Readily Visible Image Formation Patents (Class 430/292)
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Patent number: 4966828Abstract: Disclosed is a compound of the general formula ##STR1## wherein L=H or CO--(R.sup.1).sub.n (CX.sub.3).sub.m, M=alkylene, alkenylene, Q=S, Se, O, dialkylmethylene, alken-1,2-ylene, 1,2-phenylene or N-R, with M+Q together forming 3 or 4 ring members, R=alkyl, aralkyl or alkoxyalkyl, R.sup.1 is an aromatic group and X=Cl, Br or I, with n=O and m=1 or n=1 and m=1 or 2. The compounds, on exposure, eliminate HX and form free radicals and are therefore highly effective as acid donors and free radical initiators for photochemical processes.Type: GrantFiled: September 13, 1984Date of Patent: October 30, 1990Assignee: Hoechst AktiengesellschaftInventors: Reinhard Doenges, Hans Ruckert, Ulrich Geissler, Hartmut Steppan
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Patent number: 4965073Abstract: Disclosed is an improved process for preparing the printed circuit board, which comprises coating a photo-curable electrodeposition coating composition on the surface of the copper foil of a copper-clad, laminated plate to form a photo-sensitive resist film thereon, lapping a photographic negative or positive film onto the photo-sensitive resist film, and exposing to an active light, followed by development, the improvement comprising incorporating a colorless or substantially colorless reduction-type leico pigment into the electrodeposition coating composition to form a photo-sensitive resist film containing the leico pigment, and to develop a color in an exposed area of the photo-sensitive resist film by exposing to the active light.Type: GrantFiled: March 21, 1990Date of Patent: October 23, 1990Assignee: Kansai Paint Co., Ltd.Inventors: Tsutomu Maruyama, Kiyotake Fukawa, Atsushi Akiyama, Yoshihiro Kiyomura
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Patent number: 4965174Abstract: A recording medium is provided which comprises a recording layer comprising at least one set of image-forming units containing a region holding a photosensitive protein and a color-developing means capable of developing a color according to a change in the hydrogen ion concentration in the region. Each of said image-forming units within the same set having a photosensitive protein sensitive to a different wavelength.Type: GrantFiled: October 24, 1989Date of Patent: October 23, 1990Assignee: Canon Kabushiki KaishaInventors: Ryuichi Arai, Masahiro Haruta, Nobuko Yamamoto, Tetsuya Yano, Hiroyoshi Kishi, Masanori Sakuranaga
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Patent number: 4962011Abstract: Novel photopolymerizable recording materials suitable in particular for producing photoresist layers and lithographic printing plates are composed of one or more photopolymerizable, olefinically unsaturated organic compounds, optionally a polymeric binder, a photopolymerization initiator, a color-forming system composed of a color former and a photooxidant, a certain benzotriazole compound as a sensitizer and optionally further additive and/or auxiliary substances.Type: GrantFiled: May 17, 1988Date of Patent: October 9, 1990Assignee: BASF AktiengesellschaftInventors: Reinhard Aldag, Peter Neumann, Andreas Boettcher, Thomas Bluemel, Friedrich Seitz
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Patent number: 4948705Abstract: A highlight mask, especially suited for printing from positive color transparencies, is made of photochromic glass which, like Corning PHOTOGRAY EXTRA sunglass lens material, darkens not only under ultraviolet radiation but also under visible radiation in the blue range. The mask is made by mounting, onto its upper surface, a photo transparency and exposing it to flashes of intense light strong in the blue range. Such radiation penetrates the thin or highlight areas of a photo transparency, regardless of their color tint, and creates a negtive highlight-masking image in the glass. While it does not effect general contrast reduction over the entire film area, the highlight masking image requires no further development, remains in registration with the transparency for photoprinting, and fades in time or when heated, so that the glass may be reused.Type: GrantFiled: January 9, 1989Date of Patent: August 14, 1990Inventor: Norman W. Throgmorton
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Patent number: 4942113Abstract: The contrast and sharpness of photoresist images is enhanced by depositing a layer of a photobleachable compound onto the photoresist layer. The photobleachable layer is sensitive to the light used to expose the photoresist and forms a contrast enhancement layer (CEL) on the photoresist layer. Fulgides and photochromic butyrolactones are selected for forming the photobleachable layer. Such compounds can be deposited from a hydrocarbon solution, such as toluene, and are soluble in the standard alkali, photoresist developers. The process is particularly advantageous for producing integrated circuits.Type: GrantFiled: March 6, 1989Date of Patent: July 17, 1990Assignee: Plessey Overseas LimitedInventor: Clive Trundle
