Abstract: A material cutting and feed roller has a peripheral roller surface that conveys the material to be cut, and a cutting device within the roller that cuts the material. The cutting device has a blade that, when cutting the material, passes through a closeable opening located inside the peripheral surface of the roller. The closeable opening through which the blade passes during the cutting process is closed when the cutting process is not occurring.

Abstract: For the winding of a material web on a driven winding roll, it is cut through after the completed winding of a winding roll and the start of the following web is fastened on a winding core. The web is fed in the winding roll via a guide device, preferably consisting of a winding roller, and, after being cut through in a guide channel laid around a winding tube. In order to be able to wind the web with alternating outer sides into a winding roll, the web is fed, according to the desired outer side, from the left or from the right on winding in the winding tube. The winding tube is driven with a corresponding one of two opposite directions of rotation.

Abstract: The invention relates to a method for cutting webs of material (12), which rest upon the peripheral surface of the cutting and feed roller (1) and to a cutting and feed roller (1). These webs of material are cut through by means of a cutting device that, when in its position of rest, is essentially located inside the lateral surface (2) of the cutting and feed roller (1). This cutting device comprises at least one blade (4) that, when cutting the web of material (12), passes through an opening (3) located inside the lateral surface (2) of the cutting and feed roller (1). The opening located inside the lateral surface (2) of the cutting and feed roller (1), through which the at least one blade (4) passes during the cutting process, is closed when a cutting process is not occurring.

Abstract: For the winding of a material web on a driven winding roll, it is cut through after the completed winding of a winding roll and the start of the following web is fastened on a winding core. The web is fed in the winding roll via a guide device, preferably consisting of a winding roller, and, after being cut through in a guide channel laid around a winding tube. In order to be able to wind the web with alternating outer sides into a winding roll, the web is fed, according to the desired outer side, from the left or from the right on winding in the winding tube. The winding tube is driven with a corresponding one of two opposite directions of rotation.

Abstract: A sleeve for pressing rollers consists of an internal tube made of expandable material whose inside diameter is adapted to the diameter of the roller that is intended to carrying said material and that is connected with an outer dimensionally stable casing tube. To prevent oscillations of the casing tube that would impair good printing, the latter is provided at its terminal areas with carrying discs or bushings that at least have segments whose boreholes are adapted to the diameter of the roller with a snug fit or a pressing fit.

Abstract: An ink chamber doctor, bearing two doctor blades that are arranged in the shape of a roof can be placed in position at an anilox roller of a printing machine and moved away from the same. To guarantee that the central plane of the ink chamber doctor always agrees with a diametral plane of the anilox roller so that the result is a uniform wearing of the doctor blades, the side faces of the strip-shaped housing of the ink chamber doctor bear guide means, which can be used in guides of the side members. The ink chamber doctor can be slid in the guides at least in its end region facing the anilox roller up to its positioning at said anilox roller in a plane that includes both the central plane of the ink chamber doctor and also the axis of the anilox roller. Furthermore, means for pressing the ink chamber doctor against the anilox roller and/or for holding the ink chamber doctor at the anilox roller are envisaged.

Abstract: A sleeve for pressing rollers consists of an internal tube made of expandable material whose inside diameter is adapted to the diameter of the roller that is intended to carrying said material and that is connected with an outer dimensionally stable casing tube. To prevent oscillations of the casing tube that would impair good printing, the latter is provided at its terminal areas with carrying discs or bushings that at least have segments whose boreholes are adapted to the diameter of the roller with a snug fit or a pressing fit.

Abstract: A separating device for severing perforated tube sections includes an advancing mechanism and a tearing mechanism which respectively include opposing rollers or cylinders which are situated on both sides of the tubular web to be separated and over which endless transport bands are guided. The rollers or cylinders of the tearing mechanism can be moved in the direction toward the tubular web by a control element. The opposing rollers or cylinders in the tearing mechanism are respectively situated in swivel arms that are arranged such that they swivel around swiveling axes that oppose one another in the transport direction of the tubular web and the swivel arms swivel apart in opposite directions.

Abstract: The invention relates to a digital electrostatic printing machine, comprising a cylinder with an electrostatically chargeable surface (PIP cylinder), to which charging electrodes, a laser write head and a quench electrode are assigned, and comprising an ink applicator, a transfer cylinder and a central cylinder. According to the invention, the ink applicator comprises an engraved roller.

Abstract: When manufacturing bags from tubular paper sections of a single layer or multiple layers, at least one end of each flat, tubular section is expanded into a bottom square. Lateral flaps formed in this way are folded such that they overlap and partially cover corner flaps. In order to easily bond expanded bottom squares together, the regions of the tubular sections which are to be bonded together are provided with coatings of thermoplastic which are heated and pressed together.

Abstract: The handles of bags, provided with legs, are cemented to both sides of the opening sides of the bags. The handles are U-shaped handles made of strip-shaped material. Parts of the handles are folded over onto the side walls of the bags and fastened with adhesive spots to the side walls of the bags or to the non-folded over segments of the legs. After the legs have been glued to the continuously conveyed bags, the handle parts are folded over onto the side walls of the bags around prerupture lines of the legs in the direction of transport. The handle parts are folded over by at least one fold-over rod extending at a right angle to the direction of transport.

Abstract: A device for eliminating defective flat objects, which are being conveyed individually and at a distance from each other, preferably tubular segments or sack workpieces during the production of sacks, and for forming stacks of flawless objects, said device comprising a twin belt conveyor, which conveys the objects and comprises groups of continuous belts that are spaced apart and cycle parallel to each other; comprising a system for scanning the objects; and comprising a shunt, which eliminates the objects that are recognized to be defective. Behind the discharge end of the twin belt conveyor there is a stack shaft with an intermediate stacker plate, and before the discharge end there is a rake-shaped deflecting element, which forms the shunt and can be moved between the bottom conveying run of the twin belt conveyor and which guides the objects, recognized to be defective, into a place of deposit, arranged above the stack shaft.

