Abstract: Photoresist compositions suitable for deep UV and excimer laser lithography are disclosed that are mixtures of a photoacid and a polymer having imide residues to which acid labile groups are attached.The imide group ##STR1## can be blocked with certain groups, X, to form compounds containing the structure ##STR2## which have solubility properties different from the unblocked imide. These groups, X, can be cleaved by acid under the proper conditions to regenerate the unblocked imide. Where the imide group is incorporated in a polymer, the polymer with blocked imide groups can be made to function as a resist when compounded with a substance capable of forming an acid upon exposure to radiation.Preferred polymers are those in which at least 80% of the imide groups are blocked. When less than 50% of the imide groups are blocked, performance in a photoresist becomes unacceptable.

Abstract: The invention provides a cleaner for lithographic printing plates free of aromatic hydrocarbons consisting essentially of from about 3.0% to about 35.0% of a solvent component which is selected from the group consisting of ethoxylates and propoxylates of C.sub.1 to C.sub.4 alcohols; and from about 0.5% to about 7.0% sodium metasilicate; and from about 0.25% to about 6.0% of a non-ionic surfactant selected from the group consisting of polyoxy aryl ethers having a hydrophile-lipophile balance in the range of from about 10.5 to about 11.5; and from about 52.0% to about 96.25% water, wherein said percentages are by weight of the cleaner.

Abstract: The invention provides a method for producing a photographic element which comprises coating a substrate with a positive working photosensitive composition which composition comprises an aqueous alkali soluble resin, a quinone diazide photosensitizer and a solvent composition, heat treating said coated substrate at a temperature of from about 20.degree. C. to about 100.degree. C. until substantially all of said solvent composition is removed; imagewise exposing said photosensitive composition to actinic radiation; baking said coated substrate at a temperature of from about 120.degree. C. to about 160.degree. C. for from about 15 seconds to about 90 seconds; and removing the exposed non-image areas of said composition with a suitable developer.

Abstract: A hot melt adhesive composition which is especially useful for bonding polyamide article to surfaces, particularly polyamide surfaces. The composition contains an ethylene-vinyl ester copolymer or a polyamide polymer, and additionally contains a poly(p-hydroxystyrene) homopolymer or a copolymer of poly(p-hydroxystyrene) with a C.sub.1 to C.sub.4 alkyl acrylate.

Abstract: A composition for finishing, preserving and cleaning lithographic printing plates composed of a polyol having a molecular weight in the range of from about 50 to about 2,000; a maltodextrin obtained by the enzyme hydrolysis of corn or potato starch, a mixture of a C.sub.18 to C.sub.30 alcohol and an aminated, aliphatic C.sub.8 to C.sub.24 alcohol sulfate with a ratio of alcohol to sulfate ranging from about 1:1 to about 5:1; and a composition of hydrocarbons having a boiling point in the range of from about 175.degree. F. to about 500.degree. F., and a flash point of above about 100.degree. F., preferably containing 100% aliphatic components; and a substituted phenoxypoly(oxyethylene)ethanol having a hydrophile/lipophile balance of from about 8 to about 15; and a mono-, di- or tri-ethanolamine; and water; and an acid to impart a pH to the composition of from about 2.5 to about 6.5; and a buffer to maintain the pH, and preferably a bacteriostat/fungistat component.

Abstract: A coating composition which is a uniformly dispersed admixture ofA. a fluid carrier; andB. a homopolymer or copolymer containing monomer units of the formula ##STR1## wherein R.sub.1 and R.sub.2 are preferably hydroxyalkyl and the polymer has a preferred average molecular weight in the range of from about 5,000 to about 30,000; andC. a poly(epoxide).

Abstract: A developing and finishing composition for lithographic printing plates containing:a. a mono-, di-, or tri-sodium, potassium or lithium phosphate; andb. benzyl alcohol, phenoxyethanol or phenoxypropanol; andc. polyvinyl pyrrolidone, dextrin, poly (methyl vinyl ether/maleic acid) or gum arabic; andd. citric acid or benzoic acid; ande. sodium or potassium octyl sulfate; andf. sodium, potassium or lithium benzoate; andg. sodium, potassium or ammonium citrate; andh. sodium, potassium or ammonium sorbate; andi. sufficient water to formulate an effective developer.

