Abstract: A controller includes a key top, a substrate, and an elastic member. The elastic member includes a pressed portion, a base, a skirt portion, and a pressing member. The substrate includes a contact. When viewed in the first direction, the pressing member is surrounded by an outer peripheral edge of a prescribed region. In the second direction, a distance between an end of the outer peripheral edge of the prescribed region on a side of a swing center of the key top and an end of a top surface on the side of the swing center is longer than a distance between an end of the outer peripheral edge of the prescribed region opposite to the swing center and an end of the top surface opposite to the swing center. In the second direction, the contact is located closer to the swing center than the top surface.

Abstract: According to an embodiment, a liquid dispensing head includes a nozzle plate with a plurality of nozzles and a plurality of pressure chambers respectively communicating with the nozzles. A vibration plate is on a side of the pressure chambers opposite the nozzle plate. A supply-side flow path for liquid to be dispensed from the nozzle is on an inlet side of the plurality of pressure chambers. A discharge-side flow path for the liquid is on an outlet side of the pressure chambers. Piezoelectric elements are positioned to vibrate the vibration plate to change a volume of the pressure chambers for ejecting (dispensing) the liquid from the plurality of nozzles. The supply-side flow path is set to have a flow path resistance that is the same as a flow path resistance of the discharge-side flow-path.

Abstract: A cyclone type cylindrical body 10 having a part whose diameter decreases in the direction toward a lower opening from an upper opening is used, and liquid is made fall in the inside of the cylindrical body 10 while swirling and thereby accelerated to form a vortex flow. Fine particles are charged into the center of the vortex flow so as to be wrapped by the vortex flow, and thereby the both are mixed. By this characteristic, the fine particles do not contact with an inner wall of the cylindrical body, and therefore clogging does not occur in the cylindrical body. Moreover, the pressure around the center of the vortex flow becomes negative, and the fine particles are aspirated. Therefore, dust is hardly generated. Thus, a mixing apparatus of a small size that can slurry fine particles without much maintenance cost can be provided.

Abstract: A cyclone type cylindrical body 10 having a part whose diameter decreases in the direction toward a lower opening from an upper opening is used, and liquid is made fall in the inside of the cylindrical body 10 while swirling and thereby accelerated to form a vortex flow. Fine particles are charged into the center of the vortex flow so as to be wrapped by the vortex flow, and thereby the both are mixed. By this characteristic, the fine particles do not contact with an inner wall of the cylindrical body, and therefore clogging does not occur in the cylindrical body. Moreover, the pressure around the center of the vortex flow becomes negative, and the fine particles are aspirated. Therefore, dust is hardly generated. Thus, a mixing apparatus of a small size that can slurry fine particles without much maintenance cost can be provided.

Abstract: Provided herein are a method and an apparatus for examining foreign matters in through holes, which can quickly conduct an examination of foreign matter in through holes with low costs and high accuracy. Light passing through a plurality of through holes having a uniform size is simultaneously taken as image data, the number of areas of the imaged masses corresponding to the plurality of the respective through holes is initially counted, and a process to determine presence or absence of foreign matters is conducted by mutually comparing areas of adjacent masses for only a work piece with a counted value of the masses being concurred with a specified value.

Abstract: A method and an apparatus for examining foreign matters in through holes includes a light source provided on one side and a line sensor camera provided on the other sides, whereby the light source and sensor camera cooperate to inspect a work piece having a plurality of through holes. A parallel displacement system is provided to translate the work piece and the line sensor camera relative to each other to allow the line sensor camera to detect light passing through the plurality of through holes in one lot. An image processing device and determination device are also provided to determine whether foreign matters are present in the through holes based on deviations among receiving light regions corresponding to the respective through holes.

Abstract: A method for managing an apparatus for examination of foreign matters in through holes is provided which can readily judge the presence or absence of a change in the examination conditions in the apparatus for examining foreign matters in through holes, and efficiently conduct a management of the apparatus.

Abstract: Provided herein are a method and an apparatus for examining foreign matters in through holes, which can quickly conduct an examination of foreign matter in through holes with low costs and high accuracy. Light passing through a plurality of through holes having a uniform size is simultaneously taken as image data, the number of areas of the imaged masses corresponding to the plurality of the respective through holes is initially counted, and a process to determine presence or absence of foreign matters is conducted by mutually comparing areas of adjacent masses for only a work piece with a counted value of the masses being concurred with a specified value.

Abstract: It is an object to provide a method for managing an apparatus for examination of foreign matters in through holes, which can readily judge the presence or absence of a change in the examination conditions in the apparatus for examining foreign matters in through holes, and efficiently conduct a management of the apparatus.

Abstract: Provided herein are a method and an apparatus for examining foreign matters in through holes, which can quickly make determinations with low costs and high accuracy. An apparatus is equipped with a light source 12 provided on one side and a line sensor camera 14 (or an area sensor) provided on the other side with a work piece 10 having a plurality of through holes being placed between them. A parallel displacement system (XY table 16) is provided to translate the work piece and the line sensor camera relative to each other to allow the line sensor camera to detect light passing through the plurality of through holes in one lot, and an image processing device 24 is provided to receive detected signals provided by the line sensor camera to obtain a plurality of binary image data corresponding to the plurality of through holes in the work piece.

Abstract: There are provided a method and apparatus for examining through holes, in which determinations as to whether the examined through hole are good or bad can be accurately made at low costs. A light source and a sensor camera having a plurality of imaging elements are disposed with a table on which a work piece having through holes is mounted being interposed between the light source and the sensor camera. Light passing through the through holes is imaged by the sensor camera, wherein the sensor camera is set such that a focal point of the sensor camera is shifted from the surface of the work piece to thereby apparently expand an area of the image of the passing light.

Abstract: A trioxane polymer is continuously produced with a continuous stirring-mixing apparatus. The apparatus includes two mutually parallel rotational shafts, a large number of paddles mounted on each rotational shaft and a barrel having an inside wall surface along the circular surface traced by the respective paddles, as they rotate. Thus, the barrel has a cross-section in the shape of two circles concentric with the two rotational shafts, which overlap each other. The apparatus is also provided with a temperature controlling jacket.