Abstract: A paper feeding device includes a cover, a base, a pickup roller assembly and at least one paper blocking unit. The paper blocking unit is placed beside the pickup roller assembly, has a paper blocking element and a projection projecting from the upper portion of the side wall of the pickup roller assembly. The paper blocking element includes a connecting portion, a paper blocking arm, a pivot rotatablely connecting the cover. A connecting arm extends upwards from the end of the pivot, a blocking portion projects from the outer side of the connecting arm, a passage is formed between the blocking portion and the connecting arm. The projection can be downward against the blocking portion of the paper blocking element or pass through the passage of the paper blocking element to allow the paper to be fed in, so the cooperation is easy, the paper feeding device works smoothly.

Abstract: A paper-releasing mechanism includes a paper-feeding device for feeding papers, a supporting shelf arranged under the paper-feeding device, a driving roller and an idle roller arranged in the front of the paper-feeding device and an elastic unit engaged with the idle roller and the supporting shelf. The elastic unit includes a connecting arm, act arms bending from the ends of the connecting arm respectively, two helixes each of which extends from the act arm and forms an aperture and two follow act arm each of which extends from the helix and forms a ring at the end thereof, the ring being sleeved on the rolling pivot of the idle roller, the apertures being sleeved on a pivot formed on the supporting shelf.

Abstract: A paper feeding device includes a cover, a base, a pickup roller assembly and at least one paper blocking unit. The paper blocking unit is placed beside the pickup roller assembly, has a paper blocking element and a projection projecting from the upper portion of the side wall of the pickup roller assembly. The paper blocking element includes a connecting portion, a paper blocking arm, a pivot rotatablely connecting the cover. A connecting arm extends upwards from the end of the pivot, a blocking portion projects from the outer side of the connecting arm, a passage is formed between the blocking portion and the connecting arm. The projection can be downward against the blocking portion of the paper blocking element or pass through the passage of the paper blocking element to allow the paper to be fed in, so the cooperation is easy, the paper feeding device works smoothly.

Abstract: A sheet-handling apparatus includes a base, a second motor and a sheet-fetching assembly driven by the second motor. The sheet-fetching assembly has a passive gear and a floating gear. When the passive gear rotates, the floating gear revolves around the passive gear. A plurality of driving rollers are driven by a first motor. A plurality of driven rollers are driven by driving rollers, respectively. A prop assembly includes a brace arranged in the base, a prop axel engaged in the brace, a twist arm fixed at the prop axel and having a plurality of teeth for contacting with the floating gear, a swimming arm sleeved and firmly engaged with the swimming arm and a spring component installed on a support board of the swimming arm. The passive gear drives the floating gear descending and ascending. There are two motors provided in the sheet-handling apparatus in order to simplify the structure of the sheet-handling apparatus.

Abstract: An inkjet printer with double-side printing function includes a base, a guided component located in the base and a cover covered on the base and the guided component. A second path is located between the base and the guided component. A second path exit is located in the end of the second path, and a second path entrance is located in the front of the second path. A redirector is located nearby the second path exit. A first path is located between the base and the cover and between the guided component and the cover. The second path exit and the second path entrance pass through the first path. A print apparatus is located in the cover. The print apparatus has a print head. The print head is located between the printed driving roller and the second path entrance.

Abstract: A paper-releasing mechanism includes a paper-feeding device for feeding papers, a supporting shelf arranged under the paper-feeding device, a driving roller and an idle roller arranged in the front of the paper-feeding device and an elastic unit engaged with the idle roller and the supporting shelf. The elastic unit includes a connecting arm, act arms bending from the ends of the connecting arm respectively, two helixes each of which extends from the act arm and forms an aperture and two follow act arm each of which extends from the helix and forms a ring at the end thereof, the ring being sleeved on the rolling pivot of the idle roller, the apertures being sleeved on a pivot formed on the supporting shelf.

Abstract: A sheet-handling apparatus includes a base, a second motor and a sheet-fetching assembly driven by the second motor. The sheet-fetching assembly has a passive gear and a floating gear. When the passive gear rotates, the floating gear revolves around the passive gear. A plurality of driving rollers are driven by a first motor. A plurality of driven rollers are driven by driving rollers, respectively. A prop assembly includes a brace arranged in the base, a prop axel engaged in the brace, a twist arm fixed at the prop axel and having a plurality of teeth for contacting with the floating gear, a swimming arm sleeved and firmly engaged with the swimming arm and a spring component installed on a support board of the swimming arm. The passive gear drives the floating gear descending and ascending. There are two motors provided in the sheet-handling apparatus in order to simplify the structure of the sheet-handling apparatus.

Abstract: A flat bed scanner having a transparent platform and a scanning mechanism is provided in the present invention. The transparent platform is used to support the objects that wait for scanning. The scanning mechanism is movably placed under the transparent platform along the length direction of the transparent platform. The scanning mechanism includes a plurality of LEDs, a camera lens and a CCD. The LEDs are arranged in a line along the width direction of the transparent platform. The scanning mechanism further includes a diffuser that is placed over the LEDs and has the same width with the transparent platform, and the diffuser diffuses the light beams radiated from the LEDs and then projects the light beams being diffused over the objects that wait for scanning.

Abstract: A sheet separator for an automatic document feeder of the invention is capable of separating an outmost sheet from a stack. The separator includes a separating roller driven by a driving device, a friction roller, a first shaft, and a force-applying mechanism for pushing the separating and friction rollers against each other. The friction roller has a first rotating state, in which the friction roller is driven by the separating roller, a stationary state when the separating roller feeds a first sheet, and a second rotating state, in which the friction roller is driven by a second sheet fed by the separating roller. The first shaft is inserted into the friction roller to provide a damping torque for stopping the rotation of the friction roller.

Abstract: A sheet separator for an automatic document feeder of the invention is capable of separating an outmost sheet from a stack. The separator includes a separating roller driven by a driving device, a friction roller, a first shaft, and a force-applying mechanism for pushing the separating and friction rollers against each other. The friction roller has a first rotating state, in which the friction roller is driven by the separating roller, a stationary state when the separating roller feeds a first sheet, and a second rotating state, in which the friction roller is driven by a second sheet fed by the separating roller. The first shaft is inserted into the friction roller to provide a damping torque for stopping the rotation of the friction roller.