Abstract: A coating composition which is a uniformly dispersed admixture ofA. a fluid carrier; andB. a homopolymer or copolymer containing monomer units of the formula ##STR1## wherein R.sub.1 and R.sub.2 are preferably hydroxyalkyl and the polymer has a preferred average molecular weight in the range of from about 5,000 to about 30,000; andC. a blocked polyisocyanate.

Abstract: A leg-propulsion assistance device for improving the individual field of a mobility of a human being. The device provides a saddle supplied with a hip fastening device. A saddle joint allows for the swiveling movement of two telescopic rods, the extension force of which is derived from a compressed spring or fluid generated under pressure, by a motor-compressor set. A link arm transmits the movement to a fixed joint in front of the user's shoe. A joint which becomes freed automatically at the end of each propulsive stride allows the link arm and foot to be raised. An automatic piloting system synchronizes the motive force with the muscular extension force of the leg and foot. The invention relates to all applications necessitating propulsion by the legs of an individual capable or not capable of exerting an intense muscular effort.

Abstract: This invention relates to a radiation polymerizable composition for use in a photographic element such as a lithographic printing plate comprising in admixturea) a polymeric binder;b) a photoinitiator;c) a diazonium salt; andd) a photopolymerizable mixture ofi) a polyfunctional acrylic monomer having from 3 to 6 unsaturated groups; andii) a monofunctional acrylic monomer having 1 unsaturated group.

Abstract: An improved overlay proofing film comprising a substantially transparent polyester base film which is first coated on one or both sides with a non-light sensitive composition having a refractive index of about 1.6, said non-light sensitive composition consisting essentially of a copolymer of polymethyl methacrylate and methacrylic acid.

Abstract: A photosensitive article which comprises a substrate, a first light sensitive layer on the substrate, a polysulfone layer and a second light sensitive layer. The first light sensitive layer preferably comprises a depolymerizable polymethyl methacrylate polymer and the second light sensitive layer preferably comprises on o-quinone diazide in admixture with a water insoluble, aqueous alkaline soluble binder resin.

Abstract: This invention relates to a composition for use in a screen printing screen.

Abstract: A developer composition for heavy duty printing plates which comprises in admixture:(a) propylene glycol monomethyl ether or dipropylene glycol monomethyl ether; and(b) benzyl alcohol and/or phenoxyethanol; and(c) ethylene carbonate and/or propylene carbonate; and(d) ethylene glycol diacetate; and(e) sodium benzoate and/or lithium benzoate; and(f) benzoic acid and/or citric acid; and(g) ethylene glycol, propylene glycol and/or glycerin; and(h) sufficient water to formulate an effective developer;wherein the percentages are based on the weight of the developer composition.

Abstract: A leadframe carrier and insert compatible with a temperature-affectable, expandable and contractable leadframe strip to be bonded with a selected plurality of semiconductor chips, said carrier being automatically separable and removable with regard to said insert during manufacture despite possible clinging which may be induced by the expansion and contraction of said carrier insert.

Abstract: This invention relates to negative photosensitized sheet constructions which, upon exposure to an actinic radiation source through a screened image, can accurately reproduce said image. The construction is useful as a color proofing film which can be employed to predict the image quality from a lithographic printing process.

Abstract: The invention provides a composition which comprises from about 3 to about 50% by weight of a hexa-alkyl disilazane and a solvent composition which comprises one or more compounds selected from the group consisting of a propylene glycol alkyl ether and a propylene glycol alkyl ether acetate.

Abstract: A wash water reclamation system for a printing plate processor having an external reservoir, wash water pumping and collecting means and means for continuously measuring wash water pH and conductivity. Conductivity and pH are automatically adjusted at pre-determined levels.

Abstract: The invention provides a method for developing negative working photographic elements using an aqueous developer comprising(a) a solvent composition consisting essentially of(i) n-propanol or isopropanol; and(ii) a glycol ether or acetate(b) a salt which is preferably magnesium sulfate; and(c) an ethoxylated alkyl phenol type non-ionic surfactant.