Including Conductive Base Or Support Patents (Class 430/69)
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Patent number: 4680244Abstract: The disclosed light-sensitive recording material is composed of an electrically conductive support, suitable for the production of printing forms or printed circuits, and a photoconductive layer system containing a photoconductor, a binder, a sensitizing dye and conventional additives. The photoconductive system comprises (A) a single photoconductive layer, or multiple layers, applied to the support and (B) a light-sensitive covering layer which contains at least one photochemically reactive compound. The use of the recording material in a process for the production of printing forms and printed circuits is also disclosed.Type: GrantFiled: March 18, 1985Date of Patent: July 14, 1987Assignee: Hoechst AktiengesellschaftInventors: Peter Lehmann, Manfred Michel
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Patent number: 4664995Abstract: An electrostatographic imaging member comprising at least one imaging layer capable of retaining an electrostatic latent image, a supporting substrate layer having an electrically conductive surface, and an electrically conductive ground strip layer adjacent the electrostatographic imaging layer and in electrical contact with the electrically conductive layer, the electrically conductive ground strip layer comprising a film forming binder, conductive particles and crystalline particles dispersed in the film forming binder and a reaction product of a bi-functional chemical coupling agent with both the film forming binder and the crystalline particles. This imaging member may be employed in an electrostatographic imaging process.Type: GrantFiled: October 24, 1985Date of Patent: May 12, 1987Assignee: Xerox CorporationInventors: Anthony M. Horgan, Alfred T. LaFrance, Francis J. Wieloch, Robert C. U. Yu
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Patent number: 4654285Abstract: The present invention relates to an electrophotographic sensitive member for use in a laser line printer and a method of producing same.Type: GrantFiled: September 28, 1984Date of Patent: March 31, 1987Assignees: Kyocera Corporation, Takao KawamuraInventor: Yasuo Nishiguchi
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Patent number: 4650736Abstract: A light receiving member comprises a light receiving layer of a multi-layer structure having at least one photosensitive layer comprising an amorphous material containing silicon atoms on a substrate, said photosensitive layer having at least one pair of non-parallel interfaces within a short range and said non-parallel interfaces being arranged in a large number in at least one direction within a plane perpendicular to the layer thickness direction.Type: GrantFiled: February 8, 1985Date of Patent: March 17, 1987Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Masahiro Kanai, Tetsuo Sueda, Teruo Misumi, Yoshio Tsuezuki, Kyosuke Ogawa
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Patent number: 4623601Abstract: A photoconductive device of decreased resistivity is provided by using at least one zinc oxide transparent conductive layer in conjunction with a thin film amorphous silicon photoconductor. The zinc oxide layer can be used as the front contact, the back contact or both the front and back contacts of the photoconductive device.Type: GrantFiled: June 4, 1985Date of Patent: November 18, 1986Assignee: Atlantic Richfield CompanyInventors: Steven C. Lewis, Robert B. Love, Stephen C. Miller, Yuh-han Shing, John W. Sibert, David P. Tanner, Nang T. Tran
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Patent number: 4619990Abstract: Polymeric dyes having pendent chromophore groups which are selected from azo, tricyanovinyl, anthraquinone, methine, and indoaniline groups fall into two classes, [A] condensation polymers, and [B] polymers derived from copolymerized ethylenically-unsaturated monomers, the dyes being capable of undergoing thermoplastic deformation by a focused laser beam when in a layer of thickness in the range of 0.1 to 100 micrometers and having an absorptivity in the range of 10 to 250 Lg.sup.-1 cm.sup.-1. They are film-forming, thermally- and light-stable, and solvent-coatable. These compounds are useful as coloring and light-absorbing agents, particularly as the light-absorbing agents in thin optical recording layers.Type: GrantFiled: March 11, 1985Date of Patent: October 28, 1986Assignee: Minnesota Mining and Manufacturing CompanyInventor: Mohamed A. Elmasry
