Abstract: An apparatus for calibrating and supporting an extruded film blown up into a film bubble made of a synthetic melt in an inflation extrusion installation consisting of supporting means driven by link rods whose inner ends are articulated in the median zone of each supporting means, and whose outer ends are articulated to brackets, which form parts of frames that carry spindle nuts at at least two points, and axially parallel screw spindles which are mounted on the basket-shaped frame and are provided with drive means, and have thread sections provided with threads of opposite hand screwed into said spindle nuts; that at a distance from one of said link rods, there is arranged an additional link rod parallel thereto and whose respective ends are articulated to a respective said supporting bar and to a said bracket.

Abstract: A printing press is provided with at least one counterpressure cylinder and with at least one printing roller cantilevered at one end in the rolling stand and at least one inking roller or screen roller of an inking system cantilevered at one end in the rolling stand, where the bearings of the printing roller and screen roller travel, in guide mechanisms, relative to the counterpressure cylinder. In order to ensure that the printing executed by means of the end region of the cantilevered impression cylinder is also perfect, a plate is coupled to the rolling stand, which plate is provided with bearings in order to accommodate the journals of the free ends of the printing and screen rollers. In this regard, the plate can be swung to either a retracted position, in which the cantilevered rollers are freely accessible, or to a operating position, where the journals of the free ends of the rollers are carried by the plate.

Abstract: The invention concerns an apparatus for welding the tubular sections of sacks, bags or the like, having a rotating drum and with welding stations arranged on the periphery of the drum which rotate, fixed in position, with the drum, wherein the welding stations are arranged laterally each on one end side of the drum. To ensure a crease-free processing of the tubular sections to be welded, grippers that can be caused to open and close are arranged on the drum in individual welding stations, for the seizing, holding and release of the tubular sections. A movable welding jaw of the welding station forms a flat bearing surface for the zone of the tubular section to be welded, while the drum itself, has a cylindrical peripheral surface.

Abstract: A blowing head for the manufacture of tubular film from thermoplastic synthetic resin includes ducts for the supply and removal of internal cooling air, at least one supply duct for fused synthetic resin which opens into an annular outlet nozzle, an external cooling ring encircling the extruded synthetic resin film and a supply of air at different temperatures to sectors of the external cooling ring which are distributed over the periphery of the extruded tubular film for differentially heating or cooling the film.

Abstract: The invention concerns a method and an apparatus for manufacturing a bag or sack bottom from tubular sections of paper or plastic web. Tubular sections of web material are fed into a feeding plane where they are subsequently sealed along selected seams by a sealing means. The sections are then inverted and fed in parallel to a scoring, gluing and folding section. The tubular section is then inverted again and passed to a pressing section. The tubular sections are stacked on top of each other in a partially overlapping manner as they are passed through the pressing section. After pressing, the tubular sections are passed to a separating station for again separating them before being passed to a packaging station. The invention concerns, moreover, an apparatus for operating the above mentioned method.

Abstract: A printing press consists of several printing units arranged in a row, each having one inking unit, and cylinders exchangeable for diverse print runs, the bearings of the exchangeable cylinder being arranged on a carriage displaceable in the printing press frame. An impression cylinder is mounted in the printing press frame. The printing press includes means for lifting out and removing the exchangeable cylinders. The conveyance means has a trolley displaceable on a rail. To allow the cylinders to be easily and rapidly exchanged the carriages are displaceable on at least one horizontal guide means of each printing press frame. Lifting jacks are assigned to the shaft journals projecting outwardly from the bearings.

Abstract: An apparatus for rotating workpieces fed in a laid flat position, has a pair of conveyor belts which fixes the respective workpiece eccentrically at one point and moves it forward, and at least one carrier belt that runs parallel to the pair of conveyor belts. To permit a reliable introduction of the rotational movement, at least one suction belt is arranged between the pair of conveyor belts and the carrier belt, using which a part of the workpiece that is spaced from the fixed point can be suctionally attracted.

