Device and method for forming a shingle stream of under- or overlapping sheets

A device for forming a shingled stream of underlapping or overlapping paper or cardboard sheets, the device having:

• a transport apparatus for transporting sheets;
• a shingling apparatus for underlapping or overlapping the sheets in regions in order to generate a shingled stream;
• a braking apparatus which is situated downstream of the shingling apparatus in a transport direction of the sheets and which serves for braking shingled sheets;
• a cross-cutting apparatus which is positioned upstream of the shingling apparatus and which serves for cutting a material strip into individual sheets;
• and
• a transfer table provided for the transfer of sheets to a sheet processing machine;
• wherein the transfer table is mounted so as to be non-pivotable and is height-adjustable in at least one linear or arcuate movement obliquely to a transport plane of the shingled stream;
• wherein the braking apparatus has at least one pressure roll;
• wherein the transfer table has a belt section which is movable together with the transfer table independently of the at least one pressure roll;
• and
• wherein a braking gap between the at least one pressure roll and the belt section is formed by height adjustment of the transfer table.

A method for forming a shingled stream of individual underlapping or overlapping paper or cardboard sheets cut from a material strip by means of a cross-cutting apparatus, the method comprising:

• transporting separated sheets to a shingling apparatus and underlapping or overlapping the sheets in regions in order to generate a shingled stream, wherein the shingling apparatus is adjustable in or counter to a transport direction of the sheets;
• braking the shingled sheets by means of a braking apparatus which is situated downstream of the shingling apparatus in the transport direction of the sheets;
• and
• adjusting a position of the shingling apparatus in or counter to the transport direction of the sheets when a cutting length of the sheets changes;
• wherein a distance between the braking apparatus and a transfer point for sheet transfer to a further-processing machine is kept constant when the cutting length of the sheets changes;
• and
• wherein an overlap length of the sheets in the shingled stream when the cutting length of the sheets changes remains invariant for all sheet formats, and a speed of slow-running transport belts for transporting the sheets from the braking apparatus to the transfer point is kept the same for all sheet formats.