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Patent number: 4940649Abstract: Novel photopolymerizable recording materials suitable in particular for producing photoresist layers and lithographic printing plates are composed of one or more photopolymerizable, olefinically unsaturated organic compounds, optionally a polymeric binder, a photopolymerization initiator, a color-forming system composed of a color former and a photooxidant, a certain 4-phenylpyridine as sensitizer and optionally further additive and/or auxiliary substances.Type: GrantFiled: May 17, 1988Date of Patent: July 10, 1990Assignee: BASF AktiengesellschaftInventors: Reinhard Aldag, Peter Neumann, Andreas Boettcher, Thomas Bluemel, Friedrich Seitz, Friedrich-Wilhelm Raulfs
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Patent number: 4937170Abstract: A photographic element formed from a substrate and light sensitive coating on the substrate wherein the coating comprises a mixture of a diazo compound and an aromatic carboxylic coupling agent having phenolic hydroxy groups, in an acidic medium.Type: GrantFiled: March 1, 1988Date of Patent: June 26, 1990Assignee: Hoechst Celanese CorporationInventor: Dieter Mohr
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Patent number: 4935331Abstract: This invention relates to a method for making a dry transfer, photopolymerizable positive-working imaging system which provides a photopolymerizable layer on a support and a colored layer on a substrate. Upon imagewise exposure of the photopolymerizable layer, subsequent lamination of the colored layer to the photopolymerized layer and peel apart, a colored image is produced due to the preferred adhesion of the colored layer to the nonexposed areas of the photopolymerized layer.Type: GrantFiled: October 21, 1988Date of Patent: June 19, 1990Assignee: Hoechst Celanese CorporationInventors: Stephan J. W. Platzer, Stanley F. Wanat
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Patent number: 4925767Abstract: Process for controlling the visual appearance of an image present on a permanent support in the form of a hydrophilic colloid layer, layer system or relief pattern by the transfer of a continuous non-photosensitive layer from a temporary support onto said permanent support either before or after said image is formed thereon, which comprise by pre-wetting the permanent support either image-free or with said image already thereon, containing the pre-wetted support with said continuous layer carried on the temporary support, and stripping off the temporary support to leave the continuous layer adhering on the permanent support, said continuous layer being non-photosensitive and contains hardened gelatin, the gelatin being applied at a coverage of at most 20 g/m2 and having a degree of hardening corresponding with that achieved by the addition of at least 0.001 g of formaldehyde per gram of gelatin.Type: GrantFiled: December 14, 1988Date of Patent: May 15, 1990Assignee: AGFA-Gevaert, N.V.Inventors: Eddie R. Daems, Luc H. Leenders
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Patent number: 4923389Abstract: Negative-working, silver wash-off element comprising, in order, (a) support, (b) photosensitive layer comprising silver halide and hydrophilic macromolecular organic polymer dispersion medium including a dispersed phase of a monomer compound and photoinitiator, and (c) an abrasion overcoat layer. In another embodiment, the wash-off element has between the support and abrasion overcoat layer, nearer the support a layer comprising binder, colorant and photosensitive silver halide and a photosensitive layer comprising silver halide and said hydrophilic macromolecular organic polymer dispersion medium including said dispersed phase. The wash-off element is useful for the preparation of half-tone images.Type: GrantFiled: April 29, 1988Date of Patent: May 8, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventor: Robert P. Held
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Patent number: 4923780Abstract: This invention relates to a process for preparing a reverse image using a pigmented peel-apart element containing a photoinhibitor. More particularly this invention relates to a process for preparing a negative or reverse surprint proof using peel-apart photosensitive elements comprising a strippable cover sheet; a photoadherent layer containing a colorant and a photoinhibitor compound; a tacky, essentially nonphotosensitive contiguous layer; and a support.Type: GrantFiled: December 12, 1988Date of Patent: May 8, 1990Assignee: E. I. Du Pont de Nemours and CompanyInventor: Harvey W. Taylor, Jr.
