A material aligning device having a plurality of sine waves, wherein the sine waves can be in the form of protrusions repeating along an outer surface of a roller. The material aligning device provides an oscillation to the material sheet moving on it to cancel its vibrations, which allows for faster and improved alignment while printing, web converting, and during other similar processes. The material aligning device also relieves the high amount of tension typically necessary for the printing, converting, and other similar material processing using machines. The reduction in tension also reduces the likelihood of the material sheet being overly stretched or for it to rip.

A separation unit for separating a web material along preformed lines of weakness. The separation unit has a width direction and includes at least a first roller having a rotational axis extending in the width direction and a web width extending in the width direction, and at least a second roller having a rotational axis extending parallel with the rotational axis of the first roller and a web width extending in the width direction. The second roller is positioned at a distance from the first roller. Each of the first and the second rollers is provided with at least one protrusion element extending perpendicularly from the axes. Each of the protrusion elements has a maximum width in the width direction, a maximum radial extension from the rotational axes, an inner portion adjacent to the rotational axes, and an outer portion remote from the rotational axes.

A draw-in apparatus having at least two rotatable draw-in rollers for drawing in sheet goods, in particular bank notes, wherein the draw-in rollers are arranged relative to each other with meshing roller profiles respectively extending transversely to the draw-in direction so as to define a draw-in gap for the sheet goods, and wherein the draw-in rollers have axial cross-sectional profiles mutually matched such that a clearance between the draw-in rollers changes periodically upon a rotation of the draw-in rollers.

Provided is an uneven roller of which a surface coming into contact with a medium is provided with a plurality of protrusions and recesses, the uneven roller including a shaft portion, a reference portion mounted on the shaft portion, a ring portion that is positioned closer to a side, to which a first direction along an axial direction of the shaft portion extends, than the reference portion is and that is mounted on the shaft portion, and a restriction portion that is positioned closer to the side, to which the first direction extends, than the ring portion is and that is mounted on the shaft portion to restrict movement of the ring portion in the first direction. The ring portion is composed of a plurality of uneven rings disposed along the axial direction, the uneven ring including a plurality of protrusion portions disposed along a circumferential direction.

A medium transportation device for transporting a medium. The medium transportation device including a first transportation roller pair that nips and transports the medium with a first uneven roller of which a surface coming into contact with the medium is provided with protrusions and recesses and a first facing roller that faces the first uneven roller. A second transportation roller pair is positioned downstream of the first transportation roller pair in a medium transportation direction and nips and transports the medium with a second uneven roller of which a surface coming into contact with the medium is provided with protrusions and recesses and a second facing roller that faces the second uneven roller. The first uneven roller comes into contact with a first surface and the second uneven roller comes into contact with a second surface.

Provided is a medium transportation device including an uneven roller of which a surface coming into contact with a medium is provided with a plurality of protrusions and recesses, a facing roller nipping the medium together with the uneven roller, and a claw portion guiding the medium to be separated from the uneven roller. A non-uneven region in which the protrusions and recesses are not formed along a circumferential direction is formed at a portion of the uneven roller in an axial direction and the claw portion faces and the non-uneven region.

Provided is a medium transportation device transporting a medium onto which liquid is discharged, the medium transportation device including a transportation roller pair that nips and transports the medium. The transportation roller pair includes a first uneven roller of which a surface coming into contact with the medium is provided with protrusions and recesses and a second uneven roller that is a roller disposed to face the first uneven roller and of which a surface coming into contact with the medium is provided with protrusions and recesses and a protrusion portion of one of the first uneven roller and the second uneven roller faces a recess portion of another of the first uneven roller and the second uneven roller.