Abstract: A laminated core punching apparatus, configured such that a stator-punching press machine that has a molding die performing a partial punching gradually approaches the shape of the stator core piece. There is a punching die to punching out the stator core piece from a strip-form steel plate, and two stator lamination stations. A rotor-punching press machine and a stator-punching press machine are constructed to operate synchronously. An intermediate loop portion capable of causing a strip-form steel plate to hang down in a loop is provided in order to adjust a length of the strip-form steel plate between the two press machines, and a loop guide portion that guides a loop locus of the strip-form steel plate from above so that the strip-form steel plate does not invert is disposed above the intermediate loop portion to be capable of ascending and descending.

Abstract: The light-amount-adjustment apparatus includes a base member formed with cam-groove portions, and light-blocking blades forming a variable light-passing aperture and each of which is provided with a driving pin and a cam pin, the cam pin engaging one of the cam-groove portions. The apparatus also includes a driving ring disposed on a side of the blades opposite from the base member and rotating with respect to the base member to transmit a driving force to the driving pins so as to rotate the light-blocking blades. A base-member side face of each light-blocking blade is supported by the base member. The driving ring is formed with first blade-supporting portions protruding from a ring-shaped portion outward in a radial direction and including a driving-hole portion with which the driving pin engages. Each first blade-supporting portion supports an opposite-side blade face opposite to the base-member side blade face of a light-blocking blade.

Abstract: The present invention aims to provide techniques for preparing matte coated printing papers having high opacity and brightness as well as improved brightness variation at low basis weight with good runnability. According to the present invention, a process for preparing a matte coated printing paper having a basis weight of 60 to 90 g/m2, a brightness of 75% or more, and an opacity of 95% or more is provided, comprising applying a coating solution containing calcium carbonate by curtain coating on a base paper having a brightness of 45 to 70% made from a raw material pulp containing a total of 50% or more of deinked pulp and/or mechanical pulp.

Abstract: A resin filling device for a laminated iron core, the resin filling device being used when a magnet insertion hole provided in the laminated iron core of a rotor for an electric motor is filled with a molten resin for fixing a magnet. The resin filing device configured with a resin feeding mold, an opposing mold, and a pressing mechanism that applies a compression force with the laminated iron core sandwiched between the resin feeding mold and the opposing mold. The resin feeding mold includes one or more discharge outlets arranged so as to face the opening of the magnet insertion hole, and configured to include a diameter reducing part in which an inner diameter is reduced gradually along a discharge direction of the molten resin. A diameter reducing part is arranged inside of the laminated iron core.

Abstract: A manufacturing method for an electric motor rotor includes: a stacking process in which a plurality of iron core pieces are stacked to form a laminated iron core; a magnet insertion process in which a permanent magnet is inserted into a magnet insertion hole provided in the laminated iron core; a resin filling process in which the laminated iron core is heated to fill the magnet insertion hole with a molten resin for magnet fixation; and a rotary shaft assembly process in which a rotary shaft is warm-fitted into a rotary shaft insertion hole of the laminated iron core utilizing residual heat from the heating of the laminated iron core 10 in the resin filling process.

Abstract: A positive electrode and a negative electrode are accommodated in a bottomed cylindrical battery case with a separator interposed therebetween, and an opening part of the battery case is sealed by means of a gasket. A body part of the battery case has a thickness in the range between 0.1 and 0.17 mm. The positive electrode is made of a material obtained by adding graphite to manganese dioxide. The density of the graphite in the material of the positive electrode is in the range between 0.12 and 0.23 g/cm3.

Abstract: A gasket is made of an injection molded resin integral with a cylindrical boss portion having a through hole in which a current collector is inserted, a rim portion for sealing an opening of a battery case, and a connecting portion for connecting the boss portion and the rim portion, wherein the boss portion has an annular injection portion at an end face thereof, which is a trace of an injection molding gate, a ratio (S1/S2) between an axial cross-sectional area (S1) of the boss portion and an axial cross-sectional area (S2) of the injection portion is in the range of 10 to 25, and an outer diameter of the boss portion is in the range of 3.0 to 4.2 mm.

