An image reading apparatus includes a first scanner provided in a housing, a conveyance unit, and a first calibration member. The conveyance unit is provided with a separation unit which separates the first calibration member upward from the first scanner. When the first calibration member is separated, the separation unit releases connection between the conveyance unit and the housing.

An image forming apparatus includes a development unit having a first wireless communication part, a developer cartridge having a second wireless communication part and an antenna part that communicates with the first and second wireless communication parts. When the first and second wireless communication parts are respectively accommodated in holding parts, the first wireless communication part is closer to the antenna part than the second wireless communication part is, and the second wireless communication part and the first wireless communication part oppose each other.

A developer container includes a memory device with a first marker; and a main body with a second marker, the main body being configured to accommodate a developer. The memory device is attached to the main body such that both the first marker and the second marker are visually recognized.

A sheet conveyer, comprising: a 1st conveying roller; a 1st support part to support the 1st conveying roller; a 1st helical gear to rotate together with the 1st conveying roller and to generate thrust in a particular direction; a 2nd conveying roller; a 2nd support part to support the 2nd conveying roller; a 2nd helical gear to generate thrust in the particular direction; a 3rd helical gear to engage with the 1st helical gear; a 4th helical gear to engage with the 2nd helical gear; and a clutch to connect or disconnect transmission of a driving force between the 3rd helical gear and the 4th helical gear, wherein: when the clutch is disconnected, the 1st and 2nd conveying rollers are disposed at an initial position, and when the clutch is connected, the 1st and 2nd conveying rollers move from the initial position in the particular direction.

According to an aspect of the invention, a wiring structure includes a pair of printed circuit boards, a cable that connects the pair of printed circuit boards, and a grounding member that causes grounding of the cable in a region including a position separated from a connection end between the printed circuit board and the cable by a distance obtained by dividing a radiation mode length of a system including the cable and the pair of printed circuit boards as antennas by 2.

A sheet supply apparatus detachably attached to an image forming apparatus is configured to receive a drive force from the image apparatus to supply sheet to the image forming apparatus. The sheet supply apparatus includes a sheet supply tray, a sheet supply roller, a first transmission mechanism configured to transmit a drive force from the image forming apparatus to the sheet supply roller, a second transmission mechanism including an output member and configured to transmit a drive force supplied from the image forming apparatus to the output member, a clutch mechanism configured to intermittently transmit a drive force from the image forming apparatus to the second transmission mechanism, a latch member pivotable between a restriction position and an allowance position, a change cam, a sector gear, a rotational force applying member, an engaging member, a first engagement portion, a second engagement portion, and an electromagnetic solenoid.

A sheet storage device includes a case, a lift plate, and a lift attachment. The lift attachment is fixed, in a detachable manner, to a central portion of the lift plate in a width direction. The lift attachment supports a lower surface of the sheets stacked on the lift plate at a position higher than the upper surface of the lift plate. The lift attachment includes a base portion and a pair of arm portions. The pair of arm portions are respectively formed to extend from an end portion of the base portion that is on a downstream side in the sheet feed direction, to opposite directions in the width direction.

A sheet stacking tray that includes a single pneumatic baffle which uses the pressure differential caused by the flow of air across a horizontal planar surface of the pneumatic baffle to hold the lead edge of sheets driven by an input nip into the sheet stacking tray above a stack especially for longer and lighter weight sheets as they are driven by the input nip to a registration wall.

An image formation apparatus is such that at least one of an upstream guide plate and a downstream guide plate is provided with a guide roller that extends in a direction transverse to a direction in which a continuous medium is transported and that rotates on the side of an upper surface of the continuous medium while abutting against the continuous medium in a state where the continuous medium is tensioned.

A binding process device includes an advancing member and a binding process unit. The advancing member advances toward a corner of a recording-medium bundle having multiple edges and having the corner at an intersection position where the edges intersect. The binding process unit performs a binding process on the recording-medium bundle by causing the advancing member to advance toward the corner and is capable of performing the binding process at a first position and at a second position located closer to the intersection position than the first position.