Abstract: An image reading apparatus includes a casing that blocks ambient light and has an opening portion in a bottom surface, an image capturing unit that captures an image of a medium exposed to an internal portion of the casing in the opening portion, and a plurality of light sources that are arranged on the internal portion of the casing and irradiate light toward the opening portion. The plurality of light sources irradiate light to different areas on a plane in the opening portion.

Abstract: An image reading apparatus includes a casing that blocks ambient light and has an opening portion in a bottom surface, an image capturing unit that captures an image of a medium exposed to an internal portion of the casing in the opening portion, and a plurality of light sources that are arranged on the internal portion of the casing and irradiate light toward the opening portion. The plurality of light sources irradiate light to different areas on a plane in the opening portion.

Abstract: A medium feeding apparatus includes an opening unit (a lock shaft, a lock arm, a hopper, a link member, and a rotating member) that performs an opening operation in a direction in which rollers coming into press contact with each other on a conveying path for a medium are separated from each other when a conveyance error of the medium occurs. An error release operation control unit of a controller controls the opening unit by switching whether an opening operation is performed to the degree of opening in which a conveying roller and a driven roller are separated from each other or an opening operation is performed to the degree of opening in which a separating roller and a braking roller are separated from each other, according to an entering distance of the medium on the conveying path.

Abstract: A medium feeding apparatus includes a rotating unit, a fixed unit, a separating roller and a conveying roller that are installed in the rotating unit and convey a medium present on a conveying path in a conveying direction, a braking roller and a driven roller that are installed in the fixed unit and come into press contact with the separating roller and the conveying roller on the conveying path, respectively, a lock arm that is installed in the rotating unit, a lock shaft that is installed in the fixed unit and keeps the position of the rotating unit relative to the fixed unit by locking the lock arm, and a position changing unit (a link member and a rotating member) that changes the position of the rotating unit relative to the fixed unit by the movement of the lock shaft in a up-and-down direction.

Abstract: A medium feeding apparatus includes an opening unit (a lock shaft, a lock arm, a hopper, a link member, and a rotating member) that performs an opening operation in a direction in which rollers coming into press contact with each other on a conveying path for a medium are separated from each other when a conveyance error of the medium occurs. An error release operation control unit of a controller controls the opening unit by switching whether an opening operation is performed to the degree of opening in which a conveying roller and a driven roller are separated from each other or an opening operation is performed to the degree of opening in which a separating roller and a braking roller are separated from each other, according to an entering distance of the medium on the conveying path.

Abstract: A medium feeding apparatus includes an opening/closing unit (a lock shaft, a lock arm, a hopper, a link member, and a rotating member) that performs an opening operation in a direction in which rollers of each of a separator and a conveyor coming into press contact with each other are separated from each other at the time of the occurrence of a conveyance error of a medium and performs a closing operation in a direction in which the rollers come into contact with each other after the recovery of the conveyance error. When an operator is present around the medium feeding apparatus, an error release operation control unit controls the opening/closing unit so that the opening/closing unit performs the opening operation and the closing operation at a relatively low speed as compared to when the operator is not present around the medium feeding apparatus.

Abstract: An image reading apparatus includes an RFID (radio frequency identification) detection unit that detects a reading RFID (radio frequency identification) tag disposed to a reading target; an image reading unit that reads an image of the reading target; a diagnosing RFID (radio frequency identification) tag capable of being detected by the RFID detection unit; and an abnormality determination unit that determines abnormality based on a state of detection of the RFID detection unit. When the diagnosing RFID tag is detected at the time the reading RFID tag is not detected by the RFID detection unit, the abnormality determination unit determines abnormality of the reading RFID tag, and when the diagnosing RFID tag is not detected, the abnormality determination unit determines abnormality of the RFID detection unit.

Abstract: A sheet feeding apparatus includes a feeding unit capable of feeding a sheet-like medium, plural speed detecting units capable of respectively detecting a speed of the medium fed by the feeding unit, at plural positions along a width direction of the medium orthogonal to a feeding direction of the medium, and a bound-medium detecting unit capable of detecting the medium having a part thereof bound with another one of the medium, based on the speed detected respectively by the speed detecting units.

Abstract: In a feeding apparatus, a control device determines whether a brake roller is rotating based on the result of detection by a rotating-state detection sensor while a medium is being transferred by a separator roller. When determining that the brake roller is not rotating, the control device sets a pickup roller to non-contact state where the pickup roller is not in contact with a medium on a feed tray while a medium is not being transferred by the separator roller.

Abstract: In a feeding apparatus, a control device determines whether a brake roller is rotating based on the result of detection by a rotating-state detection sensor while a medium is being transferred by a separator roller. When determining that the brake roller is not rotating, the control device sets a pickup roller to non-contact state where the pickup roller is not in contact with a medium on a feed tray while a medium is not being transferred by the separator roller.

Abstract: A sheet feeding apparatus includes a feeding unit capable of feeding a sheet-like medium, plural speed detecting units capable of respectively detecting a speed of the medium fed by the feeding unit, at plural positions along a width direction of the medium orthogonal to a feeding direction of the medium, and a bound-medium detecting unit capable of detecting the medium having a part thereof bound with another one of the medium, based on the speed detected respectively by the speed detecting units.

Abstract: A sheet feeding device includes a feeding unit that feeds a sheet; a rolling member that rolls by having contact with the sheet being fed by the feeding unit; a supporting member that moves along with a behavior of the sheet with supporting the rolling member so that the rolling member rolls in a feeding direction of the sheet at a predetermined position on the sheet; an acceleration measuring unit that measures accelerations acting on the supporting member in three directions; and a detecting unit that detects a feed error of the sheet based on the accelerations measured by the acceleration measuring unit.