Abstract: A system and method for aligning two webs which are pulled off respective supply rolls, at least one of which is elastic in nature, the two webs being joined into a multilayered web. The system includes a first deflecting roller for depositing the elastic web on the second web, and second and third deflecting rollers located between the elastic web supply roll and the first deflecting roller. A traversing roller is located between the second and third deflecting rollers so as to form a loop therewith, a position of the traversing roller being adjustable relative to the second and third deflecting rollers for changing the tension on the elastic web. An alignment between marks on the elastic web and markings on the second web is monitored and, when there is a misalignment, an actuating drive coupled to the traversing roller adjusts the position of the traversing roller in order to change the tension on the elastic web and thereby align the marks and the markings as the webs are joined.

Abstract: A press roller exhibits an external interchangeable sleeve and an internal sleeve, which holds the external sleeve and which is provided with boreholes, which can be loaded with pressurized air, in order to facilitate the pulling on and off of the external sleeve. To feed the compressed air directly to the boreholes while avoiding buffer spaces that impede the pressure buildup, the boreholes are connected to compressed air lines, which are led through the interior of the internal sleeve.

Abstract: To regulate the temperature of the heated air in an apparatus for the pasting of plastic films having a rack having a table over which the workpieces are conveyed continuously by a conveyor apparatus, having a conveyor roller pair disposed in a gap of the table top and supported in the rack, consisting of a lower counter-pressure roller and an upper suction cylinder, having a conveyor cylinder acting together with the suction cylinder which successively transfers sections to the suction cylinder, and having a broad-slit nozzle directed to the roller gap which blows in a controlled manner heated air to the roller gap, the temperature directly after the pasting of the pasted region of the workpiece at which a good pasting occurs is determined as the nominal value and the temperature of the heated air is regulated to this nominal value.

Abstract: A system for the alternative charging of at least one sack filling machine and/or of at least one truck with pourable material, which is stored in a plurality of silos, which are firmly braced by columns, whereby each of the truck and the sack filling machine can be moved under desired silo outlets, and whereby, following the filling of the sacks, the sacks can be transported from the filling system over a totally or partially traversible intermediate conveyor to one of several conveyor belts. The intermediate conveyor, assigned to at least one filling machine, is designed as a traversible elevator at least over some regions. When in the working position, the discharge end of the conveyor corresponds with one of the conveyor belts, arranged above the required passage height necessary to move the sack filling machine or the truck.

Abstract: A welding cylinder, which is mounted in a frame, is provided with welding bars, which can be adjusted continuously in the radial direction, run parallel to the axis of rotation, and are distributed at uniform angular intervals over the circumference. One part of the welding cylinder's circumference is enveloped by a continuous pressure belt, whose loose side travels over guide rolls and rollers of a web storage. Between the guide rollers, bordering the pressure strand of the pressure belt, the web, to be provided with cross welds, runs up onto the welding cylinder and down from it. To adjust in a simple manner the guide rolls of the pressure belt to the different diameters of the welding cylinder, two swivelling and locking levers, whose free ends bear the guide rollers, over which the pressure belt runs up onto the welding cylinder and down from it, are mounted in the machine frame.

Abstract: Mounted in a frame is a welding cylinder, which is provided with a rotary drive and welding bars, which are distributed at uniform angular distances over the circumference, run parallel to the axis of rotation, can be adjusted continuously in their radial direction by means of their supports, and can be moved in and out in the radial direction relative to their supports for the purpose of activation and deactivation. For the purpose of identifying the respective welding bar, which has executed a specific weld on a film tube passing through, an embossing die, which provides the welded web with a distinct marking, characterizing the welding bar, which has executed the respective weld, is mounted in the circumferential direction in front of or behind each welding bar.

Abstract: To prevent socalled fish eyes or to reduce the number of fish eyes per unit of area in plastic films, manufactured according to the casting process or according to the blown film process, the number of fish eyes per unit of area is measured in the tubular film, which is cast or blown or collapsed. When the measurement reveals a number of fish eyes per unit of area that exceed a specified value, nitrogen or antioxidants are blown or put into the hopper until the number of fish eyes per unit of area falls below a critical number.

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: The invention concerns a process and a device for the recognition of screws used in extruders or metering devices. In order to create a process that excludes the possibility that mixtures of granulates or powders with incorrect mixing ratios occur through installation of inappropriate screw shafts in metering screws, the screws are coded and the code is electronically identifiable.

