Abstract: A photosensitive resin (A) consisting substantially of a product obtained by reacting a polyester (c) which is a reaction product of a polyol (a) with a tetrabasic acid dianhydride (b) with a compound (d) having an ethylenically unsaturated group and an epoxy group in the molecule; an alkali-soluble photosensitive resin (AA) obtained by reacting the photosensitive resin (A) with a di- or tri-basic acid mono-anhydride (e); photosensitive resin compositions prepared by incorporating the above photosensitive resin with a diluent (XX), a crosslinking agent (B) and/or a photopolymerization initiator (C); products of curing of the compositions; and articles equipped with these products. The resins and resin compositions give cured articles which are suitable for the formation of optical waveguides and excellent in processability, transparency, developability, close adhesion, resistance to soldering heat, and so on.

Abstract: The object of the present invention is to provide an epoxy resin and epoxy resin composition having a low viscosity which can afford a cured product having an excellent heat resistance. The present invention is characterized by using an epoxy resin which is obtained by reacting 5-methylresorcin with epihalohydrin in the presence of alkali metal hydroxide.

Abstract: A cartridge for insecticide transpiration includes an annular hollow structure which has openings in the inner peripheral surface and an outer peripheral surface thereof; a core portion situated at the center of the hollow structure for connecting to the rotation support shaft; a plurality of spoke portions connecting the core portion and the hollow structure; and blade portions integrally formed with the hollow structure so as to extend from the inner peripheral surface toward the center thereof and adapted to promote passing of air from the inner peripheral surface to the outer peripheral surface of the hollow structure, and; an insecticide transpiration apparatus wherein a cartridge for insecticide transpiration accommodating granular chemical-impregnated material 3 in the hollow structure is connected to a motor through the rotation support shaft and the cartridge for insecticide transpiration.

Abstract: A coreless rubber crawler which cancels the difference in the amounts of deformation strains in the main body to improve the durability and which ensures transverse rigidity to prevent coming off of wheels, wherein a peripheral main cord and a reinforcing cord disposed on an outer periphery thereof are embedded in a main body having a thickness T, wherein an embedded depth H of the cord embedded in an outermost peripheral layer of the main body, the depth being measured from an inner peripheral surface of the main body, satisfies H≧½×T.

Abstract: An insecticidal mat which is applied to a portable heat-transpiration apparatus and is capable of maintaining the insecticidal effect continuously over 8 hours or more even in an open space, and a heat-transpiration insecticidal method using the same. The insecticidal mat comprises a fibrous mat having a size of 1,000 to 2,500 mm2 which contains 250 to 600 mg of allethrin as an insecticidal ingredient, 600 to 1,000 mg of piperonyl butoxide as a volatilization controlling agent and 10 to 100 mg of at least one member selected from the group consisting of 2,5-di-t-butylhydroquinone, 3,5-di-t-hydoxytoluene and 3-t-butyl-4-hydroxyanisole as a volatilization controlling agent per mat, wherein the mat is used by setting on a radiation plate which has an area of 1,000 to 2,500 mm2, has a temperature of 150 to 190° C. at its central portion, and has a temperature difference between the central portion and its edge portion of 10° C. or less.

Abstract: There is provided an insecticide transpiration apparatus capable of transpiring insecticide at room temperature.

Abstract: The object of the present invention is to provide an epoxy resin and epoxy resin composition having a low viscosity which can afford a cured product having an excellent heat resistance. The present invention is characterized by using an epoxy resin which is obtained by reacting 5-methylresorcin with epihalohydrin in the presence of alkali metal hydroxide.

Abstract: A coreless rubber crawler which cancels the difference in the amounts of deformation strains in the main body to improve the durability and which ensures transverse rigidity to prevent coming off of wheels, wherein a peripheral main cord and a reinforcing cord disposed on an outer periphery thereof are embedded in a main body having a thickness T, wherein an embedded depth H of the cord embedded in an outermost peripheral layer of the main body, the depth being measured from an inner peripheral surface of the main body, satisfies H≧½×T.

