At least one mobile part included in a plate separator is configured movable between a first position and a second position, which is different from the first position. At least one biasing portion biases the at least one mobile part toward the first position. The at least one mobile part includes a contact portion that comes into contact with the top plate when a plate holder lifts the top plate upward. The at least one mobile part is configured to be moved toward the second position as being pushed by the top plate when the top plate in contact with the at least one contact portion is moved further upward, thereby allowing an upward movement of the top plate.

At least one mobile part included in a plate separator is configured movable between a first position and a second position, which is different from the first position. At least one biasing portion biases the at least one mobile part toward the first position. The at least one mobile part includes a contact portion that comes into contact with the top plate when a plate holder lifts the top plate upward. The at least one mobile part is configured to be moved toward the second position as being pushed by the top plate when the top plate in contact with the at least one contact portion is moved further upward, thereby allowing an upward movement of the top plate.

A medium conveyance device includes a first separator that separates a first medium from a plurality of mediums, a processor that processes the first medium and sends the processed first medium as a second medium, a second separator that when a non-separation mode is set, conveys the second medium to a next processor, and when a separation mode is set, conveys a third medium, which is separated from the second medium, to the next processor, and a controller that switches between the non-separation mode and the separation mode based on information obtained as a result of processing the first medium.

A medium conveyance device includes a first separator that separates a first medium from a plurality of mediums, a processor that processes the first medium and sends the processed first medium as a second medium, a second separator that when a non-separation mode is set, conveys the second medium to a next processor, and when a separation mode is set, conveys a third medium, which is separated from the second medium, to the next processor, and a controller that switches between the non-separation mode and the separation mode based on information obtained as a result of processing the first medium.

Disclosed is a sheet feeding apparatus configured to be attached to an image forming apparatus. The sheet feeding apparatus includes a frame body and a locking member provided on an upper part of the frame body, the locking member being configured to be movable between a locking position where the frame body is locked to the image forming apparatus and a releasing position where the locking of the frame body is released, wherein in attaching the heating unit to an attaching position of the frame body, the locking member is configured to restrict a movement of the heating unit to the attaching position by interfering with the heating unit when the locking member is located at the releasing position and to allow a movement of the heating unit to the attaching position when the locking member is located at the locking position.

Disclosed is a sheet feeding apparatus configured to be attached to an image forming apparatus. The sheet feeding apparatus includes a frame body and a locking member provided on an upper part of the frame body, the locking member being configured to be movable between a locking position where the frame body is locked to the image forming apparatus and a releasing position where the locking of the frame body is released, wherein in attaching the heating unit to an attaching position of the frame body, the locking member is configured to restrict a movement of the heating unit to the attaching position by interfering with the heating unit when the locking member is located at the releasing position and to allow a movement of the heating unit to the attaching position when the locking member is located at the locking position.

A sheet feeding apparatus includes a regulator to regulate a position of leading edges of first and second sheets supported on a sheet support. A drive transmission drives a return for returning the second sheet toward the sheet support and the regulator by a driving force, wherein the return includes a first cam follower, a first pivot shaft, and a claw supported pivotably around the first pivot shaft. The drive transmission includes a first cam to drive the return by engaging with the first cam follower and rotating, and the regulator includes a second pivot shaft that is parallel to the first pivot shaft. The regulating member includes the regulating surface and is arranged such that at least a portion of the regulating member is overlapped with the claw in an axial direction of the second pivot shaft.

A sheet feeding apparatus includes a regulator to regulate a position of leading edges of first and second sheets supported on a sheet support. A drive transmission drives a return for returning the second sheet toward the sheet support and the regulator by a driving force, wherein the return includes a first cam follower, a first pivot shaft, and a claw supported pivotably around the first pivot shaft. The drive transmission includes a first cam to drive the return by engaging with the first cam follower and rotating, and the regulator includes a second pivot shaft that is parallel to the first pivot shaft. The regulating member includes the regulating surface and is arranged such that at least a portion of the regulating member is overlapped with the claw in an axial direction of the second pivot shaft.

A feeding device to feed a sheet in a feeding direction includes a mount on which a substantially rectangular parallelepiped sheet pack is mountable; a first cutter to cut, in the feeding direction, a first side surface on one end side in a width direction orthogonal to the feeding direction out of four side surfaces of the sheet pack; a second cutter to cut, in the width direction, a second side surface on a downstream side in the feeding direction out of the four side surfaces; and a third cutter to cut, in the feeding direction, a third side surface on another end side in the width direction out of the four side surfaces. Height positions cut by the first cutter, the second cutter, and the third cutter coincide with each other. Cut portions by the first cutter, the second cutter, and the third cutter are coupled to each other.

A feeding device to feed a sheet in a feeding direction includes a mount on which a substantially rectangular parallelepiped sheet pack is mountable; a first cutter to cut, in the feeding direction, a first side surface on one end side in a width direction orthogonal to the feeding direction out of four side surfaces of the sheet pack; a second cutter to cut, in the width direction, a second side surface on a downstream side in the feeding direction out of the four side surfaces; and a third cutter to cut, in the feeding direction, a third side surface on another end side in the width direction out of the four side surfaces. Height positions cut by the first cutter, the second cutter, and the third cutter coincide with each other. Cut portions by the first cutter, the second cutter, and the third cutter are coupled to each other.