An image forming apparatus includes a flag, a sensor, a loop controller, a detector, and an image controller. The flag is disposed between the first and second conveying units and moves when in contact with a recording material having a loop. A signal value output from the sensor varies per a flag position. The loop controller changes a recording material speed based on the signal value output. The detector detects the recording material or an image formed on the recording material and the image controller changes an image forming condition based on the detection. The detector includes first and second contacting members that move to nip the recording material. A position of the flag, for changing a signal value output from the sensor, is included in a range in which first and second contacting members are movable.

An image forming apparatus is connected to a paper processing apparatus and includes an image forming unit, a nip part and a hardware processor. The image forming unit performs image forming on continuous paper being conveyed on a conveyance path. The nip part nips the paper on the conveyance path. The processor selectively performs first control and second control according to an output timing of a conveyance control signal if the signal is output from the paper processing apparatus or the image forming apparatus. In the first control, the processor notifies the paper processing apparatus of permission to start or stop conveying the paper after causing the nip part to perform a press-and-contact operation or a separation operation. In the second control, the processor notifies the paper processing apparatus of the permission without causing the nip part to perform either operation.

An image forming apparatus includes an image forming portion for forming a toner image on a sheet; a fixing portion for heating and fixing the toner on the sheet; and a controller for controlling the apparatus which is operable to form an image on the sheet having a first size and the sheet having a second size smaller than the first size. When a print instruction on the sheet of the first size during a period in which a print is formed on the sheet of the second size at a first throughput, the controller controls the apparatus so as to print on the sheet of the second size at a second throughput which is lower than the first throughput.

An image forming apparatus comprises an image forming section; a fixing device; an input section; a storage section which stores a target temperature of the fixing device in a case of carrying out the fixing processing and a target temperature of the fixing device in a case of carrying out the erasing processing; and a control section which controls to read out lower one of the target temperature of the fixation and the target temperature of the erasure from the storage section to set the lower one to the target temperature of the fixing device in a case in which the processing information of the fixing processing and the erasing processing is input by the input section and the processing is continuously carried out, and drive the fixing device via the driving section at a driving speed corresponding to each of the fixing processing and the erasing processing.

In one embodiment, an image forming apparatus has an image forming device, a discharge port of a recording medium, a conveying device of the recording medium, and a controller. The controller judges a kind of the recording medium and the discharge port that is a conveying destination of the recording medium. The controller controls a conveying speed of the recording medium to be discharged from the discharge port by the conveying device, in accordance with the kind of the recording medium and the conveying destination of the recording medium which have been judged.

An image processing apparatus includes a memory device that stores a set of instructions and at least on processor that executes the set of instructions to set a sampling condition under which a pixel of an image is sampled based on information indicating at least a number of bits of a pixel of the image, to sample a pixel of the image based on a set sampling condition, and to analyze the image based on sampled pixel data. When a number of bits of a pixel of the image is greater than or equal to a predetermined number of bits, a sampling condition is set so that a sampling interval becomes greater than that in a case when a number of bits of a pixel of the image is less than the predetermined number of bits.

An image forming apparatus includes an image forming device, a fixing device including a first rotary member of which a surface layer containing a fluororesin is brought into contact with a sheet surface having an unfixed toner image formed by the image forming device, and a controller. In a case that image formation processing for continuously forming a toner image on a plurality of predetermined sheets is executed, the controller can control conveyance of a sheet so that a portion of the surface layer of the first rotary member which is brought into contact with a trailing edge of a preceding sheet is brought into contact with a margin area on a leading edge side on a next sheet.

An image forming apparatus includes a print speed determination section and a print speed control section. The print speed determination section determines, on the basis of at least one of a shape, a size and a conveyance direction of a second image formed medium where image formation on the second image formed medium is conducted after image formation on a first image formed medium, whether a timing when the first image formed medium reaches a fixing section is later than a predetermined timing. The print speed control section controls, on the basis of a determination result of the print speed determination section, the timing when the first image formed medium reaches the fixing section.

An image forming apparatus include a transport unit, a tension adjusting unit, a transfer unit, a fixing unit, and a controller. The transport unit transports continuous paper. The tension adjusting unit adjusts tension of the continuous paper being transported by the transport unit. The transfer unit transfers an image to the continuous paper transported by the transport unit. The fixing unit fixes the image transferred by the transfer unit onto the continuous paper. The controller controls, in a case where the fixing unit is driven in a state in which the fixing unit is separated from the continuous paper and a difference between a transport speed of the transport unit and a fixing speed of the fixing unit has reached a predetermined range, the fixing unit to be in press-contact with the continuous paper.

An image forming apparatus including: a container unit configured to contain a recording material; an image forming unit configured to perform image formation onto the recording material conveyed from the container unit; a control unit configured to perform a preparatory operation for the image formation at an image forming speed before the image forming unit performs the image formation onto the recording material; and a first detection unit configured to detect a size of the recording material contained in the container unit, wherein the control unit is configured to judge whether to execute the preparatory operation based on the size of the recording material detected by the first detection unit.