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Patent number: 4912011Abstract: A light-sensitive material and an image recording method using the same are disclosed. The material comprises a support having provided thereon a light sensitive layer containing at least a light-sensitive silver halide, a reducing agent, a polymerizable compound, and a color image forming substance, wherein at least the polymerizable compound and the color image forming substance are encapsulated in the same microcapsules. The material exhibits high sensitivity and excellent stability with time.Type: GrantFiled: May 31, 1988Date of Patent: March 27, 1990Assignee: Fuji Photo Film Co., Ltd.Inventors: Soichiro Yamamoto, Shun-ichi Ishikawa, Fumiaki Shinozaki, Hideki Ohmatsu
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Patent number: 4873178Abstract: An optical recording medium is provided which comprises a substrate and a colored film formed by electrolytic polymerization on the substrate. The film may be formed on an electroconductive substrate, or it may be transferred onto a non-electroconductive substrates. A method for recording employing the electrolytically polymerized film is also provided.Type: GrantFiled: January 19, 1988Date of Patent: October 10, 1989Assignee: Canon Kabushiki KaishaInventors: Masahiro Haruta, Yoko Kuwae, Hirohide Munakata, Satoshi Yuasa, Etsuko Sugawa
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Patent number: 4871642Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a paper support. A surface of the paper support on which the light-sensitive layer is provided has a low water absorptiveness of not more than 3 g/m.sup.2 which is a value measured according to Cobb test method.Type: GrantFiled: August 4, 1987Date of Patent: October 3, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigehisa Tamagawa, Masayuki Kuroishi
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Patent number: 4833066Abstract: In producing a transfer print, a lacquer layer is deposited on a substrate and, in turn, a color layer, an adhesive layer, another lacquer layer, a talcum layer and a photo layer are placed on the lacquer layer. After a portion of the photo layer is exposed, the non-exposed areas of the photo layer and the other layers in register with the non-exposed areas are removed. After the exposed area of the photo layer is removed along with selected subjacent layers, the end product includes the substrate and the remaining areas of the lacquer area on the substrate, the color layer and the adhesive layer.Type: GrantFiled: January 12, 1987Date of Patent: May 23, 1989Assignee: Grobena AGInventor: Anton Fuchs
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Patent number: 4830947Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a hydrophilic polymer adsorbed on the silver halide, a reducing agent and a polymerizable compound provided on a support, characterized in that the hydrophilic polymer comprises gelatin and a water soluble vinyl polymer having a high physical retardance is disclosed. The ratio of the vinyl polymer to the gelatin ranges from 0.1 to 20 weight %. The physical retardance of the vinyl polymer is not less than 25.0, which is defined as a value measured according to PAGI method.Type: GrantFiled: October 6, 1987Date of Patent: May 16, 1989Assignee: Fuji Photo Film Co., Ltd.Inventor: Yutaka Oka
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Patent number: 4816367Abstract: A multicolor imaging material comprises a substrate, a capsule layer made up of a plurality of heat-meltable microcapsules including color former and a developer material layer. When the laser beams having wavelengths of .lambda..sub.1, .lambda..sub.2, and .lambda..sub.3 are applied to the multicolor imaging material according to the signals corresponding to three primary colors, the heat-meltable microcapsules for individual colors independently generate heat, thereby causing the heat-meltable substance to be melted. This brings about the reaction of the color formers for individual colors with the developer to developer colors, thereby forming a color image comprised of cyan, magenta and yellow.Type: GrantFiled: September 8, 1987Date of Patent: March 28, 1989Assignee: Seiko Instruments Inc.Inventors: Hiromichi Sakojiri, Hiroshi Takahashi
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Patent number: 4814252Abstract: A light-sensitive material comprising a light-sensitive layer containing silver halide, a reducing agent and a polymerizable compound provided on a paper support. A surface of the paper support on which the light-sensitive layer is provided has such a smooth surface that the smoothness value in terms of the Bekk Smoothness is not less than 300 seconds. The Bekk Smoothness is a value measured using the Bekk Tester.Type: GrantFiled: August 14, 1987Date of Patent: March 21, 1989Assignee: Fuji Photo Film Co., Ltd.Inventors: Shigehisa Tamagawa, Masayuki Kuroishi