Abstract: When manufacturing bags from tubular paper sections of a single layer or multiple layers, at least one end of each flat, tubular section is expanded into a bottom square. Lateral flaps formed in this way are folded such that they overlap and partially cover corner flaps. In order to easily bond expanded bottom squares together, the regions of the tubular sections which are to be bonded together are provided with coatings of thermoplastic which are heated and pressed together.

Abstract: A printing machine, preferably a flexographic printing machine, is provided with at least one counter-pressure cylinder and with at least one printing roller and one engraved roller, whose one end floats in the frame. To intercept the free ends of the printing roller and the engraved roller during the printing operation, the bearing blocks, in which the journals of the free ends of the printing and engraved rollers are supported in the slid-in state, can be moved in guides at right angles to the printing and engraved rollers in the frame.

Abstract: A doctor blade arrangement for a rinse inking unit of a rotary printing machine consists of a doctor blade carrier formed by a profile strip with a groove type recess. Two doctor blades adjustable at an inking roller are fixed on the doctor blade carrier almost like a roof and parallel to each other. The two doctor blades together with the inking roller, the groove type recess of the doctor blade carrier and sealings materials provided for the same at the end side border a dye chamber. In order to assure a good sealing of the dye chamber against the outcoming dye, the groove type recess is provided with a central middle part forming a main chamber and end-side side parts forming secondary chambers, which are connected with the main chamber through throttle gaps. The tube feeding the dye leads into the main chamber. The side parts are provided with the pipe lines discharging the dye and with the exhaust holes.

Abstract: An apparatus for manufacturing cross bottom sacks from laid-flat tubular sections consists of a frame having:- a table, means for holding the tubular section thereon in a processing station where the ends of the tubular section become opened out into a bottom square or rectangle, a suction gap arranged in the table in the zone of one of the ends of the tubular section, and suction means mounted in the frame above the suction gap and which is able to be raised and lowered for opening one end of the tubular section. Above the plane of the tubular section situated in the processing station, a slide can be extended and retracted over the table in the direction of the median line of the tubular section, the median line of the slide defining with the median line of the tubular section a plane perpendicular to the plane of the tubular section. The width of the slide is less than the interspacing of the hypotenuses of the two opened-out corner folds from each other.

Abstract: A device for isolating stacked flat workpieces includes a driven, web-like supporting framework which rotates in a frame. Rotating rolls are supported at equal intervals on a circle concentric to the turning axis of the framework. Each roll is provided with a row of suction boxes. Driving gears of the rolls are rotated, in a direction opposite to the rotation direction of the supporting framework, by a spider gear fixed to the framework. Intermediate gears, through which the spider gear rotates the driving gears, are supported in the supporting framework. A stacking cartridge is placed at the external cylinder defined by the row of suction boxes in such a way that each row of suction boxes of each roll withdraws an exposed workpiece from the cartridge. A transport device which removes an isolated workpiece and further transports the workpiece is placed at the external cylinder. In order to prevent a stack from being set into vibration by a passing roll, a stacking cartridge completely confines the stack.

Abstract: An apparatus for the transfer of flat workpieces from a first conveyor to a second conveyor consists of a first conveyor with two endless pulling members circulating parallel to each other over guide wheels or drive wheels which carry in pairs supporting elements with pins. The pins perforating and conveying the workpieces project above a table forming the conveyance path by virtue of the supporting elements and the pins having attachments which run in guides that are parallel to the table and which displace the attachments towards each other. The pulling members of the second conveyor carry in pairs supporting elements with pins which project above a table forming the conveyance path. In the transfer zone of the two conveyors, a plunger is arranged in the frame and mounted in guides. The plunger can be raised and lowered and impales the workpieces onto the pins of the second conveyor.

Abstract: A device for pulling open continuously cross-conveyed tube sections for the purpose of forming bottoms in the manufacture of sacks has support tubes provided in pairs and connected to vacuum sources by lines. Each of the support tubes forms the coupler of two parallel connecting rods housed in a machine frame so as to rotate and is equipped with a row of radial suction units. A crank is connected to a shaft of a parallel connecting rod. A crank pin, supporting a slide ring or a roll, slides in a radial guide attached to a shaft. The shaft of the guide is offset relative to the parallel connecting rod shaft such that an essentially translational movement corresponding to the conveyance speed is superimposed on the opening movement of the row of suction units. In order to achieve a better opening of the tube section ends even at higher conveyance speeds, the radial guide is formed in a curved shape such that the time of uniform motion of the suction units and the tube section is lengthened.

Abstract: A doctor blade device of a rinsable ink application device of a rotary press is cleaned by first pumping ink back out of an ink chamber of the doctor blade device via a discharge line into an ink tank. Subsequently, from a solvent tank and via a feed line, solvent is directed into the ink chamber. During a predetermined time span, solvent is directed via the discharge line into the ink tank. Subsequently, the solvent, which is still contaminated with ink, is pumped into a contaminant chamber within a predetermined time span. The solvent flow from the solvent tank is interrupted and the solvent is pumped into the contaminant tank. Fresh solvent is then pumped via the feed line into the ink chamber, the suction line to the solvent tank is closed, and the solvent is pumped via the feed and discharge lines within a closed rinsing cycle for a predetermined amount of time. The circulating solvent is then directed into the contaminant tank.