Mounted On Rotatable Shaft (e.g., Swinging Arm Or Hammer, Etc.) Patents (Class 96/33)
  • Patent number: 4106943
    Abstract: An organic solvent- or water-developable photosensitive composition consisting essentially of a ring-opened polymer or copolymer of at least one norbornene derivative having at least one substituent selected from the group consisting of ester groups, nitrile groups, carboxyl groups, amide groups, imide groups, hydroxyl groups, halogens and carboxylic acid anhydride groups, or a ring-opened copolymer of at least one said norbornene derivative and at least one cycloolefin other than cyclohexene, or a hydrolysis product of said ring-opened polymer or copolymer and a photosensitive crosslinking agent or photosensitizer soluble in organic solvents or water. The above photosensitive composition is excellent in sensitivity, adhesion and stability.
    Type: Grant
    Filed: October 13, 1976
    Date of Patent: August 15, 1978
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Hiroharu Ikeda, Seiji Aotani, Yoshiyuki Harita
  • Patent number: 4105450
    Abstract: A positive light-sensitive composition containing: (a) a quinonediazide type, positive light-sensitive substance and (1) (b) at least one compound selected from the group consisting of those compounds represented by the following general formulae (I) ##STR1## wherein X.sub.1 and X.sub.2 each represents an oxygen atom or a sulfur atom; R.sub.1 and R.sub.2 each represents a hydrogen atom, an alkyl group, an aralkyl group, an aryl group or a cycloalkyl group; (2) those compounds represented by the general formula (II) ##STR2## wherein R.sub.3 represents a hydrogen atom, an alkyl group, an aralkyl group, an aryl group or a cycloalkyl group; and R.sub.4 represents a hydrogen atom, an alkyl group or a cycloalkyl group; and (3) o-benzoic acid sulfimide.
    Type: Grant
    Filed: May 25, 1976
    Date of Patent: August 8, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Fumiaki Shinozaki, Tomoaki Ikeda
  • Patent number: 4103616
    Abstract: Waterless lithographic printing masters of improved contrast are provided by a coating suitable master substrate with a silicone elastomer gum having reactive pendant hydroxyl or amino groups, reacting a photo and/or thermally reactive azide with said pendant groups, depositing a particulate image pattern on said silicone comprising a thermoplastic organohydrocarbon polymer and crosslinking said silicone and chemically bonding said organohydrocarbon to said silicone to form a durable imaged waterless lithographic printing master.
    Type: Grant
    Filed: April 27, 1977
    Date of Patent: August 1, 1978
    Assignee: Xerox Corporation
    Inventors: Joseph Y. Chu, Richard L. Schank
  • Patent number: 4104072
    Abstract: A method for producing a water developable lithographic printing plate which comprises treating at least one surface of a metal sheet substrate with a layer of a lithographically suitable, light sensitive, water soluble substance and subsequently coating the thus treated base sheet with an upper layer of a water insoluble, ink receptive, lithographically suitable photosensitive composition. Said photosensitive layers must be either both positive working or both negative working. Upon imagewise exposure through a mask by standard methods the exposed areas of said upper photosensitive composition are alternatively characterized as either water permeable or water impermeable and the unexposed areas are alternatively water impermeable or water permeable as opposed to the exposed areas. Upon said imagewise exposure, the exposed lower level areas in a negative system are rendered water insoluble whereas the exposed lower level areas in a positive system are rendered more water soluble than the unexposed areas.
    Type: Grant
    Filed: May 19, 1977
    Date of Patent: August 1, 1978
    Assignee: Polychrome Corporation
    Inventors: Eugene Golda, Alan Leonard Wilkes, Simon Long Chu
  • Patent number: 4101322
    Abstract: A composition for improving the ink receptivity of lithographic printing images comprises an organic solvent liquid capable of softening the surface of the printing image and a film forming alkali-resistant oleophilic material such as a liquid hydrocarbon solution of a normally solid hydrocarbon or fat. The composition is for use in the case where the printing image is formed by alkaline development of an image-wise exposed radiation sensitive coating such as a phenol formaldehyde resin in admixture with a sensitiser. The composition may be applied before exposure to form an alkali resistant oleophilic layer on the radiation sensitive coating or it may be applied after image-wise exposure but before alkali development.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: July 18, 1978
    Assignee: Vickers Limited
    Inventor: Leslie Edward Lawson
  • Patent number: 4098188
    Abstract: This invention relates to a printing plate comprising a support bearing either(A) a layer comprising particles each containing a hydrophilic metal core and an oleophilic metal casing or(B) a layer comprising particles each containing an oleophilic metal core and a hydrophilic metal casing.
