Abstract: In a toner comprising toner particles which comprise toner base particles containing at least a binder resin and a magnetic material, and inorganic fine particles, the toner base particles have been obtained through a pulverization step; and, the toner base particles having a circle-equivalent diameter of from 3 ?m or more to 400 ?m or less as measured with a flow type particle image analyzer have an average circularity of from 0.935 or more to less than 0.970; and the toner base particles have an average surface roughness of from 5.0 nm or more to less than 35.0 nm as measured with a scanning probe microscope. The toner can enjoy less toner consumption per sheet of images, can achieve a long lifetime in a smaller quantity of toner, and has superior developing performance in any environment.

Abstract: In a motor rotation rate detecting circuit incorporating a conventional differentiating circuit, raising the upper limit of the differentiating operation frequency of the differentiating circuit to cope with an increased range of the motor rotation rate causes the differentiating circuit to amplify high-frequency noise when the motor is rotating at a low rate. To solve this problem, a motor rotation rate detecting circuit embodying the invention incorporates a differentiating circuit that produces a rotation rate detection signal by differentiating a plurality of alternating signals having different phases that are output according to the rotation position of the motor, and the frequency response of the differentiating operation of the differentiating circuit is switchable according to the voltage of the rotation rate detection signal.

Abstract: A radiation-sensitive resin composition comprising (A) an alkali-soluble resin having an unsaturated group, (B) a compound having at least one ethylenically unsaturated double bond, and (C) a radiation-induced radical polymerization initiator, wherein:

Abstract: The die casting machine 1 comprises: a metallic mold 2 including a product cavity section 21 for forming a die casting product 8, a plunger sleeve section 22 and a runner 23; a decompressing device 4 for decompressing the inside of the metallic mold 2; a powder supply source 5 for supplying a powder mold releasing agent 6 into the metallic mold 2; and a powder discharging pin 3 arranged in the runner 23 in a retractable condition. The powder discharging pin 3 includes: a first opening section 311 to open the powder introducing passage 31, which is connected with the powder supply source 5, to the product cavity section 21 and a second opening section 312 to open the powder introducing passage 31 to the plunger sleeve section 22, when the powder discharging pin 3 advances into the runner 23.

Abstract: Fluid pressure of a first fluid chamber of a driving means, which acts as a back pressure, is monitored by a monitoring means when a core pin is driven by the driving means in an inserting direction before injection of a molten material into a cavity of a die arrangement. When the monitored fluid pressure of the first fluid chamber exhibits abnormal behavior that is different from normal behavior observed during a normal period, the monitoring means controls the driving means to stop the driving of the core pin in the inserting direction.

Abstract: The invention provides a stick-shaped cosmetic screw-out container including a holding cylinder fitting and holding a stick-shaped cosmetic and having a screwing projection provided from a side wall. The container also includes a shell cylinder including the holding cylinder vertically slidably, having a guide groove through which the screwing projection penetrates provided on a side wall and having an engagement concave portion provided on a lower side wall. The container further includes a sleeve fitted in the shell cylinder, having a screwing groove for screwing the screwing projection provided on an inner wall and having, on a lower inner wall, an inner peripheral rib engaged rotatably with the engagement concave portion so as not to be dropped out, a body cylinder for holding a lower portion of the shell cylinder so as not to be dropped out, and a fitting cylinder fixed onto the body cylinder and provided with a fitting portion in which a cap is removably fitted.

Abstract: In a motor rotation rate detecting circuit incorporating a conventional differentiating circuit, raising the upper limit of the differentiating operation frequency of the differentiating circuit to cope with an increased range of the motor rotation rate causes the differentiating circuit to amplify high-frequency noise when the motor is rotating at a low rate. To solve this problem, a motor rotation rate detecting circuit embodying the invention incorporates a differentiating circuit that produces a rotation rate detection signal by differentiating a plurality of alternating signals having different phases that are output according to the rotation position of the motor, and the frequency response of the differentiating operation of the differentiating circuit is switchable according to the voltage of the rotation rate detection signal.

