An image forming apparatus includes: a conveyance path that conveys a sheet; registration rollers that are arranged across the conveyance path and each comprise a nip part; a sheet locking member that locks a front end of a sheet conveyed in the conveyance path, where the sheet locking member swings between a first attitude and a second attitude, in the first attitude the sheet locking member locks the sheet on an upstream side of the nip part, and in the second attitude the sheet locking member is retracted to a downstream side of the nip part and allows the sheet to pass through the nip part; an energizer that energizes the sheet locking member to maintain the first attitude; and a hardware processor that detects deterioration of the energizer.

An elastic roller is capable of elastic deformation at low load, lightweight and low-cost, and the surface speed of the roller has been made stable. At a drawing showing the view from the side of pipe 2 and flange 3 which make up roller 1, roller 1 which has pipe 2 and flange 3 is supported by shaft 8 which is inserted therein along axis 8a of shaft 8, the situation being such that elastic deformation occurs upon being pressed downward by pressure P from pressure-applying body 11 above pipe. None of the four outermost ribs 7a disposed in outermost gap 6a between outermost ring 4a of flange 3 and middle ring 4b which is mutually adjacent thereto and toward the interior therefrom is present in the upper portion of pipe 2.

A sheet processing apparatus comprises a roller disposed in a sheet conveyance path; a sheet sensor disposed in the sheet conveyance path and configured to detect conveyance of sheets and generate sensor information indicative of detection; and a controller. The controller is configured to, for each sheet of a predetermined number of sheets of a plurality of sheets conveyed by the roller, use the sensor information to generate an individual sheet-conveyance dataset indicating a sheet passage interval; and store the individual sheet-conveyance dataset in data storage. The controller is further configured to, after the roller conveys the predetermined number of sheets, calculate a summary sheet-conveyance dataset including sheet passage interval statistics for the predetermined number of sheets; store the summary sheet-conveyance dataset in the data storage; discard the individual sheet-conveyance datasets from the data storage; and evaluate the sheet passage interval statistics to determine whether to modify the predetermined number of sheets.

In accordance with an embodiment, a sheet processing apparatus, containing a controller that acquires a predetermined data associated with a physical quantity of one of a driving motor or a driven member driven by the motor based on a predetermined signal, compare the predetermined data with a threshold value, and determine whether to transmit a request for increasing a discharge interval of a sheet based on the comparative result.

An image forming system comprises an image forming apparatus for forming an image on a sheet and a sheet processing apparatus for performing binding processing on a sheet bundle formed of a plurality of sheets having formed the image. The sheet processing apparatus performs binding processing by a stapler on the sheet bundle placed on an intermediate tray and an opening. The image forming apparatus controls image forming preparation and timing of movement of the stapler in accordance with presence/absence of the sheet bundle on the opening, position of the stapler and timing to obtain an image forming instruction including binding processing.

Provided is a paper-discharge apparatus that suppresses operating sound of the paper-discharge apparatus. A contact member changes the posture of the introduction guide by coming in contact with the introduction lever and rotating the introduction lever. A control unit sets a state in which paper is introduced to the paper-discharge-conveying unit to a non-contact state of the introduction lever and contact member, and sets a state when conveyed paper is guided to another discharge destination to a contact state of the introduction lever and the contact member. The control unit rotates the motor at a first speed and moves the contact member, and brings the contact member in contact with the introduction lever after setting the rotating speed of the motor to a second speed that is slower than the first speed.

A device for transporting notes of value comprises a first idler pulley mounted in the device and at least a second idler pulley mounted in the device, as well as an endless belt running around the idler pulleys, and a freely rotatable guide roller mounted in the device and having at least one connecting area for reception in a receiving opening of the device. The axis of rotation of the guide roller has in a first receiving position of the connecting area in the receiving opening a first orthogonal distance to a plane in which the axes of rotation of the idler pulleys run. The axis of rotation of the guide roller has in a second receiving position of the connecting area in the receiving opening a second orthogonal distance to the plane.

A detector, which is included in a sheet feeding device, a sheet conveying device, an image forming apparatus and an image reading device, contacts and detects a sheet, and includes a base, a sheet contact face to which the sheet contacts, and a coat layer formed on the sheet contact face. A difference of a static coefficient of friction s of the coat layer and a kinetic coefficient of friction d of the coat layer is smaller than and equal to 0.12.

In accordance with an embodiment, a sheet processing apparatus, containing a controller that acquires a predetermined data associated with a physical quantity of one of a driving motor or a driven member driven by the motor based on a predetermined signal, compare the predetermined data with a threshold value, and determine whether to transmit a request for increasing a discharge interval of a sheet based on the comparative result.

In accordance with an embodiment, a sheet processing apparatus, containing a controller that acquires a predetermined data associated with a physical quantity of one of a driving motor or a driven member driven by the motor based on a predetermined signal, compare the predetermined data with a threshold value, and determine whether to transmit a request for increasing a discharge interval of a sheet based on the comparative result.