A printing apparatus capable of conveying sheets to a sheet processing apparatus and to control the type of a sheet to be used as a cover sheet in a case where a book bound product is generated by switching back sheets each having an image printed, inverting the sheets and folding the inverted sheets, and to notify an error to a user based on the type of a sheet to be used as the cover sheet in a case where printing an image on the cover sheet is designated.

An electronic device is provided with an operation panel, a communication unit, and a processing unit. The operation panel has a first operation key and a second operation key within a specific region. The communication unit is arranged within the specific region of the operation panel, and is a location for communicating wirelessly with a mobile terminal that is in a state opposing the specific region. The processing unit determines whether an operation result of the second operation key is valid or invalid on the basis of operations of the first operation key and the second operation key in such a way that the operation result of the second operation key is invalidated in a case where the first operation key has been operated.

An image forming apparatus includes a paper reading section, a similarity judgment section, and a control section. Between a downstream side in a paper conveyance direction of the paper feed section and a position where image formation is performed, the paper reading section reads an existing image already formed on a surface opposite to a formation surface of a new image newly formed on paper by an image formation section. Based on image data of the new image and image data of the existing image obtained by the image formation section, the similarity judgment section judges similarity between the both images. The control section, upon judging that the similarity is high, causes a pattern image to be formed on a surface of the paper where the existing image is formed, and upon judging that the similarity is not high, does not cause the pattern image to be formed.

An image forming apparatus includes a paper reading section, a similarity judgment section, and a control section. Between a downstream side in a paper conveyance direction of the paper feed section and a position where image formation is performed, the paper reading section reads an existing image already formed on a surface opposite to a formation surface of a new image newly formed on paper by an image formation section. Based on image data of the new image and image data of the existing image obtained by the image formation section, the similarity judgment section judges similarity between the both images. The control section, upon judging that the similarity is high, causes a pattern image to be formed on a surface of the paper where the existing image is formed, and upon judging that the similarity is not high, does not cause the pattern image to be formed.

When a job for executing both of a one-sided printing and a two-sided printing, the lowering of the productivity is suppressed and an output result a user desires is output.

A multifunctional printer having a printer section, an auto document feeder, a scanner section, a print path, and a path guide. When the multifunctional printer is not in a print and scan mode, the path guide can move to a position that routes printed paper from the print path to a print output tray. When the multifunctional printer is not in a print and scan mode, the path guide can move to a position that routes printed paper from the print path to the auto document feeder, where it can be scanned.

An electronic device is provided with an operation panel, a communication unit, and a processing unit. The operation panel has a first operation key and a second operation key within a specific region. The communication unit is arranged within the specific region of the operation panel, and is a location for communicating wirelessly with a mobile terminal that is in a state opposing the specific region. The processing unit determines whether an operation result of the second operation key is valid or invalid on the basis of operations of the first operation key and the second operation key in such a way that the operation result of the second operation key is invalidated in a case where the first operation key has been operated.

An image processing apparatus includes a platen on which a document to be read is placed, an image input unit configured to read, at a time, one or a plurality of documents placed on the platen, an individual image extraction unit configured to extract individual images of the one or the plurality of documents read at a time, an individual image location judgment unit configured to determine whether the extracted individual images are each located within one of areas set in a reading area of the platen depending on the number of documents to be read, and an individual image selection unit configured to, in a case where one or a plurality of the extracted individual images are located within a particular area, select one individual image as an image to be captured in the area based on a predetermined selection criterion.

A control apparatus includes a grouping unit configured to divide a plurality of sheets, each associated with a plurality of pages included in a processing target job into groups, and a control unit to control feeding of a sheet from a feeding unit onto a conveyance path and refeeding of a sheet that has been conveyed on the conveyance path onto the conveyance path. The grouping unit sets a group size that is not less than a maximum sheet size used in the processing target job, and the grouping unit decides the group of the predetermined page as the first group. The grouping unit also decides the group of the predetermined page as a second group different from the first group, and the control unit controls feeding and refeeding for each group grouped in the grouping unit.

A multifunctional printer having a printer section, an auto document feeder, a scanner section, a print path, and a path guide. When the multifunctional printer is not in a print and scan mode, the path guide can move to a position that routes printed paper from the print path to a print output tray. When the multifunctional printer is not in a print and scan mode, the path guide can move to a position that routes printed paper from the print path to the auto document feeder, where it can be scanned.