    Type: Grant
    Filed: October 7, 1976
    Date of Patent: July 4, 1978
    Assignee: Hoechst Aktiengesellschaft
    Inventor: Joachim Stroszynski
  • Patent number: 4097283
    Abstract: A water-soluble, photosensitive resin composition containing a water-soluble polymer having an ethylenic unsaturated bond in its side-chains, a water-soluble anthraquinone sulfonic acid or anthraquinone carboxylic acid sensitizer, or salts thereof, and if desired, a water-soluble azide compound.
    Type: Grant
    Filed: December 15, 1975
    Date of Patent: June 27, 1978
    Assignee: Fuji Chemicals Industrial Company Limited
    Inventors: Takateru Asano, Keiko Ito
  • Patent number: 4096294
    Abstract: A process for preparing a waterless printing master having a minimum background ink reflection density comprises coating a master substrate with an ink releasing block copolymer comprising elastomeric ink releasing siloxane blocks and isothermally crystallizable thermoplastic organic blocks. Thereafter, the thermoplastic blocks are isothermally crystallized and the siloxane blocks are preferably cross-linked. The printing master is imaged by depositing ink accepting particulate imaging material on the copolymer coating and heating and cooling the thermoplastic blocks to bond the particulate imaging material thereto.
    Type: Grant
    Filed: April 4, 1977
    Date of Patent: June 20, 1978
    Assignee: Xerox Corporation
    Inventor: Thomas J. Pacansky
  • Patent number: 4093465
    Abstract: Compositions comprising (I) solvent-soluble, negative-acting, light-sensitive reaction products of (a) water-soluble diazo condensation products with (b) water-insolubilizing inorganic compounds therefor and (II) synthetic, film-forming oleophilic resins, which compositions can be coated onto suitable base sheet materials to form presensitized lithographic printing plates, proofs for multi-color printing, visual aids, printed circuits and the like.
    Type: Grant
    Filed: March 12, 1975
    Date of Patent: June 6, 1978
    Assignee: Polychrome Corporation
    Inventors: Simon L. Chu, Eugene Golda
  • Patent number: 4092925
    Abstract: A lithographic printing plate system utilizing a composite plate having an aluminum printing member that can be recycled. An aluminum printing member has a light-sensitive coating thereon which forms the image area of the plate together with the aluminum member itself. A carrier plate supports the aluminum member. The carrier plate and the aluminum member are preferably releasably adhered together outside the image area of the plate, that is, along transverse and/or longitudinal edge positions adjacent the image area. The aluminum member is readily separated from the carrier plate for recycling after the printing run and the carrier plate can be reused or recycled.
    Type: Grant
    Filed: August 5, 1976
    Date of Patent: June 6, 1978
    Inventor: Howard A. Fromson
  • Patent number: 4092172
    Abstract: A photocurable composition comprising a copolymer of maleic acid monoester with .alpha.-olefine compound, a vinylurethane compound obtained by urethanation reaction of a polyisocyanate compound with a photopolymerizable ethylenically unsaturated alcohol having a number average molecular weight of less than 3,000 or by urethanation reaction of 1 mole of diisocyanate compound with about 1 mole of the photopolymerizable ethylenically unsaturated alcohol and about 1/m mole of m-valent alcohol (wherein m is an integer of 2 to 6) having a number average molecular weight of less than 3,000, and a photosensitizer.
    Type: Grant
    Filed: January 2, 1976
    Date of Patent: May 30, 1978
    Assignee: Kansai Paint Co., Ltd.
    Inventor: Tetsuo Higuchi
  • Patent number: 4092170
    Abstract: A photocopying material is provided having a light-sensitive layer comprising an oleophilic resin and a resinous diazonium compound, which both are soluble in an organic solvent but substantially insoluble in water, in admixture with a surface active agent which, after imagewise exposure, renders the layer developable with plain water such as ordinary tap water so as to yield an excellent photocopy and in particular a printing form from which many thousands of fine prints can be made on an offset machine.