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Patent number: 4806451Abstract: The invention relates to a process for producing an image on a light-sensitive tonable layer comprising the steps of:(A) exposing the light-sensitive layer imagewise to produce imagewise tacky and complementary non-tacky areas;(B) bringing the imagewise-exposed layer into surface-to-surface contact with a supported non-photosensitive transfer layer containing at least one finely divided powder and/or a dissolved dye in a binder; and(C) separating the transfer layer from the light-sensitive layer, whereby the transfer layer adheres selectively to the imagewise tacky areas,the improvement wherein, the binder of the transfer layer consists essentially of(a) about 55-97 wt. % of at least one polymer in the form of a powder having a minimum film-forming temperature of above 50.degree. C., and(b) about 3-45 wt.Type: GrantFiled: June 24, 1987Date of Patent: February 21, 1989Assignee: E. I. Du Pont de Nemours and CompanyInventor: Helmut H. Frohlich
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Patent number: 4804611Abstract: The present invention provides a method for reducing short time-scale reciprocity failure effects of a photosensitive imaging sheet. The photosensitive imaging sheet comprises a substrate having a layer of microcapsules on one surface thereof. The microcapsules contain an internal phase of an acrylate monomer, photoinitiator, and color former. A portion of the microcapsules of the imaging sheet is image-wise exposed to high intensity light and then allowed to recover from the exposure. The exposure and recovery steps are repeated to form a latent image. By pulsing the light onto the photosensitive imaging sheet, the total exposure energy required per unit area is significantly reduced compared to the known short time-scale exposure method.Type: GrantFiled: June 24, 1987Date of Patent: February 14, 1989Assignee: The Mead CorporationInventor: Timothy R. Geis
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Patent number: 4789619Abstract: A positive-working radiation-sensitive mixture is described that contains (a) a radiation-sensitive compound which forms a strong acid under the action of actinic radiation, (b) a compound with at least one C--O--C bond cleavable by acid, (c) a binder which is insoluble in water but soluble in aqueous-alkaline solutions, and (d) a polymethine dye. The polymethine dyes used are hemioxonol dyes or symmetrical cyanine dyes. In the light-sensitive mixture, these dyes effect high sensitization and high image sharpness contrast which, in addition, is substantially irreversible.Type: GrantFiled: November 24, 1986Date of Patent: December 6, 1988Assignee: Hoechst AktiengesellschaftInventors: Hans Ruckert, Joachim Knaul
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Patent number: 4782006Abstract: An optical recording method comprises the steps of:(A) irradiating a radiation corresponding to a recording information on an optical recording medium having a recording layer containing a diacetylene derivative and at least one selected from the group (hereinafter called the group B) consisting of azulenium salt compounds, pyrylium dyes, diene compounds, croconic methine dyes and polymethine compounds, thereby forming a latent image; and(B) irradiating a radiation on the recording medium having said latent image formed thereon to thereby visualizing said latent image.Type: GrantFiled: December 10, 1986Date of Patent: November 1, 1988Assignee: Canon Kabushiki KaishaInventors: Yukuo Nishimura, Ken Eguchi, Kunihiro Sakai, Haruki Kawada, Hiroshi Matsuda, Takashi Nakagiri, Toshihiko Miyazaki, Yoshinori Tomida, Toshiaki Kimura, Kenji Saito
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Patent number: 4780393Abstract: Upon imagewise exposure, a photopolymerizable composition which contains(a) a polymeric binder;(b) a compound that has at least one terminal ethylenic double bond and a boiling temperature, at standard pressure, of above 100.degree. C., and that can form a polymer by polymerization initiated by a free-radical process;(c) a photoinitiator;(d) a leuco base of a triarylmethane dye; and(e) a photochromic spiro-indolino-benzopyran compound represented by the formula ##STR1## wherein R denotes a hydrogen atom or a C.sub.1 -to-C.sub.16 alkyl group,R.sup.1, R.sup.2, R.sup.3 and R.sup.4 are identical or different, and each denotes a hydrogen or a halogen atom, a C.sub.1 -to-C.sub.4 alkyl or alkoxy group, or a nitro group, andR.sup.5, R.sup.6, R.sup.7 and R.sup.8 are identical or different, and each denotes a hydrogen or a halogen atom, a nitro or an amino group, a C.sub.1 -to-C.sub.5 alkyl or alkoxy group, or a C.sub.6 -to-C.sub.Type: GrantFiled: January 22, 1987Date of Patent: October 25, 1988Assignee: Hoechst AktiengesellschaftInventor: Hans-Dieter Frommeld
