Abstract: A welding head which can easily move the torch portion of the welding head in the circumferential direction and the vertical moving direction of the outer circumference of the to-be-welded tubes even in a narrow gap, includes a torch rotating ring that rotates on the outer circumferences of the tubes by matching with the central axis of the to-be-welded tubes and a torch vertical moving ring disposed concentrically with the ring inside the ring, provided with a torch base for supporting a torch on the front ends, a first gear group for driving and rotating the ring around the tubes, a second gear group that is disposed in parallel to the first gear group and drives and rotates the ring around the tubes, a drive shaft for driving the two gear groups, and a torch rotating motor for driving the drive shaft, and a third gear group that can drive the ring while rotating it in the same direction as or in reverse to that of the ring at a speed equal to or higher or lower than that of the first gear group for rotatin

Abstract: An ultra-flat non-consumable electrode welding torch which allows performing a welding operation through a narrow gap between adjacent piping such as welding piping of a boiler panel, to be mounted on a compact automatic welding head, and a welding head provided with such a welding torch are to be provided. As a gas supply mechanism that supplies a shield gas to a welding section formed at the tip of the non-consumable electrode through inside of the torch body for the non-consumable electrode welding, a gas supply path is provided for supplying the shield gas from an outer gas space in a double ring shaped gas space provided around a non-consumable electrode and divided by a partition wall, to an inner gas space through a plurality of orifices provided at regular intervals in the partition wall, and the gas is blown from the inner gas space to the region around the non-consumable electrode through a metal mesh plate.

Abstract: A welding head which can easily move the torch portion of the welding head in the circumferential direction and the vertical moving direction of the outer circumference of the to-be-welded tubes even in a narrow gap, includes a torch rotating ring that rotates on the outer circumferences of the tubes by matching with the central axis of the to-be-welded tubes and a torch vertical moving ring disposed concentrically with the ring inside the ring, provided with a torch base for supporting a torch on the front ends, a first gear group for driving and rotating the ring around the tubes, a second gear group that is disposed in parallel to the first gear group and drives and rotates the ring around the tubes, a drive shaft for driving the two gear groups, and a torch rotating motor for driving the drive shaft, and a third gear group that can drive the ring while rotating it in the same direction as or in reverse to that of the ring at a speed equal to or higher or lower than that of the first gear group for rotatin

Abstract: An ultra-flat non-consumable electrode welding torch which allows performing a welding operation through a narrow gap between adjacent piping such as welding piping of a boiler panel, to be mounted on a compact automatic welding head, and a welding head provided with such a welding torch are to be provided. As a gas supply mechanism that supplies a shield gas to a welding section formed at the tip of the non-consumable electrode through inside of the torch body for the non-consumable electrode welding, a gas supply path is provided for supplying the shield gas from an outer gas space in a double ring shaped gas space provided around a non-consumable electrode and divided by a partition wall, to an inner gas space through a plurality of orifices provided at regular intervals in the partition wall, and the gas is blown from the inner gas space to the region around the non-consumable electrode through a metal mesh plate.

Abstract: An opening portion 3 is produced by cutting a recirculating piping 72 connected to a recirculating nozzle 2 of a reactor pressure vessel 1. A repairing device is brought into an annulus 10 of the reactor pressure vessel 1 from the opening 3, thereby repairing the annulus 10.

Abstract: An opening portion 3 is produced by cutting a recirculating piping 72 connected to a recirculating nozzle 2 of a reactor pressure vessel 1. A repairing device is brought into an annulus 10 of the reactor pressure vessel 1 from the opening 3, thereby repairing the annulus 10.

Abstract: An opening portion 3 is produced by cutting a recirculating piping 72 connected to a recirculating nozzle 2 of a reactor pressure vessel 1. A repairing device is brought into an annulus 10 of the reactor pressure vessel 1 from the opening 3, thereby repairing the annulus 10.

