Abstract: A neutron absorbent including a composite material is provided. The composite material is obtained by impregnating a carbon material with a boron oxide and/or a hydrate compound thereof, and baking such carbon material under pressure by inert gas at a temperature of not lower than 1500.degree. C.

Abstract: There is provided a method for producing a carbon material coated with carbon film comprising the steps of dissolving an aromatic polyamide imide resin in an organic solvent to obtain a solution, applying this solution to a carbon material or impregnating the carbon material with the solution, curing the material at 300 to 400%, and carbonizing and/or graphitizing the material by baking under non-oxidizing atmosphere. There is also provided a carbon material coated with an amorphous carbon film which is a product of thermal decomposition of aromatic polyamide imide.

Abstract: In a fuel cell power generation system for use with a fuel gas which is prepared by desulfurizing a raw fuel material such as naphtha, LPG, town gas, or the like and then, processing it by steam reforming reaction and thus, consists mainly of hydrogen or a process of producing the fuel gas, the desulfurization of the raw fuel material is implemented using a copper/zinc desulfurizing agent. As a result of the desulfurization, the raw fuel material is desulfurized at a higher level and the deterioration of a steam reforming catalyst employed is prevented. Accordingly, steady long-run operation of the fuel cell will be ensured. Also, upon the steam reforming reaction, the S/C (the mole number of steam per one mole of carbon in a raw fuel material) is reduced and thus, the concentration of hydrogen in the fuel gas will be increased providing an improvement in the efficiency of power generation.

Abstract: A facsimile apparatus includes a plurality of one-touch keys, a plurality of function keys, and a memory. The plurality of function keys are used to set predetermined functions. The memory holds a plurality of different functions which are set by the function keys with respect to each one-touch key.

Abstract: A novel process for desulfurizing and steam reforming sulfur-containing hydrocarbons is disclosed. The process comprises the steps of (a) desulfurizing the sulfur-containing hydrocarbon to a sulfur content of 5 ppb or less by use of a desulfurization agent, (b) reforming the desulfurized hydrocarbon at low temperature in an adiabatic reactor by use of steam, and (c) reforming the resultant gas reformed in the course of step (b) at high temperature in an external-heating reformer furnance.

Abstract: A magnetic recording and reproducing head unit which includes a tape guide unit including a set of spaced two tape guide substrates, a spacer provided between the tape guide substrates so as to dispose the two tape guide substrates through a predetermined distance in an approximately parallel relationship to each other, and guide poles for guiding the surface of a magnetic tape, arranged to extend through front portions of the tape guide substrates in a direction generally perpendicular to surfaces of the tape guide substrates, and a plurality of magnetic heads fixed, in a state where their postures are adjusted, to the tape guide unit.

Abstract: The present invention provides (1) a process for producing a desulfurization agent which comprises subjecting to hydrogen reduction a copper oxide-zinc oxide mixture prepared by co-precipitation process using a copper compound and a zinc compound; and (2) a process for producing a high temperature-resistant, high grade desulfurization agent which comprises subjecting to hydrogen reduction a copper oxide-zinc oxide-aluminum oxide mixture prepared by a co-precipitation process using a copper compound, a zinc compound and an aluminum compound.

Abstract: A pulverized coal combustion apparatus comprises a burner through which pulverized coal and carrier air are passed to be burnt in a combustion chamber, and a flame retainer disposed at an end of the burner. The flame retainer includes a flared tube and an annular plate, which plate has a plurality of radially inwardly projecting parts equiangularly spaced from each other. The annular plate comprises a plurality of ceramic pieces and a plurality of fastener elements, both of which are arranged and assembled alternately to form the annular plate. Each ceramic piece is so shaped that it projects radially inwardly to serve as the projecting part when assembled. The ceramic piece has at opposite sides thereof smoothly curved edge surfaces, and the fastener element has at opposite sides thereof smoothly curved edge surfaces which are engaged with the curved edge surfaces of neighboring two ceramic pieces.

Abstract: A paper feed device for a copying machine has plate member for supporting a stack of sheets thereon, and separating pawls turnably supported for movement toward and away from the top sheet of the stack and for lightly pressing on each of the forward end corners of the stack when moved toward the stack to the limit of turning movement. The mounting structure for the separating pawls causes them to be displaced in a direction laterally away from the edge of the stack during the turning of the pawls away from the stack to a lifted position.

Abstract: An electrophotographic copying machine comprises at least one paper supply unit from which a copying is automatically supplied towards a processing station, a manual feed mouth through which a copying paper is manually inserted into the machine, an electrophotographic processing unit for forming thermally fusible powder image on the copying paper, and a heat-fixing device for fusing and fixing the powder image on the copying paper. This machine is provided with a manual paper feed inhibiting device operable in such a manner the manual feed of the copying paper through the manual feed mouth is permitted only when and after the heat fixing device has attained the predetermined high temperature.

Abstract: Protection and safety device by which damage due to undesired exposure of photosensitive medium in a photocopying machine when the photocopying machine is switched off is prevented. A light blocking member is moved into the optical path for exposing the photosensitive medium when the light source and power source, respectively, for the copying machine are turned off and a cover portion for the machine is unlatched to prevent an undesired exposure of the medium and moved out of the optical path when the cover portion is latched and the light source and power source, respectively, are turned on to permit an exposure to take place.

Abstract: A transfer type electrophotographic copying apparatus of scanning system compact in size and efficient in copying operation and maintenance which is equipped with an improved copying sequence control arrangement through which an exposure lamp for an original to be copied, corona charger for a photoreceptor and also copy paper feeding device are adapted to be simultaneously turned ON by signal from one detecting means, while the number of detecting switches for operating various components of the copying apparatus in association with the copying operation is reduced to minimum by disposing such components at predetermined distances from each other, with the circuit for the control being also extremely simplified.

Abstract: In a transfer type electrophotographic copying apparatus which comprises a reciprocating platform for supporting an original to be copied, a rotatable photoreceptor drum of a small diameter, and processing devices of small size disposed around the photoreceptor drum for compact size of the copying apparatus, an improved transfer device and a transferred image disturbance prevention device are further included for efficient copying operations.

Abstract: A transfer type electrophotographic copying apparatus with a reciprocating platform to place an original to be copied thereon, which comprises a rotatable photoreceptor drum of a small diameter, and processing devices of small size disposed around the photoreceptor drum with minimum spaces necessary between the processing devices, so that the size and weight of the copying apparatus can be reduced to a large extent. The housing of the apparatus can be divided into an upper frame and a lower frame with the upper frame pivotally connected to the lower frame for easy access to the internal mechanisms in maintenance and replacing of the parts.