Abstract: According to one embodiment, a natural circulation type cooling apparatus includes a heat receiver with a heat receiving surface on which an exothermic body is mounted, and containing therein a coolant, a condenser on a horizontally lateral side of the heat receiver, a radiator on a horizontally lateral side of the heat receiver and on a vertically downward side of the condenser, a vapor conduit configured to feed vapor of the coolant to an inlet of the condenser, a condensed liquid conduit configured to feed a condensed coolant from an outlet of the condenser to an inlet of the heat receiver, a coolant conduit configured to feed the coolant to an inlet of the radiator, and a circulation conduit configured to feed the coolant from an outlet of the radiator to the inlet of the heat receiver.

Abstract: In a process for forming a solder mask, a photoimageable ink is coated on a carrier film to form a photoimageable ink layer on the carrier film. The photoimageable ink layer is dried to form a photoimageable resist layer, thereby forming at least one photoimageable resist layer bearing film. The photoimageable resist layer bearing film is laminated on at least one side of a substrate so as to bring the upper surface of the photoimageable resist layer into contact with the substrate. The photoimageable resist layer is exposed to light imagewise through the carrier film. The carrier film is removed from the photoimageable resist layer to form an exposed resist layer. The exposed resist layer is developed to form a developed resist layer. The developed resist layer is cured to form a solder mask on the substrate.

Abstract: An electrically-powered fishing reel includes a drive motor which rotationally drives a spool, and a speed change unit connected between an output section of the drive motor and a power transmission mechanism which transmits a rotation of the output section to the spool, and provided with a high-speed-driving gear transmission mechanism and a low-speed-driving gear transmission mechanism, and the electrically-powered fishing reel is operative to select, according to the rotating direction of the drive motor, either one of the high-speed-driving gear transmission mechanism or the low-speed-driving gear transmission mechanism and vary the rotational speed of the spool. A high-speed-driving output gear of the high-speed-driving gear transmission mechanism is connected to a power transmission mechanism for the spool without a low-speed-driving output gear of the low-speed-driving gear transmission mechanism being inserted between the high-speed-driving output gear and the power transmission mechanism.

Abstract: In a process for forming a solder mask, a photoimageable ink is coated on a carrier film to form a photoimageable ink layer on the carrier film. The photoimageable ink layer is dried to form a photoimageable resist layer, thereby forming at least one photoimageable resist layer bearing film. The photoimageable resist layer bearing film is laminated on at least one side of a substrate so as to bring the upper surface of the photoimageable resist layer into contact with the substrate. The photoimageable resist layer is exposed to light imagewise through the carrier film. The carrier film is removed from the photoimageable resist layer to form an exposed resist layer. The exposed resist layer is developed to form a developed resist layer. The developed resist layer is cured to form a solder mask on the substrate.

Abstract: A fishing reel includes: a reel body; a spool rotatably supported by the reel body; a handle shaft rotatably supported by the reel body; a handle arm provided at a distal end of the handle shaft; a transmission mechanism that transmits a rotation of the handle shaft to the spool via a drag device capable of adjusting braking force; and a braking force controlling element rotatably supported by the handle shaft, the braking force controlling element including an adjusting portion for adjusting the braking force applied to the drag device and an operation portion for the adjusting portion. The operation portion radially extends from an axis center of the handle shaft, and includes a bent portion which is formed at an intermediate portion of the operation portion and bent toward the reel body side.

Abstract: A fishing reel includes: a reel body; a spool rotatably supported by the reel body; a handle shaft rotatably supported by the reel body; a handle arm provided at a distal end of the handle shaft; a transmission mechanism that transmits a rotation of the handle shaft to the spool via a drag device capable of adjusting braking force; and a braking force controlling element rotatably supported by the handle shaft, the braking force controlling element including an adjusting portion for adjusting the braking force applied to the drag device and an operation portion for the adjusting portion. The operation portion radially extends from an axis center of the handle shaft, and includes a bent portion which is formed at an intermediate portion of the operation portion and bent toward the reel body side.

Abstract: An electrically-powered fishing reel includes a drive motor which rotationally drives a spool, and a speed change unit connected between an output section of the drive motor and a power transmission mechanism which transmits a rotation of the output section to the spool, and provided with a high-speed-driving gear transmission mechanism and a low-speed-driving gear transmission mechanism, and the electrically-powered fishing reel is operative to select, according to the rotating direction of the drive motor, either one of the high-speed-driving gear transmission mechanism or the low-speed-driving gear transmission mechanism and vary the rotational speed of the spool. A high-speed-driving output gear of the high-speed-driving gear transmission mechanism is connected to a power transmission mechanism for the spool without a low-speed-driving output gear of the low-speed-driving gear transmission mechanism being inserted between the high-speed-driving output gear and the power transmission mechanism.

