The invention relates to a method for cross-cutting a material web (1), in particular a pulp web or the like, that is moved in a direction of movement (2), wherein the material web (1) is moved through between two axes of rotation oriented approximately perpendicularly to the direction of movement (2), about which axes of rotation cooperating blades (3, 4) are moved with a rotary movement, said blades (3, 4) cutting the material web (1) approximately perpendicularly to the direction of movement (2) as said material web (1) passes through between the axes of rotation. In order to achieve a high-quality cut edge with little noise pollution and high system availability, the invention provides that, after the material web (1) has been cut, a force is applied to a part of the material web (1) that is carried along with a blade (3, 4) and in particular a part of the material web (1) that bears against a blade (3, 4), in order to separate the material web (1) from the rotary movement of the blade (3, 4). Furthermore, the invention relates to a device for cross-cutting a material web (1) that is moved in a direction of movement (2), having at least two cooperating blades (3, 4), which are rotatable about axes of rotation arranged approximately perpendicularly to the direction of movement (2), wherein the material web (1) is movable through between the axes of rotation, such that the material web (1) is able to be cut by the blades (3, 4) approximately transversely to the direction of movement (2).

A shearing device for fragmenting a metal strip includes two counter-rotating drums facing one another, a drive device connecting the drums and synchronising their rotation speed, and at least one pair of drum-supported blades. The blades engage by shearing effect during drum rotation to cut the waste. The blades of the pair have, from the cutting edge thereof, planar surfaces, referred to as overlapping surfaces, overlapping and facing one another during the shearing between blades, each blade being secured transversely to the drum, at an angle to the axis of rotation of the drum, so the plane through the overlapping surface of the blade forms an angle with the axis of rotation of the corresponding drum, producing gradual shearing. The overlapping surface of each blade is tilted so the plane passing through the overlapping surface does not intersect the rotational axis of the drum on its active width.

A shearing device for fragmenting a metal strip includes two counter-rotating drums facing one another, a drive device connecting the drums and synchronising their rotation speed, and at least one pair of drum-supported blades. The blades engage by shearing effect during drum rotation to cut the waste. The blades of the pair have, from the cutting edge thereof, planar surfaces, referred to as overlapping surfaces, overlapping and facing one another during the shearing between blades, each blade being secured transversely to the drum, at an angle to the axis of rotation of the drum, so the plane through the overlapping surface of the blade forms an angle with the axis of rotation of the corresponding drum, producing gradual shearing. The overlapping surface of each blade is tilted so the plane passing through the overlapping surface does not intersect the rotational axis of the drum on its active width.

A device for changing a blade on shears, in particular for a rolled band, and to such shears in which a blade can be fixed to at least one blade support automatically by a tie bar pretensioned by a force accumulator. The device includes at least one adjusting element which can be actuated in order to release the blade from the blade support such that the tie rod is moved in an axial direction against the tie rod pretension. The adjusting element can be arranged on an outer face of the blade support or outside of the blade support.

A device for changing a blade on shears, in particular for a rolled band, and to such shears in which a blade can be fixed to at least one blade support automatically by a tie bar pretensioned by a force accumulator. The device includes at least one adjusting element which can be actuated in order to release the blade from the blade support such that the tie rod is moved in an axial direction against the tie rod pretension. The adjusting element can be arranged on an outer face of the blade support or outside of the blade support.

The single shear described herein for cutting and simultaneously conveying one or more pairs of rolling wires or bars (1, 2), comprises the following parts: a mobile diverter (5) consisting of at least two channels (6, 7) in each of which a wire or bar (1, 2) slides; at least two pairs of counter-knives (3, 4) each of which acts on a wire or bar (1, 2); a conveying device (9) for conveying the cut segments of wires or bars (1, 2), comprisingat least one pair of mobile elements (20, 20) configured to be independent of each other and synchronized with each other and with the mobile diverter (5), for the separate management of each of said cut sections of wires or bars (1, 2), andat least two pairs of output channels (A1, A2, B1, B2) for conveying the cut segments of wires or bars (1, 2).

The single shear described herein for cutting and simultaneously conveying one or more pairs of rolling wires or bars (1, 2), comprises the following parts: a mobile diverter (5) consisting of at least two channels (6, 7) in each of which a wire or bar (1, 2) slides; at least two pairs of counter-knives (3, 4) each of which acts on a wire or bar (1, 2); a conveying device (9) for conveying the cut segments of wires or bars (1, 2), comprisingat least one pair of mobile elements (20, 20) configured to be independent of each other and synchronized with each other and with the mobile diverter (5), for the separate management of each of said cut sections of wires or bars (1, 2), andat least two pairs of output channels (A1, A2, B1, B2) for conveying the cut segments of wires or bars (1, 2).

The single shear described herein for cutting and simultaneously conveying one or more pairs of rolling wires or bars includes a mobile diverter consisting of at least two channels in each of which a wire or bar slides. The single shear further includes at least two pairs of counter-knives, each of which acts on the wire or bar, and a conveying device for conveying the cut segments of wires or bars. The conveying device may include at least one pair of mobile elements configured to be independent of each other, but configured to be synchronized with each other and with the mobile diverter for the separate management of each of said cut sections of wires or bars. The single shear may finally include at least two pairs of output channels for conveying the cut segments of wires or bars.

The single shear described herein for cutting and simultaneously conveying one or more pairs of rolling wires or bars includes a mobile diverter consisting of at least two channels in each of which a wire or bar slides. The single shear further includes at least two pairs of counter-knives, each of which acts on the wire or bar, and a conveying device for conveying the cut segments of wires or bars. The conveying device may include at least one pair of mobile elements configured to be independent of each other, but configured to be synchronized with each other and with the mobile diverter for the separate management of each of said cut sections of wires or bars. The single shear may finally include at least two pairs of output channels for conveying the cut segments of wires or bars.

An orbital knife including a support structure; a yoke rotatably attached to the support structure having a yoke hub and a plurality of yoke arms; one or more rotatable knife rolls connected to at least one of the plurality of yoke arms; one or more blades attached to each of the one or more knife rolls; one or more sun pulleys rotatably attached to the support structure; an anvil roll rotatably attached to the support structure; and one or more planet pulleys wherein (1) each knife roll has attached thereto at least one planet pulley, (2) each planet pulley is joined via a drive belt with one of the one or more sun pulleys wherein rotation of the sun pulley causes rotation of the planet pulley effectuated by the force imparted by the drive belt.