    Type: Grant
    Filed: February 17, 1976
    Date of Patent: May 30, 1978
    Assignee: Oce-van der Grinten N.V.
    Inventors: Antonius H. I. Houtermans, Johannes G. Kamphuis
  • Patent number: 4090880
    Abstract: A method for preparing aluminum based lithographic printing plates which comprises treating at least one surface of an aluminum base sheet with an interlayer composition, thereafter anodizing the thus treated aluminun surface, optionally retreating the coated, anodized aluminum plate with another stratum of the interlayer composition and then applying to said surface a suitable light sensitive composition to yield the desired photosensitive lithographic printing plate of improved characteristics.
    Type: Grant
    Filed: March 3, 1977
    Date of Patent: May 23, 1978
    Assignee: Polychrome Corporation
    Inventors: Simon Long Chu, Eugene Golda, Alan Leonard Wilkes
  • Patent number: 4086092
    Abstract: A method for preparing aluminum based lithographic printing plates which comprises coating at least one surface of an aluminum base sheet with a potassium zirconium fluoride solution, thereafter treating the coated, aluminum plate with a stratum of a sodium silicate solution and then applying to said surface a lithographically suitable light sensitive composition to yield the desired photosensitive lithographic printing plate of improved characteristics.
    Type: Grant
    Filed: April 18, 1977
    Date of Patent: April 25, 1978
    Assignee: Polychrome Corporation
    Inventors: Eugene Golda, Alan Leonard Wilkes
  • Patent number: 4082861
    Abstract: A continuous tone dry process imaging film includes a solid, high optical density and substantially opaque film of dispersion imaging material deposited on a substrate. Energy is applied to the film of dispersion imaging material, in an amount sufficient to increase the absorbed energy in the material above a certain critical value, to change the same to a substantially fluid state in which the surface tension of the material acts to cause the film, where subject to the applied energy, to disperse and change to a discontinuous film comprising openings and deformed material which are frozen in place following the application of said energy and through which openings light can pass.
    Type: Grant
    Filed: September 23, 1976
    Date of Patent: April 4, 1978
    Assignee: Energy Conversion Devices, Inc.
    Inventors: Masatsuga Izu, Stanford R. Ovshinsky
  • Patent number: 4082040
    Abstract: A lithographic printing plate comprising a support and a layer of aluminum nitride formed thereon, said layer of aluminum nitride having a thickness of from about 100 A to about 10,000 A.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: April 4, 1978
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Toshiro Yamashina, Hirokazu Sakaki
  • Patent number: 4081276
    Abstract: A method is described for forming an image or design on the surface of a substrate by treating the substrate with a photoinitiator, such as triphenylsulfonium hexafluoroantimonate. A mask can be placed on the treated substrate which is exposed to radiant energy, resulting in the formation of a cationic polymerization catalyst on the exposed substrate surface. The substrate can then be contacted with a cationically polymerizable organic material, such as an epoxy resin, resulting in the formation of an adherent organic film on the surface of the substrate which has been exposed.
    Type: Grant
    Filed: October 18, 1976
    Date of Patent: March 28, 1978
    Assignee: General Electric Company
    Inventor: James V. Crivello
  • Patent number: 4078927
    Abstract: A planographic printing master comprising an ink releasing photoconductive insulating layer and an ink receptive particulate image pattern.
    Type: Grant
    Filed: December 13, 1973
    Date of Patent: March 14, 1978
    Assignee: Xerox Corporation
    Inventors: Alan B. Amidon, Joseph Mammino
  • Patent number: 4077325
    Abstract: Improved waterless lithographic printing masters are provided having minimum background ink reflection density. The master comprises a crosslinked block copolymer containing elastomeric, ink releasing siloxane blocks chemically linked to organic image accepting thermoplastic blocks, said copolymer having a molecular weight for the organic blocks sufficient to provide strength and a background ink reflection density of less than 0.02 and preferably less than 0.01.