Abstract: The invention concerns a printing press with several printing units arranged round an impression cylinder mounted in a frame, in which arrangement several gas blast devices for drying the web are arranged between the individual printing units. To allow the impression cylinder to be observed even in printing presses of a small size, the blasting devices are mounted for displacement on the frame in such a way that they can be displaced into and from a position at the side of the impression cylinder.

Abstract: A film blowing head for extruding a tubular web of a thermoplastic synthetic melt consists of at least one inner cooling ring and a pipe passing through the blowing head, wherein a central pipe is arranged with the formation of an annular space. The annular space is placed in an air conducting communication with the inner cooling ring. The cooling and supporting air is fed via lines into the annular space and is drawn off again through the central pipe. To permit cooling with very cold air, the pipe feeding the cooling air is surrounded, in the zone of the blowing head, by two concentric pipes with the formation of two annular spaces. The two annular spaces are connected with each other in the zone of the plane of the outlet nozzle gap of the blowing head by an overflow compartment that is closed towards the outside. Warm air is fed to one of the annular spaces, and is drawn off again through the other annular space.

Abstract: The invention concerns a multilayer sack or bag with side folds which consists of several tubular webs with side folds inserted one into the other, in which arrangement at least one open end is closed by a bottom. To form a bottom that is comparatively less thick, the outer tubular web with side folds has a projecting flap that extends over its width. At least one inner tubular web with side folds is inserted into this tubular web with side folds in such a way that it terminates at the distal edge of the flap. The projecting strip extending parallel to the flap of the at least one inner tubular web with side folds is folded over onto the outer side of the outer tubular web with side folds. The tubular webs with side folds, inserted one into the other, are folded together round the outer edge of this folded over strip and are fixed in this position.

Abstract: In an apparatus for the displacement of bearing blocks mounted on carriages which support shafts, a first carriage is carried for displacement in a carriage guideway fixed to the frame, and the other carriage is carried in a carriage guideway of the first carriage, these two carriage guideways being mutually parallel. To allow the carriages to be displaced with sufficient accuracy without expensive control devices, two spindle screw nuts designed as toothed belt pulleys are mounted in the first carriage parallel to each other and freely rotatable, and the screw spindles screwed into them are mounted selectively for free rotation and for being fixed, on the one hand in the machine frame and, on the other hand, in the second carriage. In the first carriage there is mounted a further drive belt pulley that is drivable by a motor and securable by a securing device, this further drive belt pulley driving an endless toothed belt that drives said spindle screw nuts designed as toothed belt pulleys.

Abstract: A process for applying an adhesive band with one adhesive side to the narrow rim of an elongated workpiece, particularly a coathanger of corrugated paper, includes the following steps: removing a workpiece from a magazine; sorting the workpieces into corresponding compartments of a compartmented disk carousel that rotates on an axis; forward cyclical rotation of the filled compartmented disk carousel, such that the workpieces placed in the compartments, which are positioned one on top of the other, are transported to other processing stations; at the next processing station, pressing the adhesive band, which has one adhesive side, onto the narrow rims of the flattened workpieces, which project from the compartments of the carousel; at another processing station, cutting the adhesive band and pressing it to the lateral profile of the narrow rim; at another processing station, folding and pressing the projecting edges of the adhesive band against the workpiece, and ejecting the fully processed workpiece.

Abstract: A device for winding a web, preferably a plastic film web produced in a blowing or casting process, includes a driven winding tube for a web, a web tension measuring roller, a driven contact roller positioned between the winding tube and the web tension measuring roller which, in the case of contact winding, can be positioned against the film roll being formed and which, in the case of gap winding, is positioned at a distance from the film roll. A control device controls the motors as a function of the feeding speed of the web and in accordance with the measured tractive force of the web, such that the coil hardness of the wound roll can be predetermined. In the case of contact winding, the torque of the winding motor is controlled according to the increasing diameter of the wound roll and the contact roller is driven at a speed that is controlled according to the tractive force of the web.

