An image forming apparatus includes a storage device, an input device, and a processor. The storage device prestores first size information indicating a prescribed size of a first sheet and margin information indicating a margin region provided in the first sheet. The processor determines, on the basis of the first size information and the second size information, the image forming condition for forming the margin region indicated by the margin information on the second sheet.

An image forming system includes an image forming apparatus including a housing where an image forming unit is provided and a strain detector, a hardware processor, and a storage. The strain detector detects strain of a bottom plate of the housing. The processor and the storage are included in or provided outside the image forming apparatus. The processor obtains a first detection signal from the detector, stores strain measured data based on the first detection signal as reference data in the storage, obtains a second detection signal from the detector after storing the reference data, compares strain measured data based on the second detection signal with the reference data, and determines whether adjustment of a supporting point height of the bottom plate to reduce the strain due to change over time from a time of the obtainment of the reference data is required.

An image forming apparatus is provided with USB sockets on front and back sides, and includes a determining unit for determining whether or not a USB device inserted to a front side USB socket is a function enhancement device, and a control unit making, when it is determined by the determining unit that a function enhancement device is inserted to the front side USB socket, the USB device unusable and making, when it is determined that a USB device other than the function enhancement device is inserted, the USB device usable. Thus, it is possible to prevent a USB wireless LAN adapter or the like from being used constantly connected to the front side USB socket and thereby to reduce possibility of USB wireless LAN adapter of being damaged or removed.

An image forming apparatus is provided with USB sockets on front and back sides, and includes a determining unit for determining whether or not a USB device inserted to a front side USB socket 184 is a function enhancement device, and a control unit making, when it is determined by the determining unit that a function enhancement device is inserted to the front side USB socket 184, the USB device unusable and making, when it is determined that a USB device other than the function enhancement device is inserted, the USB device usable. Thus, it is possible to prevent a USB wireless LAN adapter or the like from being used constantly connected to the front side USB socket and thereby to reduce possibility of USB wireless LAN adapter of being damaged or removed.

An image forming apparatus includes: a print processing portion that executes print jobs transmitted from a plurality of information processing apparatuses, according to a predetermined execution order; a human detecting portion that detects a presence of a human within a predetermined specific range from the image forming apparatus; a job identifying portion that identifies, from the print jobs, a first print job that corresponds to the human detected by the human detecting portion; a job detecting portion that detects, from the print jobs, a presence of a second print job that was transmitted from any of one or more second information processing apparatuses that have been grouped into the same group as a first information processing apparatus that is a transmission source of the first print job identified by the job identifying portion; and a notification processing portion that notifies the presence of the detected second print job.

An image forming apparatus is configured to obtain information indicating the capacity of a toner container. In accordance with the obtained information, a gamma table for correcting the luminance value of a printing-target image is determined and the luminance value of the image is corrected by using the determined gamma table.

An image forming apparatus includes a detection section, an identification section, an acquisition section and a restriction section. The detection section detects an approach of a user. The identification section identifies the user detected by the detection section. The acquisition section acquires statistics determined from a use count of the user identified by the identification section. The restriction section restricts execution of a warm-up control based on the statistics acquired by the acquisition section.

When a first image forming apparatus 1 cannot perform printing based on a print instruction from a user, the first image forming apparatus 1 (a1) makes a substitution printing request to a second image forming apparatus 2 and (a2) receives a temporary authentication ID from this second image forming apparatus 2 and notifies the user of it if the user is not managed by an authentication server 4 that manages this second image forming apparatus 2. If the user is not managed by the authentication server 4 and not authenticated when receiving the substitution printing request, the second image forming apparatus 2 (b1) requests the authentication server 4 to issue the authentication ID, (b2) receives the authentication ID and notifies the apparatus 1 of it, and (b3) receives a user inputted authentication ID and performs the printing if the inputted authentication ID is identical to the received one.

An image forming apparatus includes: a print processing portion that executes print jobs transmitted from a plurality of information processing apparatuses, according to a predetermined execution order; a human detecting portion that detects a presence of a human within a predetermined specific range from the image forming apparatus; a job identifying portion that identifies, from the print jobs, a first print job that corresponds to the human detected by the human detecting portion; a job detecting portion that detects, from the print jobs, a presence of a second print job that was transmitted from any of one or more second information processing apparatuses that have been grouped into the same group as a first information processing apparatus that is a transmission source of the first print job identified by the job identifying portion; and a notification processing portion that notifies the presence of the detected second print job.

The present disclosure provides an image-forming device, and a method and a controller for controlling the image-forming device. The method is executed by the controller of the image-forming device. The method includes when a first sensor disposed in the image-forming device is abnormal, determining, by the controller, an environmental parameter in real-time through one or more target apparatuses disposed in the image-forming device, where the environmental parameter includes at least one of temperature and humidity; and the first sensor is configured to detect the environmental parameter inside the image-forming device; and according to the environmental parameter in real-time, adjusting, by the controller, a control parameter when the image-forming device forms images.