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Patent number: 4618561Abstract: A record memory medium comprises a recording layer comprising a monomolecular film or monomolecular layer built-up film of a photosensitive organic compound having a hydrophilic moiety and a hydrophobic moiety. The medium can be used for recording/reading-out of information and light recording.Type: GrantFiled: November 29, 1984Date of Patent: October 21, 1986Assignee: Canon Kabushiki KaishaInventors: Hirohide Munakata, Yoshinori Tomida, Masahiro Haruta, Yutaka Hirai, Yukuo Nishimura, Takashi Hamamoto
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Patent number: 4618553Abstract: An electrophotographic recording material is disclosed. The material comprises a support having provided thereon a photoconductive layer, in which a backing layer containing a long-chain alkanoic acid metal salt is provided on the reverse side of the support. The material has improved slipping property and excellent running durability.Type: GrantFiled: May 28, 1985Date of Patent: October 21, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasuaki Yuyama, Junji Nakano, Shyunichi Kondo, Hideo Sato, Kenichi Sawada
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Patent number: 4617245Abstract: A light receiving member provided with a coating layer having a light receiving layer on a substrate, where the thickness of the coating layer is regularly changed within the minute width of the coating layer.Type: GrantFiled: February 1, 1985Date of Patent: October 14, 1986Assignee: Canon Kabushiki KaishaInventors: Shigemori Tanaka, Fumio Sumino, Keiji Kubo, Masafumi Hisamura, Hitoshi Toma, Naoto Fujimura
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Patent number: 4609606Abstract: A polyester comprising at least 12 mole percent polymerized recurring units containing an arylamine photoconductive component and at least 15 mole percent polymerized recurring units containing a photopolymerizable component and wherein each of said components is responsive to a different wavelength of light. The polyesters are useful in radiation-sensitive elements, particularly lithographic elements.Type: GrantFiled: April 1, 1985Date of Patent: September 2, 1986Assignee: Eastman Kodak CompanyInventors: John M. Noonan, Jerome H. Perlstein, Michael Scozzafava
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Patent number: 4601963Abstract: A photosensitive drum includes a cylindrical core which may be fixedly mounted on a rotating shaft and which is comprised of an elastic material and an outer sleeve which is provided on the outer peripheral surface of the core and which includes a supporting layer and a photosensitive layer formed on the supporting layer. A combination of the elastic core and the outer sleeve is constructed such that the drum only deforms locally at a point where an external force is applied and its immediate vicinity while maintaining the other portion virtually unchanged. In one form, the outer sleeve is fixedly mounted on the core, and, in another form, the outer sleeve is detachably mounted on the core. In the latter case, it is so structured that no relative movement takes place between the core and the outer sleeve even if external forces are applied to the drum.Type: GrantFiled: April 16, 1984Date of Patent: July 22, 1986Assignee: Ricoh Company, Ltd.Inventors: Michio Takahashi, Mitsuo Tanaka, Fuchio Kanno, Kazuo Kobayashi
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Patent number: 4600671Abstract: A photoconductive member comprises a substrate for the photoconductive member and a light receiving layer exhibiting photoconductivity provided on said substrate comprising an amorphous material containing silicon atoms and germanium atoms, the light receiving lager having a layer region (N) containing nitrogen atoms, and the layer region (N) having a region (X) in which the content C (N) of nitrogen atoms in the layer thickness direction smoothly and continuously increases toward the upper surface of the light receiving layer.Type: GrantFiled: September 7, 1984Date of Patent: July 15, 1986Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Yukihiko Ohnuki, Shigeru Ohno