Abstract: An excellent welding tip in the feed stability of a wire, in the release capacity of foreign matter, and in the stability of current control, and a process for manufacturing such a tip economically, is achieved in accordance with a sectional shape of a guide hole opened and provided to a welding tip. The sectional shape is derived by forming a wire in a passable non-circular shape. The sectional shape of the guide hole may be a polygonal or elliptic shape, or approximately so. In the case of making the sectional shape of the guide hole polygonal, it is more preferable to make it a polygon circumscribing on a circle, for example, such a polygon circumscribing on a larger circle than the outer diameter of the wire to be inserted into the guide hole by 0.02-0.20 mm in diameter. Specifically, it is preferable to arrange the sectional shape as a triangle.

Abstract: A method for producing a silver halide photographic light-sensitive material is disclosed. The silver halide photographic light-sensitive material comprises a support having thereon photographic layers including a silver halide emulsion layer, a first hydrophilic colloid layer and an outermost second hydrophilic colloid layer in this order from the support. The light-sensitive material is produced by a method comprising steps offorming the photographic layer by coatinga silver halide emulsion coating solution comprising silver halide grains, gelatin and water to form said silver halide emulsion layer;a first hydrophilic colloid solution comprising gelatin and water to form said first hydrophilic colloid layer; anda second hydrophilic colloid solution comprising gelatin, particles of matting agent having a size of not less than 4 .mu.m in an amount of 4 mg/m.sup.2 to 50 mg/m.sup.

Abstract: A method of preparing a light sensitive silver halide photographic material is disclosed. In the method a coated layer surface temperature is not higher than 19.degree. C. when a percentage of water to binder is within the range of 800-200% by weight on a side coated with the light sensitive silver halide emulsion layer, and the light sensitive material can be dried up by taking not shorter than 35 seconds to get a percentage within the range of 800-200% by weight. A light sensitive photographic material is also disclosed. The material has a specific surface smoothness degree and contains matting agent, and is prepared by above-mentioned method.

Abstract: The improved silver halide photographic material comprises a support having an antistatic coating thereon that contains a water-soluble conductive polymer, hydrophobic polymer particles and a curing agent which is a bifunctional ethylene oxide type curing agent that is to be cured by exposure to electron beams or X-rays. This silver halide photographic material may contain a tetrazolium compound or a hydrazine compound in order to prevent desensitization due to aging. At least one hydrophilic colloidal layer may be provided on the antistatic coating, which colloidal layer contains an epoxy curing agent having a hydroxy group.

Abstract: An improved process for producing a silver halide photographic material that has at least one light-sensitive silver halide emulsion layer on a support as well as at least one hydrophilic colloidal layer coated on both sides of the support. The process is characterized in that the hydrophilic colloidal layers on the two sides of the support are dried simultaneously and that a matting agent having a particle size of at least 4 .mu.m is incorporated in the outermost layer on both sides of the support in an amount of at least 4 mg/m.sup.2.

Abstract: In an automatic developing machine in which a photographic film is dried by a drying unit after development, a method of controlling the temperature and/or humidity of the film drying air in order to prevent variation in the film size before and after the processes of development and drying, which comprises prior computation of the variations in the film size according to a temperature and humidity of outside air, thereby determining the optimum operating condition of the drying unit from a result of the prior computation, and thereafter setting the drying unit with the optimum operating condition so that the automatic developing machine may process the film without variation in the film size.

Abstract: In the improved method of processing an imagewise exposed silver halide photographic material that has photographic constituent layers on a side of a support with an automatic processor, comprising:circulating a fixing solution in a fixing bath being discharged in a volume of 30-200% per minute of a capacity of said fixing bath and at a flow rate of not less than 20 m per minute,wherein said silver halide photographic material has a gelatin content of not more than 3.0 g/m.sup.2 in said photographic constituent layers, andsaid photographic constituent layers comprise a silver emulsion layer which contains silver halide grains having a (100) face to (111) face area ratio of not less than 5.

