Abstract: In an image forming apparatus in which a plurality of flash lamps mounted at approximately symmetrical positions are alternately lit for exposure of an original to obtain a copied image on a light sensitive film, distribution of exposures effected by the lamps disposed at the positions is made asymmetrical such that the total amount of exposure at a portion of the original undergone the most intensive exposure by the lamp lit first is minimum, while the total amount of exposure at a portion of the original undergone the least intensive exposure by the lamp lit first is maximum.

Abstract: An overhead projector comprises, a main body, a light source disposed in the main body for emitting a light, a Fresnel lens disposed on an upper surface of the main body, an internal mirror for reflecting the emitted light toward the Fresnel lens, disposed rotatably in the main body such that a portion of the internal mirror is protruded from a bottom of the main body to an outside of the main body upon a use of the projector and is accommodated in the main body upon a non-use of the projector, an arm connected with the main body at one longitudinal end thereof, a projection lens held by the other longitudinal end of the arm for focusing the reflected light which has passed through the Fresnel lens and an original for a projection placed on the Fresnel lens, and a projection mirror for directing the focused light from the projection lens toward a screen.

Abstract: For obtaining a required amount of exposure on a light sensitive film in an image forming apparatus in which a plurality of flash lamps disposed in opposition to the original are lit for exposure of the original to form a copied image on a light sensitive film, the individual flash lamps are alternately lit a plurality of times, respectively, even when the requisite quantity of light can be obtained by lighting alternately only once each of the flash lamps, to thereby prevent nonuniformity of exposure of the film due to the reciprocity law failure.

Abstract: A copier for providing photographic copies of different sized originals, having an optical system variable for altering the magnification of an original, a scale member movable to locate the end of each respective size of original on the copier, and a link mechanism intercoupling the optical system and the scale to automatically vary the system magnification in accordance with the location of the scale.

Abstract: Disclosed is a metallizing composition comprising an oxynitride glass of the Mg-Al-Si system and/or the Y-Al-Si system and a powder of a high-melting-point metal. This composition has a good affinity with a nitride ceramic material and a carbide ceramic material and is useful for forming metallized layers on substrates of these ceramic materials.

Abstract: A copier capable of binding copy papers at their center or their edge as desired. A bookbinding device is operatively connected to a paper outlet of the copier. To bind the papers at their center, a folding mechanism of the bookbinding device is activated first in order to form a crease along the center of each copy paper. Then, a binding mechanism of the bookbinding device is activated to sequentially stack the papers in an upwardly convex form and such that the creases face upward in alignment and, then, stitch the papers together along the aligned creases by means of a staple or the like. The bound papers are discharged to a stacking mechanism of the bookbinding device in a developed position so as to be stacked there while being folded double in the creases. When it is desired to duplicate documents on papers which are equal to or double the size of the documents and bind the copies at the center, a positional relationship between the documents and the papers is set up by a unique method.

Abstract: A copier capable of binding copy papers at their center or their edge as desired. A bookbinding device is operatively connected to a paper outlet of the copier. To bind the papers at their center, a folding mechanism of the bookbinding device is activated first in order to form a crease along the center of each copy paper. Then, a binding mechanism of the bookbinding device is activated to sequentially stack the papers in an upwardly convex form and such that the creases face upward in alignment and, then, stich the papers together along the aligned creases by means of a stapler or the like. The bound papers are discharged to a stacking mechanism of the bookbinding device in a developed position so as to be stacked there while being folded double in the creases.

Abstract: A method for melting and treating waste to be treated such as waste water treatment sludge and incinerated ash of garbage involves mixing the waste to be treated with an auxiliary fuel in powder, granular or solid form or in the form of mixture thereof which has its own calorie value. Powder coal, coal, coke, waste plastic material, saw-dust, waste paper, carbonized material and used tires can be used as an auxiliary fuel. In addition to the auxiliary fuel, an additive is admixed for adjusting the composition of the waste to have treated so as to be a specific composition ratio.

Abstract: In a discharge lamp comprising a sintered electrode comprising a high temperature melting metal such as tungsten, molybdenum, tantalum or mixtures thereof as a main ingredient of the sintered electrode and an electron emissive material of an alkaline earth metal or compound thereof, the sintered electrode further comprising at least one oxide of a metal selected from the group consisting of yttrium, zirconium and aluminum.

Abstract: The antibacterial compound S551-II (Reductiomycin) is produced by culturing a microorganism belonging to the genus Streptomyces.S551-II-A is prepared by sublimation of the compound S551-II.

Abstract: A rare earth silicate phosphor co-activated by cerium and terbium which is expressed by the general structural formula:Ln.sub.2(1-x-y) O.sub.3.zSiO.sub.2 :Ce.sub.2x.Tb.sub.2ywhere:Ln is at least one rare earth element selected from the group consisting of yttrium, lanthanum, gadolinium and lutetium,x is 1.times.10.sup.-3 to 3.times.10.sup.-1 gram atom per gram atom of all the rare earth elements,y is 3.times.10.sup.-2 to 3.times.10.sup.-1 gram atom per gram atom of all the rare earth elements,z is 0.8 to 2.2 mol per mol of rare earth oxide,and the phosphor efficiently emits green rays when excited by ultraviolet rays.

Abstract: The antibacterial compound S551-II (Reductiomycin) is produced by culturing a microorganism belonging to the genus Streptomyces.S551-II-A is prepared by sublimation of the compound S551-II.

Abstract: Selenium is recovered from combustion waste gas, especially the combustion waste gas evolved from glass melting furnaces by a process in which the waste gas is contacted with an absorbing solution containing an alkali metal sulfite or bisulfite, whereby metallic selenium and selenium compounds are absorbed, the temperature of the waste gas is decreased and the humidity of the waste gas is increased. The treated waste gas in then passed through a moist glass fiber filter which collects the remaining amounts of selenium from the waste gas. The absorbing solution is combined with the solution used to wash the glass fiber filter and the combined solutions are treated with an acid which reduces all of the selenium present in the solution to metallic selenium which precipitates from solution.

Abstract: A process is described for the removal of oxides of sulfur, dust and mist from a combustion waste gas such as the waste gas evolved from a glass melting furnace in which the waste gas is contacted with an absorbing solution containing an alkaline absorbent such as NaOH, Na.sub.2 CO.sub.3 or Na.sub.2 SO.sub.3, whereby the oxides of sulfur are absorbed and the temperature of the waste gas is decreased and the humidity of the waste gas in increased. The treated waste gas is then passed through a glass fiber filter which is maintained under moist conditions in order to efficiently remove dust and mist particles from the waste gas. Crystalline sodium sulfate hydrate is recovered from the absorbing solution contacted with the waste gas.