A belt driving device includes a plurality of rollers, an endless belt, a contact surface, and a non-contact surface. The rollers include a driving roller that is rotationally driven. The endless belt is stretched between the rollers such that a predetermined tension is applied to the endless belt, and the endless belt protrudes from opposite end portions of the rollers in an axis direction of each of the rollers. The contact surface is formed at a first end portion of at least one of the rollers and comes in contact with the endless belt. The first end portion is located on a meandering direction side of the endless belt. The non-contact surface is formed at each of second end portions of the rollers and doesn't come in contact with the endless belt. The second end portions are located on a side opposite to the meandering direction of the endless belt.

The module (3) comprises a frame having vertical pillars (30A, 30B), a rotary turnover structure (4) arranged horizontally between the vertical pillars and comprising rotation shafts (400A) supported by bearings (300A) with which the vertical pillars are respectively equipped. A motor (303B) applies a first mechanical torque to one of the rotation shafts when a folding package turnover is ordered in the machine. The module also comprises additional means (5) for applying a second mechanical torque to the other rotation shaft upon a folding package turnover.

A medium transporting apparatus includes an endless conveyor belt having an outer surface to which a sheet P adheres, at least two rollers, which are a first roller and a second roller, around which the conveyor belt extends. The second roller is located downstream of the first roller in a medium transporting direction. The medium transporting apparatus also includes a backing plate that supports an inner surface of the conveyor belt at a position between the first roller and the second roller. In the medium transporting apparatus, the backing plate includes a hollow-containing portion that is formed at an upstream end of the backing plate in the medium transporting direction. The hollow-containing portion has a plurality of hollows formed therein in a width direction that intersects the medium transporting direction. The plurality of hollows are formed in a support surface that supports the conveyor belt.

A sheet supplier, including: a tray including a sheet support surface; a sheet supply roller configured to supply an uppermost one of sheets; a rotational member configured to contact a lowermost one of the sheets; a presser configured to press the supply roller relative to the rotational member; and a supporter configured to support the rotational member by a contact portion such that the rotational member is rotated by a movement of the lowermost sheet and to limit a movement of the rotational member caused by a force of the lowermost sheet in a sheet supply direction; wherein, where static friction coefficients between the supply roller and the uppermost sheet, between the sheets on the support surface, between the rotational member and the lowermost sheet, and between the rotational member and the contact portion are respectively defined as 2, 3, and 4, the following expressions are satisfied: 1>4>2, 3>4.

A sheet conveyance apparatus includes a rotary drive member configured to rotate by receiving transmission of driving force from a driving source, a driven rotary member arranged with a predetermined distance in a sheet conveyance direction from the rotary drive member, an endless belt member supported on the rotary drive member and the driven rotary member, and configured to be rotated by a rotation of the rotary drive member, and a guide member configured to guide a sheet conveyed by the belt member. The guide member is mounted to a shaft configured to support the rotary drive member, and the rotary drive member is supported on the shaft in a rotatable manner with respect to the shaft.

A belt driving apparatus includes a driving pulley, a driven pulley and an endless toothed belt. Each of the driving pulley and the driven pulley includes an outer circumference surface provided with a plurality of teeth. The toothed belt, wound around the driving pulley and the first driven pulley, includes an inner surface provided with a plurality of teeth arranged to mesh with the teeth of the driving pulley and the first driven pulley. The belt driving apparatus also includes an idler pulley having a belt contact surface coming into contact with the outer surface of the toothed belt. As viewed along the width direction of the belt contact surface, the idler pulley includes a center portion and two end portions sandwiching the center portion. The center portion of the idler pulley is greater in diameter than each of the two end portions.

A conveying unit (100) of a web, or sheet, of paper, or similar products, arranged to transfer along a transfer direction the web, or sheet, of paper, having a support (41) having a lateral surface (42) provided with at least one peripheral suction groove (43). A suction belt (45) is arranged to move along a closed trajectory (46) comprising the suction portion (44). The suction belt (45) is configured to air-tightly engage the suction portion and provides at least one through hole (47) arranged to be positioned at a respective suction portion (43) in order to cause a suction effect on the web, or sheet, and to transfer it from a first point P1 to a second point P2 of a production line of paper products. It is, furthermore, provided a driving device (60) configured to move the suction belt (45) with respect to the support (41).

A belt driving apparatus includes a driving pulley, a driven pulley and an endless toothed belt. Each of the driving pulley and the driven pulley includes an outer circumference surface provided with a plurality of teeth. The toothed belt, wound around the driving pulley and the first driven pulley, includes an inner surface provided with a plurality of teeth arranged to mesh with the teeth of the driving pulley and the first driven pulley. The belt driving apparatus also includes an idler pulley having a belt contact surface coming into contact with the outer surface of the toothed belt. As viewed along the width direction of the belt contact surface, the idler pulley includes a center portion and two end portions sandwiching the center portion. The center portion of the idler pulley is greater in diameter than each of the two end portions.

A sheet supplier, including: a tray including a sheet support surface; a sheet supply roller configured to supply an uppermost one of sheets; a rotational member configured to contact a lowermost one of the sheets; a presser configured to press the supply roller relative to the rotational member; and a supporter configured to support the rotational member by a contact portion such that the rotational member is rotated by a movement of the lowermost sheet and to limit a movement of the rotational member caused by a force of the lowermost sheet in a sheet supply direction; wherein, where static friction coefficients between the supply roller and the uppermost sheet, between the sheets on the support surface, between the rotational member and the lowermost sheet, and between the rotational member and the contact portion are respectively defined as 2, 3, and 4, the following expressions are satisfied: 1>4>2, 3>4.

A method of printing having the steps of transporting a print medium along a print station for printing on the print medium by means of an endless, air permeable transport belt positioned over a suction device for applying an underpressure to the print medium on the transport belt, wherein the transport belt comprises endless, non-permeable strips positioned between air permeable areas provided with openings and the suction device comprises a plurality of spaced apart support beams extending substantially in a main transport direction defined by the print station for supporting the transport belt; and controlling the position and/or orientation of the transport belt for aligning the print medium with respect to the print station, wherein each adjustment to the transport belt's position and/or orientation is restricted, such that the strips are maintained entirely overlapping the support beams.