Abstract: A sheet ejection mechanism including a sheet ejection roller capable of rotating along a selective direction and having an arc portion and a plane portion, the arc portion and the plane portion forming a D-shape cross-section, and a pinch member configured at a position adjacent to the sheet ejection roller, wherein a recording medium is clamped and conveyed between the pinch member and the arc portion of the sheet ejection roller, and a gap is formed between the plane portion and the pinch member for allowing the recording medium to pass. Also, the present invention provides a duplex sheet feeding system having the sheet ejection mechanism.

Abstract: A depth adjustment device is mounted to a front end of a power tool, having a coupling member fixed to the front end of the power tool, a hollow stationary sleeve, and a hollow adjustment sleeve. The coupling member includes a limit recess and a lock recess at an external periphery thereof. The stationary sleeve is sleeved onto the coupling member, having two first lock portions corresponding to the limit recess, a springy part formed at a rear end thereof, and a second lock portion formed at a distal end of the springy part. The first lock portions are stopped against the lock recess. The second lock portion is locked to the lock recess. The adjustment sleeve includes a lip portion at a front end thereof for lying against a surface of a workpiece and is threadably connected with the stationary sleeve to be movably mounted to the stationary sleeve.

Abstract: A depth adjustment device is mounted to a front end of a power tool, having a coupling member fixed to the front end of the power tool, a hollow stationary sleeve, and a hollow adjustment sleeve. The coupling member includes a limit recess and a lock recess at an external periphery thereof. The stationary sleeve is sleeved onto the coupling member, having two first lock portions corresponding to the limit recess, a springy part formed at a rear end thereof, and a second lock portion formed at a distal end of the springy part. The first lock portions are stopped against the lock recess. The second lock portion is locked to the lock recess. The adjustment sleeve includes a lip portion at a front end thereof for lying against a surface of a workpiece and is threadably connected with the stationary sleeve to be movably mounted to the stationary sleeve.

Abstract: An automatic screw feeding apparatus includes a base assembly, a slide assembly, a first spring, a screw carrier driving device, and a screw carrier guidance device. The slide assembly is mounted to the base assembly, movable forward and backward between a first position and a second position along a straight path. The first spring is mounted between the base and slide assemblies for keeping the slide assembly at the first position. The screw carrier guidance device includes a connection member connected with the base assembly, a guide member mounted to the connection member and movable forward and backward between a third position and a fourth position, and a second spring mounted between the guide and connection members for keeping the guide member located at the third position. The second spring can greatly lighten the load of the first spring to prevent the fed screws from being jammed.

Abstract: A sheet ejection mechanism including a sheet ejection roller capable of rotating along a selective direction and having an arc portion and a plane portion, the arc portion and the plane portion forming a D-shape cross-section, and a pinch member configured at a position adjacent to the sheet ejection roller, wherein a recording medium is clamped and conveyed between the pinch member and the arc portion of the sheet ejection roller, and a gap is formed between the plane portion and the pinch member for allowing the recording medium to pass. Also, the present invention provides a duplex sheet feeding system having the sheet ejection mechanism.

Abstract: A transmission extension adapter for connection between a work head and the chuck of a power hand tool includes a cylindrical cap shell coupled to the power hand tool around the chuck and having radial through holes and a positioning member in each radial through hole. An axle sleeve is rotatably coupled to the cylindrical cap shell and has locating holes on the periphery thereof. A transmission axle is inserted through the axle sleeve and has a rear end connected to the chuck and a front end connected with a supplementary chuck for holding the work head. A front cap assembly is affixed to the front end of the axle sleeve to hold an automatic feeder for allowing rotation of the automatic feeder with the axle sleeve. A multi-angle positioning device is adapted for holding down the positioning members in the locating holes to lock the axle sleeve.

Abstract: A toner fuser includes a pressure roller for pressing toners on a print medium so as to fuse the toners on a print medium, and a rolling heating component for clamping the print medium with the pressure roller and heating the pressure roller. A fusing region is formed between the pressure roller and the rolling heating component. The toner fuser further includes a rolling preheating component installed on a side of the pressure roller for preheating the pressure roller and a part of the print medium not entering into the fusing region.

Abstract: A screw nail magazine for an electric screwdriver includes a fixed holder member, a movable holder member reciprocally moveably mounted inside the fixed holder member, a positioning member fastened to the moveable holder member, and a nailing depth adjustment device. The nailing depth adjustment device has a control member pivotally mounted in the fixed holder member for rotation by a user, a driven member fixedly connected to the control member and located inside the fixed holder member, a slider coupled to the driven member and movable along a fixed path by the driven member actuated by the control member, and a stop block mounted on the slider and stopped at the positioning member for limiting the moving stroke of the moveable holder member inside the fixed holder member.

Abstract: A multi-function printer is provided. A trigger piece is fixed to the first module and stretched into a second module. A wedging piece is disposed in the second module and protruded from the second module. An actuating piece and a join piece are disposed in the second module. The actuating piece has a first end connected to the actuating piece and a second end positioned close to the trigger piece. When the three modules are stacked together, the trigger piece goes against the wedging piece and the actuating piece goes against a third module. When the first module is rotated, the trigger piece is separated from the wedging piece such that the wedging piece can be wedge with the third module. When the second module is rotated, the actuating piece drives the joint piece to wedge with the trigger piece.

