According to one embodiment, a paper sheet processing apparatus includes a conveyance device with a conveyor belt, and an inspection device configured to inspect a paper sheet conveyed by the conveyor belt. The inspection device includes an image detection device configured to capture an image of the paper sheet and the conveyor belt and obtain an image of the paper sheet and the conveyor belt, an image processing device configured to detect a degradation level of the conveyor belt based on an belt image of the conveyor belt, and a controller configured to transmit information encouraging replacement of the conveyor belt to a monitor.

A relay conveyance device includes a relay conveyance path arranged between an image forming apparatus and a post processing device to convey a sheet from the image forming apparatus to the post processing device, two reversing units reversing a surface side and a back-face side of the sheet, and a control device controlling conveyance of the sheet on the relay conveyance path. The relay conveyance path includes two reverse paths respectively passing through the two reversing units, a branch section branching into the two reverse paths at an upstream side, and a confluence section joining the two reverse paths. The control device controls the branch and confluence sections to convey the sheet while alternately switching the two reverse paths, measures an interval time between the sheets passing through the confluence section, and controls conveyance of the sheet in the two reverse paths so as to uniformize the interval time.

A feeding apparatus includes a rotary member unit having a feeding rotary member to feed a recording material and a separating rotary member which forms a nip portion with the feeding rotary member, an output unit, and a control unit. Where a single recording material is fed to the nip portion, the separating rotary member is rotated in a predetermined direction by the single recording material and, where recording materials are overlapped with one another and fed to the nip portion, the separating rotary member rotation is stopped or rotated in a direction opposite to the predetermined direction to separate the overlapped recording materials. The output unit outputs a state signal in accordance with a separating rotary member rotation state. The control unit obtains a rotation speed of the separating rotary member from the state signal output and determines that the rotary member unit is replaced with a new product.

According to one embodiment, a paper sheet processing apparatus includes a conveyance device with a conveyor belt, and an inspection device configured to inspect a paper sheet conveyed by the conveyor belt. The inspection device includes an image detection device configured to capture an image of the paper sheet and the conveyor belt and obtain an image of the paper sheet and the conveyor belt, an image processing device configured to detect a degradation level of the conveyor belt based on an belt image of the conveyor belt, and a controller configured to transmit information encouraging replacement of the conveyor belt to a monitor.

A converting line includes a rewinding machine for winding web material into a log. For time points during a time period of the log wind cycle, predictive information representative of a log to be wound is generated and stored in a memory of a control of the rewinding machine. An image capture device is enabled to capture a plurality of images of the log being wound in the winding nest at the plurality of corresponding time points during the time period. Log image capture information is generated based upon the plurality of captured images and corresponding time points during the time period. The log image capture information is compared with the generated predictive log image information to determine a difference in log image. Revised predictive log image information is generated based at least in part upon a difference in the log image capture information relative to predictive log image information.

An image forming device comprising: a tray in which multiple number of sheets are stored; a feeder that feeds the sheet stored in the tray; and a hardware processor that: measures a carrying speed of the sheet fed by the feeder; determines whether or not the measured carrying speed is affected by the following sheet; corrects the carrying speed upon determining the carrying speed is affected by the following sheet; and detects a wear status on the feeder based on the measured carrying speed or the corrected carrying speed.

An image forming apparatus including: a sheet feeding roller which feeds a sheet accumulated on a tray; and a hardware processor which: detects a movement speed of the sheet currently fed by the sheet feeding roller; and calculates a difference amount between the movement speed and a first reference speed, and determines a life of the sheet feeding roller based on the difference amount, wherein the hardware processor determines whether or not to use the movement speed of a first sheet for life determination based on a relationship between the movement speed of the first sheet and the movement speed of a sheet fed before the first sheet, and if the hardware processor determines not to use the movement speed of the first sheet for the life determination, the hardware processor calculates the difference amount by excluding the movement speed of the first sheet.

A relay conveyance device includes a relay conveyance path arranged between an image forming apparatus and a post processing device to convey a sheet from the image forming apparatus to the post processing device, two reversing units reversing a surface side and a back-face side of the sheet, and a control device controlling conveyance of the sheet on the relay conveyance path. The relay conveyance path includes two reverse paths respectively passing through the two reversing units, a branch section branching into the two reverse paths at an upstream side, and a confluence section joining the two reverse paths. The control device controls the branch and confluence sections to convey the sheet while alternately switching the two reverse paths, measures an interval time between the sheets passing through the confluence section, and controls conveyance of the sheet in the two reverse paths so as to uniformize the interval time.

A feeding apparatus includes a rotary member unit having a feeding rotary member to feed a recording material and a separating rotary member which forms a nip portion with the feeding rotary member, an output unit, and a control unit. Where a single recording material is fed to the nip portion, the separating rotary member is rotated in a predetermined direction by the single recording material and, where recording materials are overlapped with one another and fed to the nip portion, the separating rotary member rotation is stopped or rotated in a direction opposite to the predetermined direction to separate the overlapped recording materials. The output unit outputs a state signal in accordance with a separating rotary member rotation state. The control unit obtains a rotation speed of the separating rotary member from the state signal output and determines that the rotary member unit is replaced with a new product.

In accordance with an embodiment, a sheet conveyance apparatus comprises a roller, an acceleration sensor, and a controller. The roller conveys a sheet. The acceleration sensor is attached to the roller to output a signal indicating a direction of gravitational acceleration applied to the roller at the time the roller rotates. The controller acquires cumulative angle at which the roller rotates based on the signal output by the acceleration sensor. The controller determines whether to replace the roller based on the cumulative angle acquired by the rotation angle acquisition section.