Abstract: A die casting machine includes vacuum tank 26 and vacuum pump 27 that together evacuate the inside of a mold cavity 40 to a first degree of vacuum, and vacuum tank 21 and vacuum pump 22 that together evacuate the cavity to a second degree of vacuum higher than the first degree of vacuum. The cavity 40 is connected to vacuum tanks 21 and 26 for evacuating the cavity 40 through an evacuation passage 17. When solenoid valves 19 and 24 open and the cavity is evacuated, a powder mold releasing agent is supplied by a powder feeding apparatus 30 into the cavity 40. Filters 20 and 25 each having a filter diameter smaller than a mean grain diameter of the powder mold releasing agent are interposed between the solenoid valves 19, 24 and the vacuum tanks 21, 26, respectively. When the vacuum tanks 21 and 26 evacuate the cavity 40, filters 20 and 25 capture the major proportion of the powder mold releasing agent, and the occurrence of trouble in the vacuum tanks, etc, can be prevented.

Abstract: The die casting machine 1 comprises: a metallic mold 2 including a product cavity section 21 for forming a die casting product 8, a plunger sleeve section 22 and a runner 23; a decompressing device 4 for decompressing the inside of the metallic mold 2; a powder supply source 5 for supplying a powder mold releasing agent 6 into the metallic mold 2; and a powder discharging pin 3 arranged in the runner 23 in a retractable condition. The powder discharging pin 3 includes: a first opening section 311 to open the powder introducing passage 31, which is connected with the powder supply source 5, to the product cavity section 21 and a second opening section 312 to open the powder introducing passage 31 to the plunger sleeve section 22, when the powder discharging pin 3 advances into the runner 23.

Abstract: At least one of a holding cylinder 2 holding a stick-shaped cosmetic 1, a shell cylinder 4 accommodating the holding cylinder 2 and a sleeve 13 held on the outer periphery of the shell cylinder 4 is formed of a different material, a lower portion of the shell cylinder 4 is coupled to a body cylinder 14 unrotatably and removably so as not to be dropped out, the shell cylinder 4 is divided into an upper shell cylinder 4a and a lower shell cylinder 4b, the upper shell cylinder 4a is provided with a guide groove 5 through which a screwing projection 3 of the holding cylinder 2 penetrates, a pair of window portions 34 are provided in the vicinity of a lower end in a horizontal direction, a tongue piece-shaped inserting portion 8 entering from the lower end of the upper shell cylinder 4a is linked to the lower shell cylinder 4b, a hook 32 is protruded from the window portion 34 to the outside over a side wall of a tip portion of the inserting portion 8, one of end faces of the hook 32 is cut like a taper to constit

Abstract: A lapping composition which contains abrasive grains which are commercially available and which consists of plate alumina-powder prepared by milling and class:trying a sintered body of plate alumina obtained by calcinating aluminum hydroxide, and other plate alumina powder classified and prepared separately from but similarly to the first-mentioned plate alumina powder having average grain size which is in a range of from 1.3 times to 2.3 times as large as the average grain size of the first-mentioned plate alumina powder. Further provided is a lapping method with such a lapping composition by which the removal rate is improved and a lapped surface excellent in quality can be obtained.

Abstract: Proposed is a novel face coat composition having improved stability used in the preparation of a shell-like casting mold for a high melting point metal or alloy by the lost-wax mold method by forming a face coat layer on a wax model using the composition and further forming a backup coat layer thereon followed by removal of the wax by melting and calcination of the shell-like mold formed from the layers. The face coat composition comprises a rare earth oxide powder as the refractory constituent and a binder which is a synthetic resin in the form of an aqueous emulsion, a water-soluble organic polymer in the form of an aqueous solution, a sol of an inorganic oxide such as aluminum oxide, silicon dioxide and zirconium oxide or a combination thereof. A small amount of a powder of rare earth glass can be admixed to the composition so that the face coat layer formed from the face coat composition may have still improved properties.

Abstract: A sealing device to be applied between a piston and a cylinder of a disk brake on an automobile. The sealing device comprises an annular seal groove provided in the inner surface of the cylinder and a seal ring inserted in the seal groove, the seal groove having a beveled wall between its front and bottom walls, the seal ring having a beveled surface provided between its front and outer surfaces and engageable with the beveled wall of the seal groove, the seal ring being compressed into the seal groove by the piston with a space between the front surface of the seal ring and the front wall of the seal groove. When the piston of the disk brake is activated hydraulically, the seal ring is elastically deformed with the movement of the piston to build up elastic energy. When the piston is set free from the hydraulic pressure, the piston returns easily to its original position by means of the elastic energy built up in the seal ring.