Abstract: A sack or bag has a front wall and a rear wall which are respectively connected laterally by a lateral fold, with a strip of the front wall together with the lateral folds on at least one of the two initially open ends being folded about a first folding line running transverse to the longitudinal axis. The corresponding strip of the rear wall remains in place and the folded-over strip of the front wall, as well as the strip left in place on the rear wall, are once again folded around the outer edge of the folded-over strip and attached in this position on the outside of the sack or bag. To make a sack or bag with a tight, leak-proof bottom portion, a corner tuck each is formed on both sides between the strips of the rear wall initially left in place and the side folds folded over together with the folded strip.

Abstract: A flattening and removing device for a plastic tubular film web produced by a stationary film blowing head in a blowing process has two deflecting rollers and two turning bars. The first deflecting roller and the squeezing roller are mounted parallel to each other between mounting plates that are rigidly connected to a turntable mounted in turning fashion in the frame floor. The second deflecting roller is connected by a support frame to a retainer having ends which are connected to gearwheels in eccentric fashion. The turning bars are each connected by support frames to gearwheels, and the center lines of all the gearwheels are aligned with each other and with an imaginary swivel axis. Thus, the diameter of the turning bars can be increased to the desired degree without impeding the passage of the flattened tubular film when the device is installed.

Abstract: In a printing machine with an impression roll and several printing mechanisms, the bearings of the size cylinders and the inking device supports can be moved with the screen rolls on guides of the printing machine stand, approximately radially to the impression roll. The drive of the size cylinders and of the screen rolls is derived from a central drive. In order to create a simple continuously running drive for the inking device rolls, the screen rolls are actively connected via a freewheel to the central drive. For the screen rolls, which can be moved away from the size cylinders, a continuously running drive is provided which consists of a toothed belt, driven by a servomotor, which loops around all of the toothed drive wheels of the screen rolls. The strands of the toothed belt and the strands of the toothed belt enclosing the respectively radial external idle wheels in a loop-like manner, extend in parallel with each other.

Abstract: An apparatus for the application of adhesive coated slips to a moving web or to workpieces being conveyed, and preferably to the drawn up and still open bottoms of bags, consists of pairs of feed rolls for a web of material and means for perforating and tearing off, or means for detaching, the slips from the web of material and of a transfer folding gripper cylinder for receiving and subsequent transfer of the slips or pieces of tube.

Abstract: The invention refers to a method for the reduction of the sag and/or of the different stress profile of a flattened tubular film web produced by a blown film process and made of thermo-plastic synthetic resin, transversely to its longitudinal direction. For the solution of the problem to provide a method according to which the sag and/or the different states of tension transversely to the tubular film web can be easily reduced or eliminated to a maximum degree, the tubular film web is heated along its width and then cooled and/or stretched. Furthermore, the invention refers to an apparatus for carrying out the method.

Abstract: A process for producing paper bags with handles glued to the insides of the facing opening edges, includes perforating a paper web with transverse perforation lines spaced at distances corresponding to the section lengths necessary to produce the bags. At a given distance from the transverse perforation lines the handles are glued in adjacent pairs to the web in such a way that the outer handle parts project beyond the transverse perforation lines. The web is joined together into a tubular web by folding over its side edges, such that the handles face each other. The overlapping side edges that have been folded together are glued to form a seam. The sections are detached along the transverse perforation lines and each section is provided with a bottom portion at the end opposite the handles.

Abstract: An apparatus for displacing bearing blocks which are mounted on carriages and which support shafts to be displaceable on a common carriage guideway, preferably for the displacement of bearing blocks of plate cylinders and inking rollers of an inking unit in carriage guideways of the inking unit brackets of a multicolour rotary printing press, with two lead screw drives driven by two electric motors, preferably stepper motors. Each bearing block is provided with a nut into which there is respectively screwed one lead screw assigned to each of the bearing blocks. Each of the two lead screws is provided with one lead screw drive each, fixed to the frame at the end zones of the carriage guideway lying opposite each other.