Abstract: A method for the production of aluminum substrates useful in the production of lithographic printing plates which comprises mechanically graining the surface of an aluminum sheet, subsequently finely graining the mechanically grained sheet in a saturated solution of an aluminum salt of a mineral acid to which up to 10% of a mineral acid has been added, with discretional electrolysis, and then optionally anodizing the sheet.

Abstract: A new resilient compressible printing element having a rubber layer with foamed closed cells therein. The closed cells are formed by the use of blowing agents which are activated and foam the material while an external pressure is applied to the material to restrict expansion.

Abstract: During manufacture, a rubber or other elastic sheet is forcibly stretched out and smoothly affixed to an adhesive spread out on a backing of cardboard or similar material. The sheet is suitable for receiving typing from a typewriter, and the entire assembly is suitable for insertion and bending over the roll of a common typewriter. During operation, a person types a message on the sheet, removes the assembly from the typewriter and forcibly peels the sheet off the backing. The sheet returns to its original unstretched shape, and the typed words, along with the spaces between the words, occupy less space than those of a similar message typed on ordinary paper. When used with a Xerox or similar copying machine, the reduction in the size of the words and spaces permits the use of many more words per final, normal size page of reproduced document.

Abstract: Relieved pattern of a resin original pattern plate, which does not exhibit fluidity at transferring temperature and possesses elastic modulus no smaller than 10 kg/cm.sup.2, preferably no smaller than 100 kg/cm.sup.2, is transferred onto thermoplastic resin material having fluidity at the transferring temperature (ASTM D1238, load 21.6 kg) of at least 0.01 dg/min, preferably at least 0.1 dg/min, by pressing the thermoplastic resin material to the original pattern plate under a pressure condition where elastic deformation of the original pattern plate is kept within 10%. The resin original pattern plate is prepared by controlling the photo-polymerizable resin composition to adjust its crosslink-ability and then photo-polymerizing, whereby the resulting resin original pattern plate possesses an elastic modulus of 10 kg/cm.sup.2 or higher at transferring temperature.

Abstract: A pressure sensitive member comprises a base sheet and an opaque pressure clarifiable layer overlying the substrate and the color of the substrate being different from that of the opaque clarifiable layer.

Abstract: A method for the production of aluminum substrates useful in the production of lithographic printing plates which comprises mechanically graining the surface of an aluminum sheet, subsequently finely graining the mechanically grained sheet in a saturated solution of an aluminum salt of a mineral acid to which up to 10% of a mineral acid has been added, with discretional electrolysis, and then optionally anodizing the sheet.

Abstract: An engraving board for printing a design with coloring media comprising, a first or thick paper layer with a second or thinner paper layer overlaying the thick paper layer and secured thereto. A printing layer comprising a multiplicity of densely packed short fibers overlays the thin paper layer and is secured thereto. The three layers can be secured to each other by means of water resistant adhesive and both the thinner and thick paper layers can comprise water absorbent material so that when a design is impressed upon the printing layer, exposing a portion of the thin paper layer, the coloring medium which is applied over the engraving board is absorbed into a thinner paper layer leaving the coloring medium on the remaining printing layer only to be used in printing the design.

Abstract: A shapeable matrix is provided for use in making of graphic art reproductions and in particular as a mold in forming of printing plates and other marking items.

Abstract: A method of making a plate cylinder for a web printing press in which a hollow cylinder with a conical interior is formed of ductile steel. Two nickel printing plates are formed to shape so that they will fit virtually exactly around the cylinder without joins between them being readily apparent. A cylindrical mould having two semi-cylindrical mould halves is formed with its inner diameter equal to the outer diameter of the plate cylinder being produced. One mould half is placed with its semi-cylindrical inner surface facing upwards and a printing plate is placed inside. Then the hollow cylinder coated with epoxy resin is placed on this plate, and the other printing plate is placed on the cylinder. The second mould half is secured to the first half, and a conical core is forced into the cylinder to expand it radially so that the plates are held under pressure against the mould surface. Then the mould is heated and the resin allowed to set under conditions of temperature and pressure.

Abstract: A method for the production of aluminum substrates useful in the production of lithographic printing plates which comprises graining the surface of an aluminum sheet in a saturated solution of an aluminum salt of a mineral acid to which up to 10% of a mineral acid has been added, with optional electrolysis.

Abstract: A base plate adapted to be coated with a light-sensitive diazo resin, and a lithographic plate which may be prepared therefrom. The base plate includes a substrate comprising a metal support and having a water-wettable, hydrophilic surface. Over the substrate and in direct contact with the surface is a layer comprising an oleophilic ink-receptive organic resin adapted to receive a light-sensitive coating comprising a diazo resin sensitizer. The oleophilic resin layer is permeable to the sensitizer so that it may penetrate substantially through the resin layer to establish sufficient contiguity between the diazo resin and the substrate so that both the light-sensitive coating and the organic resin layer become anchored to the substrate in the areas of exposure when the light-sensitive coating is exposed to light. Methods of preparing the base plate and lighographic plate are also disclosed.

