhesives have been employed as coatings for transfer carriers but for many reasons have I not been widely accepted since they normally require curing to eliminate distortion of the transferred image both initially and in subsequent handling and storage. Also, complete transfer is difficult to achieve. Toner material may be left on the Aztecs electrophQtographic member so that the member cannot be immediately reused.
447~
It is important in Mooney iodize of use such as microfilm or microfiche reproduction to acquire the maximum resolution of the image. Thus of the patented film as archival material has been possible and in act sought in order to gain advantage of the resolution capabilities of the said material. Of disadvantage is the photocanductive coatings employed within the-scope ox the patented eIectxophotographic material which generally have a characteristic tint.
When the photo conductive coating is cadmium sulfide, these is a characteristic yellow color. Of disadvantage also is the relatively high cost of the electrophotoconductive material. Using conventional methods, one could transfuser the toned image to lo txan~parent plastic sheet material but adherence was not satisfactory. Resolution and optical density retention was reduced during transfer. disavow coatings have been suggested but have not been satisfactory to the extent desired dun to "blocking" tendencies, that is the tendency of coated sheets to adhere to superposed like coated sheets, difficulties encountered in coating the adhesive materials, the lack of satisfactory light transoms characteristics of the coated material, axing and loss of adhesiveness of the coating, peeling ox flaking of the coating from the substrate.
One problem involved in the achievement of transfer of the toned image from the electrophotographic material to a coated transfer medium is the transport without damage or disturbance of the toner image.
Conventional transfer media require that the transferred toner image be fixed or fused to the receiving surface 44~
subsequent to receipt thereon. This rickshaws performance of another function upon the transfer medium, requiring more time and expense, as well as complex mechanisms. The transparent transfer media which Jay be conventionally employed as well as the types of fusible toner available for use may distort the transferred image as the same is being transported through the apparatus. Materials may be ove~coated upon the transfixed image to aid in binding the same to the undersurface. on addition to the presence of still another layer, there would have'to'be'deleterious effect of such material upon the transparency of the finished product, the flexibility thereof, etc.
~ccoxdingly, the invention provides a method of forming a transparency electrostatically wherein a toned image is formed electrostatically on an electrophotographic member and transferred to a transparent transfer medium, said method comprising the steps of providing a transfer medium which consists of a transparent substrate carrying a thin surface coating of a resinous composition compatible with said substrate and bonded thereto, bringing together said film member and the transfer medium simultaneously with application of sufficient heat locally to soften the resinous coating, applying localized pressure to the engaged film member carrying the toned image and softened coating of the transfer medium to laminate same and thereafter separating said laminated transfer medium and electrophotographic member, the toner image being issue embedded within said coating and remaining with's aid transfer medium upon separation, the transfer being effected without loss in resolution or optical density.
Further, the invention also provides toe apparatus comprising first and second rollers arranged to define a nip, feed means for directing an electrostatically formed dry-toner image carrier and a transfix member simultaneously to said zip, said transfer member formed of a transparent substrate having a heat softenable'resin coating bonded thereto and compatible therewith, the coating side facing the toned image carried by the carrier, heating means capable of locally softening thorazine coating, means for laminating said transfer member to said image carrier at said nip, means for cooling the laminate and jeans for separating the laminate, the toned image being transferred in its entirety to the coating of the transfer member when the laminate is separated, said toner image being embedded in said coating below its surface without loss in resolution and optical density.
aye The preferred embodiments of this invention now will be described, by way of example,with'reference to the drawings accompanying this specification in which:
Figure 1 is a diagrammatic representation of the dry transfer process according to the invention, and Foggier is a fragmentary section illustrating the transparency resulting from the method of the invention The electrophotographic member preferably 'employed herein is that-described in US. Patent 4,025,339 ox Jay 24, 1977. The electrophotographic imaging process includes charting the photo conductive surface of said ' electrophotographic member, imaging the chàxged success by exposure to a radiation pattern of the information to be imaged to form a latent charge image on said surface and developing said latent electrostatic image`~ith'toner material.
The toner employed comprises fine pigmented particles suspended in an insulating liquid medium. The toned image then is permitted to dry after application., Normally, the toned image would be fused to the surface of an electrophotographic member but in this invention, only drying ox the toned image is ejected.