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Patent number: 4595644Abstract: A photoconductive member comprises a substrate and a layer constituted of an amorphous material containing Si and Ge and exhibiting photoconductivity, said layer having a layer region containing nitrogen ununiformly in the direction of layer thickness, the distribution concentration curve of nitrogen in the direction of layer thickness being smooth and the maximum distribution concentration being present in said layer.An amorphous layer of Si containing at least one of oxygen and carbon may overlie the above mentioned layer.Type: GrantFiled: September 7, 1984Date of Patent: June 17, 1986Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Yukihiko Ohnuki, Shigeru Ohno
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Patent number: 4592983Abstract: A photoconductive member comprises a substrate for photoconductive member and a light receiving layer having a layer constitution in which a first layer region (G) comprising an amorphous material containing germanium atoms and a second layer region (S) exhibiting photoconductivity comprising an amorphous material containing silicon atoms are successively provided from the substrate side, said light receiving layer containing carbon atoms.Type: GrantFiled: September 6, 1984Date of Patent: June 3, 1986Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Yukihiko Ohnuki, Shigeru Ohno
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Patent number: 4592981Abstract: A photoconductive member comprises a substrate for photoconductive member and a light receiving layer having photoconductivity comprising an amorphous material containing silicon atoms and germanium atoms, said light receiving layer containing carbon atoms and having a first layer region, a third layer region and a second layer region with the carbon atom content in the layer thickness direction of C(1), C(3) and C(2), respectively, in the order from the substrate side [with the proviso that when C(3) cannot solely be the maximum and either one of C(1) and C(2) is zero, the other two are not zero and not equal to each other, or when C(3) is zero, the other two are not zero, or when none of C(1), C(2) and C(3) is zero, the three of C(1), C(2) and C(3) cannot be equal at the same time and C(3) cannot solely be the maximum].Type: GrantFiled: September 12, 1984Date of Patent: June 3, 1986Assignee: Canon Kabushiki KaishaInventors: Keishi Saitoh, Yukihiko Ohnuki, Shigeru Ohno
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Patent number: 4582772Abstract: This invention is directed to an improved photoresponsive device comprised in the order stated of (1) a substrate, (2) a transmissive semi-conductive layer selected from the group consisting of indium-tin oxide, cadmium tin oxide, tin oxide, titanium oxides, titanium nitrides, titanium silicides, and mixtures thereof (3) a photogenerating layer comprised of an inorganic photoconductive composition or an organic photoconductive composition, dispersed in a resinous binder and (4) a charge carrier transport layer comprised of a combination of a resinous binder having dispersed therein small molecules of an electrically active material, the combination of which is substantially non-absorbing to visible light and allows the injection of photogenerating holes from the charge photogenerating layer in contact therewith, the electrically active material being of the following formula: ##STR1## wherein X is selected from the group consisting of ortho CH.sub.3, meta CH.sub.3, para CH.sub.Type: GrantFiled: February 15, 1983Date of Patent: April 15, 1986Assignee: Xerox CorporationInventors: Leon A. Teuscher, Ian D. Morrison
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Patent number: 4537845Abstract: In an electrophotographic photosensitive device including a conductive layer, a selenium based photoconductive layer and a transparent insulating layer which are sequentially laminated, the conductive layer is formed by an aluminum substrate conductive layer, a zinc conductive layer (or a zinc conductive layer and a copper conductive layer), and a nickel conductive layer which are sequentially laminated to each other. As a result of this structure, the charge injection characteristic during the primary charging step is improved, and the charge injection preventing characteristic during the simultaneous secondary charging and image exposure steps is sufficiently maintained. The conductive layers contact each other intimately. The electrophotographic photosensitive device exhibits a high humidity durability and a long life and can obtain high electrostatic contrast.Type: GrantFiled: October 19, 1983Date of Patent: August 27, 1985Assignee: Olympus Optical Company Ltd.Inventors: Yoshiyuki Mimura, Takao Okada, Akitoshi Toda