    Type: Grant
    Filed: March 10, 1977
    Date of Patent: March 7, 1978
    Assignee: Xerox Corporation
    Inventors: Thomas J. Pacansky, Alan B. Amidon
  • Patent number: 4076536
    Abstract: Copolymers of glycidyl acrylate and allyl glycidyl ether and terpolymers derived from addition of glycidyl methacrylate to the polymerizable mixture, having an inherent viscosity within the range of about 0.09 to 0.28 and an epoxy equivalent of at least about 0.64 per 100 g. of polymer are provided which upon admixture with a catalyst which is a radiation-sensitive aryldiazonium salt of a complex halogenide, provides compositions suitable for use in a dry photopolymer positive imaging process. In the process, the polymer which is non-tacky at room temperature, together with the catalyst is applied to a substrate and exposed to an energy source for example, electromagnetic radiation through a transparency or mask. Following exposure, the coating is heated to the softening point of the unexposed portion of the coating and a powder or toner is applied thereto, the toner being adhered to only the tacky, nonexposed area of the coating, resulting in a pigmented image.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: February 28, 1978
    Assignee: American Can Company
    Inventors: Sheldon Irwin Schlesinger, Ronald J. Boszak
  • Patent number: 4075015
    Abstract: A light sensitive mass which contains a film former, which consists of 20 to 90 percent by weight of a vinylpyrrolidone-vinyl acetate copolymer or a polyvinyl pyrrolidone or both and 10 to 80 percent by weight of an aryl sulfone amide formaldehyde resin, and at least one sensitizer, the weight ratio of said film former to sensitizer being between 1:1 and 10:1. Usually the light sensitive mass is used as a light sensitive reversal-development layer on a carrier.
    Type: Grant
    Filed: August 16, 1976
    Date of Patent: February 21, 1978
    Assignee: Swiss Aluminium Ltd.
    Inventors: Josef Vinkovic, Eugen Werner
  • Patent number: 4074009
    Abstract: A driographic plate capable of being direct imaged by pen, pencil, typewriter, toner powder, etc. comprising a substrate having a coating thereon, the coating comprising a continuous medium having a solid fluorinated compound containing at least one fluorinated aliphatic radical uniformly dispersed therethrough in a manner such that the coating surface is ink repellent when dry. On direct imaging, the imaged areas will readily accept ink and prints can be made therefrom without necessity of a press dampening system.
    Type: Grant
    Filed: December 8, 1975
    Date of Patent: February 14, 1978
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: James F. Sanders
  • Patent number: 4063507
    Abstract: A process for producing a planographic printing plate comprising subjecting a light-sensitive planographic printing plate member to a burning in wherein the light-sensitive planographic printing plate member is treated with a solution containing at least one compound selected from the group consisting of boric acid, or the metal salts or ammonium salt thereof, prior to the burning in.
    Type: Grant
    Filed: June 3, 1976
    Date of Patent: December 20, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Tadao Toyama, Masaru Watanabe, Harumasa Kitago
  • Patent number: 4062682
    Abstract: A method for the preparation of a planographic printing plate wherein a sheet material comprising an outer hardenable hydrophilic colloid layer on whose surface is concentrated a visible silver image that has been formed thereon from silver halide complexes according to the silver complex diffusion transfer process, is treated with an aqueous lithographic fixer having a pH in the range of 1.0 to 6.5 and containing1. an iron(III) salt of a polyaminopolycarboxylic acid as oxidizing agent for the silver image,2. a compound yielding in dissolved state iodide ions as precipitating agent for silver ions, and3. an organic onium compound.
    Type: Grant
    Filed: July 29, 1975
    Date of Patent: December 13, 1977
    Assignee: AGFA-GEVAERT N.V.
    Inventors: Urbain Leopold Laridon, Rene Alois Van Brandt, Albert Lucien Poot
  • Patent number: 4060656
    Abstract: A support for a photosensitive resin for use in making a printing plate using a liquid photosensitive resin, said support comprising a flexible self-supporting base plate and an adhesive layer formed thereon for applying a layer of the photosensitive resin, wherein said adhesive layer is a three-dimensional cured product containing 1 .times. 10.sup.-4 to 1 .times. 10.sup.-2 mol/gr. of the effectively photopolymerizable unsaturated carbon-to-carbon double bond, which has been formed from a composition consisting of (A) a compound containing at least two 1,2-epoxy groups in the molecule; (B) a compound selected from one of the group comprising (i) a compound containing an effectively photopolymerizable unsaturated carbon-to-carbon double bond and a 1,2-epoxy group in the molecule and having a boiling point of at least 120.degree. C.
