Abstract: A semiconductor device includes a first transistor, a first drive circuit including a second transistor, and a second drive circuit including a third transistor. The second transistor and the third transistor are connected in series; and a connection node of the second and third transistors is connected to a gate electrode of the first transistor. The first transistor, the second transistor, and the third transistor are normally-off MOS HEMTs formed in a first substrate that includes GaN. The first drive circuit charges a parasitic capacitance of the first transistor. The second drive circuit discharges the parasitic capacitance of the first transistor.

Abstract: There is provided a liquid container that comprises an upper wall and a bottom wall; a liquid supply port provided in the bottom wall; a first chamber provided on a +Z direction side that is an upper wall side; a second chamber provided on a ?Z direction side that is a bottom wall side; a partition wall configured to part the first chamber from the second chamber; and a connecting hole configured to connect the first chamber with the second chamber. The second chamber is connected with the liquid supply port. The first chamber is connected with the liquid supply port via the connecting hole and the second chamber. The second chamber includes a return flow path that is turned back along an X direction. A liquid contained in the first chamber is flowed from the connecting hole through the return flow path to the liquid supply port.

Abstract: There is provided a liquid container configured to be mounted to a carriage that reciprocates in an X direction. The liquid container comprises an upper wall and a bottom wall; a liquid supply port provided in the bottom wall; a first chamber provided on a +Z direction side that is an upper wall side; a second chamber provided on a ?Z direction side that is a bottom wall side; a partition wall configured to part the first chamber from the second chamber; and a connecting hole configured to connect the first chamber with the second chamber. The second chamber is connected with the liquid supply port. The first chamber is connected with the liquid supply port via the connecting hole and the second chamber. The second chamber includes a return flow path that is turned back along the X direction. A liquid contained in the first chamber is flowed from the connecting hole through the return flow path to the liquid supply port.

Abstract: A paper feeder equipped with copying paper cassettes comprises a cassette-receiving section within the housing of a copying apparatus for mounting thereon a plurality of copying paper cassettes containing sheets of copying paper having different sizes. Each of the paper cassettes includes a main body for holding paper sheets which has an opening formed at the forward end portion of its bottom wall and a bottom plate for placing paper sheets thereon which is mounted on the bottom wall of the main body of the cassette so that it can freely pivot about its rear end portion as a fulcrum. The housing of the coyping apparatus has provided therein a press-contacting mechanism adapted to act on the bottom plate of the cassette through the opening in the main cassette body.

Abstract: A cleaning device in an electrostatic copying apparatus, for removing residual toner particles from the surface of a photosensitive member adapted to move through an endless conveying passage, includes a blade holding mechanism mounted pivotally around an axis extending substantially parallel to the surface of the photosensitive member and substantially perpendicular to the moving direction of the photosensitive member, and a cleaning blade mounted on the blade holding mechanism. The cleaning device further includes a first spring elastically biasing the blade holding mechanism to a non-operating position in which the cleaning blade is away from the surface of the photosensitive member and an operating mechanism selectively positioning the blade holding mechanism against the elastic biasing action of the first spring to an operating position in which the cleaning blade is pressed against the surface of the photosensitive member.

Abstract: A variable magnification electrostatic copying apparatus comprising a transparent plate on which to place a document to be copied, an optical system for projecting the image of the document onto an electrostatographic photosensitive member at any desired projecting ratio selected from a plurality of projecting ratios in an exposure zone located along the moving path of the photosensitive member, and a driving means for moving at least a part of the optical system and the transparent plate relative to each other. The optical system includes at least one position-variable optical element assembly adapted to be held at any of a plurality of positions corresponding to the aforesaid plurality of projecting ratios. The variable magnification electrostatic copying apparatus includes a unique improved means for varying the projecting ratio of the optical system by moving the position-variable optical element assembly.

Abstract: An electrostatic copying apparatus including a support frame having a front support wall and a rear support frame. The support frame is mounted on a housing slidably in the front and rear direction between an operating position within the housing and a pull-out position outside of the housing. A rotating drum and a developing device are mounted on the support frame. Each of the rear surface of the front support wall and the front surface of the rear support wall has a semicircular receiving portion with an open top, and each end of the rotating drum has a shaft bearing member with a circular peripheral surface. By inserting each bearing member into the associated receiving portion, the drum is rotatably mounted. The developing device has a front wall and a rear wall, with a projecting portion formed at the end of each. An abutting lower edge is defined on each projecting portion, and an abutting front edge is defined on each of the front wall and the rear wall, below the projecting portion.

Abstract: A copying apparatus includes a sorter which is arranged to sort a plurality of copy paper sheets corresponding to a single original document, discharged from a main body of the copying apparatus, into a plurality of bins successively shifted to a paper discharge position by a shifting device. The copying apparatus includes a copy number preset key, a memory for memorizing a preset number of copies, a first counter for counting the number of copied paper sheets, a second counter for counting the number of discharged copy paper sheets, a device for stopping the copying operation when the counted value of the first counter agrees with the memorized preset number of copies, and a sort key for selecting a mode for sorting the copy paper sheets into the bins one sheet in each bin. An electrical circuit applies signals to the shifting device in order to change the moving direction of the bins when the counted value of the second counter agrees with the memorized preset number of copies in the sort mode.

Abstract: An optical device in a variable magnification electrostatic copying apparatus includes a first reflecting mirror assembly mounted for reciprocal movement, a second reflecting mirror assembly mounted for reciprocal movement substantially parallel to the reciprocating direction of the first reflecting mirror assembly, and a speed-reduction interlocking mechanism for moving the second reflecting mirror assembly at a speed equal to one-half of the moving speed of the first reflecting mirror assembly, upon movement of the first reflecting mirror assembly. The optical device further includes a magnification setting mechanism for changing the relative position of the second reflecting mirror assembly with respect to the first reflecting mirror assembly according to a desired copying magnification.