Abstract: A method of preparing a light sensitive silver halide phtographic material is disclosed. The photographic material comprises a polyester support having a hydrophobic polymer layer containing a vinylidene chloride copolymer and at least one hydrophilic polymer layer. The method comprises steps of coating a hydrophilic polymer layer onto the polyester support, drying the layer until a water content of the layer reaches 60 wt %, and contacting the layer with air having a relative humidity of 5 to 25% for a period 5 seconds to 10 minutes. The photographic material according to the method has such a physical characteristics as dimensional stability for long time storage or anti-cracking of the photographic layer at the preparation period. It is suitable for printing use.

Abstract: A silver halide light-sensitive photographic material having an improved safe-light insensitivity and, therefore, capability of being easily handled in the light room is disclosed. The material comprises a support; at least one silver halide emulsion layer being provided on one side of the support and containing silver halide grains containing at least 50 mol % of silver chloride, 10.sup.-4 to 10.sup.-8 mol per 1 mol of silver halide of a rhodium salt and a desensitizing dye; and at least one hydrophilic colloidal layer being provided on the other side of the support and containing at least one dye so that the absorbancy of the dye at the maximum spectral sensitivity wavelength (.lambda.max) of the densenitizing dye is not less than 0.3 and the absorbance ratio at the maximum spectral sensitivity wavelength against that at 450 nm is not less than 0.2.

Abstract: In an automatic developing machine in which a photographic film is dried by a drying unit after development, a method of controlling the temperature and/or humidity of the film drying air in order to prevent variation in the film size before and after the processes of development and drying, which comprises prior computation of the variations in the film size according to a temperature and humidity of outside air, thereby determining the optimum operating condition of the drying unit from a result of the prior computation, and thereafter setting the drying unit with the optimum operating condition so that the automatic developing machine may process the film without variation in the film size.

Abstract: A silver halide photographic light-sensitive material, and a method of preparing the same and a method of image forming using the same photographic material. The photographic material comprises a support bearing, on one side thereof, a layer containing a light-sensitive silver halide emulsion comprised of silver halide grains having an average size of from 0.05 .mu.m to 0.3 .mu.m and gelatin and, on the other side thereof, a non-light-sensitive layer containing gelatin and at least one of the emulsion layer and the non-light-sensitive layer is brought into contact with air having a temperature of from 35.degree. C. to 80.degree. C. or relative humidity of from 5% to 25% for a period not shorter than 5 seconds to not longer than one minute, within 5 minutes from the point of time when the average surface temperature of said layer is raised up to a temperature 1.degree. C.

Abstract: A process for manufacturing a silver halide direct positive type emulsion comprising primarily silver bromide prepared in the presence of a water-soluble rhodium salt said process comprising; simultaneously adding and mixing a silver aqueous solution and a halide aqueous solution to form an aqueous solution containing a hydrophilic colloid, said resultant mixture having a silver potential maintained with a range of from 100 mV to 200 mV, the speed at which the solutions are added being not more than the critical growth speed of existing silver halide grains, and fogging said silver halide grains.

Abstract: There is proposed a process of continuously producing a catalyst plate, wherein a thin metal plate is formed by use of a blade with slits in the widthwise directions thereof, expanded in the longitudinal direction thereof into an expanded metal plate having formed therein meshes, the expanded metal plate thus formed is corrected in shape, degreased, thereafter, molten metal such as molen aluminum is sprayed onto the expanded metal plate to form roughened surfaces on the opposite sides of the expanded metal plate, further, a catalytic substance is deposited onto the roughened surfaces, thereafter, formed into a predetermined form, and shorn into pieces. There is proposed a pinch roll system having a tension roll, in which end portions in the widthwise direction are vertically movable so as to be used as a corrector for the expanded metal plate, and a stepping press system to be used as a former for the expanded metal plate.