Abstract: A shapeable matrix is provided for use in making of graphic art reproductions and in particular as a mold in forming of printing plates and other marking items.

Abstract: Rigid composite articles comprising a relatively thin, impression-retaining surface formed of a hard, rigid, room-temperature cured urethane resin and a relatively thick backing and reinforcing are made by casting a thin layer of urethane resin on the surface of a master, curing the urethane, then casting thereon a relatively thick backing layer of a casting material such as plaster or resin.

Abstract: This invention relates to a composition comprising a blend of a copolyester, a polyisocyanate and a compatible organic polymer, the ratio by weight of polyester to polymer being within the range of from about 20 : 1 to 0.5 : 1 by weight. The invention also relates to a laminate including the novel composition.

Abstract: A printing plate matrix is presented including mineral and/or organic fibers, thermosetting resin, and glass microbubbles uniformly dispersed throughout the material.

Abstract: Metal plates, e.g., of magnesium, zinc or copper, suitable for chemical milling and etching operations to produce photoengraving plates, printed circuit boards, nameplates, etc., comprising a metal layer and, adhered thereto, a plastic film layer having a thickness substantially smaller than that of the metal layer. The resulting composite laminates have proved outstandingly useful in permitting the employment of thinner metal layers, thus resulting in lighter weight and less expensive plates, yet retaining the required resistance to the chemical milling or etching process without impairment of mechanical stability and other desirable properties of the plate.

Abstract: A matrix board and the method of manufacture thereof are presented wherein the board has a relatively thin carrier sheet, a relatively thick layer of syntactic foam on the carrier sheet and a relatively thin layer of phenolic resin and filler over the relatively thick syntactic foam layer. The matrix board is capable of being molded at low pressures on the order of fifty psi, thus making it particularly suitable for use with rubber and photopolymer pattern or master plates and also making it particularly suitable for formation of deep relief matrix boards.

Abstract: A lithographic printing plate which comprises using in an ink-repellent layer a polymer of a monomer or a copolymer containing said monomer, said monomer being represented by the following general formulas: ##STR1## WHEREIN: R is hydrogen or a methyl radical; R' is hydrogen or an alkyl radical having 1 to 10 carbon atoms; Rf is a perfluoroalkyl radical having 3 to 21 carbon atoms; and n is an integer of 1 to 10.

Abstract: Rigid composite articles comprising a relatively thin, impression-retaining surface formed of a hard, rigid, room-temperature cured urethane resin and a relatively thick backing and reinforcing are made by casting a thin layer of urethane resin on the surface of a master, curing the urethane, then casting thereon a relatively thick backing layer of a casting material such as plaster or resin.

Abstract: A novel original plate for producing matrix which has improved strength, mold releasability and dimensional stability during production of matrices consists of a laminated structure of a metal base, a bonding layer, a relief supporting layer and a relief of a photo-polymerized resin, said relief supporting layer comprising a resin similar to that of the relief or having a high affinity with that of the relief.

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.

Abstract: A process for preparing a waterless lithographic printing master is provided. A suitable substrate, which is preferably ink accepting is first coated with a curable silicone which is curable at low or elevated temperature and a second different curable silicone deposited on said first silicone which can be preferentially cured at a lower temperature without curing the first silicone and which second silicone contains, in addition to its own catalyst, an amount of high temperature curing catalyst sufficient to cure the underlying silicone. The surface silicone is then preferentially cured at least on its surface to render it nontacky, but not the underlying silicone.

Abstract: An electrophotographic method comprises developing an electric latent image formed on a photosensitive member comprising a photoconductive material and containing a first color forming agent in a surface for forming a visible image with a charged toner particle containing a second color forming agent, and heating to cause a thermal color forming reaction therebetween resulting in formation of a colored fixed image on the photosensitive member.

Abstract: A planographic dry offset master plate composed of a substrate and, formed thereon, a crosslinking agent-cured layer of a diorganopolysiloxane in which 5 to 40 mole % of the organic groups directly bonded to silicon atoms are phenyl groups. The master plate is especially suitable for plate-making by an electrostatic process and a direct image process. The resulting printing plate has good durability and are free from scumming during printing.

Abstract: A process of making heat and dimensionally stable, consolidated, laminated, asbestos cored, textured unitary structures for use in making textured decorative laminates, and said structures per se, are disclosed.

Abstract: An impression sleeve for use in an impression packer comprising a smooth rolled sheet adapted to be connected on the outside of a packer to form an impression cover therefor, said sheet composed of about 60% to 80% by weight synthetic nitrile rubber, about 10% to 20% by weight natural rubber smoked sheet, about 5% to 15% by weight hydrated amorphous silica, and about 2% to 6% by weight of rubber processing oil.