A managing apparatus includes a processor configured to use continuous paper strips as recording media, receive multiple print jobs having different print speeds, and create print groups into which the multiple print jobs are classified according to print speed.

A controller is configured to control a drive unit and a heating element to execute a first mode and a second mode. The first mode is a mode in which the sheet is conveyed through a predetermined conveyance section in a duplex image formation by taking a first time length. The second mode is a mode in which the sheet is conveyed through the conveyance section in the duplex image formation by taking a second time length longer than the first time length. In the second mode, the controller is configured to execute a temperature decrease processing and thereafter execute a temperature increase processing in a period in which the sheet is conveyed through the conveyance section.

According to one embodiment, an image forming apparatus includes: a registration roller; a motor configured to drive the registration roller; and a controller configured to control the motor. The registration roller is disposed at a first position on a conveyance path of paper on which an image is to be formed, and sends out the paper toward a second position on the conveyance path. The second position is downstream from the first position on the conveyance path and is an image transfer position on the paper. The controller controls the motor by using both speed control and position control when the leading end of the paper is at a position from the first position to the second position, and controls the motor by using only the speed control when the leading end of the paper reaches the second position.

An image forming apparatus includes: an image holding section; a transfer section that includes a transfer member, applies a transfer electric-field to a transfer region between the image holding section and the transfer member, and electrostatically transfers an image held by the image holding section onto a recording medium; a contact section that acts as an electrode to ground while being in contact with the recording medium when the recording medium passes through the transfer region; a first resistance detection section; a second resistance detection section; a comparison section that compares a first system resistance detected by the first resistance detection section with a second system resistance detected by the second resistance detection section; and a switching section that switches between constant voltage control and constant current control for the transfer electric-field produced by the transfer section depending on a result of comparison by the comparison section.

According to one embodiment, an image forming apparatus includes: a registration roller; a motor configured to drive the registration roller; and a controller configured to control the motor. The registration roller is disposed at a first position on a conveyance path of paper on which an image is to be formed, and sends out the paper toward a second position on the conveyance path. The second position is downstream from the first position on the conveyance path and is an image transfer position on the paper. The controller controls the motor by using both speed control and position control when the leading end of the paper is at a position from the first position to the second position, and controls the motor by using only the speed control when the leading end of the paper reaches the second position.

An image forming apparatus includes a load detection sensor located on a feeder to detect whether a print medium is loaded on the feeder, an overload detection sensor to detect an overload state of a discharger, and a controller to detect a width of the print medium according to a combination of a feeder load state of a feeder load detection signal of the load detection sensor and an overload state of a discharger overload detection signal of the overload detection sensor and control an image former to perform printing by applying different print modes according to the detected width of the print medium.

An image forming device includes a sheet feeding device, an image forming part, a fixing device, a conveyance path, a first sensor and a second sensor. The first sensor is disposed on the conveyance path on a downstream side of the fixing device in the conveyance direction and detects the sheet passed along the conveyance path. The second sensor is disposed on the conveyance path on an upstream side of the fixing device in a conveyance direction and detects the sheet passed along the conveyance path. The fixing device stops a driving of a heating source and stops a rotation of a fixing belt when the first sensor does not detect the sheet passing properly. The fixing device stops the driving of the heating source and stops the rotation of the fixing belt after a predetermined period when the second sensor do not detect the sheet passing properly.

An image forming apparatus includes: an image formation unit configured to form an image on a sheet at a formation position; a circulatory conveyance path for conveying the sheet with the image formed at the formation position on a first side thereof, to the formation position again; a reading unit configured to read the first side of the sheet conveyed through the circulatory conveyance path, and output image information; and a conveyance control unit configured to convey the sheet in one conveyance mode out of a plurality of conveyance modes when the reading unit reads the first side of the sheet, wherein a range, in a conveyance direction, of the sheet that can be read by the reading unit while a conveyance speed of the sheet is constant is different for each of the plurality of conveyance modes.

The number of circulatable sheets and the conveying speed of a sheet are decided by referring to a storage unit which stores the number of circulatable sheets and the conveying speed of a sheet in correspondence with the type and size of a sheet, and the resolution of an image to be printed. It is determined whether the conveying speed of the feed surface of a sheet to be fed next to the printing unit and that of a feed surface to be refed next to the printing unit coincide with each other. It is determined whether the conveying speed of the feed surface of the sheet to be fed next to the printing unit and that of the feed surface or the refeed surface of a sheet immediately previously fed to the printing unit differ from each other.

An image forming apparatus includes a fixing device and a controller. The fixing device includes a heating unit and a pressurizing unit. The heating unit is configured to come into contact with a recording medium, onto which an image is transferred and which is transported, so as to heat the recording medium while rotating. The pressurizing unit is configured to press the recording medium against the heating unit. The fixing device is configured to fix the image to the recording medium. The controller is configured to control switching between a first mode for fixing the image to the recording medium and a second mode for making a transport speed of a sheet member that passes through the fixing device slower than a peripheral speed of the heating unit.