The present invention relates to a method for automated, continuous singling of loose sheet material, by the steps of feeding a stack of loose sheet material to be singled located on a first feeding element from a deposit position to a position in which the uppermost sheet of the stack can be grasped by the singling unit, sheet-by-sheet singling of the fed stack by the singling unit, the stack being fed by the feeding element such that the particular uppermost sheet of the stack can be grasped by the singling unit, feeding a further stack of loose sheet material to be fed located on a second feeding element from the deposit position to a position in which the uppermost sheet of the stack to be fed is located below the first feeding element, and uniting the stack to be singled and the fed stack by drawing the first feeding element out of the feeding path.

Continuous separation of loose sheets

A sheet handling device for wide format sheets comprising a sheet support plate having a top surface containing suction holes which are connected to at least one suction chamber, said at least one suction chamber being divided into compartments that are connected, though an opening, to a suction device adapted to create a subatmospheric pressure in the compartments, wherein at least one internal wall between adjacent ones of said compartments defines a flow restriction orifice, and at least one of said compartments is directly connected to the suction device, and at least another one of the compartments is indirectly connected to the suction device through the orifice.

Sheet handling device for wide format sheets

Provided is a sheet inverting apparatus wherein members, such as a roller, are not brought into contact with the printed surface of a sheet at all, and the occurrence of dirt can be prevented by eliminating friction of ink on the surface of the sheet A first transport apparatus and a second transport apparatus each have a plurality of transport belts which move on transport tracks along sheet transport directions and a suction box which sucks the sheet on the transport belts through suction holes formed on the transport belts A turn guide arranged between the first transport apparatus and the second transport apparatus has a plurality of guide ribs disposed between the transport belts Each of the guide ribs coming into slidable contact with the sheet forms a curved inverting transfer surface from an inversion starting point side to an inversion end point side

Sheet transport apparatus

Die Erfindung betrifft Verfahren zum Vermessen der Lage eines Bogens (6) im Anleger (1) einer Druck- oder Druckweiterverarbeitungsmaschine (100), wobei die Vermessung der Lage des Bogens (6) uber die Vermessung der Lage der Bogenvorderkante (24) oder der Lage von auf den Bogen (6) aufgedruckten Marken (23) mittels eines Sensors (20) erfolgt. Weiter betrifft die Erfindung Verfahren zum Ausrichten des Bogens (6).

Verfahren zum Vermessen der Lage von Bogen und zur Ausrichtung von Bogen

Die Erfindung betrifft eine Vorrichtung zum Fordern und gleichzeitigen Ausrichten von Bogen (1, 2, 3), mit einem Richtlineal (50) und mit mindestens einem in Bogenlaufrichtung leicht schrag zum Richtlineal (50) weisend angeordneten Forderband (40) und einer Luftansaugeinrichtung (100), wobei das Forderband (40) auf seiner den Bogen (1, 2, 3) tragenden Oberseite offene Quernuten (23) aufweist, und wobei das obere Trum des Forderbandes (40) in einem oben offenen Fuhrungskanal lauft, und wobei die Quernuten (23) mit der Luftansaugeinrichtung (100) in Stromungsverbindung (20) stehen, wobei Steuerungsmittel (31, 32, 33) vorgesehen sind, zur Steuerung der Luftzufuhr im Bereich der Quernuten (23).

Vorrichtung zum Fördern und gleichzeitigen Ausrichten von Bogen

A device for conveying an imbricated stream of sheets from a sheet pile to a sheet-processing machine includes a conveying table provided with at least one revolvingly drivable, air-permeable conveyor belt The belt has a top strand with an underside slidable over the conveying table, and a plurality of suction chambers arranged behind one another for subjecting the conveyor belt to negative pressure, so that the conveyed sheets are retained on the conveyor belt until they are transferrable to the sheet-processing machine It further includes a common negative-pressure supply provided for negative-pressure activation of all of the suction chambers, and at least one throttle via which the suction chambers, respectively, are pneumatically connected to the common negative-pressure supply

Device for conveying a stream of sheets from a sheet pile to a sheet-processing machine

Die Erfindung betrifft eine Bogentransporttrommel (10) und eine Bogendruckmaschine (100) mit einer solchen Bogentransporttrommel. Die Bogentransporttrommel (10) besitzt mindestens zwei Bogenauflageflachen (21) mit Saugoffnungen (18, 20), wobei eine jeweilige Bogenauflageflache (21) aus einem ersten (11) und einem zweiten (12) Kammsegment mit Segmentzinken (14) gebildet wird, wobei in den Segmentzinken (14) Saugnuten (20) und in der Bogenauflageflache (21) eines jeweiligen zweiten Kammsegments (12) eine Hinterkantensaugnut (18) vorgesehen ist und besitzt weiterhin ein Drehventil (22) zur getakteten Beaufschlagung mit Saugluft. Erfindungsgemas ist eine Mehrzahl von Unterdruckquellen (31, 32, 33, 34, 35) vorgesehen und durch das Drehventil (22) ist eine Hinterkantensaugnut (18) je einer Unterdruckquelle (31, 32, 33) zugeordnet. Dadurch wird sichergestellt, dass der an der Hinterkante eines jeweiligen Bogens (1000) anliegende, von einer jeweiligen Hinterkantensaugnut (18) bereitgestellte Unterdruck sicher aufrecht erhalten wird, auch dann, wenn ein vorausgehender oder nachfolgender Bogen (1000) fehlt.

Bogentransporttrommel und Druckmaschine mit einer solchen Bogentransporttrommel

The sheet feeder for printers has two photoelectric sensors (18, 19). The nearer of these detects incorrect orientation of sheets in the stack, while the further detects a notch (22) on the edge (13) of a sheet (4.1) which acts as a mark for the stack when the sheet is correctly oriented.

Sheet feeder for printers has two photoelectric sensors, nearer sensor detecting incorrect orientation of sheets in stack, while further detects notch on edge of sheet which acts as mark for stack when sheet is correctly oriented

The device for the stream feed of paper sheets has a feed table (10) with a conveyor belt which on the underside of its upper run has a series of suction chambers (19-23), the vacuum control of all of which is by way of a common vacuum supply (26). The suction chambers are each pneumatically connected to the common vacuum supply via at least one restrictor (28). The restrictors are formed by restrictor orifices in a continuous intermediate wall (13) located on spacers (12) below the running surface (11) of the feed table.

Device for stream feed of paper sheets has common vacuum supply for suction chambers located on underside of upper conveyor belt run, with each suction chamber pneumatically connected to common vacuum supply via restrictor

In a method and an apparatus for feeding sheets to a sheet-processing machine, the leading edge of the sheet is smoothed before the grippers are closed by further transport into the sheet-processing machine. A curvature or bend in the sheet transport direction is imparted to the sheet. The feed table has, in its feeder region, a curvature in the sheet transport direction, against which curvature the sheet leading edge is laid with the aid of pneumatic or mechanical devices.

Wolfgang Dolz

Papers

Device for conveying a stream of sheets from a sheet pile to a sheet-processing machine

Bogentransporttrommel und Druckmaschine mit einer solchen Bogentransporttrommel

Sheet feeder for printers has two photoelectric sensors, nearer sensor detecting incorrect orientation of sheets in stack, while further detects notch on edge of sheet which acts as mark for stack when sheet is correctly oriented

Device for stream feed of paper sheets has common vacuum supply for suction chambers located on underside of upper conveyor belt run, with each suction chamber pneumatically connected to common vacuum supply via restrictor

Method of feeding sheets to a sheet-processing machine, sheet-smoothing method and device