Abstract: The present invention provides a process cartridge removably mounted to an electrophotographic image forming apparatus. The process cartridge includes; a cartridge frame, an electrophotographic photosensitive member provided within the cartridge frame, a process device for acting on the electrophotographic photosensitive member, a memory device for storing information to be transmitted to the electrophotographic image forming apparatus, a positioning portion for positioning the cartridge frame with respect to the image forming apparatus when the process cartridge is mounted to the image forming apparatus, and an exposure opening provided in the cartridge frame and to pass information light from the image forming apparatus to be illuminated on the electrophotographic photosensitive member when the process cartridge is mounted to the image forming apparatus.

Abstract: In a developing unit used for an image forming apparatus to develop an electrostatic latent image on an image carrier, there are provided a developing agent carrying member for carrying a developing agent, a magnet roll disposed in the developing agent carrying member and a supporting member for supporting the magnet roll. A portion of the supporting member is melted so that a central shaft of the magnet roll is welded to the supporting member to attain fixation between the magnet roll and the supporting member.

Abstract: A method for reconditioning a development roller includes a roller portion for conveying developer, and a plastic flange portion connected to one end of the roller portion to transmit a driving force; wherein after the flange portion and roller portion are separated, a part of the roller portion, which is deformed is removed, and a flange portion, which is longer in the axial direction of the roller portion than the separated flange portion, is joined with said separated and shortened roller portion.

Abstract: A piezo-electric device such as a piezo bimorph device includes an intermediate plate, a plate-shaped first piezo ceramic element fixed on one surfaces of the intermediate plate, a plate-shaped second piezo ceramic element fixed on the other surface of the intermediate plate, and a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element. The intermediate plate is made of a hardened tool steel containing carbon from 0.6 to 1.5%, or a fine ceramic material.

Abstract: A piezo-electric device such as a piezo bimorph device includes an intermediate plate, a plate-shaped first piezo ceramic element fixed on one surfaces of the intermediate plate, a plate-shaped second piezo ceramic element fixed on the other surface of the intermediate plate, and a lead wire for connecting the first piezo ceramic element with the second piezo ceramic element. The intermediate plate is made of a hardened tool steel containing carbon from 0.6 to 1.5%, or a fine ceramic material.

Abstract: A position adjustment device employs a holder on which a semiconductor wafer is attached. When placed on a surface plate, the wafer holder is turned upside-down, so that unlocked leg rods and the pattern transfer surface of the wafer are in direct contact with a reference surface of the plate. Piezoelectric elements are embedded in the holder as locking mechanism for the movable leg rods. In response to a variable DC voltage supplied by a voltage generating circuit, the piezoelectric elements deform to lock the rods with high accuracy.

Abstract: According to an image pickup device, a swing-driver unit is provided for vibrating an image sensor unit, thereby causing the image sensor unit to perform an image pickup operation in such a manner as to periodically shift to different sampling positions at different time points in one frame period. The swing-driver comprises a pair of plate-like bimorph piezoelectric elements for stably supporting the image sensor unit. The image sensor unit and the piezoelectric elements are sealed in a ceramic frame body in a compact manner. The electrical connection between the image sensor unit and lead wires formed on the frame is performed by a flexible film connector. The electrical connection between the piezoelectric elements and the lead wires is performed by wiring patterns preformed on the frame.

Abstract: A solid state image-sensing device is disclosed which includes a base board fitted with a plurality of connection pins, an interline transfer charge coupled device (IT-CCD) serving as an area sensor, and a pair of bimorph piezoelectric vibrating elements which jointly vibrate to periodically vibrate the IT-CCD relative to an incoming image light in a plane substantially parallel with the surface of the base board, and wherein the piezoelectric vibrating elements are elastically held above the base board by support plates having a spring action, thereby efficiently vibrating the IT-CCD.

Abstract: A piezoelectric displacing device includes a plurality of longitudinal effect-type piezoelectric displacing members arranged juxtaposed to each other such that displacement axes thereof are substantially parallel to each other, each of said piezoelectric displacing member converting a voltage applied thereto to a mechanical displacement. Connectors are provided which mechanically connect the piezoelectric displacing members in series with each other and derive a sum of amounts of displacement of the piezoelectric displacing members along the displacement axes thereof to give an amount of displacement of the device.

Abstract: A gas combustion apparatus is disclosed wherein an oxygen sensor having electrodes on both surfaces of a base body is fixed in advance at a position such that the oxygen sensor is within the exhaust gas a combustion flame under normal conditions and a combustion flame under oxygen deficiency conditions is brought into contact with only the measuring side electrode. The oxygen sensor is preferably mounted to a heat-resistance holder having an opening such that the measuring side electrode corresponds with the opening.

Abstract: A piezoelectric oxide material suitable for an ultrasonic probe is provided. The piezoelectric material has the general formula ##EQU1## wherein 0.01.ltoreq.X.ltoreq.0.10 and 0.20.gtoreq.a.ltoreq.0.35, to which is added, as an additive, 0.05 to 2.0% by weight of at least one of MnO, NiO and Fe.sub.2 O.sub.3 based on the total content of the basic composition; the thickness coupling factor (Kt) is 50% or more; the ratio (Kt/Kp) of the thickness coupling factor (Kt) to the planar coupling factor (Kp) is 10 or more.