Abstract: A method of manufacturing a gear, and the resulting gear, the method resulting such that the surface layer portions of the tooth portions and a tooth root portion are made to be a carburized layer, the remaining portion of the tooth portions and a portion of a disk portion lying below the carburized layer be a quench-hardened layer, and a region of the disk portion lying deeper than the quench-hardened layer be an unquenched layer. The gear is manufactured using raw material steel having the following chemical composition: C: 0.1% to 0.40% (% by mass), Si: 0.35% to 3.0%, Mn: 0.1% to 3.0%, Cr: less than 0.2%, Mo: 0.1% or less, P: 0.03% or less, S: 0.15% or less, Al: 0.05% or less, N: 0.03% or less, and Fe and unavoidable impurities.

Abstract: A carburized steel member is manufactured by specific carburizing, cooling, and quenching steps. The steel member contains: C: 0.1% to 0.4%, Si: 0.35% to 3.0%, Mn: 0.1% to 3.0%, P: 0.03% or less, S: 0.15% or less, Al: 0.05% or less, and N: 0.03% or less, and a content of Cr is less than 0.2%, a content of Mo is 0.1% or less, and remainder is constituted of Fe and unavoidable impurities. A surface layer thereof includes: a first layer having a carbon concentration of 0.60 mass % to 0.85 mass % and including a martensitic structure in which no grain boundary oxide layer caused by Si exists; a second layer having a carbon concentration of 0.1 mass % to 0.4 mass % and including a martensitic structure; and a third layer having a carbon concentration of 0.1 mass % to 0.4 mass % and including no martensitic structure.

Abstract: An alkaline primary battery includes: a positive electrode 2 containing manganese dioxide; an alkaline electrolyte containing zinc oxide; a gelled negative electrode 3 containing zinc alloy particles, the alkaline electrolyte, and a gelling agent; and a negative electrode current collector 6 inserted in the gelled negative electrode. The gelled negative electrode 3 has a predetermined malleability such that when 4.0 g of the gelled negative electrode 3 formed into a cylindrical shape with a diameter of 15 mm is extended with 200 g of a load through 10 g of a flat plate, and then an upper surface of the extended gelled negative electrode 3 is approximated to a circle, this circle has a diameter ranging from 24 mm to 36 mm, both inclusive.

Abstract: The light amount adjustment apparatus includes a base member formed with cam groove portions, light-blocking blades forming a variable light-passing aperture and being provided with a driving pin and a cam pin engaging with each cam groove portion, a driving ring disposed on an opposite side to a base member side with respect to the light-blocking blades and rotating with respect to the base member to transmit driving force to the driving pins so as to rotate the light-blocking blades. A base member side face of each light-blocking blade is supported by the base member. The driving ring is formed with first blade supporting portions protruding from a ring-shaped portion outward in a radial direction and including a driving hole portion with which the driving pin engages. Each first blade supporting portion supports an opposite side blade face to the base member side blade face of each light-blocking blade.

Abstract: The present invention provides an alkaline battery which has high reliability and high cost performance and does not cause an internal short circuit resulting from gel leakage even when the filling densities of the positive and negative electrodes are reduced. In the alkaline battery, a positive electrode 2 contains manganese dioxide as a positive electrode active material, a negative electrode 3 is a gel negative electrode containing zinc as a negative electrode active material, a filling density of manganese dioxide in the positive electrode 2 is in a range of 2.31 to 2.45 g/cm3, a filling density of zinc in the negative electrode 3 is in a range of 1.49 to 1.65 g/cm3, and a ratio (h1/h2) between a height of the positive electrode 2 (h1) and a height of the negative electrode 3 (h2) is in a range of 0.96 to 1.06.

Abstract: An alkaline dry battery of this invention includes: a positive electrode including at least one of a manganese dioxide powder and a nickel oxyhydroxide powder; a negative electrode including a zinc alloy powder; a separator interposed between the positive electrode and the negative electrode; an alkaline electrolyte; and a battery case for housing the positive electrode, negative electrode, the separator, and the alkaline electrolyte. The negative electrode further includes a surfactant that adsorbs to a surface of the zinc alloy powder during a non-discharge period and promptly desorbs from the surface of the zinc alloy powder upon start of discharge without impeding ion transfer in the alkaline electrolyte.

