摘要:
An improved media rotator/translator apparatus includes a cylinder on sphere nip. A series of beveled/spur gears are included, one of which rotates co-axially but independent to the drive roll shafts. This enables the drive rolls to be driven about their own axis while simultaneously allowing for rotation about the roll shaft axis. A ball idler is positioned above each drive roll providing media normal force. Thus, sheet translation, jogging, and rotation is obtained, but with no relative motion, thereby eliminating marking of certain media.
摘要:
A print media deskew apparatus includes a print media support having a first surface defining a plane for a print media transport path and a second surface parallel to the print media transport path and two apertures in the first surface aligned in the print media transport path. A first set of selectively driven spheres in the print media transport path and a second set of selectively driven spheres in the print media transport path downstream from the first impart a paper path force and a lateral driving force on a media sheet such that the sheet is driven laterally to the print media transport path until edge contact with the second surface removes any skew from the sheet.
摘要:
Presented herein is a sheet turning unit (1) comprising a first sheet conveyor device (2a) for transporting a sheet at least along a first transport path (B1) in a first plane (E1), and comprising a second sheet conveyor device (2b) for transporting the sheet along a second transport path (B2), said second transport path extending at an angle of 90° with respect to the first transport path (B1) and, in sum, describing a curve of 180°, whereby the starting point of said curve is located in the first plane (E1) and the end point of said curve is located in a second plane (E2) that is different from the first plane, and comprising a third sheet conveyor device (2c) for transporting the sheet along at least a third transport path (B3). As a result of this, the leading edge of the sheet remains in front even after the turning operation, and a precisely functioning and reliable sheet turning unit is being provided. Furthermore, advantageous embodiments of the first and third sheet conveyor devices are described, said devices enabling the transport of a sheet in two directions. The advantageous embodiments of the first and third sheet conveyor devices are compact and simple in design and can be controlled easily. The advantageous embodiments of the first and third sheet conveyor devices comprise a sheet transport body that, by means of a rotating mechanism arranged in the sheet transport body, can be rotated about a first rotational axis and a second rotational axis, said axes extending through one point of intersection and being perpendicular to one another.
摘要:
An apparatus and method for registering and deskewing a sheet along a sheet path. A pair of drive spheres are located in the sheet path. When a sheet enters the nips formed by the spheres the sheet is driven until it is sensed by a sensor. The drive spheres are driven by a pair of wheels which allow the spheres to rotate about any axis through their center and parallel to the plane of the sheet. The spheres are driven such that the sheet is side registered and deskewed as it is moved along the sheet path. Constant feedback from the sensors to the drive controller allows the sheet to be registered in a very short distance and has the added benefit of self compensation for wear of the drive components. The wide registration and deskewing latitude of the device allows for the use of relatively inexpensive and low accuracy sheet drives preceding the device.
摘要:
Presented herein is a sheet turning unit (1) comprising a first sheet conveyor device (2a) for transporting a sheet at least along a first transport path (B1) in a first plane (E1), and comprising a second sheet conveyor device (2b) for transporting the sheet along a second transport path (B2), said second transport path extending at an angle of 90° with respect to the first transport path (B1) and, in sum, describing a curve of 180°, whereby the starting point of said curve is located in the first plane (E1) and the end point of said curve is located in a second plane (E2) that is different from the first plane, and comprising a third sheet conveyor device (2c) for transporting the sheet along at least a third transport path (B3). As a result of this, the leading edge of the sheet remains in front even after the turning operation, and a precisely functioning and reliable sheet turning unit is being provided. Furthermore, advantageous embodiments of the first and third sheet conveyor devices are described, said devices enabling the transport of a sheet in two directions. The advantageous embodiments of the first and third sheet conveyor devices are compact and simple in design and can be controlled easily. The advantageous embodiments of the first and third sheet conveyor devices comprise a sheet transport body that, by means of a rotating mechanism arranged in the sheet transport body, can be rotated about a first rotational axis and a second rotational axis, said axes extending through one point of intersection and being perpendicular to one another.
摘要:
An improved media rotator/translator apparatus includes a cylinder on sphere nip. A series of beveled/spur gears are included, one of which rotates co-axially but independent to the drive roll shafts. This enables the drive rolls to be driven about their own axis while simultaneously allowing for rotation about the roll shaft axis. A ball idler is positioned above each drive roll providing media normal force. Thus, sheet translation, jogging, and rotation is obtained, but with no relative motion, thereby eliminating marking of certain media.
摘要:
According to one aspect of the embodiment, a sheet transport device includes a detecting unit configured to detect skew with respect to a transport direction of a sheet that is supplied, a transport unit configured to transport the sheet using a plurality of transport members disposed on the right and on the left at different intervals from an upstream side toward a downstream side in the transport direction and a control unit configured to cause rotation velocities of transport members on the right among the plurality of transport members to be different from rotation velocities of transport members on the left among the plurality of transport members in accordance with the skew of the sheet detected by the detecting unit.