A sheet thickness detector incorporated in a sheet conveyor and/or an image forming apparatus includes multiple first rollers aligned in a direction perpendicular to a sheet conveying direction, multiple second rollers facing the respective first rollers, a first roller shaft supporting two first rollers, at least one second roller shaft supporting rollers other than the two first rollers, at least one third roller shaft to support at least three second rollers, a first roller shaft holder supporting the first roller shaft to move from the at least one third roller shaft in a contact/separation direction, a biasing member biasing the first roller shaft toward at least one third roller shaft, and a displacement amount detector detecting an amount of displacement of the first roller shaft. A thickness of a sheet between the first and second rollers is detected based on a detection result by the displacement amount detector.

A correction driving roller of a printing apparatus, which is used for transporting a paper sheet, includes at least one toothed roller that includes a plurality of wheels configured to be brought into contact with the paper sheet when the paper sheet is transported, and holders that hold the wheels, and is constructed such that the plurality of wheels are fixed to the holders while being arrayed in an axial direction orthogonal to the side surfaces of the wheels. Cut portions are formed on the wheel and are spaced away from each other when the toothed roller is viewed in the axial direction.

In many continuously webbed machines, media is fed through the machine with rollers mounted to one or more rotating shafts. These shafts may be supported on each end with a cylindrical journal bearing. The rollers move at the same rate as the media to maintain traction with the media to control media position as it moves the media from one process to another through the sequence of processes in the webbed machine.

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 conveying system and a battery production system are provided. The conveying system is used for sheet conveying, and includes: a driving roller making contact with a sheet; and a press roller arranged correspondingly to the driving roller, the press roller abutting against at least part of the surface of the sheet facing away from the driving roller and pressing the sheet against the driving roller. The press roller includes: a main shaft with a central axis; at least one hollow rubber roller detachably sleeving the main shaft; and at least one pair of fixing clamp rings arranged on two sides of the hollow rubber roller along the central axis so as to fix the position of the hollow rubber roller on the main shaft along the central axis, where an outer diameter of the fixing clamp ring is less than that of the hollow rubber roller.

A sheet transport device includes a sheet transport unit, a detector, and a releasing unit. The sheet transport unit transports a sheet by nipping the sheet in a nip between multiple pairs of transport rollers arranged in a sheet width direction intersecting a sheet transport direction. The detector detects a size of the transported sheet. The releasing unit releases the nip of one or more of the pairs of transport rollers outside a transport region of the sheet based on the size of the sheet detected by the detector.

A conveyance device includes a plurality of pairs of rotators and a conveyance path. The pairs of rotators include first rotators disposed adjacent to a reverse side of a liquid-adhered surface of a sheet and second rotators disposed adjacent to the liquid-adhered surface. The second rotators have protrusions. Each pair of rotators includes one first rotator and two or more second rotators. The conveyance path includes at least one curved conveyance portion. The pairs of rotators are disposed at intervals on the conveyance path in a conveyance direction. The one first rotator and the two or more second rotators in at least one of the pairs are disposed in contact with each other. The number of the two or more second rotators arranged in a sheet width direction is larger in an upstream portion than in a downstream portion of the conveyance path in the conveyance direction.

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 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).

An assembly for folding polymeric film for machines for forming pouches and the like includes a fixed frame for supporting a magazine for the polymeric film, an element for folding the film that arrives from the magazine, and at least one heat-sealing device for the stable coupling of juxtaposed portions of the folded film that arrives from the folding element. The folding element is mounted on a carriage, which can translate along a respective guide which is integral with the frame, along the sliding direction of the film, with a speed that is variable in intensity and sign. The at least one heat-sealing device acts on portions folded onto themselves of the film during a temporary stop thereof. The carriage retracts with respect to the sliding direction of the film for the entire duration of the temporary stop step provided for the heat-sealing of the film.