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Patent number: 4537846Abstract: In an electrophotographic photosensitive device including a conductive layer, a selenium based photoconductive layer and a transparent insulating layer which are sequentially laminated, the conductive layer is formed of an aluminum substrate conductive layer, a zinc conductive layer a copper conductive layer, and silver conductive layer which are sequentially laminated to each other. As a result of this structure, the charge injection characteristic of the photosensitive device during primary charging is improved, and the charge injection preventing characteristic during the simultaneous secondary charging and image exposure steps is sufficiently maintained. The conductive layers contact each other intimately. The electrophotographic photosensitive device is highly humidity durable and exhibits a long life and can obtain high electrostatic contrast.Type: GrantFiled: October 19, 1983Date of Patent: August 27, 1985Assignee: Olympus Optical Company, Ltd.Inventors: Yoshiyuki Mimura, Takao Okada, Akitoshi Toda
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Patent number: 4514483Abstract: The present invention provides a method for preparing a selenium type electrophotographic element comprising the steps of processing the surface of an electrically conductive substrate which has a metal surface by vibrating and sliding a grindstone until a predetermined surface-roughness is obtained and thereafter vapordepositing thereon selenium, selenium alloy or selenium compound in a usual manner.Type: GrantFiled: March 30, 1983Date of Patent: April 30, 1985Assignee: Ricoh Co., Ltd.Inventors: Tadashi Matsuura, Yasuo Kadomatsu
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Patent number: 4492745Abstract: A photosensitive member for electrophotography basically comprises a conductive support, on the surface of which a photoconductive layer and a transparent insulating layer are sequentially laminated. The photosensitive member is adapted to be used in a process for forming an electrostatic latent image including sequential steps of a primary corona charging concurrent with imagewise exposure, a secondary corona charging and a flush irradiation. The surface of the conductive support is treated to a mirror finish, based on experimental finding that the contrast voltage of the latent image depends on the degree of surface roughness of the support.Type: GrantFiled: October 31, 1983Date of Patent: January 8, 1985Assignee: Olympus Optical Co., Ltd.Inventors: Yoshiyuki Mimura, Takao Okada, Akitoshi Toda
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Patent number: 4491626Abstract: The invention disclosed relates to a photosensitive member having excellent photosensitivity characteristics in the visible light region as well as in the near infrared region. According to first embodiment of the invention, the photosensitive member comprises an electrically conductive substrate, an amorphous silicon-germanium photoconductive layer having a thickness of about 0.1 to 3 microns, and an amorphous silicon photoconductive layer of 5 to 30 micron thick formed on the amorphous silicon-germanium photoconductive layer. Second embodiment of the photosensitive member comprises a substrate, an amorphous silicon semiconductor layer of 5 to 100 micron thick and an amorphous silicon-germanium photoconductive layer formed on the amorphous silicon semiconductor layer.Type: GrantFiled: March 7, 1983Date of Patent: January 1, 1985Assignees: Minolta Camera Kabushiki Kaisha, Takao Kawamura, Kyocera Corp.Inventors: Takao Kawamura, Masazumi Yoshida
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Patent number: 4481273Abstract: An electrophotographic photosensitive member comprising a photosensitive layer formed by coating of a coating solution containing a photoconductive compound on a electroconductive substrate followed by drying, said electroconductive substrate having a C/.rho. value of 0.250 or less when the heat capacity per unit surface area of said electroconductive substrate is made C cal/cm.sup.2..degree.C. and the thermal conductivity of the material for said electroconductive substrate is made .rho. cal/cm.sec..degree.C.Type: GrantFiled: May 20, 1983Date of Patent: November 6, 1984Assignee: Canon Kabushiki KaishaInventors: Kazuharu Katagiri, Yoshihiro Oguchi, Yoshio Takasu
