Windmöller & Hölscher KG

The invention relates to a device ( 100 ) for unwinding a material web from a plurality of material web rolls ( 110 ), said device comprising: a machine frame ( 102 ); a main bearing point ( 105 ), which is located on and in particular fastened to the machine frame, for rotatably supporting a first shaft ( 109 ) for a first material web roll ( 110 ), wherein the material web roll can be unwound; a first drive shaft ( 121 ) for rotationally driving the first material web roll, wherein the first drive shaft can be placed directly or indirectly against the outer periphery of the first material web roll in order to transmit the drive force; a first pair of pivot arms, the pivot arms (122) of which are pivotably mounted in the machine frame, wherein one end of the first drive shaft is rotatably mounted in each pivot arm; a secondary bearing point which is located on the machine frame and which can take over the shaft from the main bearing point and/or is provided for supporting a second shaft for a second material web roll.

An apparatus is configured to separate a two-ply film web having a first ply and a second ply, the plies being joined via two side edges. The apparatus has two lengthwise slitting units that make a lengthwise slit into the first ply, with the slits being at a distance from the side edges. A pressing element moves in a direction orthogonal to that of a plane defined by the film web so as to space apart from one another the two plies. The pressing element is in contact only with a region of the film web that lies between one of the two side edges and an adjacent lengthwise slit, and is movable in the plane of the film web, and perpendicular to a longitudinal direction thereof, so that the pressing element is guided between the slit two plies to effect the separation of the film web.

The invention relates to a winding apparatus for winding a material web traveling in a direction of travel, having at least one blade for cutting the material web in a web direction into a plurality of partial material webs, and having a folding apparatus for folding the edges of the partial material webs. To furnish a winding apparatus that enables a material web with folded edges to be wound with as little wrinkling as possible, a folding element is furnished for each edge of the partial material webs. The at least one blade may be moved transversely to the direction of travel using a first oscillating apparatus. Using a second oscillating apparatus, the folding elements for the left-hand edges of the partial material webs, as viewed in the direction of travel, may be moved transversely to the direction of travel. Using a third oscillating apparatus, the folding elements for the right-hand edges of the partial material webs, as viewed in the direction of travel, may be moved transversely to the direction of travel. The first oscillating apparatus, second oscillating apparatus and third oscillating apparatus may be controlled by a control unit in such a manner that the folded edges of the partial material webs may be wound at an offset to one another.

The invention relates to a method for automated error management in a printing machine, in which a recurring print image is imprinted on a moving material web. To improve automated error management for existing inspection systems, a method is provided in which an inspection of the moving material web is controlled by a control unit and a function switch, the function switch being switchable at least between a first function mode and a second function mode, and in which the print image is acquired by a first inspection unit in the first function mode and forwarded to the control unit, and in which the print image is acquired by a second inspection unit in the second function mode and forwarded to the control unit.

The invention relates to a method for automated error management in a printing machine, wherein a recurring print image is imprinted on a moving material web. To improve automated error management for existing inspection systems, the invention provides a method wherein the print image is acquired by a line scan camera and forwarded to a control unit, in which a print error is recognized in the acquired print image, using an error recognition algorithm, and is saved by the control unit together with a position information and a status information. The position includes at least the margin position of the print error on the material web, and a plurality of recognized print errors are entered by the control unit in a cluster image depending on the position information and the status information, wherein the control unit recognizes an error cluster and error cluster information is output via the error cluster.

The invention describes a sleeve for sliding onto and removing from a winding shaft, which comprises a one-piece workpiece defining a cylinder, which workpiece comprises two edge regions each having an edge, the edge regions overlapping one another, the sleeve having a first diameter in a relaxed state, the sleeve in a clamped state having a second diameter which is different from the first diameter, the sleeve in the clamped state experiencing an elastic deformation as compared to the relaxed state.

The invention relates to a system ( 10 ) for improved introduction of a separating device ( 40 ) into a flattened film tube ( 2 ) of a blown film line ( 1 ), with a cutting device ( 20 ) for severing only a first tube side ( 2.1 ) of the film tube ( 2 ), in particular the film tube ( 2 ) which has not yet been flattened. Furthermore, the invention relates to a blown film line ( 1 ), as well as a method ( 100 ) for producing and providing at least two film webs ( 6 ).

The invention relates to a method for successively winding a film web onto a plurality of spools, wherein the film web is wound to form a first spool, and a tube and/or winding shaft for forming a subsequent second spool and the film web are moved closer to one another and/or are brought into contact with one another upstream of the first spool. The film web is cut, and thus an end of the film web is produced, with end is wound onto the first spool, and a new start of the file web is produced, which is wound onto the second tube. In order to cut the film web, the film web is cut partially in the transverse direction, at least one cut edge and at least one uncut region remaining in the transverse direction, the uncut region being subsequently torn off or cut off.

The invention describes an apparatus for separating a two-ply film web which can first be wound up at a winding point, wherein the two plies of the film web are first joined to one another via two side edges, wherein the apparatus comprises as features at least one and preferably two lengthwise slitting units, with which a lengthwise slit can be made into a first of the two plies of the two-ply film web, which are at a distance from side edges, so that the one ply is narrower than the two-ply film web, and at least one pressing element, which can be moved in the orthogonal direction of the plane defined by the two-ply film web, wherein the two plies of the two-ply film web can be spaced apart from one another, and which can be moved in the plane of the two-ply film web, but perpendicular to its longitudinal direction, so that the pressing element can be guided between the two plies of the two-ply film web.

The invention relates to a printing machine with hybrid printing technology for printing on a continuous material web. In order to create a printing machine with hybrid printing technology which is adaptable and flexible in use in the course of the current trend for digitization, the printing machine with according to the invention, hybrid printing technology for printing a continuous material web, is a printing machine with a rotating central cylinder, on the surface of which the material web is guided from a placement point to a separation point for printing; a plurality of inking units for digital printing of the material web are arranged in the region of an upper half of the central cylinder, and a plurality of inking units for flexographic printing of the material web are arranged in the region of a lower half of the central cylinder; an unwinding station is provided for unwinding the material web to be printed from a roll and a winding station is provided for winding the printed material web onto a roll, the unwinding station and the winding station being arranged on a first side of the central cylinder, with supply guide rollers for feeding the material web unwound from the unwinding station to the central cylinder and with discharge guide rollers for discharging the printed material web from the central cylinder to the winding station; the feed guide rollers and the discharge guide rollers being arranged on a second side of the central cylinder, with a feed guide roller for placing the material web onto the central cylinder at the placement point and a strip guide roller for detaching the material web from the central cylinder, the feed guide roller and the strip guide roller being designed in such a way that the placement point and the separation point are arranged on the lower quadrant of the central cylinder.