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Patent number: 4777111Abstract: This invention relates to a composition and method for enhancing the contrast of images of an underlying photolithographic layer. A photographic element, including a photoresist layer, is applied to a substrate. The photoresist layer contains a contrast-enhancing layer including at least one light-sensitive compound capable of producing acidic photoproducts upon exposure to actinic radiation, at least one indicator dye that changes color on exposure to acidic conditions and at least one polymeric binder soluble in water or weakly alkaline aqueous solutions. The photographic element is exposed to active radiation sufficient to cause photobleaching of the contrast enhancement layer and exposure of the photoresist layer. The photographic element is exposed to actinic radiation sufficient to cause photobleaching of the contrast enhancement layer and exposure of the photoresist layer.Type: GrantFiled: March 23, 1987Date of Patent: October 11, 1988Assignee: Fairmount Chemical Company, Inc.Inventors: David B. Blumel, Albert S. Deutsch
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Patent number: 4772534Abstract: A light-sensitive composition containing a novel light-sensitive s-triazine compound represented by the formula (I) as a free radical-generating agent is disclosed. The s-triazine compound responds radiation in the range of the near ultraviolet to visible light, shows high sensitivity for photolysis and, therefore, the compositon has high light-sensitivity.Type: GrantFiled: September 5, 1986Date of Patent: September 20, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Kouichi Kawamura, Hirokazu Kondo, Yoshimasa Aotani
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Patent number: 4769257Abstract: A foamed plastics substrate has an image formed on its surface by differential ablation by a laser. A composition is applied to the surface in the shape of the image to be formed and has an ablation rate different to that of the foam. After irradiation of the surface, the image is formed in relief on the surface.Type: GrantFiled: October 9, 1987Date of Patent: September 6, 1988Inventors: Walter W. Duley, Theodore A. Bieler
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Patent number: 4764451Abstract: An image-forming method which comprises:imagewise exposing a light-sensitive material comprising a light-sensitive layer provided on a support wherein the light-sensitive layer contains silver halide, a reducing agent, a polymerizable compound and a photo-polymerization initiator;simultaneously or thereafter developing the light-sensitive material to polymerize the polymerizable compound within the area where the latent image of the silver halide has been formed;pressing the light-sensitive material on an image-receiving material to transfer unpolymerized polymerizable compound to the image-receiving material; andirradiating the image-receiving material with a light.Type: GrantFiled: January 12, 1987Date of Patent: August 16, 1988Assignee: Fuji Photo Film Co., Ltd.Inventor: Shunichi Ishikawa
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Patent number: 4762766Abstract: A dry transfer film and a method for preparing transfer characters therefrom in which the transfer film includes a carrier layer, a photosensitized color carrying layer disposed adjacent to the carrier layer and a photosensitized adhesive layer disposed adjacent to the color carrying layer. Both the color carrying and adhesive layers are photosensitive to certain respective wavelengths of the electromagnetic spectrum so that when exposed to such wavelengths, they become soluble in a respective solvent or solvents. The unexposed portions of these layers remain insoluble in such solvents.Type: GrantFiled: January 14, 1986Date of Patent: August 9, 1988Assignee: Kroy Inc.Inventor: Kenneth M. Melbye
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Patent number: 4761360Abstract: A light-sensitive material comprising a light-sensitive layer which contains silver halide, a reducing agent and a polymerizable compound provided on a support, characterized in that the light-sensitive layer further contains a silver diazotate having the following formula:Ar--N.dbd.N--O--Ag(L).sub.nin which Ar is an aryl group or a heterocyclic group, each of which may have one or more substituent groups; L is a ligand; and n is 0, 1 or 2. Image-forming methods utilizing the light-sensitive materials are also disclosed.Type: GrantFiled: February 24, 1987Date of Patent: August 2, 1988Assignee: Fuji Photo Film Co., Ltd.Inventors: Kozo Sato, Soichiro Yamamoto
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Patent number: 4758497Abstract: The invention features a new series of triazine compounds which are characterized by their ability to generate free radicals upon irradiation in a desired optical region, such that they are useful in the fabrication of lithographic plates having improved exposure speed, development, print-out, and contrast characteristics.Type: GrantFiled: April 17, 1987Date of Patent: July 19, 1988Assignee: Polychrome CorporationInventors: Ajay Shah, William Rowe