Abstract: A photocurable and thermosetting composition which is useful in forming a matte film and can be developed with an aqueous alkaline solution is provided. The composition comprises (A) a photosensitive prepolymer obtained by causing a saturated or unsaturated polybasic acid anhydride to react with a hydroxyl group of an esterification product of a novolak type epoxy compound and an unsaturated monocarboxylic acid, (B) a carboxyl group-containing copolymer resin, (C) a photopolymerization initiator, (D) a diluent, (E) a polyfunctional epoxy compound having at least two epoxy groups in its molecule, and, when necessary, (F) an inorganic filler. The composition may further comprise (G) an epoxy resin curing agent. This composition can be advantageously used for the formation of a solder resist on a printed circuit board.

Abstract: A multilayer printed circuit board having resinous insulating layers and conductor layers alternately superposed on a circuit board with ample adhesive strength, a method for the production thereof, and a curable resin composition useful for the formation of resinous insulating layers are disclosed. The manufacture of the multilayer printed circuit board is accomplished by applying the curable resin composition to the surface of conductor layer of the circuit board, thermally curing the applied layer thereby forming resinous insulating layer, then boring a through-hole in the circuit board, treating the resinous insulating layer with a coarsening agent thereby imparting undulating coarsened surface thereto, subsequently coating the surface of resinous insulating layer and the inner surface of the through-hole with a conductor layer as by electroless plating, and thereafter forming a prescribed circuit pattern in the conductor layer.

Abstract: A photocurable and thermosetting composition which is useful in forming a matte film and can be developed with an aqueous alkaline solution is provided. The composition comprises (A) a photosensitive prepolymer obtained by causing a saturated or unsaturated polybasic acid anhydride to react with a hydroxyl group of an esterification product of a novolak type epoxy compound and an unsaturated monocarboxylic acid, (B) a carboxyl group-containing copolymer resin, (C) a photopolymerization initiator, (D) a diluent, (E) a polyfunctional epoxy compound having at least two epoxy groups in its molecule, and, when necessary, (F) an inorganic filler. The composition may further comprise (G) an epoxy resin curing agent. This composition can be advantageously used for the formation of a solder resist on a printed circuit board.

Abstract: A multilayer printed circuit board having resinous insulating layers and conductor layers alternately superposed on a circuit board with ample adhesive strength, a method for the production thereof, and a curable resin composition useful for the formation of resinous insulating layers are disclosed. The manufacture of the multilayer printed circuit board is accomplished by applying the curable resin composition to the surface of conductor layer of the circuit board, thermally curing the applied layer thereby forming resinous insulating layer, then boring a through-hole in the circuit board, treating the resinous insulating layer with a coarsening agent thereby imparting undulating coarsened surface thereto, subsequently coating the surface of resinous insulating layer and the inner surface of the through-hole with a conductor layer as by electroless plating, and thereafter forming a prescribed circuit pattern in the conductor layer.

Abstract: A multilayer printed circuit board having resinous insulating layers and conductor layers alternately superposed on a circuit board with ample adhesive strength, a method for the production thereof, and a curable resin composition useful for the formation of resinous insulating layers are disclosed. The manufacture of the multilayer printed circuit board is accomplished by applying the curable resin composition to the surface of conductor layer of the circuit board, thermally curing the applied layer thereby forming resinous insulating layer, then boring a through-hole in the circuit board, treating the resinous insulating layer with a coarsening agent thereby imparting undulating coarsened surface thereto, subsequently coating the surface of resinous insulating layer and the inner surface of the through-hole with a conductor layer as by electroless plating, and thereafter forming a prescribed circuit pattern in the conductor layer.

Abstract: A multilayer printed circuit board having resinous insulating layers and conductor layers alternately superposed on a circuit board with ample adhesive strength, a method for the production thereof, and a curable resin composition useful for the formation of resinous insulating layers are disclosed. The manufacture of the multilayer printed circuit board is accomplished by applying the curable resin composition to the surface of conductor layer of the circuit board, thermally curing the applied layer thereby forming resinous insulating layer, then boring a through-hole in the circuit board, treating the resinous insulating layer with a coarsening agent thereby imparting undulating coarsened surface thereto, subsequently coating the surface of resinous insulating layer and the inner surface of the through-hole with a conductor layer as by electroless plating, and thereafter forming a prescribed circuit pattern in the conductor layer.

Abstract: A liquid thermosetting filling composition comprising (A) an epoxy resin assuming a liquid state at room temperature, (B) a phenolic resin assuming a liquid state at room temperature, (C) a curing catalyst, and (D) an inorganic filler is useful as an ink for permanently filling such holes as via holes and through holes in printed circuit boards of a multilayer board or a double-sided board, a sealing compound for IC packages, and the like. This composition is a two-stage thermally curing type. In a method for permanently filling holes in a printed circuit board, the composition is applied to the board so as to fill the holes in the printed circuit board and precured by application of heat. The parts of the precured composition protruding from a surface defining the holes is removed by polishing and then the precured composition is further heated to cause final curing thereof.