A sheet conveyance apparatus includes a rotary member pair, a movement portion, a detection portion, an abutment member, an oblique conveyance portion, and a controller configured to, on a basis of a detection result of the detection portion, move the rotary member pair in a width direction by the movement portion such that a position, in the width direction, of the downstream end of the sheet is a set position in a state in which the rotary member pair is nipping the sheet and before the sheet reaches the oblique conveyance portion. The controller is configured to execute a correction mode of correcting the set position.

A sheet conveyance apparatus includes a rotary member pair, a movement portion, a detection portion, an abutment member, an oblique conveyance portion, and a controller configured to, on a basis of a detection result of the detection portion, move the rotary member pair in a width direction by the movement portion such that a position, in the width direction, of the downstream end of the sheet is a set position in a state in which the rotary member pair is nipping the sheet and before the sheet reaches the oblique conveyance portion. The controller is configured to execute a correction mode of correcting the set position.

A system for moving a flexible plate, in particular a printing plate or a printing plate precursor, over a support surface in the direction of a treatment station, comprising a support for supporting the plate on a support surface thereof; an articulated operating arm extending substantially parallel to the support surface and comprising a first segment and a second segment; said first segment having a first end which is rotatably connected to said second segment around a first rotation axis substantially perpendicular to the support surface, and a second end provided with a plate engagement means to contact the plate; said second segment being rotatable around a second rotation axis substantially perpendicular to the support surface; a control means to control the rotation of the first and second segment, such that the plate is slid over the support in the direction of the treatment station.

A system for moving a flexible plate, in particular a printing plate or a printing plate precursor, over a support surface in the direction of a treatment station, comprising a support for supporting the plate on a support surface thereof; an articulated operating arm extending substantially parallel to the support surface and comprising a first segment and a second segment; said first segment having a first end which is rotatably connected to said second segment around a first rotation axis substantially perpendicular to the support surface, and a second end provided with a plate engagement means to contact the plate; said second segment being rotatable around a second rotation axis substantially perpendicular to the support surface; a control means to control the rotation of the first and second segment, such that the plate is slid over the support in the direction of the treatment station.

A sheet conveyance apparatus includes a rotary member pair, a moving unit configured to move the rotary member pair in a width direction orthogonal to a sheet conveyance direction, an abutment member, an obliquely conveying portion, a detection portion, and a control unit. The control unit is configured to execute (1) a first mode of controlling the moving unit such that the rotary member pair is moved in the width direction based on a detection result of the detection portion before the sheet arrives at the obliquely conveying portion, and (2) a second mode of controlling the moving unit such that the rotary member pair is moved in a second direction regardless of a detection result of the detection portion in a state where the sheet is nipped by the rotary member pair and before the sheet arrives at the obliquely conveying portion.

A sheet conveyance apparatus includes a rotary member pair, a moving unit configured to move the rotary member pair in a width direction orthogonal to a sheet conveyance direction, an abutment member, an obliquely conveying portion, a detection portion, and a control unit. The control unit is configured to execute (1) a first mode of controlling the moving unit such that the rotary member pair is moved in the width direction based on a detection result of the detection portion before the sheet arrives at the obliquely conveying portion, and (2) a second mode of controlling the moving unit such that the rotary member pair is moved in a second direction regardless of a detection result of the detection portion in a state where the sheet is nipped by the rotary member pair and before the sheet arrives at the obliquely conveying portion.

A sensor unit includes an edge detection sensor and an illumination device. The edge detection sensor is disposed in a conveying path of a recording medium and detects a recording medium edge position in a width direction perpendicular to a conveying direction. The illumination device is disposed to face the edge detection sensor in the conveying path and emits light toward the edge detection sensor. The illumination device includes a light source and a diffuser. The light source emits light. The diffuser diffuses the light from the light source and suppresses luminance unevenness.

A method of measuring properties of a moving cellulose, paper or board sheet. A first parameter of a first resonance caused by the moving sheet in a frequency range 1 GHz to 25 GHz of electromagnetic radiation is measured. A second parameter of an electromagnetic signal transmitted between at least a pair of transceiver parts of a transceiver sensor located on opposite sides of the moving sheet through the moving sheet is measured in a frequency range 25 GHz to 1000 GHz. A minimum difference between the frequency ranges related to the first parameter and the second parameter being at least 5 GHz. Both the dry stuff content and the weight of water per unit of area are determined on the basis of the first parameter, the second parameter and available information related to a distance travelled by the electromagnetic signal.

A method of measuring properties of a moving cellulose, paper or board sheet. A first parameter of a first resonance caused by the moving sheet in a frequency range 1 GHz to 25 GHz of electromagnetic radiation is measured. A second parameter of an electromagnetic signal transmitted between at least a pair of transceiver parts of a transceiver sensor located on opposite sides of the moving sheet through the moving sheet is measured in a frequency range 25 GHz to 1000 GHz. A minimum difference between the frequency ranges related to the first parameter and the second parameter being at least 5 GHz. Both the dry stuff content and the weight of water per unit of area are determined on the basis of the first parameter, the second parameter and available information related to a distance travelled by the electromagnetic signal.

A sheet transfer device for transferring a sheet between two sheet processing devices comprising a switch for directing sheets from a first transport path coming from the first sheet processing device onto a two-way transport path or for directing sheets from the two-way transport path onto a second transport path for feeding sheets to the second sheet processing device. A transport pinch is provided along the two way transport path for reversing a sheet on the two-way transport path. When in use, the two-way transport path extends downward in a vertically extending free-hanging chamber wherein the sheet engaged by the transport pinch is allowed to hang freely under the influence of gravity. Thereby, a compact device is formed which is able to adjust the sheet to a suitable orientation for the second processing device. The device further prevents forces from the first processing device to disrupt the sheet's orientation in the second processing device.