A medium processing apparatus includes a processing section performing a process on a sheet-like medium; a transport roller pair including a driving roller and a driven roller, and transporting the medium in a transport path including a region in which the processing section performs a process; a first casing accommodating the processing section and the transport roller pair; a second casing configured to close and open with respect to the first casing; and a displacement mechanism displacing the transport roller pair to a separation position and a contact position. The displacement mechanism displaces the transport roller pair from the contact position to the separation position in conjunction with an operation of opening the second casing.

A medium processing apparatus includes a processing section performing a process on a sheet-like medium; a transport roller pair including a driving roller and a driven roller, and transporting the medium in a transport path including a region in which the processing section performs a process; a first casing accommodating the processing section and the transport roller pair; a second casing configured to close and open with respect to the first casing; and a displacement mechanism displacing the transport roller pair to a separation position and a contact position. The displacement mechanism displaces the transport roller pair from the contact position to the separation position in conjunction with an operation of opening the second casing.

A sheet feeding parameter management system includes: a plurality of air sheet feeding apparatuses each including an air sheet feeder that feeds a sheet and enabled to change a sheet feeding parameter; and a management apparatus connected to the plurality of air sheet feeding apparatuses, wherein each of the plurality of air sheet feeding apparatuses includes: a sheet type information acquisitor that acquires sheet type information; and a hardware processor that: adjusts the sheet feeding parameter; and transmits the sheet type information and the sheet feeding parameter to the management apparatus, and the management apparatus includes the hardware processor that: causes a storage to store an adjustment result associated with the sheet type information and the sheet feeding parameter; and sets, based on the adjustment result, for an air sheet feeding apparatus to be processed among the plurality of air sheet feeding apparatuses.

A sheet feeding parameter management system includes: a plurality of air sheet feeding apparatuses each including an air sheet feeder that feeds a sheet and enabled to change a sheet feeding parameter; and a management apparatus connected to the plurality of air sheet feeding apparatuses, wherein each of the plurality of air sheet feeding apparatuses includes: a sheet type information acquisitor that acquires sheet type information; and a hardware processor that: adjusts the sheet feeding parameter; and transmits the sheet type information and the sheet feeding parameter to the management apparatus, and the management apparatus includes the hardware processor that: causes a storage to store an adjustment result associated with the sheet type information and the sheet feeding parameter; and sets, based on the adjustment result, for an air sheet feeding apparatus to be processed among the plurality of air sheet feeding apparatuses.

A medium conveying apparatus includes a feed roller, a brake roller, a motor to generate a driving force, a first transmission mechanism to transmit the driving force to the brake roller through a first torque limiter, to rotate the brake roller in a direction opposite to a medium feeding direction, a second transmission mechanism to transmit the driving force to the brake roller through a second torque limiter, bypassing the first torque limiter, to rotate the brake roller in the direction opposite to the medium feeding direction, and a processor to detect media multi-feed, and perform control in such a way as to transmit the driving force to the brake roller by the second transmission mechanism and also cause the feed roller to be driven to rotate in the direction opposite to the medium feeding direction by the brake roller, when the media multi-feed is detected.

A medium conveying apparatus includes a feed roller, a brake roller, a motor to generate a driving force, a first transmission mechanism to transmit the driving force to the brake roller through a first torque limiter, to rotate the brake roller in a direction opposite to a medium feeding direction, a second transmission mechanism to transmit the driving force to the brake roller through a second torque limiter, bypassing the first torque limiter, to rotate the brake roller in the direction opposite to the medium feeding direction, and a processor to detect media multi-feed, and perform control in such a way as to transmit the driving force to the brake roller by the second transmission mechanism and also cause the feed roller to be driven to rotate in the direction opposite to the medium feeding direction by the brake roller, when the media multi-feed is detected.

According to one embodiment, an inspection device includes a transmitter, a receiver, a feeder, and a processor. The transmitter emits an ultrasonic wave. The feeder causes an inspection object to move relative to the transmitter and the receiver in a space between the transmitter and the receiver. The processor processes a received signal corresponding to the ultrasonic wave obtained by the receiver. In a first state in which the inspection object includes a first region and a second region, the first region includes a foreign object, and the second region does not include the foreign object. The received signal includes a first signal level in a first interval, a second signal level in a second interval, and a third signal level in a third interval. The processor detects the foreign object by detecting at least one extreme value occurring in the received signal in a fourth interval.

According to one embodiment, an inspection device includes a transmitter, a receiver, a feeder, and a processor. The transmitter emits an ultrasonic wave. The feeder causes an inspection object to move relative to the transmitter and the receiver in a space between the transmitter and the receiver. The processor processes a received signal corresponding to the ultrasonic wave obtained by the receiver. In a first state in which the inspection object includes a first region and a second region, the first region includes a foreign object, and the second region does not include the foreign object. The received signal includes a first signal level in a first interval, a second signal level in a second interval, and a third signal level in a third interval. The processor detects the foreign object by detecting at least one extreme value occurring in the received signal in a fourth interval.

A holding member is configured to hold a feed member and movable up and down. A lever member is configured to pivot on a pivot shaft and includes a contact portion configured to be in contact with the holding member. An elastic member is connected to the lever member and configured to urge the holding member downward through the lever member. The elastic member is disposed such that, when viewed in an axial direction of the pivot shaft of the lever member, a distance from the pivot shaft to a line of action of a force applied by the elastic member to the lever member in a case where the feed member is located at a first position is shorter than a distance from the pivot shaft to the line of action in a case where the feed member is located at a second position below the first position.

An image forming apparatus includes: an image forming unit configured to form an image on a sheet being conveyed on a horizontal path; and a double feed sensor configured to execute double feed detection processing of detecting a state in which a plurality of sheets being conveyed on the horizontal path are conveyed in a duplicate manner. The image forming apparatus includes a double feed detection function table, in which whether to enable or disable the double feed detection processing is set according to a type of a sheet. The image forming apparatus determines whether to execute the double feed detection processing at a time of image formation in accordance with sheet setting information including information on a characteristic of a sheet to be used for the image formation and setting information on whether to execute the double feed detection processing, and the double feed detection function table.