Patents Examined by Judson R. Hightower
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Patent number: 4006022Abstract: A recording process using at least one organic compound capable of exhibiting two or more different physical forms at the same temperature which may be converted to one another, and irradiating the organic compound with electromagnetic waves, and thereafter, converting in either the irradiated portion of the organic compound or the non-irradiated portion thereof, the physical form in existence before the irradiation with the electromagnetic waves to another physical form.Type: GrantFiled: November 19, 1973Date of Patent: February 1, 1977Assignee: Fuji Photo Film Co., Ltd.Inventors: Shuichi Ohtsuka, Seiichi Taguchi, Satoru Honjo
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Patent number: 4003742Abstract: A system employing at least one separation roller continuously contacting the outside surface of a web and tracked to move in a fixed approximately elliptical path, for compensating for web motion during separation of the web from another surface to enable a bead of accumulated material built up at the line of contact between the web and the other surface to pass therebetween without changing the web velocity. During the separation period, the advancing velocity of at least one surface is reduced so that at least one surface is advanced at a slower rate than its rate prior to separation, or stopped. In a preferred embodiment, the system is employed in photoelectrophoretic imaging to bypass a bead of imaging suspension built up at the imaging nip during separation of two webs immediately after completion of imaging to thereby permit dissipation or passage of the liquid bead without changing the advancing web velocity by reason of the separation operation.Type: GrantFiled: November 17, 1975Date of Patent: January 18, 1977Assignee: Xerox CorporationInventors: Earl V. Jackson, Roger G. Teumer, LeRoy Baldwin
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Patent number: 4001014Abstract: An electrophotographic photosensitive plate having, in order from the bottom up, an electrically conductive substrate, a photosensitizing layer composed of vitreous selenium and tellurium having a thickness of 0.1 to 3 microns, and a top organic layer including polyvinyl carbazole or a derivative thereof, the photosensitizing layer being composed of a first layer of 0.05 to 2 microns in thickness having 60 to 90 weight % of selenium and 40 to 10 weight % of tellurium and a second layer of 0.05 to 1 micron in thickness having a higher concentration of selenium than that of the first layer, and the second layer being positioned between the first layer and the top organic layer. This invention also provides a process of producing a latent electrostatic image on the plate by providing a negative electrostatic charge thereon and exposing the plate to a light image of visible light having a wavelength in the range of 4000 to 8000A.Type: GrantFiled: September 12, 1974Date of Patent: January 4, 1977Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Eiji Ando, Yoshiki Hayashi
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Patent number: 3999988Abstract: A method of real-time color masking is disclosed wherein pairs of color filters are inserted at specific locations in the optical paths of an electro-optical image multiplication system to thereby produce a modulated radiation pattern representative of the product of the reflectance of the positive of one color component and the negative of other color components of the original.Type: GrantFiled: July 29, 1974Date of Patent: December 28, 1976Assignee: Xerox CorporationInventors: Paul G. Roetling, Dorian Kermisch
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Patent number: 3992204Abstract: An electromagnetic radiation sensitive copy medium and method for producing positive or negative copies electrostatically. In a first embodiment the copy medium includes a poled, radiation transmissive, pyroelectric insulative layer, an electrically conductive layer, and a photoconductive layer interposed between and electrically connected with the insulative and conductive layers. A second embodiment includes two insulative layers, a photoconductive layer that is interposed between the insulative layers, and an electrically conductive layer that is juxtaposed with one of the insulative layers. A third embodiment is basically similar to the first embodiment except that it includes a plurality of photoconductive layers, each being sensitive to a single, but different, color of light.Type: GrantFiled: August 6, 1973Date of Patent: November 16, 1976Assignee: Minnesota Mining and Manufacturing CompanyInventor: Allen L. Taylor
