According to an example, to eject print media from an image forming apparatus, a variable page feed velocity of a first page of print media exiting a feed zone is detected. An acceleration value and a deceleration value based on the variable page feed velocity of the first page is calculated. The calculated acceleration is applied to a media movement component in the output zone when the entire first page has cleared a media sensor in the front of the output zone, and the deceleration is applied when the tail end of the first page is in a brake zone. In some examples, a second page of print media and a variable page feed velocity of the second page exiting the feed zone is detected, and the media movement component in the output zone is accelerated to match the variable page feed velocity of the second page.

An image forming device is provided. The image forming device includes: a conveyance unit that conveys a continuous paper, an image forming unit that forms an image on a continuous paper conveyed by the conveyance unit, a job selection unit that selects a job to be executed, and a processor that calculates an image forming distance and indicates the calculated image forming distance on a display. The image forming distance is a length in a conveyance direction of the continuous paper needed to execute the selected job.

An image forming apparatus includes a conveyance portion, a printing portion, a delay storage portion, a control portion, an input portion, and a display portion. The delay storage portion can store delay information. The control portion performs a measurement mode. The input portion receives instructions to start and end the measurement mode. When an instruction to perform the measurement mode is entered, the control portion deletes the delay information stored in the delay storage portion and stores the delay information generated thereafter during printing in the delay storage portion. When an instruction to end the measurement mode is entered, the control portion displays on the display portion delay information on predetermined irregular delay factors that occur irregularly during printing, out of the delay information stored in the delay storage portion.

A sensor is located upstream of a conveyance roller in a sheet conveyance direction. A switch switches driving and stopping of a photosensitive drum. A controller performs a first mode process as a warm-up process of driving the conveyance roller and a fuser. The first mode process includes: driving the photosensitive drum for a particular time; in response to detecting a sheet within the particular time by the sensor, controlling the switch to continue driving the photosensitive drum after the particular time elapses and to discharge the detected sheet to a sheet discharge tray; and in response to not detecting the sheet within the particular time by the sensor, controlling the switch to stop driving the photosensitive drum at a time point when the particular time elapses, and driving the conveyance roller and the fuser to complete the warm-up process in a state where the photosensitive drum is stopped.

An image forming apparatus includes a photosensitive member; an exposure portion configured to expose the photosensitive member to light depending on image information to form a latent image on the photosensitive member; a developing portion configured to develop the latent image into a toner image with toner; and a transfer portion configured to transfer the toner image from the photosensitive member onto a recording material. The image forming apparatus changes a surface movement speed of the photosensitive member at timing prior to predetermined timing, when a moving speed of a recording material at the transfer portion changes, by a predetermined time.

An image forming apparatus includes an image bearing member, an image forming portion, an endless belt, a plurality of stretching rollers including an inner roller, an outer roller, a position changing mechanism capable of changing a position of the inner roller to a first position and a second position positioned downstream of the first position with respect to a rotational direction of the endless belt, a feeding member, a feeding member driving portion, and a controller. A feeding start timing of a recording material by the feeding member depends on the position of the inner roller during transfer of a toner image onto the recording material.

An image forming apparatus includes first and second conveyance and calculation units, a reverse unit, a control unit, an image forming unit, and a stack unit to stack sheets. A recording material is conveyed from the stack unit to the image forming unit. The recording material is conveyed reversely, and is conveyed to a double-sided conveyance path and to the image forming unit. Without causing a recording material to wait in the reverse unit, a first recording material is conveyed from the stack unit, then a second recording material is conveyed, and subsequently a third recording material is conveyed. A conveyance interval time and a maximum waiting time are calculated. When the conveyance interval time exceeds the maximum waiting time, the second recording material conveyance starts at timing based on a waiting time after conveyance of the first recording material, and the third recording material conveyance starts at a timing.

An image forming apparatus includes a registration unit, a first paper feeding unit, a second paper feeding unit, and a control unit, which performs a primary paper feeding for conveying a paper sheet to a registration position, finishes the primary paper feeding at timing when the paper sheet reaches the registration position, and then after operating a target paper feeding unit until a preceding feeding time elapses, performs a secondary paper feeding for conveying the paper sheet to the printing position. The control unit sets different values of the preceding feeding time for the case where the first paper feeding unit is the target paper feeding unit and the case where the second paper feeding unit is the target paper feeding unit.

An image forming apparatus includes a photosensitive member; an exposure portion configured to expose the photosensitive member to light depending on image information to form a latent image on the photosensitive member; a developing portion configured to develop the latent image into a toner image with toner; and a transfer portion configured to transfer the toner image from the photosensitive member onto a recording material. The image forming apparatus changes a surface movement speed of the photosensitive member at timing prior to predetermined timing, when a moving speed of a recording material at the transfer portion changes, by a predetermined time.

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.