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Patent number: 4464451Abstract: An electrophotographic image-forming member comprises a substrate for electrophotography and an amorphous layer which is laid on said substrate and constituted of silicon atoms as matrix containing at least one of hydrogen atom and halogen atom and exhibits photoconductivity, said substrate being constituted of aluminum oxide containing chemi-structurally water at least on the surface thereof, and said amorphous layer having a layer region containing at least one member selected from the group consisting of oxygen atom, nitrogen atom and carbon atom in at least a part thereof, the content of said member in said layer region being distributed unevenly in the direction of the thickness of said layer.Type: GrantFiled: January 29, 1982Date of Patent: August 7, 1984Assignee: Canon Kabushiki KaishaInventors: Shigeru Shirai, Junichiro Kanbe, Tadaji Fukuda
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Patent number: 4462862Abstract: Disclosed is a method for removing an amorphous silicon photosensitive layer from the metallic surface (e.g., aluminum or stainless steel) of a substrate used in electrophotography. The amorphous silicon layer is removed by exposing such layer to a plasma generated in a fluorine containing atmosphere. Such a plasma provides a high etch rate for the amorphous silicon layer and an extremely high silicon-to-metal etch selectivity. Therefore, the amorphous silicon layer may be rapidly removed by etching at a high power density without risk of damaging the polished metallic surface of the electrophotographic substrate. Moreover, since the etching automatically stops when the metallic surface is reached, no end-point detection is necessary.Type: GrantFiled: June 10, 1982Date of Patent: July 31, 1984Assignee: Fuji Electric Company, Ltd.Inventors: Toyoki Kazama, Michiro Shimatani
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Patent number: 4451546Abstract: The invention disclosed relates to a photosensitive member having excellent photosensitivity characteristics in the visible light region as well as in the near infrared region. The photosensitive member according to the invention comprises an electrically-conductive substrate, an amorphous silicon semiconductor layer, an amorphous silicon-germanium photoconductive layer formed on the semiconductor layer, and an amorphous silicon photoconductive layer formed the amorphous silicon-germanium photoconductive layer.Type: GrantFiled: March 7, 1983Date of Patent: May 29, 1984Assignees: Minolta Camera Kabushiki Kaisha, Takao Kawamura, Kyocera CorporationInventors: Takao Kawamura, Masazumi Yoshida
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Patent number: 4442160Abstract: An electrostatic recording medium is disclosed comprising a recording layer, a conductive layer, and a support, the conductive layer being a dried coating film of a mixture composed of (A) a polyurethane binder resin prepared by reaction of a polyester and a polyisocyanate, and (B) a predispersion of carbon black.Type: GrantFiled: July 13, 1982Date of Patent: April 10, 1984Assignees: Daicel Chemical Industries, Ltd., Fuji Xerox Co., Ltd.Inventors: Hirotaka Toba, Masanori Itoh, Keita Nakano, Shoji Wakoh, Toshihiko Toyoshima, Hidemasa Todo
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Patent number: 4426435Abstract: An electrophotographic light-sensitive member comprising a conductive support, a photoconductive layer and a protective outer layer, the protective outer layer comprising at least one particulate metal oxide having a mean particle size below about 0.3 .mu.m dispersed in an organic resin binder material. The electrophotographic light-sensitive member may be prepared by initially forming the protective outer layer and thereafter applying the photoconductive layer and conductive support thereto.Type: GrantFiled: November 19, 1981Date of Patent: January 17, 1984Assignee: Rank Xerox LimitedInventor: Kozo Oka
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Patent number: 4416963Abstract: An electrically-conductive support for an electrophotographic medium, comprising a support and an electrically-conductive layer provided on the support is disclosed. The electrically-conductive layer comprises a binder and electrically-conductive metal oxide fine particles having an average grain size of 0.5.mu. or less, dispersed in the binder.Type: GrantFiled: April 13, 1981Date of Patent: November 22, 1983Assignee: Fuji Photo Film Co., Ltd.Inventors: Masaaki Takimoto, Takashi Saida, Masataka Murata