Abstract: A stencil printing machine 1 is provided with a stencil drum 16 and a opposite 17 which are a pair of cylindrical parts located with their external peripheral surfaces being close to each other, a stencil sheet 15 being detachably wound on the external peripheral surface of the stencil drum 16, and serves to perform stencil printing process by rotating the stencil drum 16 and the opposite 17 in order that the external peripheral surfaces thereof are located close to each other and moved in the same direction while the stencil sheet 15 is pressed against the opposite 17, and by making the stencil sheet 15 in contact under pressure with a sheet of paper 22 passing between the stencil drum 16 and the opposite 17 by the pressing force of the stencil drum 16. The stencil drum 16 is detachably mounted on the stencil printing machine and provided with storage units 201 to 203 for storing information about the pressing force of the stencil drum 16 against the opposite 17.

Abstract: An insecticidal mat which is applied to a portable heat-transpiration apparatus and is capable of maintaining the insecticidal effect continuously over 8 hours or more even in an open space, and a heat-transpiration insecticidal method using the same. The insecticidal mat comprises a fibrous mat having a size of 1,000 to 2,500 mm2 which contains 250 to 600 mg of allethrin as an insecticidal ingredient, 600 to 1,000 mg of piperonyl butoxide as a volatilization controlling agent and 10 to 100 mg of at least one member selected from the group consisting of 2,5-di-t-butylhydroquinone, 3,5-di-t-hydoxytoluene and 3-t-butyl-4-hydroxyanisole as a volatilization controlling agent per mat, wherein the mat is used by setting on a radiation plate which has an area of 1,000 to 2,500 mm2, has a temperature of 150 to 190° C. at its central portion, and has a temperature difference between the central portion and its edge portion of 10° C. or less.

Abstract: According to the stencil printing machine of the present invention, ink that has entered the gap between a circumferential wall and a stencil sheet is allowed to escape to the outsides of an inner pressing roll in the axis direction. When it reaches the outer circumferential face of an ink free passage section of a screen, the escape ink is allowed to pass through the ink free passage section by a pressing force from the pressure drum, and directed to the inner circumferential side; therefore, it is possible to prevent the escape ink from reaching the right and left ends of the stencil sheet, and consequently to eliminate the limitation to the number of prints in endurance printing processes that is imposed due to ink leakage from the stencil. Moreover, since it is not necessary to form a raised portion along the circumferential face, the printing drum can be easily manufactured at low costs.

Abstract: An electronic device has a frame and a back board having plural logical units and power supply units mounted thereon. The logical units and the power supply units are alternately located on both sides of the back board in the center of the frame so that the power supply units mounted on one side of the back board may feed a power to the closest logical units mounted on the other side. Further, the air flow paths to be circulated through the logical units and the power supply units are formed so that each unit may be efficiently cooled by the air fed by an air fan unit. As a result, the feeding voltage becomes uniform and the cooling efficiency is improved.

Abstract: A stencil printing machine 1 is provided with a stencil drum 16 and a opposite 17 which are a pair of cylindrical parts located with their external peripheral surfaces being close to each other, a stencil sheet 15 being detachably wound on the external peripheral surface of the stencil drum 16, and serves to perform stencil printing process by rotating the stencil drum 16 and the opposite 17 in order that the external peripheral surfaces thereof are located close to each other and moved in the same direction while the stencil sheet 15 is pressed against the opposite 17, and by making the stencil sheet 15 in contact under pressure with a sheet of paper 22 passing between the stencil drum 16 and the opposite 17 by the pressing force of the stencil drum 16. The stencil drum 16 is detachably mounted on the stencil printing machine and provided with storage units 201 to 203 for storing information about the pressing force of the stencil drum 16 against the opposite 17.

Abstract: A stencil printer has a printing drum which has an ink-permeable peripheral wall around which a stencil master is wound and to the inner surface of which ink is supplied. The printing drum is rotated about its longitudinal axis. An internal press roller is disposed inside the printing drum and is rotated in contact with the inner surface of the peripheral wall of the printing drum. A paper pinch drum is disposed outside the printing drum and is pressed against the peripheral wall of the printing drum with a printing paper pinched between the pinching means and the stencil master wound around the peripheral wall. A retainer roller is disposed in a predetermined position near the internal press roller and the inner surface of the peripheral wall downstream of the contact line between the internal press roller and the inner surface of the peripheral wall in the direction of rotation of the printing drum.

