Abstract: A sheet feeding device includes a sheet support, a restricting portion, a displacement section, and a link section. The restricting portion slides along a line passing through restricting points. The restricting portion restricts the position of the sheet when the restricting portion is positioned at each of the restricting points. The link section interlinks the restricting portion and the displacement section. The position of the displacement section is detected. The link section, which interlinks the restricting section and the displacement section, is configured to change a ratio of a distance that the displacement section travels as the restricting section travels a fixed distance, wherein the ratio of the distance between those restricting points which define a relatively large spacing therebetween becomes longer than the ratio of the distance between those restricting points which define a relatively small spacing therebetween.

Abstract: A rotary electric machine integrated with a control device includes stator current switching circuit sections, each of which has a switching element disposed on a heat sink; a field current switching circuit section; a control circuit section which controls the stator current switching circuit sections and the field current switching circuit section; and a case which contains the stator current switching circuit sections and has suction holes each for a cooling air inflow, the heat sinks of three phases for the stator current switching circuit sections being disposed in a circumferential direction of the rotary electric machine. In the rotary electric machine, of the suction holes of the case, an area of the suction hole for the heat sink of the phase disposed in the midst is set to be larger than an area of the suction hole of other phase.

Abstract: A resin bobbin is mounted to a pole core by fitting a body portion thereof over first and second boss portions. A rotor coil is configured by winding a conducting wire onto the bobbin, and an output wire of the conducting wire that is led out from the wound portion is wound doubly onto an output wire securing portion of the bobbin. An edge portion of a radially-outermost surface of the output wire securing portion near the body portion is placed in contact with an inner circumferential wall surface of a first claw-shaped magnetic pole portion.

Abstract: A paper feeder comprises an acquiring device, a driving roller, driven rollers, a driven roller supporter, a driver, and a controller. The acquiring device acquires thickness information on a sheet of paper. The driving roller rotates by being supplied with torque. The driven rollers rotate with the driving roller when in compressive contact with the driving roller. The driven roller supporter so supports the driven rollers that each of them can rotate under a different rotational load. The driver changes the position of the driven roller supporter relative to the driving roller. The controller selects one of the driven rollers on the basis of the thickness information and so activates the driver as to bring the selected roller into compressive contact with the driving roller.

Abstract: A paper feeding device 200 provided in an image forming apparatus 1A according to one embodiment of the present invention is provided with a loading member 201 in which sheets P can be stacked and a central bending section 210 configured to upwardly raise a sheet transport direction X central area P2 of the sheet P for sheets P stacked in the loading member 201.

Abstract: A shifting mechanism includes a guide plate, a bearing, a rotating shaft, a delivery roller, and a bearing unit. The shifting mechanism delivers a sheet of paper along a delivery passage and offsets the sheet horizontally and perpendicularly to the passage while delivering it. The guide plate has an opening forming part of the delivery passage and an end hole formed through the front end of the plate horizontally and perpendicularly to the passage. The rotating shaft extends through the end hole. The delivery roller is fixed to the rotating shaft. The sheet passes through the nip between the delivery roller and the guide plate. The bearing unit extends movably through the end hole and includes a sleeve, which supports the rotating shaft horizontally and perpendicularly to the delivery passage. The bearing unit rotates the rotating shaft.

Abstract: In a fixing device, a heat roller and a fixing gear for rotating the heat roller are arranged concentrically, and coupled to each other by inserting a key formed in the fixing gear into a keyway formed in the heat roller. The keyway is designed such that the key is allowed to move along a direction in which the heat roller is rotated. For example, the keyway is formed by notching a free end of a one-side rotary shaft of the heat roller so as to extend along the direction in which the heat roller is rotated.

Abstract: In a fixing unit, a fixing roller is rotated under driving force transmitted from a paper discharge unit-side gear of a driving section via a fixing roller driving gear, and holds and conveys a recording medium in cooperation with a pressure roller in a nip region. When a control section determines that acceleration conditions are fulfilled, the driving section increases the rotating speed of the paper discharge unit-side gear so that it is rotated at higher speed than before-acceleration speed over predetermined high-speed rotating period.

Abstract: To provide a fusing unit including a fusing roller for fixing an unfixed toner image to a sheet and a fusing roller cleaning unit including a web sheet delivering roller for supplying a web sheet and a winding roller for taking up the web sheet for cleaning the fusing roller, the fusing roller cleaning unit includes a web detecting terminal for detecting the presence of the web sheet and a tension roller for guiding the web sheet, on the upstream side of a pressure roller with respect to the web sheet's direction of conveyance and first and second guide rollers, the second guide roller being disposed upstream of the web detecting terminal.

Abstract: A manual sheet feeding mechanism adapted for use in a sheet processing apparatus includes a manual feeding tray and a guiding member. The manual feeding tray is adapted to be mounted on a side wall of the apparatus so as to be pivotable about an axis between an open position and a closed position. The manual feeding tray has a placement surface for placing a sheet to be manually fed into the apparatus. The guiding member is adapted to position a sheet placed on the placement surface and is provided so as to be movable on the placement surface. The manual sheet feeding mechanism also includes a moving member that is adapted, when the manual feeding tray is pivoted toward the closed position, to move the guiding member on the placement surface.