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Patent number: 4748102Abstract: Photographic images may be produced on a backing such as paper and polyester sheets, from photographic negatives which encompass line rendering, design comps, copy, complex color separation or the like with water-based varnishes and pigments, the resulting images closely resembling, if not exactly, the same image in its commercially printed form. Thus all aspects of color proofs produced by this invention provide greatly improved predictability as to the appearance of the final printed job, with a further improvement of cost savings over conventional techniques of preparing color proofs. Also, said proofing method can be used to provide a "transfer" so that one may transfer the colored image or images to a more suitable or required backing.Type: GrantFiled: May 29, 1986Date of Patent: May 31, 1988Inventors: Edward L. Weller, Jr., Edward Renkor, Edward L. Weller, III
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Patent number: 4729935Abstract: A process for the production of photographic images utilizing a photographic element comprising a transparent support and a coating on the support comprising a diazonium composition having a light absorbency of about 45% or less, and a colorant composition, said coating having a light transmission of not more than about 0.1%.Type: GrantFiled: October 18, 1985Date of Patent: March 8, 1988Assignee: Hoechst Celanese CorporationInventors: John E. Walls, Major S. Dhillon
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Patent number: 4710447Abstract: A method and photo-sensitive ink solution used for producing a tone-accurate color process proof or color transfer is disclosed. The method includes multiple applications of sequential layers of extender coat powder and photo-sensitive ink solution coats. These layers are individually exposed to actinic light through a design bearing film, and that material not underlying the exposed ink coat is removed by means of a light water spray before a new series of sequential layers are applied.Type: GrantFiled: December 22, 1986Date of Patent: December 1, 1987Assignee: Castcraft Industries, Inc.Inventor: Manny Kreiter
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Patent number: 4705739Abstract: A radiation-sensitive, imageable article comprises in sequence a substrate, a vapor-deposited colorant layer capable of providing a reflection optical density of at least 0.6 to a 10 nm band of the electromagnetic spectrum between 280 and 900 nm, a vapor-deposited metal or metalloid layer of uniform composition, and a photosensitive resist layer which is non-integral with said colorant layer, the ratio of the thickness of said colorant layer to said metal or metalloid layer being at least 7:1.Type: GrantFiled: April 24, 1986Date of Patent: November 10, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Richard S. Fisch
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Patent number: 4704347Abstract: A method of manufacturing a semiconductor device, in which there is applied to a surface of a semiconductor substrate a base layer of photosensitive lacquer, which is coated with a top layer of photosensitive lacquer. By means of a first patterned irradiation, there is formed in the top layer a mask of which a contact copy is formed in the base layer during a second irradiation. A material which can be discolored is used for the top layer. During the first irradiation, the top layer is locally discolored, whereupon the layer thus discolored is used as a mask during the second irradiation. By the use of the discoloring top layer, additional processing steps, which would ensure from a wet development of the top layer, are avoided.Type: GrantFiled: January 29, 1986Date of Patent: November 3, 1987Assignee: U.S. Philips CorporationInventors: Franciscus A. Vollenbroek, Jan G. Dil, Henricus J. J. Kroon, Elisabeth J. Spiertz, Wilhelmus P. M. Nijssen
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Patent number: 4696888Abstract: Light-sensitive compounds are described which have the formula ##STR1## wherein R.sup.1 and R.sup.2 denote H or alkyl, R.sup.3 and R.sup.4 denote H or 4,6-bis-trichloromethyl-s-triazin-2-yl, R.sup.5 and R.sup.6 denote H or halogen, alkyl, alkenyl or alkoxy, and Ar denotes a mononuclear to trinuclear aromatic group.These compounds are suitable as photoinitiators for free-radical polymerizations or as photolytic acid donors for acid-cleavable compounds, and for cross-linking and color formation reactions. They are distinguished by a high sensitivity in various spectral ranges.Type: GrantFiled: July 30, 1986Date of Patent: September 29, 1987Assignee: Hoechst AktiengesellschaftInventor: Gerhard Buhr
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Patent number: 4695527Abstract: A photopolymerizable composition is disclosed which comprises: (a) a free-radically polymerizable compound, (b) a polymeric binder, (c) a photopolymerization initiator, (d) a compound which is thermally crosslinkable with the polymeric binder, with a polymerization product of (a) or with itself, and (e) a pigment. The disclosed composition is used for applying markings to printed circuits and preferably is applied to the solder-resist layer using a dry-resist process, is exposed and then developed, either separately or together with the solder-resist layer.Type: GrantFiled: June 17, 1986Date of Patent: September 22, 1987Assignee: Hoechst AktiengesellschaftInventors: Ulrich Geissler, Heide Lampas