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Patent number: 4405703Abstract: In an electrophotographic plate comprising a substrate and a photoconductive layer formed on said substrate, when said substrate is made of an age-hardening type aluminum alloy and has a Vickers hardness of 60 Hv or higher, there can be produced electrophotographic plates high in dimensional accuracy, good in resistance to mechanical damages and impact, and very small in eccentricity when molded in the form of a drum. When the surface hardness of the selenium photoconductive layer is made 5 H or harder in pencil hardness, the resulting electrophotographic plate is excellent in printing performance and has a long life.Type: GrantFiled: September 30, 1981Date of Patent: September 20, 1983Assignees: Hitachi, Ltd., Hitachi Koki Co., Ltd.Inventors: Shigeharu Onuma, Kunihiro Tamahashi, Akira Hosoya, Atsushi Kakuta, Yasuki Mori, Hirosada Morishita
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Patent number: 4400440Abstract: There is provided a method of coating a paper substrate in either sheet or web form to form a base useful in forming electrostatic masters. A thin coating of a reactive film forming resin is applied to the paper and the resin reacted with an ammonium zirconyl complex and dried. This treatment avoids blocking or sticking together of successive layers of paper coated with relatively low glass transition temperature film forming resins.Type: GrantFiled: January 2, 1981Date of Patent: August 23, 1983Assignee: Allied Paper IncorporatedInventor: Michael J. Shaw
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Patent number: 4395475Abstract: Polymeric photoconductors are disclosed comprising a condensation polymer backbone containing, as repeating units, the condensation residues of (1) a diacid, and (2) an organic difunctional compound capable of undergoing condensation polymerization with said diacid, and an arylamine photoconductor group appended to at least one of said diacid or said organic difunctional compound residues.A preferred polymeric photoconductor is ionic and comprises a condensation copolymer containing, in addition to the above described repeating units, the condensation residue of a second diacid containing an anionic iminodisulfonyl or sulfo group. In certain embodiments, the ionic arylamine-containing polymers are water-dispersible copolyesters.The polymeric photoconductors described are useful in photoconductive compositions and elements. Electrophotographic processes employing such elements are also disclosed.Type: GrantFiled: July 20, 1981Date of Patent: July 26, 1983Assignee: Eastman Kodak CompanyInventors: John M. Noonan, Jerome H. Perlstein
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Patent number: 4388394Abstract: A photoreceptor device comprises a conductive substrate and an electrophotographic layer thereon. The electrophotographic layer comprises copper-chlorine activated cadmium sulfide blended with a light-absorbing material.Type: GrantFiled: July 13, 1981Date of Patent: June 14, 1983Assignee: Gte Products CorporationInventors: Sixdeniel Faria, Ronald E. Karam
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Patent number: 4385105Abstract: An electrophotographic image carrier structure comprises an electrically conductive substrate, a selenium-containing photoconductive layer including more than 35% by weight arsenic, a polyvinyl carbazole covering layer and an intermediate amorphous selenium layer which is situated between the covering layer and the photoconductive layer and which has an arsenic content of zero to less than 0.5% by weight.Type: GrantFiled: November 3, 1980Date of Patent: May 24, 1983Assignee: Licentia Patent-Verwaltungs-G.m.b.H.Inventors: Manfred Lutz, Bernd Reimer
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Patent number: 4365015Abstract: An electrophotographic photosensitive member for forming a potential image utilizing the difference in voltage distribution resulting from the change in resistance of a photoconductive layer. The photosensitive member is featured in forming a high-contrast potential image by the use of amorphous silicon for the photoconductive layer.Type: GrantFiled: August 11, 1980Date of Patent: December 21, 1982Assignee: Canon Kabushiki KaishaInventors: Nobuo Kitajima, Shunichi Ishihara, Yuji Nishigaki, Nobuko Kitahara