Abstract: A screw nail magazine for an electric screwdriver includes a fixed holder member, a movable holder member reciprocally moveably mounted inside the fixed holder member, a positioning member fastened to the moveable holder member, and a nailing depth adjustment device. The nailing depth adjustment device has a control member pivotally mounted in the fixed holder member for rotation by a user, a driven member fixedly connected to the control member and located inside the fixed holder member, a slider coupled to the driven member and movable along a fixed path by the driven member actuated by the control member, and a stop block mounted on the slider and stopped at the positioning member for limiting the moving stroke of the moveable holder member inside the fixed holder member.

Abstract: A power hand tool includes a housing, a motor mounted inside the housing, a transmission member coupled to the motor, a driven member, which has grooves on one side thereof facing the transmission member, a plurality of steel balls respectively mounted in the grooves of the driven member, a plurality of spring members respectively mounted in the transmission member and stopped at the steel balls for enabling the driven member to be rotated by the transmission member upon operation of the motor, and a tool bit adaptor fastened to the driven member.

Abstract: A power hand tool includes a housing for holding a motor therein, a transmission gear set coupled to an output shaft of the motor, a first power transmission member coupled to an output gear of the transmission gear set, a second power transmission member which is rotatably mounted in the housing and coupled to the first power transmission member for synchronous rotation when it is axially inwardly pressed, and a spring member for pushing the second power transmission member away from the first power transmission member for enabling the first power transmission member to run idle.

Abstract: A screw feeder adapter includes a housing having a first connecting portion for connection to a screw feeder, a second connecting portion, and a retaining portion connected between the first connecting portion and the second connecting portion, a coupling member connectable to a power screwdriver and coupled to the second connecting portion of the housing through a rotary motion, and two locking units respectively pivoted to the retaining portion of the housing at two sides and forced by a respective spring member to engage into a respective retaining hole at the housing and a respective retaining groove at the coupling member to lock the coupling member to the housing.

Abstract: A screw feeder adapter includes a housing having a first connecting portion for connection to a screw feeder, a second connecting portion, and a retaining portion connected between the first connecting portion and the second connecting portion, a coupling member connectable to a power screwdriver and coupled to the second connecting portion of the housing through a rotary motion, and two locking units respectively pivoted to the retaining portion of the housing at two sides and forced by a respective spring member to engage into a respective retaining hole at the housing and a respective retaining groove at the coupling member to lock the coupling member to the housing.

Abstract: Systems consistent with the present invention provide an electrophotographic printing apparatus that includes a group of developing units, a photoreceptor belt having an outer surface, and a group of support members operably disposed to support the movement of the photoreceptor belt along a path. The photoreceptor belt has a shape defined, at least in part, by the support members. The shape of the photoreceptor belt has at least two sides meeting at a transfer point. The first of the two sides extends at a first angle from the outer surface of the photoreceptor belt to a horizontal axis of the apparatus at the transfer point and the second of the two sides extends at a second angle from the outer surface of the photoreceptor belt to the horizontal axis such that the first and the second angles are each less than 90°. Each developing unit is disposed adjacent to the first or the second sides of the shape of the photoreceptor belt.

Abstract: A paper feeding mechanism for automatically adjusting paper supply force includes a swing gear assembly, a lifting plate, and a cam. The swing gear assembly provides a driving force for automatic control, turning the cam to lift or lower the lifting plate and paper, and fine-tuning the lifting force for paper supply to avoid paper miss-feeds or multi-feeds.

Abstract: A modified control panel used in office machines, which is disposed on an unfoldable upper cover or an automatic document feeder attached on the upper cover without the need of an extra projective portion for disposition of the control panel. Therefore, the machine volume can be effectively shrunk to meet the requirement of miniaturization without affecting operational convenience, thereby reducing material cost and packaging and transportation cost to enhance the competitive capacity of product. The office machine includes a main body, an unfoldable upper cover connected at the main body, and a control panel disposed at the upper cover.

Abstract: Systems consistent with the present invention provide an electrophotographic printing apparatus that includes a group of developing units, a photoreceptor belt having an outer surface, and a group of support members operably disposed to support the movement of the photoreceptor belt along a path. The photoreceptor belt has a shape defined, at least in part, by the support members. The shape of the photoreceptor belt has at least two sides meeting at a transfer point. The first of the two sides extends at a first angle from the outer surface of the photoreceptor belt to a horizontal axis of the apparatus at the transfer point and the second of the two sides extends at a second angle from the outer surface of the photoreceptor belt to the horizontal axis such that the first and the second angles are each less than 90°. Each developing unit is disposed adjacent to the first or the second sides of the shape of the photoreceptor belt.

Abstract: A modified control panel used in office machines, which is disposed on an unfoldable upper cover or an automatic document feeder attached on the upper cover without the need of an extra projective portion for disposition of the control panel. Therefore, the machine volume can be effectively shrunk to meet the requirement of miniaturization without affecting operational convenience, thereby reducing material cost and packaging and transportation cost to enhance the competitive capacity of product. The office machine comprises a main body, an unfoldable upper cover connected at the main body, and a control panel disposed at the upper cover.

Abstract: A circuit for enhancing scan testing capability of a digital IC tester. The circuit is connected between the digital IC tester and a DUT.