Abstract: A photosensitive printing plate forming material having on its surface a matting layer composed of a resin and a fine particulate material dispersed therein, said resin being at least one member selected from rosin and rosin esters.

Abstract: A lining apparatus of this invention is characterized by having a TV camera at a desired portion of a spray pipe and a monitoring device which is located outside of a furnace. The TV camera has a visual range directed toward the same direction as that of the spray nozzle. Due to the above construction, a clear image of an eroded portion of the furnace lining can be continuously observed by the monitoring device throughout the spraying operation. Accordingly, an operator can conduct a considerably accurate and safe lining operation.

Abstract: Acrylonitrile can be catalytically produced with a high yield by bringing, at an elevated temperature, preferably of 300.degree. to 470.degree. C., a reaction feed containing propylene, ammonia and molecular oxygen into contact with a catalyst consisting of an oxide composition of the empirical formula: Mo.sub.a Co.sub.b Fe.sub.c X.sub.d O.sub.e wherein X denotes at least one atom of an element selected from phosphorus, arsenic, antimony and bismuth and wherein the ratio a:b:c:d:e is in a range of 12:4 to 9:1 to 5:0.01 to 0.07:39.5 to 52.7, said catalyst being prepared by providing an aqueous mixture containing molybdenum-, cobalt- and iron-containing compounds and a phosphorus-, arsenic-, antimony- or bismuth-containing compound, converting the aqueous mixture into a dried solid mixture and calcining the solid mixture at a temperature of at least 550.degree. C.

Abstract: A pressure fixing apparatus in which copying paper with unfixed toner images formed on one surface is passed between a pair of press rollers in pressing contact with each other to fix the toner images to the copying paper with the pressure of the rollers. At least one of the rollers which comes into contact with the toner images on the copying paper has a roughened surface formed of minute round-edged projections.

Abstract: An oxygen concentration detector comprises an oxygen concentration sensor made of an oxygen ion conductive metal oxide which produces an electromotive force in accordance with a difference between an oxygen concentration in gas components of a gas under test and an oxygen concentration in a reference gas, an electrode formed on a surface of the oxygen concentration sensor which is to be exposed to the gas under test and an electrode formed on a surface of the oxygen concentration sensor which is to be exposed to the reference gas so that the electromotive force produced by the oxygen concentration sensor is taken across the electrodes, a first porous coating of a refractory metal oxide formed on the surface of the electrode which is to be exposed to the gas under test, said first coating having a number of pores through which the gas under test can pass, and a second porous coating of a refractory metal oxide formed on the surface of the first coating, said second coating having a number of pores which are la

Abstract: High-yield catalytic production of acrylonitrile at an elevated temperature, from a reaction mixture containing propylene, ammonia and molecular oxygen, utilizing a catalyst comprising an oxide composition having the empirical formula Mo.sub.a Co.sub.b Fe.sub.c X.sub.d O.sub.e wherein X denotes at least one atom of an element selected from among calcium, tungsten, chromium, zirconium, titanium, zinc, manganese, and tin and the atomic ratio a:b:c:d:e is in the range of 12:4 to 10:1 to 6:0 to 1.0:40 to 70, said catalyst being prepared by providing an aqueous mixture containing compounds of the elements, drying the aqueous mixture, and calcining the dried solid product at a temperature of at least 500.degree. C.

Abstract: Acrylonitrile can be produced in a high yield by the catalytical ammoxidation of propylene at an elevated temperature, preferably of 330.degree. to 470.degree. C, in the presence of a new type of catalyst consisting of an oxide composition of the empirical formula: Mo.sub.a Co.sub.b Fe.sub.c Bi.sub.d X.sub.e O.sub.f wherein X denotes at least one atom of an element selected from vanadium and tellurium and wherein the ratio a:b:c:d:e:f is in a range of 10:3 to 10:1 to 7:0.1 to 0.7:0.01 to 1:34.6 to 54.1, said catalyst being prepared by providing an aqueous mixture containing molybdenum-, cobalt- and iron-containing compounds, bismuth-containing compound, and vanadium-or tellurium-containing compound, converting the aqueous mixture into a dried solid mixture and calcining the solid mixture at a temperature of at least 500.degree. C.

Abstract: Propylene or isobutylene is catalytically oxidized into the corresponding nitrile with improved conversions and yields. The catalyst consists essentially of the metals; (A) Mo, (B) Bi, (C) Co, (D) Fe and (E) Zr in the predetermined atomic ratios.

Abstract: A resistor built-in spark plug comprising an insulator formed therein with an axially extending bore, a terminal nut fitted in an upper end portion of the bore, a center electrode fitted in a lower end portion of the bore, a resistor arranged in a central portion of the bore, one copper-glass electrode interposed between the resistor and the terminal nut, and another copper-glass electrode interposed between the resistor and the center electrode, such resistor being made by firing (calcining) and solidifying a resistor powder mixture consisting of 30 to 10 volume % of a principal resistor component containing tin oxide, 35 to 85 volume % of insulating ceramic filler powder of a higher electric resistivity than the principal resistor component which is selected from the group consisting of quartz glass, alumina, zircon, zirconia, silica (SiO.sub.2) and .beta.-spodumene, and 35 to 5 volume % of glass powder having a softening temperature in a range between 300.degree. and 600.degree. C.

Abstract: A resistor built-in spark plug comprises an insulator formed with an axially extending inner hole, a stem fitted in the upper part of said hole in said insulator, a center electrode fitted in the lower part of said hole, a resistor disposed in the central part of said hole, and copper-glass electrode layers disposed between said resistor and said stem and between said resistor and said center electrode. Said resistor is made by firing and solidifying powder of resistor mixture consisting of 75 to 38 volume percent of main resistor component containing tin oxide and 25 to 62 volume percent of glass powder with softening temperature of 300.degree. to 600.degree.C. Said copper-glass electrode layers are made by firing and solidifying a mixture of copper powder and glass powder with the softening temperature of above 530.degree.C and more than 30.degree.C higher than the softening point of glass in the resistor portion.