Referring to the diagrammatic representation of the method and apparatus of the invention, in Figure 1 there is shown an electrophotographic member 10 formed as a sheet of substrate material 12 on which is applied a thin layer 14 of ohmic material. A thin coating 16 of microcrystalline photoconducti~e material is of sputter deposited under carefully controlled conditions in accordance with the teachings of US. 4,025,339. Generally the coating is from 3000 Angs~xoms to less than two microns in thickness. The 447~
coated substrate is charged at charging station 18 by corona generator device 20.'. The charged member is exposed to an actinic radiation pattern of information desired to be' reproduced at exposure station 22 and toned at developing station 24 using a suspension of non fusible toner material in an insulating liquid medium. The toned images dried at 26, . A pair of roller members 28 and 30 are arranged to define nope 32 to which a sheet of transfer 10. medium 34 is fed simultaneous with toned member 10. Roller 28 is heated to about 170C. Roller 30 is biased to exert a pressure of 60 pounds pox square inch at the nip 32.. Roller 28' may butted sofas to function as the hoeing roller with:
roller 30 functioning to back up pressure roller 30 and define the nip 32, Where roller 28 is the sole heating roller, roller 28' functions as an idler roller. In any event the resin coating is softened sufficiently at or prior to the nip 32 to enable the toned image to be compressed whereunto.
The transfer sheet 34 comprises a transparent thin sheet 36 of polyester polymer material manufactured and sold under the trademark MYLAR by the Dupont Company of Wilmington, Delaware. The transfer sheet 34 has an overreacted layer 38 formed of compatible resinous material bonded permanently to one surface thereof. preferable coating .
material is a thermoplastic polyester resin composition coated on the sheet of Mylar by conventional coating methods. The preferred coating material has a softening range of about 140 and can be selected from polyester resins compatible with' Mylar such as Nos. 46950, 46983 or.49000..sold by Dupont 0 Company (Wilmington, Delaware) or one of. Vitel~resins PI 200, I YO-YO
~Z~4~7~
PI 207, PI 222, VIE 4$83~ or VIE 5545~ (Go~dyeax).
As an alternative to heating the roller 28, a hot air vent 40 (brazen outline) may be disposed adjacent the nip 32 to heft the coating proximate to the line of contact between member lo and the transfer sheet 38 so as to soften the coating 38 without affecting the substrate.
The pressure roller 30 may ye formed of metal or of hard tubber of about 80 dormitory.
The resulting laminate is permitted to cool at 42 and then is peeled apart as at 44. Cooling before delamination lo nut mandatory. The toned image is transferred completely with no residue being left on the photo conductive coating 16 of member I The particles 46 transferred to sheet 34 are embedded in the coating 38 below its outer surface by being drawn therein while the coating was softened locally. The surface of sheet 34 after transfer is very smooth. Some particles of the toner even may migrate further into the interior of the coating 38, with some reaching the interface between the coating and the substrate and others simply gloating. Separation can be performed Molly or by conventional mechanical separator means.
Separation can be performed "hot".
Claims (9)
1. method of forming a transparency electrostatically wherein a toner image is formed electrostatically on the photo-conductive surface of an electrophotographic member and transferred to a transparent transfer medium, said method comprising the steps of drying the toner image to exclude any liquid therefrom, providing a transfer medium which consists of a transparent substrate carrying a thin outer surface coating of a non-blocking, non-adhesive resinous composition compatible with said substrate and bonded thereto, bringing together the photoconductive surface of said electrophotographic member and the transfer medium simultaneously with application of sufficient heat locally to soften the resinous coating, applying localized pressure to the photoconductive surface of the electrophotographic member carrying the toned image and to the transfer medium while the resinous coating is soft to transfer said dry toner image completely to the softened coating, and separating said transfer medium from the photoconductive surface of the electrophotographic member thereafter the toner image being embedded within said coating below the surface thereof upon separation, the transfer being effected without loss in resolution or optical density of the absence of any subsequent curing step.
2. The method according to claim 1 in which the transfer member is heated to soften the coating just prior to its engagement with said electrophotographic member.
