An image forming apparatus includes a main body, a sheet cassette, and a controller. The main body includes a first electrode, a second electrode, and a capacitance detector configured to output a signal indicating a value corresponding to a quantity of electricity stored in the first electrode and the second electrode. The sheet cassette includes a sheet guide, and a conductor disposed in an upper portion of the sheet guide. In a state in which the sheet cassette is at an installation position defined in the main body, the first electrode and the second electrode face the conductor in an up-down direction and are at different positions in a moving direction in which the sheet guide is movable. The controller is configured to detect a position of the sheet guide from the value of the signal outputted from the capacitance detector.

There are a paper storage that stores paper on which an image is formed, a paper guide that is movably provided in the paper storage and restricts a position of the stored paper, a paper size acquirer that acquires a size of the paper stored in the paper storage, a size change determiner that determines, by using the acquired size of the paper, whether the paper stored in the paper storage was changed, a confirmation information selector that, when it is determined that the paper stored in the paper storage was changed, selects confirmation information requesting confirmation of a position of the paper guide in the paper storage in accordance with a difference in size between paper before and after the change, and a confirmation information notifier that notifies the selected confirmation information.

A paper size detection device comprises a first actuator comprising a plurality of operating arms and a first detection arm to move in association with movement of the plurality of operating arms, the plurality of operating arms having lengths or angles different from each other; a first sensor to output different results in accordance with a position of the first detection arm; a second actuator comprising one operating arm and a second detection arm to move in association with movement of the one operating arm; and a second sensor to output different results in accordance with a position of the second detection arm.

A method comprises obtaining a training dataset, the training dataset comprising sheet passage interval information associated with conveyance of a plurality of sheets in a sheet conveyance path of a training sheet processing apparatus, at least a portion of the sheets of the plurality of sheets having a known sheet classification of a set of sheet classifications; obtaining sheet timing data associated with the classifying, the sheet timing data comprising sheet passage interval information associated with conveyance of a predetermined number of sheets in the sheet conveyance path of a deployed sheet processing apparatus; classifying, using a machine learning model and the training dataset and the sheet timing data, for each interval window of a plurality of different interval windows, a predetermined number of sheets in a sheet conveyance path of a deployed sheet processing apparatus as a particular classification of the set of sheet classifications; and adjusting, based on the classifying, one or more operational parameters of a deployed sheet processing apparatus.

A supply device includes: a loading portion where recording media are loaded; a transport unit to transport the media; a contact portion provided on the loading portion, the contact portion being in contact with a side end portion of the media having a first size in a direction intersecting with a transport direction, the contact portion having a blowing portion to blow air to the side end portion; a guide portion detachably attached to the contact portion when media having a second size smaller than the media having the first size are loaded, the guide portion being configured to guide a side end portion of the media having the second size; and a duct provided in the guide portion, the duct including a discharge port to blow the air from the blowing portion to an upper end portion of the media having the second size loaded on the loading portion.

An adjustable leveling assembly for engaging a stack of a plurality of sheets in a feeder tray of a printing device, including a first wedging element slidably arranged on the feeder tray and operatively arranged to engage the stack, wherein when the first wedging element is disengaged with the stack, a top sheet of the plurality of sheets is non-parallel to the feeder tray, and when the first wedging element is engaged with the stack, the top sheet is substantially parallel to the feeder tray.

A sheet feeding device includes a sheet loading table on which a bundle of sheets is stacked, an identification mark on an end face of the sheet loading table, and an imaging unit to identify the identification mark.

According to one embodiment, provided is a support device including a base member, a pair of tip members, and a pair of lower end members. The base member is configured to be foldable at an intermediate portion in a width direction, the base member having a plate shape. The pair of tip members are present in both end portions of the base member in the width direction and have a configuration where a pair of plate materials are disposed to be tapered. The pair of lower end members have a plate shape, are present in a lower end portion of the base member on both sides of the base member in a thickness direction, and form a substantially right angle with the base member.

A sheet feeding apparatus includes an apparatus body, an opening/closing member supported on the apparatus body, a sheet support supported on the opening/closing member, and a rotary feeding member provided on the apparatus body to feed the sheet supported on the sheet support in a feeding direction. A first engagement member is provided in the apparatus body, and a second engagement member is provided on a downstream end portion of the sheet support in the feeding direction and engages with the first engagement member in a vertical direction that intersects an axial direction of the rotary feeding member when the opening/closing member is positioned at the open position. The rotary feeding member is lowered toward the sheet supported on the sheet support in a case where the opening/closing member is positioned at the open position.

A pull-in apparatus configured to pull in a unit toward a predetermined position in an apparatus body includes an arm member, a restriction member, a first action portion and a second action portion. The restriction member is movable between a lock position at which the restriction member restricts movement of the arm member in a first direction and a lock-release position at which the restriction member allows the movement of the arm member in the first direction. Movement of the restriction member from the lock position toward the lock-release position is restricted in a state in which the arm member is at a stand-by position, and is allowed in a state in which the arm member has been moved from the stand-by position in a second direction.