US3899327A - Charge carrier foil - Google Patents
Charge carrier foil Download PDFInfo
- Publication number
- US3899327A US3899327A US438832A US43883274A US3899327A US 3899327 A US3899327 A US 3899327A US 438832 A US438832 A US 438832A US 43883274 A US43883274 A US 43883274A US 3899327 A US3899327 A US 3899327A
- Authority
- US
- United States
- Prior art keywords
- layer
- intermediate layer
- charge carrier
- selenium
- carrier foil
- 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 - Lifetime
Links
- 239000011888 foil Substances 0.000 title claims abstract description 42
- 239000002800 charge carrier Substances 0.000 title claims description 28
- 229910052711 selenium Inorganic materials 0.000 claims abstract description 44
- 239000011669 selenium Substances 0.000 claims abstract description 44
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 claims abstract description 42
- DHKHKXVYLBGOIT-UHFFFAOYSA-N acetaldehyde Diethyl Acetal Natural products CCOC(C)OCC DHKHKXVYLBGOIT-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229920002554 vinyl polymer Polymers 0.000 claims abstract description 8
- 239000006233 lamp black Substances 0.000 claims description 12
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 5
- 230000000996 additive effect Effects 0.000 claims description 5
- 229910052785 arsenic Inorganic materials 0.000 claims description 4
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 claims description 4
- 150000001241 acetals Chemical class 0.000 claims 1
- 125000002777 acetyl group Chemical class [H]C([H])([H])C(*)=O 0.000 abstract description 7
- 238000000151 deposition Methods 0.000 abstract description 3
- 239000006229 carbon black Substances 0.000 abstract 1
- 238000007792 addition Methods 0.000 description 11
- 239000004922 lacquer Substances 0.000 description 10
- 239000000758 substrate Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 7
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 229910002804 graphite Inorganic materials 0.000 description 5
- 239000010439 graphite Substances 0.000 description 5
- XEKOWRVHYACXOJ-UHFFFAOYSA-N Ethyl acetate Chemical compound CCOC(C)=O XEKOWRVHYACXOJ-UHFFFAOYSA-N 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000004901 spalling Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 2
- 150000002611 lead compounds Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229920001568 phenolic resin Polymers 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229920003180 amino resin Polymers 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 229910052729 chemical element Inorganic materials 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000007822 coupling agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 229920003227 poly(N-vinyl carbazole) Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 150000003342 selenium Chemical class 0.000 description 1
- 125000003748 selenium group Chemical group *[Se]* 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- 239000002966 varnish Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G5/00—Recording members for original recording by exposure, e.g. to light, to heat, to electrons; Manufacture thereof; Selection of materials therefor
- G03G5/10—Bases for charge-receiving or other layers
Definitions
- the present invention relates to' a charge carrier foil consisting of a flexible conducting substrate with a nonconducting selenium layer and a conducting intermediate layer between the substrate and the selenium layer, and a process for preparing said foil.
- charge carrier plates in which a non-conducting selenium layer is arranged on a conducting substrate are used for forming the images.
- This selenium layer is charged electrostatically, and partly discharged by exposure with the desired image pattern, so that the image pattern will exist on the selenium layer in the form of a corresponding charge distribution.
- an image powder also known as toner, is applied to the selenium layer provided with the charge pattern, and is transferred from the selenium layer to a sheet of paper, where it is fixed.
- charge carrier plates in the form of rigid metal plates or of cylindrical metal drums have been used in electrophotographic devices. Since the surface of these plates and drums must correspond to the image to be reproduced, the size of the plates and drums is predetermined with respect to a certain size of image. The size of the plates or drums is thus determinative of the size of the electrophotographic apparatus, for example, the copying machine.
- One such known step resides in arranging between the flexible conducting substrate and the selenium layer an intermediate layer of a conductive material adhering well not only to the flexible substrate, but also to the non-conducting selenium layer.
- a conducting intermediate layer a variety of substances have been used up to now; for example, phenoplasts, cellulose lacquers, alkydes, phenol-formaldehyde resins, polyvinylcarbazole, urea melamine-aldehyde resins, polyester, polysulfides, polyurethanes, aminoplasts, polyvinyl alcohol, silicones, polystyrene, chlorinated rubber and other substances. All of these substances are rendered conductive, for example, by adding lampblack or graphite thereto.
- a charge carrier foil comprising a flexible conducting substrate, a conducting intermediate layer on said substrate (said intermediate layer comprising polyvinyl acetal containing lampblack as an additive), and a non-conducting selenium layer arranged on said intermediate layer. It has proved that just this kind of intermediate layer substance is particularly suitable for improving the adhesion of the non-conducting selenium layer to the flexible substrate.