3. The method according to claim 1 in which the transfer member is heated locally to soften the resin coating simultaneoulsy with application of pressure to adhere the coating to the electrophotographic member and the resulting laminate is cooled prior to separation.
4. The method according to any one of claims 1, 2, or 3 in which the transfer of the toner image is complete, the electrophotographic film member being free of toner residue subsequent to transfer.
5. Apparatus for practicing the method of any one of claims 1, 2 or 3 comprising first and second rollers arranged to define a nip, feed means for directing an electrostatically formed dry toner image carrier and a transfer member simultaneously to said nip, said transfer member formed of a transparent substrate having a heat softenable resin coating bonded thereto and compatible therewith, the coating side facing the toned image carried by the carrier, heating means capable of locally softening the resin coating, means for forcing the resin coating into engagement with said image carrier at said nip, means for cooling the engaged resin coating and image carrier and means for separating same.
6. Apparatus for practicing the method of any one of claims 1, 2, or 3 comprising first and second rollers arranged to define a nip, feed means for directing an electrostatically formed dry toner image carrier and a transfer member simul-taneously to said nip, said transfer member formed of a transparent substrate having a heat softenable resin coating bonded thereto and compatible therewith, the coating side facing the toned image carried by the carrier, heating means capable of locally softening the resin coating, means for forcing the resin coating into engagement with said image carrier at said nip, means for cooling the engaged resin coating and image carrier and means for separating same, said heating means are arranged to heat said transfer member sufficient to soften the resin coating just prior to the entry of the transfer member into the nip.
7. Apparatus for practicing the method of any one of claim 1, 2 or 3 comprising first and second rollers arranged to define a nip, feed means for directing an electrostatically formed dry toner image carrier and a transfer member simultaneously to said nip, said transfer member formed of a transparent substrate having a heat softenable resin coating bonded thereto and compat-ible therewith, the coating side facing the toned image carrier, heating means capable of locally softening the resin coating, means for forcing the resin coating into engage-ment with said image carrier at said nip, means for cooling the engaged resin coating and image carrier and means for separating same and the rollers defining said nip comprise a heated roller and a pressure roller.
8. Apparatus for practicing the method of any one of claims 1, 2 or 3 comprising first and second rollers arranged to define a nip, feed means for directing an electrostatically formed dry toner image carrier and a transfer member simultaneously to said nip, said transfer member formed of a transparent substrate having a heat softenable resin coating bonded thereto and compatible therewith, the coating side facing the toned image carried by the carrier, heating means capable of locally softening the resin coating, means for forcing the resin coating into engagement with said image carrier at said nip, means for cooling the engaged resin coating and image carrier and means for separating same, said heating means comprising a hot air blower positioned to direct heat on said resin coating just prior to the arrival of the transfer member at the nip.
9. Apparatus for practicing the method of any one of claims 1, 2 or 3 comprising first and second rollers arranged to define a nip, feed means for directing an electrostatically formed dry toner image carrier and a transfer member simultaneously to said nip, said transfer member formed of a transparent substrate having a heat softenable resin coating bonded thereto and compatible therewith, the coating side facing the toned image carried by the carrier, heating means capable of locally softening the resin coating, means for forcing the resin coating into engagement with said image carrier at said nip, means for cooling the engaged resin coating and image carrier and means for separating same, one of said rollers comprising a pressure roller formed of metal or of hard rubber of about 80 durometer hardness for effecting the engagement of the nip.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US31756381A | 1981-11-02 | 1981-11-02 | |
