Sheet decelerating apparatus, method for decelerating a sheet stacking apparatus and sheet

摘要

Decelerating apparatus leaves to reduce the speed of a sheet material (15) moving along a path of travel (22) at a first speed, the apparatus comprising: a first rotatable roller (26) rotatable about a first axis, the first substantially perpendicular to the path of travel axis (22) and being the first roller (26) located on one side of the path of travel (22); a second rotatable roller (28) rotatable about a second axis, the second direction substantially perpendicular to the path of travel axis (22) and the second roller (28) located on the other side of the path of travel being (22 ) and spaced from the first roller (26) so that the sheet material (15) can pass between the first and second rollers (26, 28); being displaceable at least one of the first and second rollers (26, 28) relative to and toward the other of the first and second rollers (26, 28) for catching the sheet (15) between the first and second rollers (26, 28 ) for at least part of the travel of the blade (15) beyond the first and second rollers (26, 28) to reduce the speed of the blade (15); an air vacuum (60) along the travel path (22) after the first and second rollers (26, 28) conveyor; It characterized by further comprising a third rotating roller (72) along the travel path (22) after the first and second rollers (26, 28) to push the sheet of material (15) away from the overhead conveyor in vacuo (60); wherein the third roller (72) is movable between a retracted position in which the third roller (72) is sufficiently spaced from the sheet material (15) not to push the blade (15) away from the overhead conveyor in vacuo (60) and a deployed position where the third roller (72) to be moved, and in contact with the sheet material (15) so as to urge the blade (15) away from the overhead conveyor to the vacuum (60); and wherein the third roller (72) extends to push the sheet of material (15) away from the overhead conveyor to the vacuum (60) substantially the same time that the first and second rollers (26, 28) are actuated to catch the sheet material (15) to reduce the speed of the blade (15).