- a clean, stainless and tape-shaped metal foil having a thickness of about 0.1 microns, for example, a steel tape there is sprayed in a dust-free room and by using a blow gun, a conductive layer of lacquer for serving as the intermediate layer.
- This layer of lacquer consists of polyvinyl acetal as the basic substance to which there is admixed a share of lampblack and graphite for increasing the conductivity, and which contains ethyl acetate and methanol as the non-conducting solvent.
- the use of a non-conducting solvent offers the advantage that the lacquer conductance can be reduced to such an extent during the spraying process, that the lacquer may also be deposited in accordance with an electrostatic varnish coating method which is particularly suitable for largescale production. Owing to the dust-free surroundings, the surface of the layer of lacquer will be very even, thus guaranteeing an excellent coupling agent base for the photoconducting selenium layer to be deposited.
- the lacquer is preferably deposited onto the metal foil as a layer in the order of 1 to 2 microns thick and, by containing an approximately 10 per cent share of lampblack and graphite, has a conductance of 1.5 siemens.
- the intermediate layer substance is provided with an addition of organic solvents, e.g. with a mixture of ethyl acetat and methanol. These solvents completely evaporate upon application of the intermediate layer, so as to secure the desired composition,
- the thus coated foil is subsequently subjected to a heat treatment in a heating furnace at a temperature of C for a period of about 8 hours.
- the layer of lacquer is polished by the application of pressure and a flexible superfine grinding machine. This further increases the surface smoothness of the layer of lacquer. Due to the polishing, the selenium layer can be charged to a higher voltage value. Compared with a nonpolished surface, the increase amounts to. as much as 250 volts.
- the photoconducting selenium layer which contains various additions, admixtures or dopings, but is preferably, however, provided with an addition of 0.5 per cent arsenic, may be deposited in the known manner in the form of a layer in the order of preferably 60 microns thick.
- a selenium layer containing an addition of up to percent by weight of a chemical element with a high atomic weight or of a chemical compound of such an element Preferably, in this case, there is used a selenium layer containing an addition of lead or a lead compound.
- the selenium layer may preferably be built up of partial layers; i.e., following the intermediate layer, there may be arranged a selenium layer of pure selenium on which there is deposited a selenium layer containing an addition of lead or a lead compound, and comprising as the top layer a selenium layer with an addition of arsenic amounting to 0.5 per cent.
- Adhesive strength of the selenium layer when using the intermediate layer of polyvinyl acetal with an addition of lampblack and/or graphite has once been examined by pressing on and pulling off an adhesive foil and, secondly, by being subjected to a special bending test.
- the bending test was carried out in such a way that the charge carrier foil was welded to form an endless tape and placed over two rollers each having a diameter of 10 cm. Between the two rollers a tensile force amounting to about 10 kg was exerted upon the charge carrier foil. By driving the rollers at a speed of about 60 cm/sec., the foil was subjected to a permanent bending over the rollers.
- surface polishing or grinding following heat treatment is preferably carried out with the aid of a flexible superfine grinding machine, but the use of additional polishing agents should be avoided.
- contamination of the intermediate layer surface must be carefully avoided. Further, any touching of the surface of the intermediate layer prior to the deposition of the selenium layer should be avoided.
- the selenium layer itself is deposited in the manner known per se by being evaporated under vacuum. As already outlined hereinbefore, it is of advantage for the selenium layer to contain certain additions, and the selenium layer may also be produced in the form of partial layers each having a different content of additions.