    Type: Grant
    Filed: July 15, 1975
    Date of Patent: November 29, 1977
    Assignee: Teijin Limited
    Inventors: Kiyomi Naka, Teruo Takahashi
  • Patent number: 4058398
    Abstract: A recording material comprising a support, a layer of a light-sensitive composition on the support, and a transparent film on the layer of the light-sensitive composition wherein the light-sensitive composition comprises (a) a monomer containing at least two addition polymerizable unsaturated bonds and having a boiling point of at least 100.degree. C, (b) polyvinyl butyral, and (c) a photopolymerization initiator represented by the formula: ##STR1## wherein R.sub.1 is an alkyl group which may be substituted or a vinyl-methyl group, R.sub.2 is an alkyl group, aryl group, or thienyl group, and Z is a group of non-metallic atoms required for forming a heterocyclic ring.After the recording material is imagewise exposed to light, the transparent film is peeled off while heating at about 70.degree. to 150.degree. C, whereby a positive or negative image is formed on each of the support and transparent film.
    Type: Grant
    Filed: September 29, 1975
    Date of Patent: November 15, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Chiaki Osada, Eiichi Hasegawa, Masataka Murata
  • Patent number: 4054732
    Abstract: Copolymers of glycidyl acrylate and allyl glycidyl ether and terpolymers derived from addition of glycidyl methacrylate to the polymerizable mixture, having an inherent viscosity within the range of about 0.09 to 0.28 and an epoxy equivalent of at least about 0.64 per 100 g. of polymer are provided which upon admixture with a catalyst which is a radiation-sensitive aryldiazonium salt of a complex halogenide, provides compositions suitable for use in a dry photopolymer positive imaging process. In the process, the polymer which is non-tacky at room temperature, together with the catalyst is applied to a substrate and exposed to an energy source for example, electromagnetic radiation through a transparency or mask. Following exposure, the coating is heated to the softening point of the unexposed portion of the coating and a powder or toner is applied thereto, the toner being adhered to only the tacky, non-exposed area of the coating, resulting in a pigmented image.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: October 18, 1977
    Assignee: American Can Company
    Inventors: Sheldon Irwin Schlesinger, Ronald J. Boszak
  • Patent number: 4052217
    Abstract: A sheet material for bimetallic printing plate production comprises a base metal layer, a thin bimetallic layer comprising lithographically different metals, and a barrier layer between the base metal layer and the bimetallic layer. The barrier layer may be an anodic layer on the base metal layer or a film or sheet of suitable plastics material. The layers are laminated together and the barrier layer prevents corrosion by electrochemical action and by the decomposition products of the constituents of the adhesives used. Additionally, in the case where the barrier layer is of plastics material, the plate is resistant to fragmentation during printing. The sheet material may be produced in continuous lengths and results in printing plates which are relatively light in weight.
    Type: Grant
    Filed: May 11, 1976
    Date of Patent: October 4, 1977
    Assignee: Howson-Algraphy Limited
    Inventor: Leonard James Watkinson
  • Patent number: 4049453
    Abstract: A composite developer-etch composition for chromium-plated lithographic printing plates comprises an aqueous solution of aluminum chloride, a water-soluble chloride other than aluminum chloride, phosphoric acid, and an acid-stable water-soluble reducing agent; the composition having a particular specific gravity range.
    Type: Grant
    Filed: June 14, 1976
    Date of Patent: September 20, 1977
    Assignee: Printing Developments, Inc.
    Inventors: Vincent A. Pagliaro, Richard G. Walters
  • Patent number: 4049746
    Abstract: Compositions comprising the reaction product of a novel, highly branched polyalkylenimine-urea-aldehyde resin and a polyacrylic resin provide useful intermediate coatings when applied to preconditioned metal surfaces which may be subsequently coated with light sensitive materials to make photolithographic plates. The intermediate coating, particularly when applied to a grained or ungrained aluminum support member which has been anodized and finally coated with light sensitive materials produces a highly durable plate that possesses good storage characteristics and is capable of unusually extended press runs.
    Type: Grant
    Filed: August 22, 1975
    Date of Patent: September 20, 1977
    Assignee: The Richardson Company
    Inventors: Thaddeus M. Muzyczko, Ronald A. Frederiksen, David L. York
  • Patent number: 4046577
    Abstract: A photoreactive composition containing an effective amount of a polymer which includes as a recurring structure: ##STR1## wherein Ar is a bivalent aromatic radical, and M is selected from the class consisting of hydrogen, alkali metal, ammonium, and substituted ammonium. These compositions are useful in a wide variety of photochemical and photomechanical processes and are particularly suited for use as photopolymers, photoinitiators and photosensitizers in light sensitive coatings of presensitized lithographic plates.
