A rotary frame construction for web transport control devices, includes a carrier frame and a rotary frame in parallel therewith and carrying input and output rollers for a web and pivotably mounted on the carrier frame about a rotation center defined by control surfaces of one frame, the control surfaces scanned by cam followers on the other frame, the frames held in parallel alignment by support rollers on one frame and run surfaces on the other frame, the frames pivotally connected with one another by a drive system, the control surfaces constituted by three control curves formed at outer edges of a cam plate rigidly held on one frame, two of the control curves located on one side of the cam plate and the third on the opposite side of the cam plate, and the other frame has three cam followers respectively associated with one of the control curves.

An image forming system includes: a sheet conveying section configured to convey a long sheet; an image forming/fixing section configured to execute an image forming/fixing operation to form and fix a toner image on the long sheet to be conveyed by the sheet conveying section; a skew detection section configured to detect a skew of the long sheet to be conveyed by the sheet conveying section; a skew correction section configured to execute a skew correction operation to correct the skew of the long sheet; and a control section configured to perform control to execute the skew correction operation when the skew has been detected in a first area where the skew correction operation does not affect the image forming/fixing operation, and perform control to execute the skew correction operation when the skew has been detected in a second area where the skew correction operation affects the image forming/fixing operation.

An image forming apparatus includes an apparatus main body, a sheet feed cassette, and a conveyance unit. The sheet feed cassette is attachably/detachably supported by the apparatus main body. The sheet feed cassette includes pressing portions provided on both sides thereof in the sheet width direction. The movable guide includes pressed portions provided on both sides thereof in the sheet width direction. By the pressed portions abutting on the pressing portions, the movable guide is pushed up by the sheet feed cassette, and the movable guide is positioned with respect to the fixed guide. The pressing portion provided on another side of the sheet feed cassette in the sheet width direction includes an adjusting mechanism that adjusts pressing force against the pressed portion provided on another side of the movable guide in the sheet width direction to enable adjustment of pressure abutment force between the conveyance rollers.

An apparatus for steering a web, including a web path having at least one steering roller and an exit roller, each having a mount; wherein the steering roller(s) each have an axis of rotation and wherein the mounts for the steering roller(s) can pivot those axes with a total of two degrees of freedom. An array comprising a plurality of sensors for monitoring the position of the web is present connected to a controller so as to determine the position and angular orientation of the web. The controller adjusts the pivot(s) of the mount(s) so as to control the angular orientation and the lateral position of the web at a particular point along the web path.

A placement station for placing flat items has multiple transport elements extending through a related opening in a placement deck of the placement station. All transport elements are driven by a single drive motor via toothed belt discs and toothed belts. At least one trigger sensor is arranged in the placement station on the exit side of the mail-item flow. The drive motor and the trigger sensor are electrically connected with means for controlling the transport speed of the flat items. Each transport element is carried by a transport module. The placement station has multiple transport modules, each extending with a transport element mounted on its head side through a related opening in a placement deck of the placement station. The transport modules are lowerable below the placement deck in a direction contrary to a spring force. The direction of traction can be changed by turning at least one transport module before or during operation of the placement station. Each transport element has a barrel-shaped body with an equator, wherein different friction values of said body of the transport element are provided on both sides of the equator. The transport modules are directionally positioned such that the half of the body of the transport element with the higher friction value is closest to the alignment wall.

A conveyor includes: a first roller; a second roller opposed to the first roller; a roller holder including a roller supporter; a frame supporting the roller holder and having a first surface and second surface; and a moving member that is moved to move the roller supporter. The roller holder includes: a contact portion that is located upstream of the roller supporter in a conveying direction and contacts the second surface; a thin portion disposed between the roller supporter and the contact portion; and an engaging portion engaged with the moving member at a position located downstream of the thin portion in the conveying direction. The roller supporter is moved from a first position to a second position by bending of the thin portion, which bending is caused when the engaging portion is moved away from the second roller with movement of the moving member.

A sheet conveying device includes a correcting portion and a side end detecting portion for detecting a side end of a sheet. The correcting portion includes a first roller whirlable about a first axis in a crossing direction crossing a conveyance direction and a widthwise direction and for correcting a position of the sheet in the widthwise direction, and a second roller disposed at a position different from the first roller in the widthwise direction, whirlable about a second axis in the crossing direction and for correcting the position of the sheet. Based on a detection result of the side end detecting portion, a control portion executes a first control in which the correcting portion corrects the position of the sheet in the widthwise direction and executes a second correcting control in which the correcting portion corrects the position of the sheet after the first correcting control.

A sheet post-processing apparatus includes a processing tray, a shift member, a discharge tray, a discharge roller pair, and a pressing member. The shift member moves a sheet loaded on the processing tray in a sheet width direction. The discharge roller pair discharges a sheet on the processing tray onto the discharge tray. The pressing member presses down a sheet discharged onto the discharge tray. The pressing member has an arm portion which rotates in the sheet conveyance direction about a rotation fulcrum, and a roller which is attached to the arm portion to be rotatable in the sheet width direction, and the pressing member is selectively disposed in a first position where the roller presses down the upstream-side end part of a sheet discharged onto the discharge tray, or in a second position where the roller contacts a lower surface of a sheet on the processing tray.

An image forming apparatus includes an apparatus main body, a sheet feed cassette, and a conveyance unit. The sheet feed cassette is attachably/detachably supported by the apparatus main body. The sheet feed cassette includes pressing portions provided on both sides thereof in the sheet width direction. The movable guide includes pressed portions provided on both sides thereof in the sheet width direction. By the pressed portions abutting on the pressing portions, the movable guide is pushed up by the sheet feed cassette, and the movable guide is positioned with respect to the fixed guide. The pressing portion provided on another side of the sheet feed cassette in the sheet width direction includes an adjusting mechanism that adjusts pressing force against the pressed portion provided on another side of the movable guide in the sheet width direction to enable adjustment of pressure abutment force between the conveyance rollers.

A conveyor includes: a first roller; a second roller opposed to the first roller; a roller holder including a roller supporter; a frame supporting the roller holder and having a first surface and second surface; and a moving member that is moved to move the roller supporter. The roller holder includes: a contact portion that is located upstream of the roller supporter in a conveying direction and contacts the second surface; a thin portion disposed between the roller supporter and the contact portion; and an engaging portion engaged with the moving member at a position located downstream of the thin portion in the conveying direction. The roller supporter is moved from a first position to a second position by bending of the thin portion, which bending is caused when the engaging portion is moved away from the second roller with movement of the moving member.