A conveying apparatus includes a rotator, a driver, a measuring device, and circuitry. The rotator is configured to convey a medium. The driver is configured to apply a driving force to the rotator to rotate the rotator. The measuring device is configured to measure the driving force applied to the rotator by the driver. The circuitry is configured to: determine, according to the driving force measured, whether to change at least one of frequency and items of information to be acquired for prediction of a defective conveyance of the medium caused by the rotator; and acquire information of at least one of the items according to a result of determination, at a frequency according to the result of determination.

A positioning and conveying device includes an endless conveyor belt which runs around two rollers mounted to a frame. The outer surface of the roller is defined by a plurality of roller segments which complementary cover the perimeter. The segments are individually movable in the axial direction for laterally moving the conveyor belt relative to the frame. The device includes at least one actuator assembly including a controllable magnetic actuator mounted at either end of the roller. At either end of the segments a ferromagnetic counterpart is mounted to cooperate with the respective magnetic actuators to move the respective segments in the axial direction. Each magnetic actuator comprises an electromagnet. Each ferromagnetic counterpart is arranged on a radial inner side of the associated segment. During rotation of the roller the roller segments and the associated counterparts follow a circular trajectory during a part of which they face the corresponding electromagnets.

A positioning and conveying device includes an endless conveyor belt which runs around two rollers mounted to a frame. The outer surface of the roller is defined by a plurality of roller segments which complementary cover the perimeter. The segments are individually movable in the axial direction for laterally moving the conveyor belt relative to the frame. The device includes at least one actuator assembly including a controllable magnetic actuator mounted at either end of the roller. At either end of the segments a ferromagnetic counterpart is mounted to cooperate with the respective magnetic actuators to move the respective segments in the axial direction. Each magnetic actuator comprises an electromagnet. Each ferromagnetic counterpart is arranged on a radial inner side of the associated segment. During rotation of the roller the roller segments and the associated counterparts follow a circular trajectory during a part of which they face the corresponding electromagnets.

To enable a bunch of sheets to be reliably discharged to a stack tray, also in the case where weight of the bunch of sheets formed on a processing tray is large, a post-processing control section receives information on an ink discharge amount, the number of sheets, sheet type, and printing mode (two-side/one-side) in printing on sheets from a main body control section of an image forming unit A, in forming a bunch of sheets on the processing tray. The control section thereby recognizes weight of a bunch of sheets formed on the processing tray, and when the section determines that the weight is heavier than predetermined weight, decreases a rotation velocity of a drive motor of a sheet bunch transport means, or increases a current amount applied to the drive motor. By this means, torque of the motor is increased, and the bunch of sheets is reliably discharged to the first stack tray.

To enable a bunch of sheets to be reliably discharged to a stack tray, also in the case where weight of the bunch of sheets formed on a processing tray is large, a post-processing control section receives information on an ink discharge amount, the number of sheets, sheet type, and printing mode (two-side/one-side) in printing on sheets from a main body control section of an image forming unit A, in forming a bunch of sheets on the processing tray. The control section thereby recognizes weight of a bunch of sheets formed on the processing tray, and when the section determines that the weight is heavier than predetermined weight, decreases a rotation velocity of a drive motor of a sheet bunch transport means, or increases a current amount applied to the drive motor. By this means, torque of the motor is increased, and the bunch of sheets is reliably discharged to the first stack tray.

Provided is a roller with pressure sensor. The roller includes a pressure sensor mounted to the roller. The pressure sensor includes a plurality of pressure sensing units distributed on a thin film. The pressure sensing units are electrically connected to each other with a metal wire but not in contact with each other. Also provided is a roll-to-roll device, which includes a roller mechanism and a pressure sensor.

Provided is a roller with pressure sensor. The roller includes a pressure sensor mounted to the roller. The pressure sensor includes a plurality of pressure sensing units distributed on a thin film. The pressure sensing units are electrically connected to each other with a metal wire but not in contact with each other. Also provided is a roll-to-roll device, which includes a roller mechanism and a pressure sensor.

A printer includes: a first fixed printhead; a second fixed printhead positioned downstream of the first printhead relative to a media feed direction; a platen for supporting print media; an input media transport mechanism positioned upstream of the first printhead, the input media transport mechanism exerting a gripping force N.sub.1 on print media; an output media transport mechanism positioned downstream of the second printhead, the output media transport mechanism exerting a gripping force N.sub.2 on print media; and an intermediary media transport mechanism positioned between the first and second printheads, the intermediary media transport mechanism exerting a gripping force N.sub.3 on print media. The gripping forces satisfy the relationship N.sub.1>N.sub.2>N.sub.3 for optimal printing results.

A liquid ejection apparatus, including: a conveyor; and an ejector to eject a liquid; wherein each of an upstream roller pair, a first downstream roller pair, and a second downstream roller pair of the conveyor includes upper and lower rollers to respectively contact front and back surfaces of a recording medium, at least one of the upper and lower rollers being configured to give a conveyance force to the recording medium, wherein a rotation speed of the second downstream roller pair is higher than that of the first downstream roller pair, and the conveyance force of the first downstream roller pair is larger than that of the second downstream roller pair, and wherein the conveyance force of the second downstream roller pair is largest at a position thereof in the first direction which is nearest to the central position of the second downstream roller pair.

An apparatus and a corresponding method for singling value documents includes: an input device which is devised for receiving a stack of value documents, a transport device which is devised for drawing a value document from a stack of value documents located in the input device, and a transport element, which is devised to influence the drawing of the value document from the stack of value documents. At least one sensor is provided which is devised to capture a size of the stack located in the input device, in particular a height of the stack and/or a fill level of the input device, and a density of the stack. A control device is devised to control the transport device and/or the transport element based on the captured size of the stack and/or the captured density of the stack.