    Type: Grant
    Filed: July 12, 1976
    Date of Patent: September 6, 1977
    Assignee: The Richardson Company
    Inventors: Thaddeus M. Muzyczko, Thomas H. Jones
  • Patent number: 4045222
    Abstract: In an etch-bleaching process wherein a hydrophilic layer in/on which a silver image exists is first treated with an etch-bleaching solution the improvement where the hydrophilic layer is subsequently treated with an aqueous solution containing at least one of an oxyacid of chlorine and a salt thereof.
    Type: Grant
    Filed: January 26, 1973
    Date of Patent: August 30, 1977
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Fumiaki Shinozaki, Tomoaki Ikeda, Masayoshi Tsuboi
  • Patent number: 4043815
    Abstract: In a method of making a printing plate for use in offset printing, a positive transparency of the design to be printed is first prepared in such a way that when the sensitive layer thereof is observed the design thereon is seen as right side out. This positive transparency is then mounted on a support provided with registration marks, with the sensitive layer of the transparency turned outwardly, and any errors in the transparency are corrected. The mounting is then used to contact-print a negative transparency on which the design is seen inside out when its sensitive layer is observed. Finally the design is formed on the printing plate employing the negative transparency, after any necessary re-touching of the latter.
    Type: Grant
    Filed: August 18, 1976
    Date of Patent: August 23, 1977
    Inventor: Stephane Klymus
  • Patent number: 4043811
    Abstract: A conversion solution for rendering hydrophilic the zinc oxide resin binder type planographic masters containing 2.0% potassium ferrocyanide, phosphoric acid to produce a pH in the range of 4.1 - 4.2 and a buffering salt of ammonium acid phosphate or sodium acid phosphate to buffer the solution and 4.0% by weight of triethanolamine as a modifying and solvating agent to raise the solubility threshold preventing formation of needle-like crystals that tend to form as water evaporates from the solution, and modify the physical property of crystals that do form to a less-hard structure.
    Type: Grant
    Filed: July 29, 1976
    Date of Patent: August 23, 1977
    Assignee: Addressograph Multigraph Corporation
    Inventor: Richard John Pratt
  • Patent number: 4042613
    Abstract: Novel benzophenone derivatives represented by the general formula R.sub.m.sup.1 --C.sub.6 H.sub.5-m --CO--C.sub.6 H.sub.5-n --R.sub.n.sup.2 where R.sup.1 is a halogen atom, a monovalent C.sub.1-10 hydrocarbon, alkoxy, thioalkoxy, amino, or dialkylamino group, R.sup.2 is an unsubstituted or organosiloxy-substituted organosilyl group, and m and n are each integers from 1 to 5. The benzophenone derivatives are useful as photosensitizers for making photo-curable compositions by blending with photo polymerizable resins, especially photopolymerizable organosilicon resins. Such photo-curable organosilicon resin compositions are further useful for making dry-planographic printing plates comprising non-image areas formed from the polymerized and cured layers of the composition.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: August 16, 1977
    Assignees: Dai Nippon Printing Co., Ltd., Shin-Etsu Chemical Co., Ltd.
    Inventors: Minoru Takamizawa, Yasushi Yamamoto, Yoshio Inoue, Atsumi Noshiro, Hitoshi Fujii
  • Patent number: 4037533
    Abstract: Method for substantially improving the shadow detail and color spectrum range of multicolored lithographic reproductions including the preparation of and printing with standard halftone printing plates and overprinting with a secondary printing plate made from a color separation used in making the halftone printing plates; the secondary printing plate being made from a secondary image exposed through a random pattern screen.
    Type: Grant
    Filed: June 2, 1976
    Date of Patent: July 26, 1977
    Assignee: Rapoport Printing Corporation
    Inventors: Sidney L. Rapoport, Douglas F. Mitchell
  • Patent number: 4038077
    Abstract: This application relates to procedures wherein a photographic image in silver prepared by diffusion transfer is treated in such a manner as to provide a printing plate or inking master useful in photomechanical reproduction or to provide a non-silver image of the original subject matter, e.g., a document or the like to be reproduced.