Abstract: A variable-diameter knife roll is provided with a knife extending parallel to the axis of the roll placed generally radially on a diametral plane, such knife being mounted on a knife carrier able to be adjusted radially outwardly and inwardly. In order to be able to rapidly and simply set the knife roll to suit different formats the knife carrier is articulatingly connected with the joints connecting the two links of two expanding grilles or with respectively one of the arms extending past such joints, of one of the links of the two expanding grilles. Respectively one inner joint of a link of one of the two expanding grilles is arranged fixedly on a knife roller shaft and the respectively other inner joint of the other link is arranged for adjustment in the axial direction on or in the knife roll shaft.

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: A doctor blade device for an inking rinse unit of a rotary printing machine, including a doctor blade support, provided with an ink channel, on which two parallel doctor blades that are adjustable in relation to a form linking roller are affixed and--together with the form roller, the doctor blade support and packing pieces, which are made out of an elastomeric material and clamped adjacent to the blades and roller by the support--delimiting a closed ink compartment, and including lines for the transport of ink into and out of the ink compartment. In order to be able to replace the packing pieces quickly and easily, they are held in their seats by clamping quick release closure.

Abstract: The invention relates to a device for the separation of stacked objects, the device comprising a stack bearing area, which is formed by a grid of rollers, travelling along the bottom area of the stack, whereby the rollers of the grid of rollers are positioned at an angle relative to the roller grid's direction of motion, and the device comprising a suction element and a conveyor, which reaches under the stack surface, in order to take away the flat objects separated from the stack. The invention provides an arrangment that automatically sets the rollers of the grid of rollers into self-rotation.

Abstract: A device for removal of slips from a continuously transported slip web is composed of an advancement roll pair which continuously advances and holds the slip web. A blade cylinder pushes a respective lead end of a slip into an open gripper of a gripper cylinder. A device is arranged between the advancement roll pair and the blade cylinder and provides transverse perforated lines. A rotating tear-off segment cooperates with the blade cylinder. In order to enable a simple and rapid adaptation to different slip formats, the advancement speed of the advancement rolls, the transverse perforating device and the angle of action of the tear-off segment are correspondingly changed relative to the blade cylinder.

Abstract: To control the film thickness in a blown film extrusion line with reversing or rotating takeoff of the film bubble, the thickness profile of the blown film bubble is measured over its circumference. Different temperatures can be applied to sections of the film bubble by a die ring divided into heating sections provided with control elements or by heating elements, forming a ring around the extruded film bubble and provided with control elements. In order to correctly assign the position of the measured thickness profile to the heating sections of the die ring or the heating elements, the extruded film bubble is provided with a mark in the region of the die ring or the heating elements and the rotation of this mark is measured by a measuring device at specified intervals from the die ring or the heating elements.

Abstract: A casing for printing presses includes a mantle tube of aluminum and provided with inner, collar-like bands. The casing is shrunk over a two-layer inner tube. The use of hard foam used, in known casings, to connect the outer mantle tube to the inner, two-layer tube can be eliminated in this way. This is advantageous since practical operations have shown that hard foam is susceptible to chemical, thermal and mechanical stresses.

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: A device to lay flat a film tube drawn from an inflated film bubble generated in a film blowing system includes lay-flat platens which delimit the film bubble and which are placed against the bubble in the form of a wedge. The platens are positioned in front of the squeeze rollers of a film take-up and winding device and have slip elements arranged transversely relative to the take-up device. A driven reversing frame can be provided to hold the lay-flat platens, support the squeeze rollers, and support guide rollers and turning bars about its rotating axis in a pivoting fashion. In order to decrease the friction between the film tube which is to be laid flat and the lay-flat platens, particularly for a reversing take-up, the slip elements have hollow sections including air blast nozzles or air blast slots facing the film tube to be laid flat. The hollow sections can be connected by lines to an air blast source.

Abstract: A device for manufacturing a multilayered tube formed of paper webs that are provided with transverse perforations at identical distances, wherein sections of the tube are torn off in order to manufacture paper bags, includes at least one perforating knife that is arranged in the machine frame and fastened to a rotating shaft. The perforating knife provides the paper webs with transverse perforations, and the radial distance between the perforating knife and the shaft may be altered so as to adjust the format of the bags. In addition, the device includes transverse gluing cylinders that are arranged in the machine frame, which are provided with transverse gluing bars and which cooperate with devices for applying glue. Also included is a longitudinal gluing roller that applies glue which forms a longitudinal adhesive seam onto the edges of the paper webs which are laterally offset with respect to one another and guided together via guide rollers before the paper webs are folded into a tube.