Abstract:
An image correction device includes an input tray, a pickup roller, a separation roller, a plurality of first and second feed rollers, a scanning area, a sensor unit, a control unit, a plurality of paper-out rollers and a paper-out tray. The control unit electrically connects with the sensor unit and controls rotating speeds of the first and second feed rollers. An image correction method of image correction device is described hereinafter. When the paper is going to pass through the scanning area, the sensor unit sends a first signal to the control unit, when the sensor unit detects a transmitting status or a transmitting speed of the paper to be changed, the sensor unit sends a second signal to the control unit for modulating rotating speeds of the first and second feed rollers and the transmitting speed of the paper until the paper is scanned completely.
Abstract:
A device for calibrating scanned image includes a scanning unit arranged in a paper transmitting path for capturing texts and images on a document and transferring into electrical signals, a set of transmitting device which includes at least a first transmitting roller arranged upstream to the scanning unit, and a second transmitting roller arranged downstream to the scanning unit. There is no other transmitting roller arranged between the first and the second transmitting rollers, the distance between the first and the second transmitting rollers is shorter than the length of the document, and the second transmitting roller is faster than the first transmitting roller. A paper sensor is arranged in the paper transmitting path for detecting the position and the velocity of the document, and a control unit is connected with the paper sensor and the scanning unit to adjust the scan frequency in response to the position and the velocity of the document.
Abstract:
A transmission device of automatic document feeder includes a transmission gear assembly, a pickup transmission gear assembly, a paper-feed transmission gear assembly, a correction transmission gear assembly, a pressure transmission gear assembly and a turn-over transmission gear assembly. The transmission gear assembly includes a transmission roller, a first drive gear and a second drive gear. The pickup transmission gear assembly includes a pickup drive gear, a pickup swing arm and a pickup auxiliary swing arm. The paper-feed transmission gear assembly driven by the transmission gear assembly includes a paper-feed reverse gear and a paper-feed swing arm. And the correction transmission gear assembly and the paper-feed transmission gear assembly rotate towards the same direction. The pressure transmission gear assembly includes a pressure swing arm and a pressure actuating gear. The turn-over transmission gear assembly is driven by the first drive gear of the transmission gear assembly.
Abstract:
A feeding apparatus includes a pickup roller arranged to pick and feed a medium downstream along a conveying path, a separating roller arranged downstream to the pickup roller for advancing the medium downstream, a brake roller arranged opposite to the separating roller, and a pressing structure arranged opposite to the pickup roller and operable to swing toward or away from the pickup roller according to the rotating direction of the brake roller. When the brake roller rotates for feeding mediums downstream, the pressing structure moves toward the pickup roller and applies a normal force required for picking the medium. But when the brake roller stops rotating downstream because multiple mediums are fed between the brake roller and the separating roller, the pressing structure moves away from the pickup roller and stops applying normal force, so as to control the medium-picking process.
Abstract:
An automatic document feeder includes a paper transmitting path for guiding documents, a driving motor for providing driving torque, a pickup device disposed at the upstream of the paper transmitting path, an output device disposed at the downstream of the paper transmitting path and transmitting rollers disposed along the paper transmitting path for transmitting the documents, a first driving gear disposed between the pickup device and the output device, a transmitting gear swing arm equipped with a transmitting gear set and axially hinged with the first driving gear to swing according to the driving torque between a first position meshing the transmitting gear set with the pickup device and a second position idling the transmitting gear set, an actuator connected with the output device and a braking device disposed on the output device for locking the transmitting gear swing arm according to the position of the output device.
Abstract:
An automatic paper feed device includes a mechanical frame, a paper supply tray mounted to the mechanical frame, at least one motor mounted to one side of the mechanical frame, an upper cover, a stopper mechanism, a paper pressing mechanism, a transmission mechanism, a feed mechanism and a control mechanism. The stopper mechanism includes a blocking element and a torsion spring. The paper pressing mechanism includes a pressing board, at least one pressing roller and an elastic element. The feed mechanism is pivotally mounted to the paper supply tray. The control mechanism controls the motor to rotate, the rotation of the motor drives the transmission mechanism to support or break away from the pressing board to make the pressing board slide upward or downward with respect to the paper supply tray and further abut against or break away from the blocking element.
Abstract:
A dual-use automatic document feeder includes a tilted feeding path, a horizontal feeding path, a U-turn feeding path, an upper scanning unit and a movable document guider. The horizontal feeding path includes a front opening and a rear opening. The U-turn feeding path is connected between the tilted feeding path and the horizontal feeding path. The upper scanning unit is positioned between the front opening and the rear opening. The movable document guider is positioned at a junction between the U-turn feeding path and the horizontal feeding path. The movable document guider has a pivot end pivotally connected to the U-turn feeding path, a guiding arm slantwise extended downward and rearward from the pivot end to the horizontal feeding path, a blocking end positioned at a terminal end of the guiding arm, and an actuating end positioned at a terminal end of the blocking end.
Abstract:
A sheet feeding mechanism includes a feeding path, at least one card feeding roller mounted to the feeding path, at least one paper feeding roller coaxial with the at least one card feeding roller, at least one card idle roller contacting with the at least one card feeding roller, at least one paper idle roller contacting with the at least one paper feeding roller, at least one elastic unit connected to the feeding path, and a stroke limiting unit. The at least one elastic unit is fastened to the feeding path. The at least one elastic unit has a stretching stroke. The stroke limiting unit controllably shortens the stretching stroke.
Abstract:
A dust-proof sensing device includes a mechanical body, a feeding path, a first photoelectric sensor disposed above the feeding path, a second photoelectric sensor disposed under the feeding path, and an upper bracket. The mechanical body has a feeding path. The upper bracket is mounted above the feeding path. The upper bracket has an upper fastening portion fastened to the mechanical body, an upper wedging portion fastened at the upper fastening portion, an L-shaped upper light guiding holder fastened at the upper fastening portion, and a first light guider fastened at the upper light guiding holder. The upper fastening portion has a first inclined section. An inner edge of an upper surface of the first inclined section is intersected with a top edge of an inner surface of the upper wedging portion to form a clamping angle.
Abstract:
A pneumatic transmission device includes a transmitting channel, an air inlet and an air supply device. The transmitting channel includes a first feeding path, a second feeding path, and a compressing path communicated between the first feeding path and the second feeding path. The compressing path is gradually inclined downward and rearward from a front end of the compressing path to a rear end of the compressing path. The second feeding path is equipped with a scanning unit. The air inlet is slantwise extended upward and frontward from a top wall of the transmitting channel. An inside of the air inlet defines a passageway. The passageway is connected with the second feeding path. The air supply device is connected to the passageway. The air supply device injects high pressure air into the passageway.