Abstract: A line sensor that detects the edge position of a recording paper is provided on the upstream side of a transfer point where an image formed on a first photosensitive drum is transferred to the recording paper. When performing borderless image formation, the size of the image on the first photosensitive drum to be transferred to the midstream of the recording paper after detection of its edge position is changed to a smaller size based on the detection results by the line sensor, and subsequent image formation to the recording paper continues to be performed according to this image on the photosensitive drum whose size has been changed.

Abstract: When two or more sheets of paper P are fed in an overlapped manner to a nip where a paper feed roller and a separation roller are in pressure contact with each other, a sub-CPU of a sheet feeding unit rotates the paper feed roller in a paper feeding direction and rotates the separation roller in a direction opposite to the feeding direction, so as to separate overlapping, and thereafter, it rotates the paper feed roller and the separation roller again in the feeding direction.

Abstract: Stator terminals are fastened between head portions and coupling seats in a state of surface contact by screwing relay members onto external screw thread portions of output terminal bolts. Three-phase wire terminals are fastened in a state of surface contact to end surfaces of the relay members at opposite ends from the coupling seats by screwing nuts onto the external screw thread portions of the output terminal bolts. In addition, insulating tubes are interposed between the relay members and extraction apertures so as to cover outer sides of the relay members.

Abstract: An alternating-current dynamoelectric machine according to the present invention includes: a stator including: a stator core in which slots that extend in an axial direction are formed on an inner side; and a stator winding that is mounted to the stator core by winding conducting wires into the slots; and a rotatable rotor including: a field winding that is disposed inside the stator; a rotor core constituted by a first pole core and a second pole core that each have claw-shaped magnetic poles that are disposed so as to cover the field winding and that alternately intermesh with each other; and first and second permanent magnets that are respectively disposed on two facing side surfaces of adjacent claw-shaped magnetic poles and that have magnetic fields that are oriented so as to reduce leakage of magnetic flux between the claw-shaped magnetic poles, and a magnetic body is disposed between a pair of the first and second permanent magnets.

Abstract: A projected shape of permanent magnets is contained within a plane of projection formed by adjacent claw-shaped magnetic poles overlapping when the claw-shaped magnetic poles are viewed in a direction of rotation of a rotor, and is generally similar in shape to a shape of the plane of projection.

Abstract: A composition exhibiting significantly increased luminance as compared with that of a known luminescent composition is provided. The composition constitutes a system in which chemiluminescence is effected by mixing two types of compositions and includes a composition A in which an oxalic ester is present in a solid state in a solution containing the oxalic ester and a luminescent substance both dissolved therein and a composition B in which aqueous hydrogen peroxide and a catalyst is dissolved in a solution.

Abstract: A feeding device according to the present invention holds a pile of sheets of paper in it. Feed force so acts selectively on a specified region of the upper side of the held top sheet as to feed the held sheets one after one in a feed direction. The feeding device includes a flat press plate and a support. The press plate is not smaller in the feed direction and the cross directions perpendicular to the feed direction than the maximum size of the sheets which can be held in the main body. The press plate is not larger in the feed and cross directions than the inner size of the main body. The press plate has a first opening formed over the specified region. The press plate is supported vertically movably above the held sheets by the support.

Abstract: The dynamoelectric machine includes: a Lundell rotor that has: a pole core in which tapered claw-shaped magnetic pole portions are arranged in rows circumferentially so as to extend axially alternately from two axial ends and intermesh with each other; and a field coil that is mounted to the pole core; and a stator that has: a cylindrical stator core that surrounds the rotor so as to have a predetermined air gap; and a stator coil that is mounted to the stator core. The stator core is prepared by laminating and integrating dull finish magnetic steel plates, and a space factor of an iron portion in the stator core is in a range of 96 percent plus or minus 0.5 percent.

Abstract: An alternating-current dynamoelectric machine according to the present invention includes: a stator including: a stator core in which slots that extend in an axial direction are formed on an inner side; and a stator winding that is mounted to the stator core by winding conducting wires into the slots; and a rotatable rotor including: a field winding that is disposed inside the stator; a rotor core constituted by a first pole core and a second pole core that each have claw-shaped magnetic poles that are disposed so as to cover the field winding and that alternately intermesh with each other; and first and second permanent magnets that are respectively disposed on two facing side surfaces of adjacent claw-shaped magnetic poles and that have magnetic fields that are oriented so as to reduce leakage of magnetic flux between the claw-shaped magnetic poles, and a magnetic body is disposed between a pair of the first and second permanent magnets.

Abstract: A feeding device according to the present invention includes a box, paper holders, and a shifting mechanism. The box is open at Its top. The paper holders are open at their tops and positioned in the box. Each of the paper holders holds a pile of sheets of paper in it. The shifting mechanism so shifts at least one of the paper holders that the top sheet in one of the paper holders is positioned in a single freed position in the box according to selection data output from the apparatus with which the feeding device is used.