    Type: Grant
    Filed: March 10, 1976
    Date of Patent: July 26, 1977
    Assignee: Polaroid Corporation
    Inventor: Edwin H. Land
  • Patent number: 4038253
    Abstract: It has been found that certain polymers containing pendant diazo ester groups are photosensitive and have utility in the preparation of both lithographic and relief printing plates, as well as for etching resists for printed circuits. This is a continuation of application Ser. No. 412,218, filed Nov. 2, 1973 now abandoned.
    Type: Grant
    Filed: June 2, 1976
    Date of Patent: July 26, 1977
    Assignee: Hercules Incorporated
    Inventor: Brian D. Kramer
  • Patent number: 4030416
    Abstract: Improved waterless lithographic plates are provided. The master which comprises a copolymer of siloxane blocks crosslinked to an elastomeric ink releasing condition and organic thermoplastic blocks which are ink accepting is imaged with a particulate material, preferably an ink accepting thermoplastic polymer, and the thermoplastic blocks heated and cooled to bond the particulate imaging material thereto.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: June 21, 1977
    Assignee: Xerox Corporation
    Inventor: Richard L. Schank
  • Patent number: 4028107
    Abstract: Process and apparatus for printing a plurality of imposed pages in which proofs of said pages are manufactured, the proofs then being confined in co-planar, predetermined relation by engaging the sheets solely along selected edges thereof, and while holding the sheets thus confined manufacturing a printing plate or other reproductions therefrom. In one embodiment the proofs are on opaque or light impermeable sheets, while in a second embodiment they are on light permeable sheets. In the case of the opaque proofs used to make a printing plate, the plate is produced from a photo negative of the proof, whereas if the proofs are on light permeable material a plate may be produced directly by passing light through said proofs onto the sensitized surface of the plate material.
    Type: Grant
    Filed: May 19, 1971
    Date of Patent: June 7, 1977
    Inventor: John C. Henley, III
  • Patent number: 4022619
    Abstract: A composite developer-etch composition for chromium-plated lithographic printing plates comprises an aqueous solution of aluminum chloride, a water-soluble chloride other than aluminum chloride, phosphoric acid, and an acid-stable water-soluble reducing agent; the composition having a particular specific gravity range.
    Type: Grant
    Filed: April 14, 1975
    Date of Patent: May 10, 1977
    Assignee: Printing Developments, Inc.
    Inventors: Vincent A. Pagliaro, Richard G. Walters
  • Patent number: 4020762
    Abstract: A planographic printing plate which is imaged by means of a laser beam in combination with overall exposure to ultraviolet light and developed by means which are conventional in lithographic art.
    Type: Grant
    Filed: October 14, 1975
    Date of Patent: May 3, 1977
    Assignee: Scott Paper Company
    Inventor: John O. H. Peterson
  • Patent number: 4021592
    Abstract: An article having an aluminum substrate, an unsealed, porous anodic oxide layer thereon and electrolytically deposited, randomly distributed discrete metal islands having a root portion anchored in one or more pores of the oxide layer. The metal islands extend from the root portion above the surface of the oxide layer in a bulbous, undercut configuration.A process for treating aluminum is also disclosed and includes the steps of electrolytically anodizing aluminum surfaced articles to form an unsealed, porous anodic oxide layer thereon followed by electrolytically depositing randomly distributed discrete metal islands in the pores of the oxide layer and extending above the surface thereof in the bulbous, undercut configuration.
    Type: Grant
    Filed: October 15, 1975
    Date of Patent: May 3, 1977
    Inventor: Howard A. Fromson
  • Patent number: 4019904
    Abstract: The planographic printing plate has ink-receptive and ink-repellent areas provided on its base, the ink-repellent areas being covered with a layer formed by polymerizing and curing a composition which comprise a photopolymerizable organopolysiloxane with maleimido groups. The photopolymerizable organopolysiloxane has easily synthesized. The ink-repellency of the cured organopolysiloxane is excellent. The planographic printing plates can be used without dampening water and have a superior press life.
