A recording material transport system includes a first transport apparatus including a transport unit that transports a recording material and a notification unit that notifies a user about how to deal with a recording material whose transport has been stopped; and a second transport apparatus including a transport unit that transports a recording material transported from the first transport apparatus and a notification unit that notifies the user about how to deal with a recording material whose transport has been stopped, wherein in a case where a recording material has stopped in both of the first and second transport apparatus, the notification unit of the first transport apparatus notifies the user about how to deal with the recording material in the first transport apparatus, and the notification unit of the second transport apparatus notifies the user about how to deal with the recording material in the second transport apparatus.

An image forming apparatus includes an image forming unit, a fixing unit, first and second rotating members, and a discharge unit to discharge a recording material to an outside. The fixing unit fixes an image from the image forming unit onto the recording material. The first rotating member comes into contact with and guides the image bearing recording material, and is driven to rotate by conveyance of the recording material. The second rotating member comes into contact with the image bearing recording material more on a downstream side than the first rotating member in a conveyance direction of the recording material, guides the recording material, and is driven to rotate by conveyance of the recording material. The first rotating member does not perform swinging motion by coming into contact with the recording material, and the second rotating member performs swinging motion by coming into contact with the recording material.

An image forming apparatus including: a sheet feeding roller which feeds a sheet accumulated on a tray; and a hardware processor which: detects a movement speed of the sheet currently fed by the sheet feeding roller; and calculates a difference amount between the movement speed and a first reference speed, and determines a life of the sheet feeding roller based on the difference amount, wherein the hardware processor determines whether or not to use the movement speed of a first sheet for life determination based on a relationship between the movement speed of the first sheet and the movement speed of a sheet fed before the first sheet, and if the hardware processor determines not to use the movement speed of the first sheet for the life determination, the hardware processor calculates the difference amount by excluding the movement speed of the first sheet.

When a sheet jam is detected, a processor may perform the following process. In a case where a sheet is spanning a first conveyance path and a drawer unit, the processor maintains a lock unit in a locked state by supplying power to the lock unit via the drawer unit from a power supply without depending on whether a door is in an open state or a closed state. In a case where a sheet is not spanning the first conveyance path and the drawer unit, the processor controls supplying and disconnecting of power to the drawer unit from the power supply in accordance with whether the door is in a closed state or an open state.

An image forming apparatus includes lock mechanisms, a second detection processing portion, and a second release processing portion. The lock mechanisms regulate attachment and detachment of the developer storage portions attached to the attachment portions. The second detection processing portion detects whether or not any of the image forming units has an abnormality. The second release processing portion can release a regulation on attachment and detachment of two or more developer storage portions corresponding to two or more image forming units that include at least an image forming unit adjacent to the image forming unit detected to have the abnormality.

A sheet conveyance apparatus including a transmission unit that transmits an ultrasonic wave toward a sheet and a reception unit that receives the ultrasonic wave includes a change unit that changes a distance of a conveyance path of the sheet according to sheet information about the sheet to be conveyed.

An image forming apparatus includes an apparatus body, an image forming unit, an opening and closing cover, a fixed cover that constitutes a part of an exterior of the apparatus body with the opening and closing cover, and is configured to form a boundary portion with an upper edge of the opening and closing cover in a vertical direction, a positioning portion including a first engagement portion provided in the opening and closing cover, and a second engagement portion provided in the fixed cover, a first conveyance guide provided on the opening and closing cover, and a second conveyance guide provided on the fixed cover. The first engagement portion and the second engagement portion are configured to engage with each other to perform positioning of the opening and closing cover and the fixed cover in the vertical direction and positioning of the first conveyance guide and the second conveyance guide.

An image forming apparatus includes: a sheet conveyance unit which includes a sheet conveyance path and conveys a sheet; a sheet detector which detects the sheet in the sheet conveyance path; a job acquiring unit which acquires a print job related to the sheet; an image forming unit which forms an image on the sheet; and a processor which controls the sheet conveyance unit to perform one of first sheet conveyance and second sheet conveyance, the first sheet conveyance being performed to convey the sheet in accordance with sheet information, the second sheet conveyance being performed to convey the sheet and discharge the sheet to outside in accordance with a result of detection, wherein when sheet conveyance is resumed after suspension, the processor controls the sheet conveyance unit to perform the second sheet conveyance on a remaining sheet.

An image forming apparatus includes a main assembly; an image forming portion for forming an image on a sheet; an openable member rotatably supported by the main assembly; a first feeding guide provided on the openable member; a second feeding guide provided in the main assembly, wherein when the openable member is closed, a sheet feeding path for feeding the sheet is formed by the first and second feeding guides; a hole provided in the first feeding guide; and an illumination device, provided on the openable member, for illuminating at least a part of the second feeding guide through the hole when the openable member is open.

An image forming apparatus includes an image forming part, a canceling processing part, a first switching processing part and a second switching processing part. The canceling processing part is performable an image canceling operation where a toner image formed on an intermediate transferring member is removed from the intermediate transferring member without transferred to a sheet. The first switching processing part is capable of switching a printing mode in the image forming part between a plurality of printing modes having different printing conditions in the image forming part, based on an image data under waiting for printing and a predetermined first switching condition. The second switching processing part is capable of switching the printing mode based on the image data under waiting for printing and a predetermined second switching condition when the image canceling operation is performed.