- a charge carrier foil comprising:
- said intermediate layer comprising polyvinyl acetal containing lampblack as an additive
- a charge carrier foil according to claim 5 wherein the conductance of said intermediate layer is 1.5 siemens.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Laminated Bodies (AREA)
- Photoreceptors In Electrophotography (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19732306159 DE2306159C3 (de) | 1973-02-08 | 1973-02-08 | Elektrophotographisches Aufzeichnungsmaterial |
DE19732306158 DE2306158C3 (de) | 1973-02-08 | Elektrofotografisches Aufzeichnungsmaterial |
Publications (1)
Publication Number | Publication Date |
---|---|
US3899327A true US3899327A (en) | 1975-08-12 |
Family
ID=25764661
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US438832A Expired - Lifetime US3899327A (en) | 1973-02-08 | 1974-02-01 | Charge carrier foil |
Country Status (6)
Country | Link |
---|---|
US (1) | US3899327A (es) |
JP (1) | JPS5047631A (es) |
BR (1) | BR7400883D0 (es) |
CH (1) | CH567743A5 (es) |
ES (1) | ES423025A1 (es) |
IT (1) | IT1007274B (es) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4015985A (en) * | 1975-04-09 | 1977-04-05 | Xerox Corporation | Composite xerographic photoreceptor with injecting contact layer |
US4251612A (en) * | 1978-05-12 | 1981-02-17 | Xerox Corporation | Dielectric overcoated photoresponsive imaging member |
US4275132A (en) * | 1978-05-12 | 1981-06-23 | Xerox Corporation | Dielectric overcoated photoresponsive imaging member and imaging method |
US6136485A (en) * | 1997-12-26 | 2000-10-24 | Sharp Kabushiki Kaisha | Electrophotographic photoreceptor, process for production thereof, and image-forming apparatus using same |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5525030A (en) * | 1978-08-09 | 1980-02-22 | Canon Inc | Electrophotographic photoreceptor |
JPS56107247A (en) * | 1980-01-31 | 1981-08-26 | Ricoh Co Ltd | Image recording method |
JPH01118149A (ja) * | 1988-09-30 | 1989-05-10 | Ricoh Co Ltd | 画像記録方法 |
JPH01158456A (ja) * | 1988-09-30 | 1989-06-21 | Ricoh Co Ltd | 画像記録方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2962376A (en) * | 1958-05-14 | 1960-11-29 | Haloid Xerox Inc | Xerographic member |
US3226253A (en) * | 1960-08-23 | 1965-12-28 | Int Standard Electric Corp | Method of producing photosensitive layers of lead selenide |
US3467548A (en) * | 1963-07-08 | 1969-09-16 | Xerox Corp | Method of making xerographic plate by vacuum evaporation of selenium alloy |
US3615413A (en) * | 1969-06-23 | 1971-10-26 | Xerox Corp | Indium doping of selenium-arsenic photoconductive alloys |
US3639121A (en) * | 1969-03-03 | 1972-02-01 | Eastman Kodak Co | Novel conducting lacquers for electrophotographic elements |
US3775109A (en) * | 1969-05-22 | 1973-11-27 | Ricoh Kk | Electrophotographic photosensitive plate |
-
1974
- 1974-02-01 US US438832A patent/US3899327A/en not_active Expired - Lifetime
- 1974-02-07 BR BR883/74A patent/BR7400883D0/pt unknown
- 1974-02-07 CH CH167974A patent/CH567743A5/xx not_active IP Right Cessation
- 1974-02-07 JP JP49014979A patent/JPS5047631A/ja active Pending
- 1974-02-08 ES ES423025A patent/ES423025A1/es not_active Expired
- 1974-02-08 IT IT20272/74A patent/IT1007274B/it active
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2962376A (en) * | 1958-05-14 | 1960-11-29 | Haloid Xerox Inc | Xerographic member |
US3226253A (en) * | 1960-08-23 | 1965-12-28 | Int Standard Electric Corp | Method of producing photosensitive layers of lead selenide |
US3467548A (en) * | 1963-07-08 | 1969-09-16 | Xerox Corp | Method of making xerographic plate by vacuum evaporation of selenium alloy |
US3639121A (en) * | 1969-03-03 | 1972-02-01 | Eastman Kodak Co | Novel conducting lacquers for electrophotographic elements |
US3775109A (en) * | 1969-05-22 | 1973-11-27 | Ricoh Kk | Electrophotographic photosensitive plate |
US3615413A (en) * | 1969-06-23 | 1971-10-26 | Xerox Corp | Indium doping of selenium-arsenic photoconductive alloys |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4015985A (en) * | 1975-04-09 | 1977-04-05 | Xerox Corporation | Composite xerographic photoreceptor with injecting contact layer |
US4251612A (en) * | 1978-05-12 | 1981-02-17 | Xerox Corporation | Dielectric overcoated photoresponsive imaging member |
US4275132A (en) * | 1978-05-12 | 1981-06-23 | Xerox Corporation | Dielectric overcoated photoresponsive imaging member and imaging method |
US6136485A (en) * | 1997-12-26 | 2000-10-24 | Sharp Kabushiki Kaisha | Electrophotographic photoreceptor, process for production thereof, and image-forming apparatus using same |
Also Published As
Publication number | Publication date |
---|---|
BR7400883D0 (pt) | 1974-11-05 |
JPS5047631A (es) | 1975-04-28 |
CH567743A5 (es) | 1975-10-15 |
ES423025A1 (es) | 1976-10-16 |
IT1007274B (it) | 1976-10-30 |
AU6540474A (en) | 1975-08-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: ALCATEL N.V., DE LAIRESSESTRAAT 153, 1075 HK AMSTE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:INTERNATIONAL STANDARD ELECTRIC CORPORATION, A CORP OF DE;REEL/FRAME:004718/0023 Effective date: 19870311 |