    Type: Grant
    Filed: March 30, 1976
    Date of Patent: April 26, 1977
    Assignees: Dai Nippon Printing Company Limited, Shin-Etsu Chemical Company Limited
    Inventors: Atsumi Noshiro, Minoru Takamizawa, Yasushi Yamamoto, Yoshio Inoue, Hitoshi Fujii
  • Patent number: 4019907
    Abstract: A photosensitive color-forming element comprises a support and a photosensitive color-forming layer formed on said support and containing therein at least one photosensitive color-forming azido compound of the formula ##STR1## wherein [A] is a benzene ring or naphthalene ring, R.sub.1 and R.sub.2 each is a hydrogen or halogen atom or alkyl, alkoxyl, dialkylamino, acyl, acylamino, nitro or hydroxyl radical, and R.sub.3 is a hydrogen or halogen atom, or alkyl, alkoxyl, nitro, carboxyl, alkylcarboxyl, dialkylcarbamoyl, sulfonic acid, dialkylaminosulfonyl, alkylsulfonyl or acyl radical or a group of the formula (II), (III), (IV) or (V): ##STR2## in which formula X is an --O-- bonding or --NH-- bonding.[B] is a benzene ring or naphthalene ring, and R.sub.4 and R.sub.
    Type: Grant
    Filed: October 17, 1974
    Date of Patent: April 26, 1977
    Assignees: Hodogaya Chemical Co., Ltd., Oji Paper Co., Ltd.
    Inventors: Takahiro Tsunoda, Minoru Ozutsumi, Shigeo Maeda, Susumu Suzuka, Hidetoshi Komiya, Hideaki Shinohara
  • Patent number: 4018605
    Abstract: A hydrophilic-surfaced metallic foil capable of providing a lithographic printing plate upon imaging by the silver salt diffusion transfer process, the foil being treated with an aqueous solution of a water soluble Group IV-B hexavalent metal fluoride compound prior to imaging, and the lithographic plate so produced.
    Type: Grant
    Filed: April 21, 1975
    Date of Patent: April 19, 1977
    Assignee: Minnesota Mining and Manufacturing Company
    Inventor: David B. Olsen
  • Patent number: 4016814
    Abstract: A novel printing master and method for producing the same is disclosed which comprises the coating of a suitable substrate with an uncured silicone gum composition containing an activating proportion of a "blowing" or "foaming" agent. A particulate image pattern such as a toner image pattern, is transferred to the uncured silicone layer, followed by curing of the gum to an elastomeric ink releasable film. Activation of the "blowing" agent occurs during curing of the silicone to cause imagewise "foaming" of the silicone layer. After removal of the deposited image pattern, a "foamed" image is formed which is ink receptive and provides an imaged printing master suitable for use without a need for aqueous dampening solutions to provide ink release in non-imaged areas of the master.
    Type: Grant
    Filed: April 13, 1973
    Date of Patent: April 12, 1977
    Assignee: Xerox Corporation
    Inventors: Richard L. Schank, Richard G. Crystal
  • Patent number: 4015986
    Abstract: Baked novolak resin based positive photoresists are either developed after exposure or stripped, following the use of the pattern resist layer as an etch mask, in aqueous solutions of a combination of permanganate and phosphoric acid.
    Type: Grant
    Filed: August 22, 1975
    Date of Patent: April 5, 1977
    Assignee: International Business Machines Corporation
    Inventors: Gabor Paal, Jurgen F. Wustenhagen
  • Patent number: 4012254
    Abstract: Photoconductive waterless lithographic printing masters are provided having particle-to-particle contact of photoconductive material by placing a heterogeneous copolymer having an abhesive species and an imaging material adhesive species, in a solvent in which at least one of said species can be preferentially dissolved, preferentially dissolving one of said species and forming a suspension of photoconductive material in said soluble species, and coating the suspension on a suitable master substrate, allowing the solvent to evaporate, imaging the material with an ink accepting particulate imaging material in image configuration, and fusing the particulate imaging material to the coated master substrate while preferably effecting a phase inversion between the two species of the heterogeneous copolymer.
    Type: Grant
    Filed: April 28, 1975
    Date of Patent: March 15, 1977
    Assignee: Xerox Corporation
    Inventor: Richard G. Crystal
  • Patent number: 4009033
    Abstract: A positive photoresist having increased sensitivity to light and formed by the addition of an acidic compound to a 1,2-quinone-diazide sulphonic acid ester sensitizer.
    Type: Grant
    Filed: September 22, 1975
    Date of Patent: February 22, 1977
    Assignee: International Business Machines Corporation
    Inventors: Peter Bakos, John Rasile