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Patent number: 4690886Abstract: A method for making a dry planographic printing plate, which comprises: exposing through a negative transparency a dry negative working presensitized plate comprising a base substrate having provided thereon, in order, a photosensitive layer containing an orthoquinonediazide compound and a silicone rubber layer; developing the exposed plate; exposing the developed plate to light so as to make its exposure value not less than 5% of the exposure value at the time of the exposure through the negative transparency; and then treating the exposed plate with a basic compound.Type: GrantFiled: February 13, 1985Date of Patent: September 1, 1987Assignee: Fuji Photo Film Co., Ltd.Inventors: Yasuhisa Naritomi, Hiroshi Takahashi, Keisuke Shiba
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Patent number: 4687726Abstract: Disclosed are a novel photosensitive recording material and a method for using the recording material in the production of planographic printing plates. The recording material comprises a support and a negative-working photosensitive layer that contains a diazonium salt polycondensation product as the photosensitive compound and, in addition, a colorless inorganic pigment which is insoluble in water and organic solvents and which has an average particle diameter from 1 to 20 .mu.m. The pigment is present in a quantity from 0.01 to 2% by weight, relative to the non-volatile constituents of the layer, and is evenly distributed in the layer. Due to the pigment content, a rough layer surface is formed, which has the effect of reducing the time required for creating a vacuum in a vacuum frame into which the recording material is mounted. The presence of the pigment in the layer also produces an improved tonal rendering in the print obtained.Type: GrantFiled: May 8, 1985Date of Patent: August 18, 1987Assignee: Hoechst AktiengesellschaftInventors: Gunter Schlogl, Gerhard Mack, Manfred Michel
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Patent number: 4681824Abstract: A fluorescent screen of a color picture tube is manufactured by the steps of forming a film of substance which becomes sticky when exposed to light on an inner surface of a panel of the tube, exposing predetermined portion of the film through a shadow mask to render sticky the exposed portions, repeatedly applying powders of phosphors of respective colors onto the portions which became sticky so as to form phosphor picture elements of respective colors, exposing portions of the film other than the predetermined portions to render them sticky, and applying a powder of graphite to the portions other than the predetermined portions to form a black matrix film.Type: GrantFiled: April 16, 1982Date of Patent: July 21, 1987Assignee: Hitachi, Ltd.Inventor: Yoshifumi Tomita
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Patent number: 4668608Abstract: There are disclosed negative-working resist compositions featuring a binder and a radiation-sensitive compound that loses HX upon exposure, to become less soluble in an aqueous base. X is selected from the group consisting of --CN, halide, and --SO.sub.2 R.sup.1 and R.sup.1 is alkyl of 1-5 carbon atoms or aryl of from 6 to 10 carbon ring atoms.Type: GrantFiled: September 2, 1986Date of Patent: May 26, 1987Assignee: Eastman Kodak CompanyInventor: Michael J. Lindstrom
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Patent number: 4661433Abstract: Aryl nitrones, of the type used in contrast enhancement photolithography techniques, are stabilized by adding thereto a drying agent such as molecular sieve, silica gel or an alkylalkoxysilane. The resulting compositions are substantially storage stable.Type: GrantFiled: December 31, 1984Date of Patent: April 28, 1987Assignee: General Electric CompanyInventor: Gary C. Davis
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Patent number: 4659649Abstract: The invention provides new compositions which change color on exposure to actinic radiation and contain a photosensitive onium, e.g. iodonium or sulphonium, salt and a dyestuff which changes color when protonated. The compositions may also include a resin, especially a resin curable by the onium salt when the latter is exposed, and preferably an epoxy resin. The compositions are useful especially as coatings, e.g. for making screen stencils or for producing lithographic printing plates.Type: GrantFiled: April 30, 1984Date of Patent: April 21, 1987Assignee: Sericol Group LimitedInventors: Peter Dickinson, Michael Ellwood