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Patent number: 4350748Abstract: This invention relates to an improvement in the process for the manufacture of printing forms and printed circuits by coating an electrically conductive support with an organic photoconductor layer and by charging, exposing, and developing the electrostatic image by means of a finely particulate toner, fixing and dissolving the layer away from the non-image areas by means of a decoating medium and, if appropriate, etching of the bared support surface, the improvement which comprises, for the purpose of coating, transferring the organic photoconductor layer on a temporary support to the electrically conductive support with the aid of heat and pressure.Type: GrantFiled: June 29, 1981Date of Patent: September 21, 1982Assignee: Hoechst AktiengesellschaftInventor: Erwin Lind
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Patent number: 4332851Abstract: A coated paper suitable for use in an electrophotographic process for receiving an image formed by a magnetic brush device with a single component developer is disclosed. The paper is coated with a composition made of a styrene/butadiene latex and a crosslinking agent for the latex, together with any desired pigment and nonionic emulsifier. The composition may be economically coated onto paper at an amount about 1 to 5 grams per square meter.Type: GrantFiled: March 11, 1980Date of Patent: June 1, 1982Assignee: Rank Xerox LimitedInventors: Hiroyoshi Hosomura, Koichi Aota, Eiji Yoshimura
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Patent number: 4315981Abstract: This invention relates to an electrophotographic recording material consisting of an electroconductive support material and a photoconductive double layer of organic materials which consists of a homogeneous, opaque, charge carrier producing dyestuff layer from a more annealed quinone or the substitution product thereof, selected from the group consisting of dibenzopyrene quinone, anthanthrone, pyranthrone, dibenzanthrone, and flavanthrone, possible substituents being halogen, nitro, amino, hydroxy, alkoxy, mercapto or alkyl mercapto groups, and of a transparent top layer of insulating materials with at least one charge transporting compound.Type: GrantFiled: March 2, 1978Date of Patent: February 16, 1982Assignee: Hoechst AktiengesellschaftInventor: Wolfgang Wiedemann
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Patent number: 4306996Abstract: An electroconductive polymer composition containing an electroconductive polymer and an agent that imparts improved tack properties to paper coated with the composition.Type: GrantFiled: May 5, 1980Date of Patent: December 22, 1981Assignee: Calgon CorporationInventor: Robert H. Windhager
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Patent number: 4293595Abstract: An improved aqueous process for making a conductive medium for electrostatic printing and the conductive medium therefrom, the process comprising applying to one side of a high density basestock a partially insolubilizable aqueous conductive latex precoat, preferably ranging in coat weight from 0.5 to 1.0 pounds per 3000 ft.sup.2, the insolubiliztion of the conductive latex resulting from a partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance conductive precoat preferably having a coat weight of about 2 pounds per 3000 ft.sup.2 ; partially insolubilizing the conductive latex precoat; applying to the partially insolubilized latex precoat an aqueous dielectric coating preferably ranging in coat weight from 4.5 to 6.5 pounds per 3000 ft.sup.2 ; and applying to the first low-resistance precoat a second aqueous low-resistance conductive coating preferably ranging in coat weight from 0.5 to 1.5 pounds per 3000 ft.sup.2.Type: GrantFiled: March 28, 1979Date of Patent: October 6, 1981Assignee: International Paper CompanyInventors: William H. Kreiling, Edward S. Jones
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Patent number: 4293610Abstract: An improved aqueous process for making a conductive medium for electrostatic printing and the conductive medium therefrom, the process comprising applying to one side of a high density basestock a partially insolubilizable aqueous conductive latex precoat, preferably ranging in coat weight from 0.5 to 1.0 pounds per 3000 ft.sup.2, the insolubilization of the conductive latex resulting from a partial insolubilization of the major conductive component of the latex; applying to the other side of the basestock a first aqueous low-resistance conductive precoat preferably having a coat weight of about 2 pounds per 3000 ft.sup.2 ; partially insolubilizing the conductive latex precoat; applying to the partially insolubilized latex precoat an aqueous dielectric coating preferably ranging in coat weight from 4.5 to 6.5 pounds per 3000 ft.sup.2 ; and applying to the first low-resistance precoat a second aqueous low-resistance conductive coating preferably ranging in coat weight from 0.5 to 1.5 pounds per 3000 ft.sup.2.Type: GrantFiled: November 30, 1979Date of Patent: October 6, 1981Assignee: International Paper CompanyInventors: William H. Kreiling, Edward S. Jones
