A sheet conveyance apparatus includes a shaft portion, a roller member, and a guide member. The roller member includes a hole portion with an opening through which the shaft portion is fitted with the hole portion. At least a part of the guide member is located upstream of an end of the shaft portion in an attaching direction of the roller member. The end of the shaft portion is located inside the opening of the hole portion when viewed in the attaching direction in a state where an outer circumferential surface of the roller member is in contact with the guide member at a position upstream of the end of the shaft portion in the attaching direction.

Provided are a rubber composition which is a base of a roller main body and capable of imparting favorable flexibility to the roller main body while maintaining high abrasion resistance to form, for example, a paper feeding roller that has a favorable paper feeding performance and can be used as a paper supply roller or the like; and a paper feeding roller in which the roller main body is formed using the rubber composition. There is provided a rubber composition contains a rubber that includes 20 to 80 parts by mass of a non-oil extended EPDM having an ethylene content of 55% to 72%, and an oil extended EPDM; and 20 parts by mass or less of a filler and 2.5 parts by mass or more of a peroxide crosslinking agent per 100 parts by mass of the rubber.

Provided are a rubber composition capable of imparting a high tensile strength to a roller main body so as to be able to be used for equipment that allows paper to pass through at high speed, while maintaining high abrasion resistance of the roller main body and a favorable paper feeding performance of the paper feeding roller; and a paper feeding roller. There is provided a rubber composition contains: a rubber that includes a non-oil extended EPDM having an ethylene content of 55 to 72%; and more than 20 parts by mass and 30 parts by mass or less of a filler, and 2.5 parts by mass or more of a peroxide crosslinking agent per 100 parts by mass of the rubber, in which the filler contains 15 to 30 parts by mass of an amorphous silica per 100 parts by mass of the rubber.

A medium conveyance device includes a guiding member that is movably supported on a frame, a pick roller that is rotatably supported on the guiding member and that rotates to feed a medium that is placed on a tray to a feed roller, and a joint unit that transmits a rotation force from a drive shaft to the pick roller.

A medium feed apparatus includes a first sensor, a second sensor, a third sensor to detect rotation of the separation roller, and a processor. The processor controls a motor to put the separation roller on hold from when starting the feed of the medium to when the second sensor detects a front end of the medium and generate the drive force from when the second sensor detects the front end of the medium to when the first sensor detects a back end of the medium, and controls the motor to stop the feed roller while generating the drive force if the third sensor detects rotation of the separation roller in the opposite direction to the medium feed direction during feed of the medium.

A method including correcting output of an image sensor unit based on correction information of the image sensor unit that captures and discriminates a paper sheet. A apparatus includes an image sensor unit which includes an image capturing element that captures a banknote so as to discriminate the banknote, a controller that controls the image sensor unit, and a first attachment part, to which the image sensor unit is attached to be detachable, and which includes a connection terminal that connects the image sensor unit and the controller with each other, and which is arranged in a conveyance path for conveying the banknote.

A sheet conveyance apparatus includes a storage unit storing a sheet, a conveyance member to convey a sheet, a support shaft portion, and a separation unit. The support shaft portion has one end fixed to a main body of the sheet conveyance apparatus and the other end as a free end that is not fixed to the main body. The separation unit pinches and conveys a sheet with the conveyance member and separates a plurality of sheets stored in and fed from the storage unit one by one. The separation unit includes a separation member that is supported by the support shaft portion and rotatable with the support shaft portion, and a holding member to hold the separation member. By moving the holding member in an axial direction of the support shaft portion, the separation unit is removed from the apparatus with the holding member holding the separation member.

The present invention addresses the problem of providing a bill conveying roller base having an excellent swelling resistance. In order to solve this problem, the bill conveying roller base is provided with an elastic layer covering at least part of the outer peripheral surface, the elastic layer comprising a thermosetting polyurethane which is obtained by reacting polyol components containing a lactone-based polyol with polyisocyanate components containing methylene diphenyl diisocyanate (MDI).

A sheet feeding device, which is included in an image forming apparatus, includes a roller detachably attached to the image forming apparatus and configured to feed a sheet in a sheet conveying direction, a shaft configured to engage with the roller and transmit a driving force to the roller, a movable body configured to rotate in a direction of rotational axis and includes a holding portion configured to engage with the second engaging portion of the roller and rotatably hold the roller and a guide configured to guide attachment of the second engaging portion of the roller to the holding portion, and a biasing body configured to apply a biasing force and bias the movable body from a drive receiving side to a drive transmitting side.

An image reading device includes a first power transmission section configured to transmit a driving force to the input gear, wherein the first power transmission section is configured to transmit the driving force from a first drive source that drives the feed roller to the input gear and furthermore, the first power transmission section includes a one-way clutch that does not transmit the power of the first drive source to the input gear when the first drive source rotates in a first rotation direction, which is a rotation direction during medium feeding, and transmits the power of the first drive source to the input gear when the first drive source rotates in a second rotation direction, which is opposite to the first rotation direction.