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Patent number: 4657840Abstract: A radiation-sensitive, imageable article comprises in sequence a substrate, a vapor-deposited colorant layer capable of providing an optical density of at least 0.3 to a 10 nm band of the electromagnetic spectrum between 280 and 900 nm, and a vapor-deposited graded metal/metal oxide or metal sulfide layer.Type: GrantFiled: July 8, 1986Date of Patent: April 14, 1987Assignee: Minnesota Mining and Manufacturing CompanyInventor: Richard S. Fisch
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Patent number: 4634657Abstract: Photoimaging compositions comprising (a) substituted dibromoethane as defined, e.g., 1,2-dibromotetrachloroethane, 1,2-dibromo-1,1-dichloroethane, etc. and (b) leuco dye. Photoimaging photopolymerizable compositions consist essentially of (a) substituted 1,2-dibromoethane as defined, (b) leuco dye, (c) at least one ethylenically unsaturated compound, (d) photoinitiator taken from the group consisting of -4-trichloromethyl-4-methyl-2,5-cyclohexadienones, benzophenones, alkylaryl ketones, and mixtures thereof; and optionally (e) at least one organic polymeric binder. The compositions are useful to provide a printout image and in admixture with a variety of initiators or initiator systems and ethylenically unsaturated compounds provide photopolymerizable compositions having good printout images.Type: GrantFiled: August 23, 1984Date of Patent: January 6, 1987Assignee: E. I. Du Pont de Nemours and CompanyInventor: Bruce Holman, III
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Patent number: 4632899Abstract: An image-recording process is disclosed, which comprises using a photopolymerizable element comprising a polymerizable vinyl monomer and/or a polymerizable prepolymer, a photopolymerization initiator and a dye capable of being bleached with said vinyl monomer and/or prepolymer or a dye precursor capable of producing the bleachable dye upon being heated, conducting imagewise exposure to polymerize the photopolymerizable element, and heating it to bleach the dye with non-polymerized monomer and/or non-polymerized prepolymer remaining in portions not exposed or exposed or to bleach dye produced from the dye precursor upon heating. A negative working image-recording material for this process is also disclosed.Type: GrantFiled: December 3, 1984Date of Patent: December 30, 1986Assignee: Fuji Photo Film Co., Ltd.Inventor: Keiji Takeda
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Patent number: 4629676Abstract: An image forming method is disclosed, comprising forming a latent image by imagewise exposing a recording material including a light-sensitive silver salt, a reducing agent, a polymerizable compound, and a binder, on a support, and subsequently subjecting said recording material to a substantially uniform heating at about 80.degree. C. or more under conditions substantially not containing water, thereby forming a polymeric compound in areas where the latent image of the light-sensitive silver salt has formed.Type: GrantFiled: September 12, 1985Date of Patent: December 16, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Yoshihide Hayakawa, Masato Satomura, Kozo Sato
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Patent number: 4621040Abstract: A method for forming an image which comprises imagewise exposing an imaging element with a laser, said imaging element comprising a support carrying on a first surface, in sequence, a layer of microcapsules containing an ink, and a laser-absorptive, ink barrier layer; superposing an imaging-receiving layer adapted to receive ink from said microcapsules over said imaging element and rupturing said microcapsules; whereby ink from said microcapsules in the exposed areas of the imaging element diffuses to said superposed receiving layer forming an image corresponding to the laser exposure.Type: GrantFiled: October 21, 1985Date of Patent: November 4, 1986Assignee: Polaroid CorporationInventor: Michael S. Viola
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Patent number: 4598036Abstract: A print-out composition containing a leuco dye and a photooxidizing agent is described, said print-out composition containing at least one carbazomethane compound represented by formula (I) as the leuco dye ##STR1## wherein Y represents an amino group-substituted phenyl group represented by formula (Ia) ##STR2## or an indolyl group represented by formula (Ib) ##STR3## wherein X.sub.1 and X.sub.2 each represents a hydrogen atom, an unsubstituted alkyl group, or an alkyl group substituted by a halogen atom, a hydroxy group, a cyano group, or a lower alkoxy group, said alkyl group having up to 12 carbon atoms, a cycloalkyl group, a phenyl group, a benzyl group, or a phenyl or benzyl group substituted by a halogen atom, a lower alkyl group, or a lower alkoxy group, or said X.sub.1 and X.sub.2 together may form a 5-membered or 6-membered heterocyclic group together with the nitrogen atom bonded thereto; X.sub.Type: GrantFiled: September 10, 1984Date of Patent: July 1, 1986Assignee: Fuji Photo Film Co., Ltd.Inventors: Masayuki Iwasaki, Minoru Maeda, Fumiaki Shinozaki, Sadao Ishige