A post-processing apparatus is connected to an image forming apparatus that forms an image on a sheet. The post-processing apparatus includes a post-processor, a sensor, and a controller. The post-processor performs post-processing on the sheet. The sensor is provided in a space where the post-processor operates and provides an output based on a presence of a foreign substance in the space. The controller acquires a first output value from the sensor prior to the image forming apparatus forming the image on the sheet, acquires a second output value from the sensor after the image forming apparatus forms the image on the sheet and before the post-processor performs the post-processing on the sheet, and determines whether or not the foreign substance is present in the space based on the first output value and the second output value.

An image processing device includes: a processor configured to obtain a positional deviation amount of an actual folding line from an expected folding line on a test sheet, and generate, based on the positional deviation amount, sheet image information including image data representing an image to be formed on a sheet, so as to change a position of the image.

An image processing device includes a processor configured to: obtain image information obtained by reading a sheet that is folded with an intention that a folding line is formed at a position apart from a sheet center position in a specific direction by a predetermined distance, using an image reading device in a state in which a short folded piece of the sheet faces a sensor surface; obtain positions of two edges that are opposite to each other across a folding back of the sheet in the image information; and detect a deviation amount of the folding line based on the positions of the two edges and the predetermined distance.

An image processing apparatus includes a processor configured to: acquire image information obtained by reading a folded sheet with an image reading device in a state where the folded sheet is unfolded; acquire first and second distances in the image information, the first and second distances being distances from first and second positions to a predetermined reference of the sheet, respectively, the first and second positions on a folding line of the sheet being separated by a predetermined distance; and detect an inclination of the folding line of the sheet based on the first and second distances.

A printing system includes a printing apparatus that prints an image on a sheet, a sheet processer that executes sheet processing, and a sheet detection sensor that detects a sheet on which the sheet processing is performed not in association with the printing of an image, where the printing of an image is restricted in response to detection of a sheet by the sheet detection sensor.

An image forming apparatus includes a printer engine configured to print a print image on a recording sheet based on image data, a post-processing device configured to perform post-processing on the recording sheet having the print image, and circuitry configured to perform following operation. The circuitry is configured to acquire print setting information; acquire information on a post-processing capability; generate a predicted image representing a state of the recording sheet applied with the post-processing, based on the image data, the print setting information, and the information on the post-processing capability; and display the predicted image.

In an example, a conditioner module may include a bridge to receive media from a media path of an imaging device and to deliver the media to a media input of a finisher module. The conditioner module may include a calender nip disposed at an output end of the bridge. The calender nip may compress the media and may feed the media into the media input of the finisher module.

A system may include a finishing device to receive a print job. The print job may move about a first axis of the finishing device. The system may further include a stapling device contained within the finishing device. The stapling device to move about a second axis of the finishing device, and the second axis may be perpendicular to the first axis. A sensor may be located on the stapling device to identify a first edge of the print job. The first edge of the print job may be a leading edge of the print job as the print job moves about the first axis.

A determination device (1) includes a first storage unit (10), a determination unit (12), an input unit (13), and an update unit (14). The first storage unit (10) stores one or more processing rules of a post-printing processor (4) predetermined based on processing know-how for a post-printing process. The input unit (13) receives input of information about an update of the processing rules. The update unit (14) updates the processing rules stored in the first storage unit based on the input of information about the update of the processing rules. The determination unit (12) determines whether a post-printing processing instruction information generated by a pre-printing processor (2) satisfies the one or more processing rules.

An image processing apparatus includes a processor configured to: acquire image information obtained by an image reading apparatus including an illumination unit having an uneven balance in an amount of light in a sub-scanning direction; and specify a position of a folding line in a sheet from the acquired image information. The acquiring by the processor includes acquiring first image information obtained by reading the sheet in a first state in which the folding line in the sheet is positioned in a direction intersecting the sub-scanning direction of the image reading apparatus, and second image information obtained by reading the sheet in a second state in which the sheet is directed to an opposite side to a side in the first state. The specifying by the processor includes specifying the position of the folding line in the sheet based on the first image information and the second image information.