Abstract: A rubber pad comprises a support plate having substantially the same shape as an outer surface of an iron shoe plate provided on its outer surface with lugs, a rubber block vulcanized and adhered to the support plate, wherein the support plate is provided with a bolt or a female member fixed to at least one side face of the support plate, a hook member fixed to the support plate at a position opposite to the bolt or female member. Further, the rubber pad is provided with a fastening member securing the rubber pad to the iron shoe plate through another female member or bolt.

Abstract: A stencil printing machine includes a printing drum having a flexible ink-permeable circumferential wall adapted to receive a perforated stencil sheet around an outer circumferential surface thereof, the printing drum being driven to rotate around a central axis thereof; a pressing device situated inside the printing drum for supplying ink to an inner surface of the circumferential wall, the pressing device being movable between a pressing position for pressing the circumferential wall to be deformed radially outwardly and a standing position for releasing the circumferential wall from deformation; an opposing drum disposed adjacent to the printing drum and driven to rotate in a direction opposite to that of the printing drum, the opposing drum having a recess formed in an outer circumferential surface thereof; a clamp disposed on an outer circumferential surface of the opposing drum and operating in synchronization with rotation of the opposing drum to hold a leading edge of a printing sheet supplied between

Abstract: The derivatives of esters of carboxylic acids represented by the general formula I: ##STR1## wherein: R.sub.1 is an alkyl group having a chain or branched chain of 1 to 4 carbon atoms; andR.sub.2 is a group represented by the following general formulae II, III or IV; ##STR2## wherein: R.sub.3 is a hydrogen atom or a methyl group;X is an oxygen atom or a methylidene group;R.sub.4 is an hydrogen atom or an ethynyl group;R.sub.5 and R.sub.6 are alike or differently selected from the group consisting of hydrogen, fluorine, chlorine atoms or methyl group;R.sub.7 is a hydrogen atom or a trifluoromethyl group;R.sub.8 is selected from the group consisting of propargyl, methoxymethyl or methylthio groups; orR.sub.7 and R.sub.8 may combine with each other to form a methylenedioxy chain; and the process for manufacturing the same, and the insecticides and the insect proofing agents containing the same as an active ingredient.

Abstract: In a stencil printer, in order to definitely prevent an ink leakage even when the perforated portion 20c of the printing drum laps over the clamp 25 of the back press roller 14, the portions of a part of the outer circumferential surface of the back press roller positioned adjacent to the rear and opposite side edges of the clamp 25 is provided by a movable circumferential member 66 adapted to bias rearward relative to the clamp in synchronization with the opening operation of the clamp, so as thereby to cancel the clearance formed along the periphery of the clamp without obstructing the opening operation of the clamp.

Abstract: The present invention provides a long-acting insecticidal mat which is applied to the electric mosquito-repellent mat system and is capable of maintaining the insecticidal effect for a long period, not less than five days, and a heat-transpiration insecticidal method using the mat, wherein a fibrous mat which is impregnated with not less than 50 mg per mat of an insecticidal ingredient of pyrethroid having not less than 4.0.times.10.sup.-6 mmHg of vapor pressure at 20.degree. C. is used by means of setting the mat on a radiation plate which has an area of 0.2 to 0.6 time as large as the base area of the mat and has a heating temperature of 70 to 170.degree. C.

Abstract: In the ink supply construction of a stencil printer, having an ink holding space 14 defined by an outer circumferential surface of an ink supply roller 4 and an ink supply control member 8, there is provided an ink interrupting member 30 as opposed to the ink supply control member across the ink holding space for restricting a side of the ink holding space opposite to the ink supply control member, in order to stabilize and highly uniformalize the cross sectional size of a rotating lump of ink L formed in the ink holding space along the length of the lump of ink. The lump of ink may be rotationally driven by an ink driving rod member 15 provided in the ink holding space. When the lump of ink is not rotationally driven by the ink driving rod member, the ink interrupting member may be constructed to rotationally drive the lump of ink.