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Patent number: 3992205Abstract: This invention relates to electrophotographic recording material comprising an electrically conductive carrier material having thereon a photoconductive multi-layer system of a charge carrier producing dyestuff layer or organic material and an insulating, organic, covering layer thereon with at least one charge carrier transporting compound, said dyestuff layer comprising at least two pigment dyes absorbing in different spectral regions, i.e. in the region of relatively long waves and in the region of relatively short waves.Type: GrantFiled: October 22, 1974Date of Patent: November 16, 1976Assignee: Hoechst AktiengesellschaftInventor: Wolfgang Wiedemann
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Patent number: 3992208Abstract: A photo-sensitive etchant comprising (1) a first composition comprising a substance capable of producing water upon exposure to light, a binder and a solvent and (2) a second composition comprising a compound capable of producing, upon exposure to light, a metal-etching substance or a substance which reacts with another other substance to form a metal-etching product, a binder and a solvent; and a method for forming metal image by using the photosensitive etchant.Type: GrantFiled: March 12, 1974Date of Patent: November 16, 1976Assignee: Fuji Photo Film Co., Ltd.Inventors: Masayoshi Nagata, Gyoji Suzuki, Takeshi Tomotsu
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Patent number: 3986871Abstract: The invention is an improved modulator, in the form of a screen, having the capability of selectively passing therethrough charged particles, such as gas ions, in accordance with a pattern that corresponds to the image and non-image areas of a graphic original. The apertured modulator is formed from a metal screen, such as a 200 mesh wire screen, having a wire cross section of 0.051 millimeter and is overcoated with a four-micron thickness of a photoconductor, such as selenium or an organic photoconductor, over which is next applied an equal thickness of an insulating layer, such as polystyrene. The three-layered modulator constructed in this manner is imparted a charge pattern corresponding to the graphic subject to be reproduced by the creation of a charge distribution system (CDS) on the insulating surface. The CDS created on the modulator in the environment of this invention is completely passive to electromagnetic radiation.Type: GrantFiled: December 12, 1973Date of Patent: October 19, 1976Assignee: Addressograph-Multigraph CorporationInventors: John D. Blades, Jerome E. Jackson
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Patent number: 3985663Abstract: A method and ink composition for development of an electrostatic latent image with liquid developer is disclosed. The liquid developer has a viscosity suitable for convenient application to an imaged surface in the development of latent electrostatic images and has improved conductivity resulting from incorporating conductivity control agents in the form of quaternary ammonium compounds which are soluble in the carrier of the ink composition. The conductive ink composition comprises a coloring agent, optionally a binder and a dispersing agent, a carrier and a quaternary ammonium compound soluble in the liquid carrier.Type: GrantFiled: March 14, 1974Date of Patent: October 12, 1976Assignee: Xerox CorporationInventors: Chin H. Lu, Richard A. Parent
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Patent number: 3984241Abstract: An apparatus for making photocopies is disclosed with a photoconductor belt adapted to move around a roller assembly with a cartridge which contains belt replacement segments. The roller assembly meshes with the cartridge to enable rapid continuous movement of the photoconductor which passes a flat region where the belt receives a flash exposure of an object. A mechanism and method for continually replacing the photoconductor belt with incremental fresh segments from the cartridge is described to provide gradual replacement thereof with a long effective usable lifetime for the photoconductor belt and cartridge assembly.Type: GrantFiled: November 5, 1974Date of Patent: October 5, 1976Assignee: Pitney-Bowes, Inc.Inventors: Ernst Schrempp, Henry S. Hazelton, Jr.
