A cleaning device includes a separation and contact mechanism that separates a web from a conveyance roller and brings the web into contact with the conveyance roller, and a controller. The controller includes a conveyed sheet number determination unit and a separation and contact control unit. The conveyed sheet number determination unit monitors a conveyed sheet number of both-surface image forming sheets where image forming processing is applied to both a first surface and a second surface with respect to the sheets conveyed by the conveyance roller, and determines whether or not a cumulative value of the conveyed sheet number has reached a predetermined threshold value. The separation and contact control unit controls the separation and contact mechanism so as to allow the web to be pressed to the conveyance roller by a pressing roller when the cumulative value of the conveyed sheet number has reached the threshold value.

An image forming apparatus includes a controller that receives a print job, which includes the sheet type and print settings of simplex printing or duplex printing. A sheet stacked on a feeding unit is discharged to a discharge portion with an upper surface of the sheet facing different directions in duplex printing and in simplex printing in a first mode, and the sheet stacked on the feeding unit is discharged to the discharge portion with the upper surface of the sheet facing the same direction in the duplex printing and in the simplex printing in a second mode.

An image forming apparatus includes a main casing including an image forming unit and a discharge tray, and an optional device configured to be removably attached to the main casing. The main casing includes a conveying path through which a sheet is conveyed from the image forming unit, a discharge path through which the sheet is conveyed toward one of the discharge tray and the optional device, the discharge path diverging from the conveying path, and a return path including a first path through which the sheet is conveyed temporarily out of the main casing via an opening formed in the main casing, and a second path through which the sheet is conveyed toward the image forming unit. The first path diverges from the conveying path. The second path diverges from the first path. The optional device is disposed closer to the discharge tray than the opening.

A sheet conveying apparatus includes a paper re-feeding path, a switching member, a reversing roller, a paper discharge roller, a motor, and a revolution control mechanism. The switching member can be switched between a first position and a second position. The reversing roller can reverse a revolving direction thereof between a first revolving direction and a second revolving direction. The paper discharge roller revolves in a third revolving direction for conveying the sheet in a third conveying direction. The motor reverses the revolving direction of the reversing roller and switches the position of switching member by reversing the revolving direction thereof. The revolution control mechanism revolves the paper discharge roller in the third revolving direction with the revolution of the motor, regardless of the reversing of the revolving direction of the motor.

A sheet conveyance apparatus includes a first conveyance portion configured to convey a sheet, a second conveyance portion configured to convey the sheet, the second conveyance portion including an abutment portion configured to form a loop on the sheet by being abutted against a leading edge of a sheet conveyed by the first conveyance portion, a curved guide portion, which is curved, configured to guide the sheet conveyed by the first conveyance portion to the second conveyance portion, and a rotary member arranged downstream of the first conveyance portion and upstream of the second conveyance portion in a sheet conveyance direction, and configured to be driven to rotate by a surface of the sheet that is guided by the curved guide portion, the surface sliding against the curved guide portion.

A recording-medium transport device includes: a driving roller that rotates in a driving manner; a discharge-side driven roller that is externally in contact with the driving roller and guides a recording medium to a discharge path located downstream of the driving roller in cooperation with the driving roller; a duplex-path-side driven roller that is externally in contact with the driving roller and guides, in cooperation with the driving roller, the recording medium from the discharge path to a duplex printing path; and a projection projecting further toward the discharge path than an outer circumferential surface of the driving roller.

An image forming apparatus includes an image forming unit, a discharge unit, a double-sided conveyance path, a sheet plate, a skew correction unit, and a frame. The discharge unit discharges a sheet having an image from the image forming unit. The double-sided conveyance path conveys the sheet again to the image forming unit. The sheet plate restricts a position of an end, in a sheet width direction, of the sheet. The skew correction unit obliquely conveys the sheet to abut the sheet end. The frame determines a position of the sheet plate and includes a first positioning portion to position a sheet plate first positioned portion and a second positioning portion to position a sheet plate second positioned portion with the skew correction unit between the first and second positioned portion. The first positioning portion faces the first positioned portion and the second positioning portion faces the second positioned portion.

An image forming apparatus includes an image forming portion; a fixing device including a fixing member, a heating portion and a pressing member; a pressure switching mechanism configured to switch pressure between the fixing member and the pressing member; and a controller capable of executing an operation in an image forming mode in which the image is capable of being formed on the envelope by causing the pressure switching mechanism to switch the pressure to first pressure when an instruction to form the image on an address side of the envelope is inputted and by causing the pressure switching mechanism to switch the pressure to second pressure higher than the first pressure when an instruction to form the image on a non-address side of the envelope is inputted.

An image forming apparatus includes: an image forming unit that forms an image onto a recording medium; an image reading unit that is disposed above the image forming unit in an up-down direction, transports a document, and reads an image formed on the document; a first output section that is provided in a connection section connecting the image forming unit and the image reading unit to each other in the up-down direction and to which the document read by the image reading unit and transported in a width direction of the image forming unit is output; a second output section that is provided below the first output section in the connection section and to which the recording medium having the image formed thereon by the image forming unit is output; and a rotating member that serves as a front portion of the first output section in a depth direction of the image forming unit, is rotatable by a rotating shaft disposed at an upstream side in an output direction of the document, and switches between an output position from which the document is output and a descent position to which a downstream end of the rotating member in the output direction descends relative to the output position.

An image forming apparatus capable of making a match between the orientation of a reference side of a sheet along which punched holes are formed and the orientation of an output image on the sheet in double-sided printing. It is determined whether or not to rotate an image based on whether the image is printed in a single-sided printing mode or a double-sided printing mode. In the double-sided printing mode, a reverse-side image is printed on a first surface of the sheet, the sheet is conveyed into the printing section through a double-sided conveying path, a front-side image is printed on a second surface of the sheet, and the sheet is discharged. In the single-sided printing mode, an image for single-sided printing is printed on a first surface of the sheet, and the sheet is discharged.