| US317,563 | 1994-10-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1204471A true CA1204471A (en) | 1986-05-13 |
Family
ID=23234246
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000414670A Expired CA1204471A (en) | 1981-11-02 | 1982-11-02 | Imaging method and apparatus |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0078476A3 (en) |
| JP (1) | JPS58105178A (en) |
| AU (1) | AU554814B2 (en) |
| CA (1) | CA1204471A (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU581957B2 (en) * | 1985-03-07 | 1989-03-09 | Minnesota Mining And Manufacturing Company | Multicolor toner images in electrography |
| JPH01241581A (en) * | 1988-03-23 | 1989-09-26 | Daiso Co Ltd | Fixing method for electrostatic print image |
| US4968578A (en) * | 1988-08-09 | 1990-11-06 | Eastman Kodak Company | Method of non-electrostatically transferring toner |
| JP2511825B2 (en) * | 1988-12-12 | 1996-07-03 | キヤノン株式会社 | Fixing device |
| JPH02158783A (en) * | 1988-12-13 | 1990-06-19 | Canon Inc | Image forming device |
| US5043242A (en) * | 1989-12-22 | 1991-08-27 | Eastman Kodak Company | Thermally assisted transfer of electrostatographic toner particles to a thermoplastic bearing receiver |
| US5037718A (en) * | 1989-12-22 | 1991-08-06 | Eastman Kodak Company | Thermally assisted method of transferring small electrostatographic toner particles to a thermoplastic bearing receiver |
| US5045424A (en) * | 1990-02-07 | 1991-09-03 | Eastman Kodak Company | Thermally assisted process for transferring small electrostatographic toner particles to a thermoplastic bearing receiver |
| US5102768A (en) * | 1990-03-12 | 1992-04-07 | Eastman Kodak Company | Transfer of high resolution toned images to rough papers |
| NL9100628A (en) * | 1990-04-17 | 1991-11-18 | Armstrong World Ind Inc | PROXIMITY PRINTING UNIT. |
| DE69220031T2 (en) * | 1991-10-03 | 1997-09-04 | Sony Corp | METHOD FOR IMAGING |
| US5424163A (en) * | 1991-10-03 | 1995-06-13 | Sony Corporation | Picture recording method using a dispersant having coloring agent particles contained therein |
| WO1994028466A1 (en) * | 1993-05-27 | 1994-12-08 | Fuji Photo Film Co., Ltd. | Method and apparatus for color image formation |
| US5648191A (en) * | 1995-02-24 | 1997-07-15 | Fuji Photo Film Co., Ltd. | Method for preparation of printing plate by electrophotographic process |
| GB2302310B (en) * | 1995-06-09 | 1999-02-03 | Fuji Photo Film Co Ltd | Method for preparation of printing plate by electrophotographic process |
| US5700612A (en) * | 1995-06-12 | 1997-12-23 | Fuji Photo Film Co., Ltd. | Method for preparation of printing plate by electrophotographic process |
| JP5929806B2 (en) * | 2013-03-25 | 2016-06-08 | 富士ゼロックス株式会社 | Transfer device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB893105A (en) * | 1957-12-24 | 1962-04-04 | Commw Of Australia | Improvements to electrophotographic reflex and contact printing |
| US3685896A (en) * | 1966-11-21 | 1972-08-22 | Xerox Corp | Duplicating method and apparatus |
| UST879009I4 (en) * | 1970-04-23 | 1970-10-13 | Method op transferring an electrostatically formed image | |
| GB1508311A (en) * | 1974-05-21 | 1978-04-19 | Agfa Gevaert | Fixing of toner images |
| NL179851C (en) * | 1976-03-18 | 1986-11-17 | Oce Van Der Grinten N V P A Oc | DEVICE FOR TRANSFERRING AND FIXING IMAGES. |
| JPS52135735A (en) * | 1976-05-08 | 1977-11-14 | Hitachi Ltd | Preparation of microfilm capable of add-on |
| DE2644089A1 (en) * | 1976-09-30 | 1978-04-06 | Celfa Ag | FILM FOR ELECTROSTATIC REPROGRAPHY |
-
1982
- 1982-10-24 EP EP82109829A patent/EP0078476A3/en not_active Ceased
- 1982-11-01 AU AU90055/82A patent/AU554814B2/en not_active Ceased
- 1982-11-02 CA CA000414670A patent/CA1204471A/en not_active Expired
- 1982-11-02 JP JP19327482A patent/JPS58105178A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| AU9005582A (en) | 1983-05-12 |
| JPH0365556B2 (en) | 1991-10-14 |
| JPS58105178A (en) | 1983-06-22 |
| EP0078476A2 (en) | 1983-05-11 |
| AU554814B2 (en) | 1986-09-04 |
| EP0078476A3 (en) | 1983-09-21 |
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