In example implementations, a printer module is provided. The printer module includes a co-axial split drive roller, a first motor, a second motor, and a print bar. The co-axial split drive roller includes a first roller and a second roller that are movably coupled at a center of the co-axial split drive roller. The first motor is coupled to the first roller. The second motor is coupled to the second roller. The print bar is coupled to the housing over the co-axial split drive roller.

A medium supply device is provided that includes a single sheet paper accommodating unit at which media are stacked and placed, and a feeding roller configured to feed the media by rotating in contact with a top surface of the placed media. The feeding roller includes a contact portion configured to contact the single sheet paper and a non-contact portion configured to not contact the single sheet paper in a rotational direction, and a plurality of the contact portions and the non-contact portions are provided in a first direction that is an extending direction of a rotation axis of the feeding roller, and the contact portions adjacent to each other in the first direction are out of phase in the rotational direction.

A stripper assembly can include a feed wheel, a stripping tire, a drag clutch, and first and second stripping elements. The feed wheel and stripping tire can be mounted for rotation in clockwise (CW) and counter-clockwise (CCW) directions and can contact one another to define a nip through which papers are directed. The drag clutch can be interposed between the stripping tire and the shaft it is mounted upon. The first and second stripping elements can be positioned on the shaft of the stripping tire on opposite sides of the nip. Each of the stripping elements can be configured and positioned to engage papers passing through the nip. The drag clutch is not interposed between either of the first and second stripping elements and the shaft of the stripping tire.

A sheet conveyance device includes a conveyance roller pair. A skew correction roller pair conveys the sheet after contacting two nip portions, and a sheet skew is corrected in a state in which the skew correction roller pair is being stopped. The sheet having a toner image is bent by a first conveyance guide such that a sheet first surface becomes an inside surface. The sheet is bent by the first and second conveyance guides to cause the sheet first surface to be the inside surface and a sheet second surface to be an outside surface. The skew correction roller pair includes two first rotary members of a first roller. A second roller and the two first rotary members form the two nip portions. The second roller and the first conveyance guide contact the sheet first surface. The first roller and the second conveyance guide contact the sheet second surface.

Disclosed is a guiding device having a guide roller that is rotatable about a roller axis and that has an exterior guide surface extending in a circumferential direction about the roller axis, wherein the guide roller includes a plurality of roller segments juxtaposed in an axial direction along the roller axis for forming the exterior guide surface, wherein the plurality of roller segments are movable relative to each other to enable the guide roller to be positioned in a maximum bend state in which the roller axis extends along an arc, wherein the plurality of roller segments are interlocked to rotate together about the roller axis in a maximum bend state, wherein the plurality of roller segments extend over an arc length along the arc of the roller axis, wherein the arc length is at least ninety degrees in the maximum bend state.

A roller for guiding a sheet (101) by friction has a contact surface (2) designed to be in contact with the sheet (101), the contact surface (2) having, overall, a shape of revolution when the roller (1) is at rest, a central portion (6) configured to mechanically connect the roller (1) to a rotating drive element, and a deformation portion (10) located between the contact surface (2) and the central portion (6), the deformation portion (10) being configured to deform elastically when the roller (1) guides the sheet (101) by friction. The deformation portion (10) comprises at least one cut (12) extending from the contact surface (2) to the central portion (6), the cut (12) being arranged such that the deformation portion (10) comprises at least one elastically deformable segment (16).

A paper separating roller, including a shaft body, a first friction member and a second friction member is provided. The first friction member covers a first surface of an outer periphery of the shaft body. The second friction member covers a second surface of the outer periphery of the shaft body, wherein the first friction member and the second friction member are formed of two different materials. With the design of the friction members being formed of composite materials, the paper separating roller has the advantages of two different material features at the same time, such that a wider range of performance capabilities can be achieved.

A sheet conveyance device includes a conveyance roller pair. A skew correction roller pair conveys the sheet after contacting two nip portions, and a sheet skew is corrected in a state in which the skew correction roller pair is being stopped. The sheet having a toner image is bent by a first conveyance guide such that a sheet first surface becomes an inside surface. The sheet is bent by the first and second conveyance guides to cause the sheet first surface to be the inside surface and a sheet second surface to be an outside surface. The skew correction roller pair includes two first rotary members of a first roller. A second roller and the two first rotary members form the two nip portions. The second roller and the first conveyance guide contact the sheet first surface. The first roller and the second conveyance guide contact the sheet second surface.

A folding roller module with combined bearing unit is disclosed. The folding roller module of the present invention comprises a folding roller and a plurality of combined bearing unit. In the present invention, a plurality of combined bearing unit are used to support the folding roller at suitable locations for enhancing the strength of the folding roller module, reducing the deformation of the folding roller, and reducing the vibration during operation.

A brake is provided for an idler roll (10) of a fiber web machine, in particular of a slitter-winder, which idler roll (10) has an outer shell surface (13). The brake (20) is located outside the outer shell surface (13) of the idler roll (10) in close vicinity of the idler roll (10) in a non-contacting position. The brake (20) has a permanent magnet (25), which is configured to be moved from non-braking position to a braking position and vice versa by an actuator or cylinder (35, 45).