A sheet conveying device, which is included in an image forming apparatus, includes a sheet holding roller to move while holding a sheet, a detector to perform a primary detection to detect a sheet position before the sheet holding roller holds the sheet and a secondary detection to detect a sheet position downstream from the sheet position detected by the primary detection, and a controller configured to cause the sheet holding roller to perform a first drive to move the sheet holding roller in at least one direction of a width direction of the sheet and a rotation direction in a sheet conveying surface based on a result of the primary detection and a second drive to move the sheet holding roller opposite to the at least one direction of the first drive, based on a result of the secondary detection.

Web handling apparatuses and methods are provided to passively control a lateral position of a moving web. The web wraps around support rollers adjacent opposed web edges. One or more guide rollers are positioned adjacent to the support rollers. The guide rollers are in rolling contact with the web edge to guide the moving, misguided web back into its desired lateral position.

A single nip de-skew, lateral registration, and process direction registration device removes skew, laterally registers, and registers in the process direction substrates moving along a media transport path. The single nip de-skew, lateral registration, and process direction registration device includes a fixed roller that is longer than a rotating wheel that forms a nip with the fixed roller. The wheel has a coefficient of friction that is higher than a coefficient of friction of the roller so an actuator translating the wheel along the fixed roller laterally registers and de-skews substrates.

A printer includes a printing unit having a printing head and a platen positioned opposite the printing head, the printing head being configured to print on a print medium that is fed between the printing head and the platen, a ribbon holding shaft configured to hold an ink ribbon that is wound thereon, a ribbon winding shaft configured to wind and collect the ink ribbon supplied from the ribbon holding shaft, and first and second guide shafts provided along a feeding route of the ink ribbon between the ribbon holding shaft and the ribbon winding shaft to apply tension to the ink ribbon. At least one of the first and second guide shafts has a tilt adjuster that applies a twist to the ink ribbon in a width direction of the ink ribbon through said at least one of the first and second guide shafts.

An image forming apparatus includes: an apparatus body including an image former that forms an image on a recording material; a covering part that is provided in the apparatus body and leaves an inside of the apparatus body open by being opened in an opening direction with respect to the apparatus body; a reversing unit that is housed by the apparatus body and discharges part of the recording material on which the image is formed by the image former externally of the apparatus body, and reverses a transport direction of the recording material; and a guiding unit that is provided adjacent to a downstream side of the covering part in the opening direction, guides the recording material discharged through the apparatus body by the reversing unit, and when the covering part is opened with respect to the apparatus body, the guiding unit moves relatively with respect to the covering part in an opposite direction of the opening direction.

Disclosed is an example of a registration assembly for a media processing device, including a registration surface. The registration assembly including a bias member coupled to the registration surface to bias the registration surface toward the media processing path to apply a force to a media unit. The registration assembly including an activator coupled to a roller, the roller to be driven via contact with the media unit. The activator configured to move the registration surface toward the media processing path into the active position to engage the media unit responsive to rotation of the roller in the first rotational direction. The activator configured to move the registration surface away from the media processing path into an inactive position responsive to rotation of the roller in the second rotational direction.

A belt-form body conveyor that conveys a belt-form body includes a plurality of non-contact guide portions over which portions of the belt-form body are wound, and that support the belt-form body in a non-contact manner, and a drive unit that, when viewed in a direction that is perpendicular to a surface of the belt-form body before the belt-form body is supplied to the plurality of non-contact guide portions, causes at least two non-contact guide portions out of the plurality of non-contact guide portions to rotate in the same direction and by the same angle.

A printer uses at least two centrally positioned single nip de-skew, lateral registration, and process direction registration devices to remove skew, laterally register, and register in the process direction substrates moving along a media transport path. The single nip de-skew, lateral registration, and process direction registration devices include a fixed roller having a low coefficient of friction and a length longer than a rotating wheel that forms a nip with the fixed roller having a high coefficient of friction to enable an actuator to move the rotating wheel along the fixed roller to laterally register and de-skew substrates.

A transmission device of a developing machine is disclosed. The transmission device includes a plurality of transmission units with bearing points thereof arranged on an identical surface to form a bearing surface for transmitting a substrate, and each of the plurality of transmission units comprises a supporting rotating axle and a roller connected with the supporting rotating axle, and the supporting rotating axle has a central rotating axis. A developing machine is also disclosed.

A sheet feeding device, which is included in an image forming apparatus, includes a roller detachably attached to the image forming apparatus and configured to feed a sheet in a sheet conveying direction, a shaft configured to engage with the roller and transmit a driving force to the roller, a movable body configured to rotate in a direction of rotational axis and includes a holding portion configured to engage with the second engaging portion of the roller and rotatably hold the roller and a guide configured to guide attachment of the second engaging portion of the roller to the holding portion, and a biasing body configured to apply a biasing force and bias the movable body from a drive receiving side to a drive transmitting side.