An image forming apparatus includes a main body, an image forming unit, a sheet tray disposed below the image forming unit, and a retransport assembly configured to transport a sheet along a retransport path including first, second, and third retransport path portions in a transport direction. The retransport assembly includes a portion of the sheet tray defining the first retransport path portion, a connecting unit and a retransport unit, which are disposed below the sheet tray. The connecting unit defines the second retransport path portion connected to an upstream end of the third retransport path portion in the transport direction. The retransport unit is movable between a stored position and a pulled-out position. The retransport unit at the stored position defines the first retransport path portion connected to an upstream end of the second retransport path portion in the transport direction.

To correct a posture of a paper sheet inserted from various positions and angles to a normal transport state without causing any deformation due to contact with a side wall while transporting the paper sheet continuously and non-intermittently. A drive-side unit (20) includes at least one drive roller (25) that is supported rotatably about a shaft orthogonal to a normal paper-sheet transport direction and axially movably, an elastic biasing member (40) that elastically biases the drive roller in an axial direction, and a cam mechanism (50) that transmits a driving force from a driving source to the drive roller, and operates when an external force exceeding a predetermined value in a direction other than a normal transport direction is applied to the paper sheet transported by the drive roller, so as to change an axial position of the drive roller against an elastic biasing force, and a driven-side unit (100) includes a driven roller that changes a transport grip between the drive roller and a paper sheet according to a change of an axial position of the drive roller.

A sheet conveyance apparatus includes a first conveyance portion configured to convey a sheet, a second conveyance portion configured to convey the sheet, the second conveyance portion including an abutment portion configured to form a loop on the sheet by being abutted against a leading edge of a sheet conveyed by the first conveyance portion, a curved guide portion, which is curved, configured to guide the sheet conveyed by the first conveyance portion to the second conveyance portion, and a rotary member arranged downstream of the first conveyance portion and upstream of the second conveyance portion in a sheet conveyance direction, and configured to be driven to rotate by a surface of the sheet that is guided by the curved guide portion, the surface sliding against the curved guide portion.

The present disclosure provides a double-sided printing paper conveying unit, including a paper conveyor configured to convey paper in a conveying direction, a guiding part configured to guide the paper conveyed by the paper conveyor, an aligner movably mounted on the guiding part, and configured to correct a skew posture of the paper during conveyance in an alignment direction perpendicular to the conveying direction; and a movement mechanism mounted on the guiding part and capable of moving the aligner along the alignment direction and between a first position corresponding to a first size of paper and a second position corresponding to a second size of paper such that the aligner aligns the paper based on a size of the paper. In addition, the present disclosure also provides an imaging apparatus that includes the double-sided printing paper conveying unit.

Method of manipulating a sheet of fiber reinforced material built up with parallel longitudinally oriented fibers embedded in a thermoplastic matrix material, wherein at least one face of the sheet is engaged by a friction element that extends substantially transversely to the orientation of the fibers, and that exerts friction onto the face in a direction substantially along the orientation of the fibers. And a device for moving sheets of fiber reinforced material having parallel longitudinally oriented fibers embedded in a thermoplastic matrix material, in particular sheets presenting anisotropic stiffness is disclosed. The device comprises a conveying path for conveying sheets of fiber reinforced material in a direction substantially along the orientation of the fibers, and a drive element arranged substantially transversely to the conveying path to in use engage a face of a sheet of fiber reinforced material to be conveyed along the path, and arranged to exert friction onto the face in a direction substantially along the orientation of the fibers. The device may further include a guide element arranged substantially transversely to the conveying path to in use engage the opposite face of the sheet of fiber reinforced material to be conveyed along the path, the drive element and the guide element being arranged to envelope the conveying path.

A sheet conveyance apparatus includes an oblique-feed unit configured to nip and convey a sheet by imparting to the nipped sheet a force in a direction inclined relative to a sheet conveyance direction so that the sheet approaches an abutment surface in the width direction as the sheet proceeds downstream in the sheet conveyance direction; a drive unit configured to drive the oblique-feed unit; a change unit configured to change the force of the oblique-feed unit; and a control unit configured to control the drive unit and the change unit so that, after causing the sheet to abut against the abutment surface in a first state in which the oblique-feed unit is driven at a first speed, the oblique-feed unit is put into a second state in which the oblique-feed unit is driven at a second speed higher than the first speed and the force is weaker than in the first state.

A gravity-assisted registration system suited to use in a printing device includes a transport member with a surface on which an associated sheet is translated in a process direction. The surface defines an angle with respect to horizontal in a cross-process direction. A registration wall, adjacent a lower end of the surface, defines a registration edge for registering the sheet. A drive mechanism drives at least one rotation mechanism, for translating sheet in the process direction, each rotation mechanism including at least one drive member with an axis of rotation parallel to the surface in the cross-process direction, Each drive member includes a sliding mechanism, at a periphery of the drive member, enabling the sheet to slide, under gravity, on the surface, toward the registration wall into an alignment position, in contact with the registration wall.

An object of the present invention is to correct the deviation of a sheet in the width direction occurring on a conveyance path from a sheet correction mechanism (4) to a discharge tray. A sheet shift portion (41, 43, 44) moves a sheet in the width direction. A conveying position detecting portion (45, 46, 47) detects the position of the sheet in the width direction. A discharge position detecting portion (54, 8a) detects a discharge position of the sheet, in the width direction, discharged onto a discharge tray (33) in a sheet discharge portion (31). A control portion (8b) derives an amount of deviation between the discharge position and a discharge reference position based on a detection result of the discharge position detecting portion (54, 8a). Furthermore, the control portion (8b) corrects a conveying position of the sheet in a sheet conveying portion according to the amount of deviation.

An image forming apparatus includes: a transfer section that transfers an image to a sheet; a sheet conveyance member that is provided on an upstream of the transfer section in a sheet conveyance direction and that conveys the sheet; and a hardware processor that controls the sheet conveyance member to displace the sheet, wherein a preset value defining a displacement condition of the sheet conveyance member for providing a correct position of the image on the sheet is set.

A medium processing device includes a conveyance guide that forms a conveyance path, a reference surface guide that is provided at one side of the conveyance path, a trigger sensor that detects a rear end of the medium in the conveyance direction, a first alignment roller and a second alignment roller for aligning the medium with the reference surface guide. The first alignment roller is provided at the middle, in a width of the conveyance path. The second alignment roller is provided between the reference surface guide and the first alignment roller in the width direction. The second alignment roller is provided at a downstream side of the first alignment roller in the conveyance direction. A space from the first alignment roller to the second alignment roller in the conveyance direction is longer than a space from the trigger sensor to the first alignment roller in the conveyance direction.