Abstract: A method of manufacturing a stator includes forming a stator by assembling segment cores, formed by dividing a stator core in a circumferential direction at a formation position of a slot of the stator core, to a coil conductor that is formed of a rectangular wire bent to include linear portions arranged in the slot and bridge portions that alternately connect the linear portions on one end and the other end of the coil conductor such that the linear portions can be arranged side by side on an imaginary circumference, and fitting a heated outer peripheral ring to an outer periphery of the segment cores. The method also includes reheating the stator at a predetermined temperature in a state where a circularity of the stator is corrected by restraining the outer peripheral ring in the stator to improve the circularity of the stator.

Abstract: For adjusting a positional relationship between a specimen and a probe to measure an electric characteristic of the specimen through a contact therebetween, a base table holding a specimen table holding the specimen and a probe holder holding the probe is positioned at a first position to measure the positional relationship between the probe and the specimen at the first position, and subsequently positioned at a second position to measure the positional relationship therebetween at the second position so that the probe and the specimen are contact each other at the second position, the specimen table and the probe holder are movable with respect to each other on the base table at each of the first and second positions to adjust the positional relationship between the probe and the specimen, and a measuring accuracy at the second position is superior to a measuring accuracy at the first position.

Abstract: A laminated core punching apparatus, configured such that a stator-punching press machine that has a molding die performing a partial punching gradually approaches the shape of the stator core piece. There is a punching die to punching out the stator core piece from a strip-form steel plate, and two stator lamination stations. A rotor-punching press machine and a stator-punching press machine are constructed to operate synchronously. An intermediate loop portion capable of causing a strip-form steel plate to hang down in a loop is provided in order to adjust a length of the strip-form steel plate between the two press machines, and a loop guide portion that guides a loop locus of the strip-form steel plate from above so that the strip-form steel plate does not invert is disposed above the intermediate loop portion to be capable of ascending and descending.

Abstract: A highly reliable cylindrical primary battery is provided where the surface temperature of a body portion of which at the time of a short circuit is controlled to be low. The heat conductivity ? (W/m·K) of a resin sealing body of a sealing assembly having a PTC element and the amount of heat generation Q (W) in the PTC element at the time of tripping are set so that the relational expressions of: 0.12???0.27;??(1) 1.0?Q?1.5; and??(2) Q??3.33?+1.9 are met.

Abstract: An alkaline dry battery according to the invention includes a hollow cylindrical positive electrode mixture including a positive electrode active material; a gelled negative electrode filled into the hollow of the positive electrode mixture and including a negative electrode active material; a separator disposed between the positive electrode mixture and the gelled negative electrode; a negative electrode current collector inserted into the gelled negative electrode; a negative electrode terminal plate electrically connected to the negative electrode current collector; and an electrolyte. The negative electrode current collector includes brass having an average crystal particle size of 0.015 mm or greater.

Abstract: An alkaline battery of the present invention includes a battery case, a power generating element housed in the interior of the battery case, and an assembled sealing part for closing the opening of the battery case. The assembled sealing part includes a resin sealing member. The sealing member includes a central cylindrical portion having a through-hole for inserting a shank of a negative electrode current collector therethrough, a peripheral cylindrical portion interposed between the periphery of the negative electrode terminal plate and the end portion of the opening of the battery case, and a joint portion for joining the central cylindrical portion and the peripheral cylindrical portion. The end portion of the opening of the battery case is curved such that the top of the peripheral cylindrical portion of the sealing member is wrapped therein, and the curved portion is crimped inward so that the periphery of the negative electrode terminal plate is fixed tightly.

Abstract: The present invention provides an alkaline battery which has high reliability and high cost performance and does not cause an internal short circuit resulting from gel leakage even when the filling densities of the positive and negative electrodes are reduced. In the alkaline battery, a positive electrode 2 contains manganese dioxide as a positive electrode active material, a negative electrode 3 is a gel negative electrode containing zinc as a negative electrode active material, a filling density of manganese dioxide in the positive electrode 2 is in a range of 2.31 to 2.45 g/cm3, a filling density of zinc in the negative electrode 3 is in a range of 1.49 to 1.65 g/cm3, and a ratio (h1/h2) between a height of the positive electrode 2 (h1) and a height of the negative electrode 3 (h2) is in a range of 0.96 to 1.06.