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Patent number: 4283474Abstract: An electrophotographic element having a conductive support upon which a coating of oleophilic resin-encapsulated zinc oxide particles, and a sensitizer dispersed in a binder containing vinyl chloride and vinyl acetate polymers is disclosed. Capsule wall can be 5A to 1.mu. thick. The oleophilic resin can be silicone, urethane, epoxy.Type: GrantFiled: September 19, 1980Date of Patent: August 11, 1981Assignee: Konishiroku Photo Industry Co., Ltd.Inventors: Tadashi Kaneko, Takeo Shimura, Masanori Matsumoto, Hiroyuki Moriguchi, Hiroyuki Nomori
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Patent number: 4282118Abstract: An electroconductive polymer composition containing an electroconductive polymer, a fluorosurfactant and a stabilizer.Type: GrantFiled: August 23, 1979Date of Patent: August 4, 1981Assignee: Calgon CorporationInventor: Mei H. Hwang
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Patent number: 4237194Abstract: A coating composition useful in forming conductive layers comprises a latex having water as a continuous phase and, as a dispersed phase, hydrophobic polymer particles having associated therewith a polyaniline salt semiconductor. The coating composition can be coated on a variety of supports to produce conductive elements. The coating compositions are particularly useful in forming antistatic layers for photographic elements or conducting layers for electrophotographic and electrographic elements. Also disclosed is a preferred process for preparing a latex coating composition comprising the steps of loading polymer particles with the polyaniline component of the polyaniline acid addition salt semiconductor and then acidifying the latex to form a polyaniline salt coating composition.Type: GrantFiled: February 16, 1979Date of Patent: December 2, 1980Assignee: Eastman Kodak CompanyInventors: Donald A. Upson, David J. Steklenski
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Patent number: 4234670Abstract: A method for producing visible images in certain charge sensitive, dry processable recording elements. Image recording is accomplished by flowing, in a resistive recording element containing a reducible metal compound, an imagewise pattern of electrical current of sufficient magnitude to produce therein a storable latent image. The metal compound in the latent image areas is subsequently reduced by a dry development technique to produce a visible image.Type: GrantFiled: September 27, 1979Date of Patent: November 18, 1980Assignee: Eastman Kodak CompanyInventors: Joseph Y. Kaukeinen, Duane A. Rockafellow
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Patent number: 4188212Abstract: An electric current conductive composition comprising benzotriazole or a derivative thereof and a substantially electrically insulating binder, which is an essential component of an image recording element. The image recording element comprises a support having thereon a layer of the electric current conductive composition further containing a reducible metal compound, preferably an organic silver salt, a reducing agent, and having on different sides thereof an electrically conductive layer, with at least one of the electrically conductive layers being capable of transmitting actinic radiation. Image recording is accomplished by passing in the image recording element an image-wise pattern of an electric current sufficient to produce therein a storable latent image, followed by heating at least the electric current conductive composition layer to produce a visible image at the areas where the electric current passed through the electric current conductive composition.Type: GrantFiled: August 16, 1977Date of Patent: February 12, 1980Assignee: Fuji Photo Film Co., Ltd.Inventors: Masato Fujiwara, Mitsuharu Nirasawa, Keiji Takeda
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Patent number: 4183747Abstract: An electrophotographic recording element having a paper carrier, in which the paper carrier has been rendered slightly electrically conductive by being subject to a dose of ionizing radiation of from 10.sup.4 to 10.sup.8 rads.Type: GrantFiled: July 14, 1975Date of Patent: January 15, 1980Inventor: John L. Garnett