An image forming apparatus includes a printing unit, first and second stacking units, first and second conveyance units, and a control unit. When the first conveyance unit conveys a sheet to the first stacking unit, the printing unit prints an image on a first number of sheets as first sheets in a first printing operation and prints the image on the first sheets in a second printing operation. When the second conveyance unit conveys the sheet to the second stacking unit, the printing unit prints the image on a second number of sheets, greater than the first number of sheets, as second sheets in the first printing operation and prints the image on the second sheets in the second printing operation. A number of sheets printed per unit time in the second printing operation is less than a number of sheets printed per unit time in the first printing operation.

An image forming apparatus includes a reverse roller pair including a drive roller and a driven roller by which a recording medium is nipped and conveyed reversibly, a motor configured to rotate the drive roller reversibly, a conveyance roller pair, a detection unit configured to detect the recording medium conveyed by the conveyance roller pair, and a controller configured to control the motor, in a case in which the recording medium is detected by the detection unit, to cause the drive roller to rotate in a first rotation direction by a first rotation amount, thereafter to cause the drive motor to rotate in a second rotation direction by a second rotation amount. A difference between the first rotation amount and the second rotation amount is set to an integer multiple of a predetermined rotation amount of the motor, the predetermined rotation amount making the drive roller one rotation.

A control device executes: either a first conveyance change control or a second conveyance change control; and a retraction control when an operation device receives an interruption operation during execution of a specified number stack control. In the first conveyance change control, a sheet conveyance device of a target unit is changed to a relay conveyance state, and the sheet conveyance device of another coupled unit that is present downstream of the target unit in a main conveyance direction is changed to a stack conveyance state. In the second conveyance change control, the sheet conveyance device of another coupled unit that is present upstream in the main conveyance direction is changed to the stack conveyance state. In the retraction control, a lift mechanism of the target unit is caused to execute a mount operation by which a stack tray is moved down to a mount position on a carriage portion.

According to an example, a method to wind media in an output roller downstream a media advance engine comprises advancing a medium for a determined medium length, collecting a first portion of the determined medium length at a first speed by rotating the output roller in a winding direction, and collecting a second portion of the determined medium length by rotating the output roller in a winding direction at a second speed, wherein the first speed is greater than the second speed.

Rewinder for making paper logs of paper material including a detection system with optical means adapted to detect, in a succession of predetermined detection times, a succession of diameters assumed in such times by a log being formed in a winding station and a programmable electronic unit which compares the diameters measured by the optical means with a succession of corresponding preset diameters and to calculate a sequence of differences. The processing unit receives a signal relating to the value of the actual diameter of the completed log and determines a parameter related to the trend over time of the differences. Elements for adjusting the thickness of the paper web automatically adjust said thickness if the parameter is between predetermined values.

Provided is a plate material feeding device that can achieve reduced power consumption, improve durability, and supply plate material with high precision. A plate material feeding device is provided with a housing, a lower roll, an upper roll, a lower roll support member for supporting the lower roll, an upper roll support member for supporting the upper roll, and a slider movable in the horizontal direction along the upper roll support member, and can feed plate material clamped by the lower roll and the upper roll. A hole is provided in the slider, and a rod is provided in the upper roll support member. By inserting at least part of the rod in the hole in a slidable manner, the upper roll support member can move in the vertical direction when the slider moves in the horizontal direction.

A controller drives a floating unit and a conveyor to perform a sheet feed operation, during the sheet feed operation, acquires an amount of received light at a detector during floating of sheets floated by the floating unit each time each sheet is conveyed by the conveyor, and perform a following control of lifting a stacking tray upon the acquired amount of received light being less than a threshold value. The controller, after start of the sheet feed operation, samples amounts of received light at the detector during floating of the sheets floated by the floating unit, performs a threshold value determination process of determining the threshold value by using the sampled amounts of received light, and starts the following control upon determining the threshold value.

A medium processing apparatus includes an intermediate stacker on which media recorded by a recording apparatus are stacked, the recording apparatus including a liquid ejection head which performs recording by ejecting liquid to media and a maintenance apparatus which performs maintenance of the liquid ejection head, and a processor which executes a process on the media received by the intermediate stacker. The medium processing apparatus executes the process after a medium which is last recorded before the maintenance is stacked on the intermediate stacker.

A sheet conveyance apparatus includes a conveyance unit and first and second moving members respectively including first and second projection portions. When the first projection portion contacts a sheet, the first moving member is moved from a first projection position, where the first projection portion projects to a conveyance path, to a first retraction position, where the first projection portion is retracted from the first projection position. When the first moving member moves to the first retraction position, the second moving member moves from a second retraction position, where the second projection portion is retracted from the second projection position, to a second projection position, where the second projection portion projects to the conveyance path. When a sheet pushes the second projection portion, the second moving member is moved from the second projection position to the second retraction position with the first moving member located at the first retraction position.

Subsequent to completion of printing on a current media sheet, a pick transmission of the printing device linking a motor of the printing device to a pick roller of the printing device is engaged to load a next media sheet via the motor driving the pick roller. While the next media sheet is being loaded due to the motor driving the pick roller, the current media sheet is ejected via the motor driving an eject roller of the printing device.