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Patent number: 3982938Abstract: Improved toner particles each comprising an intimate mixture of a photoconductive pigment and an insulating binder capable of transporting charge carriers when the charge carriers are injected therein from the pigment, the proportion of the total volume of the pigment in the toner particle being 2 to 30 volume percent of the toner particle and the insulating binder being substantially transparent to the light in the region of the spectrum to which the pigment is sensitive. The toner particle may have therein a core or cores of a material which is substantially transparent to the light in the spectral-sensitive region of the pigment. The toner particles have improved surface durability and can be used repeatedly.Type: GrantFiled: February 12, 1974Date of Patent: September 28, 1976Assignee: Fuji Photo Film Co., Ltd.Inventors: Satoru Honjo, Hajime Miyatuka, Seiji Matsumoto
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Patent number: 3980474Abstract: An ion modulator process capable of producing copies of high contrast and with low background utilizes a constant charge density applied in the dark to set up uniform fringing fields which block ions directed towards background (light) areas. Funneling fields are set up in image (dark) areas in opposition to the original uniform fringing fields by simultaneous imaging and ion projection decreasing the effect of such fringing fields and permitting ions to pass through the modulator in image areas.Type: GrantFiled: October 16, 1974Date of Patent: September 14, 1976Assignee: Addressograph Multigraph CorporationInventor: Jerome E. Jackson
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Patent number: 3973953Abstract: A method is set forth for extending the dynamic range of imagewise exposure systems by transmitting the electromagnetic radiation image through two angularly displaced cylindrical lens arrays and then to a photosensitive surface so that the image at the photosensitive surface is imperfect.Type: GrantFiled: December 28, 1973Date of Patent: August 10, 1976Assignee: Xerox CorporationInventor: Anthony J. Montgomery
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Patent number: 3973960Abstract: Electrophotographic recording material composed of a layer of selenium, selenium alloys, or selenium compounds, with arsenic as a additive, disposed on a conductive carrier is given improved properties by forming the layer to have a total arsenic content of 1 to 20%, by weight, and a concentration gradient such that the arsenic concentration decreases from the exposed surface of the layer in the direction toward the carrier and has a concentration of at least 13% at the exposed surface of the layer.Type: GrantFiled: February 1, 1974Date of Patent: August 10, 1976Assignee: Licentia Patent-Verwaltungs-G.m.b.H.Inventors: Hartmut Dulken, Gottfried Guder, Karl-Heinz Kassel
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Patent number: 3973955Abstract: This apparatus is disclosed for developing electrostatic latent images, comprising a developer supply unit having a first liquid repellent layer with a thickness in the range of 3 - 400.mu. (preferably 5 - 330.mu.). The first layer is disposed on a surface of a substrate, having a plurality of closely spaced pores distributed uniformly over the entire surface of the substrate and penetrating to the back surface thereof. A liquid developer is supplied to a first or back surface of this unit. A photoconductive sensitive plate is spaced closely to a front or second surface of the developer supply unit, to attract the developer to exude through the pores from the first surface of the said liquid repellent layer. More specifically, an electrostatic voltage is applied between the developer supply unit and the photoconductive sensitive plate to provide an electrostatic latent image preformed of electrostatic charges.Type: GrantFiled: January 29, 1974Date of Patent: August 10, 1976Inventors: Genji Ohno, Eiichi Inoue
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Patent number: 3973958Abstract: A method is set forth for increasing the sensitivity and speed of a deformation imaging system. A lenticular lens array is interpositioned between the deformation imaging member and the imaging lens to thereby focus the radiation into a sharp relatively high intensity dot or line pattern.Type: GrantFiled: December 28, 1973Date of Patent: August 10, 1976Assignee: Xerox CorporationInventor: Lloyd F. Bean
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Patent number: 3973954Abstract: A method is set forth for extending the dynamic range of imagewise exposure systems by transmitting the electromagnetic radiation image through a lenticular lens array and then to a photosensitive surface so that the image at the photosensitive surface is imperfect.Type: GrantFiled: December 28, 1973Date of Patent: August 10, 1976Assignee: Xerox CorporationInventor: Lloyd F. Bean
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Patent number: 3973957Abstract: A method is set forth for increasing the sensitivity and speed of a deformation imaging system. Two angularly displaced lenticular lens arrays are interpositioned between the imaging member and the imaging lens to thereby focus the radiation into a sharp relatively high intensity dot pattern.Type: GrantFiled: December 28, 1973Date of Patent: August 10, 1976Assignee: Xerox CorporationInventor: Anthony J. Montgomery
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Patent number: 3969113Abstract: A photoconductive binder layer comprising a particulate mixture of photosensitive titanium dioxide and photosensitive cadmium pigment dispersed in an insulating resin binder.Type: GrantFiled: July 23, 1973Date of Patent: July 13, 1976Assignee: Rank Xerox Ltd.Inventor: Hajime Miyatuka
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Patent number: 3964905Abstract: A color photographic cine or TV film on which a sound recording band or track can be formed without the necessity for a specific additional treatment comprising a film base having thereon at least a silver halide emulsion layer containing a coupler capable of forming a dye by the coupling reaction with the oxidation product of an aromatic primary amino developing agent, and at least one of the emulsion layers of the color photographic material containing a bleach inhibitor in only the portion defined as the sound recording track.Type: GrantFiled: March 13, 1974Date of Patent: June 22, 1976Assignee: Fuji Photo Film Co., Ltd.Inventors: Takeshi Hirose, Yasushi Oishi, Tadao Sakai