Abstract: The invention relates to a system and a method for controlling the composition of an ink mixture for at least one printing press, in which actual optical value of light are obtained, whereat the light has interacted at least with parts of the printing picture, which is generated by the printing press on the printing substrate using an ink mixture which is provided by an ink supply system and in which, due to the deviation of the actual optical value from optical reference values, a corrective ink mixture is created, which is added to the ink mixture which is provided by the ink supply system and which changes the ratio of the amounts of ink pigments therein, whereby first actual optical values are obtained inline, that is at running and just printed printing substrate, wherein these actual optical values are densitometrical values.

Abstract: The invention describes a sensor system (3) for measuring the thickness of flat material (2), which (1) [sic] is moved relative to the sensor system (3), said sensor system having a first sensor device (14) for measuring the thickness of the flat material (2) as well as means for generating an air cushion (23), which means are disposed in such a way that there results an air cushion (23) between that at least one side (16) [sic: (15)] of the sensor device (15) [sic: 14)] that faces the flat material (2) and the flat material (2) during operation. In the region of the air cushion (23), the first sensor device (14) comprises surface sections comprising porous material and/or material that is provided with micro-holes.

Abstract: The invention describes a sack (220) which (220) is formed by first transverse sealing seams (110, 150) from a foil tube (101), and which (101) is provided with at least a first vent channel (20), which runs largely parallel to the axis of the film tube (101), and whose inner (40) film layer has first vent openings for venting of the sack interior (210) into the first vent channel (20). It is characteristic that at least a second vent channel (140) is provided, which is connected to the first vent channel (140) by second vent openings (90, 100, 200), and which, in turn, has third vent openings (120), which vent the at least one second vent channel (140).

Abstract: The present invention describes a device for measuring and setting the web tension on a printing press (8) comprising several inking units (Dn), in which device measuring means (Mm,n) for measuring the web tension and setting means (Fn) for setting the web tension are provided, using which the web tension can be set actively in the case of unsteady web tension conditions. The invention is characterized in that at least one measuring means (Mm,n) and at least one setting means (Fn) are disposed in such a manner that the web tension can be measured and set between the print areas of two inking units. A control device is provided, which controls the at least one setting means based on the measured values of the at least one measuring means (Mm,n).

Abstract: An extruder die head for producing multilayered tubes made of thermoplastic material exhibits a central annular channel, which is provided with an annular outlet die. Into the outer limiting wall of the channel empty annular slits, which feed a polymer melt and which constitute the smaller diameter openings of truncated channels, formed between the internal and external shells of stacked, conical insert members. To reduce the axial length of the extruder die head, the annular slits, feeding the polymer melts, also empty into the inside wall of the central annular channel. The annular slits are the smaller diameter openings of truncated channels, formed between the internal and external shells of stacked conical internal insert members.

Abstract: An extruder die head comprises an internal cylindrical mandrel and a shell, which encloses said mandrel concentrically. Between said mandrel and shell an annular channel is formed that empties into the die slit. A polymer melt is fed through a line to the annular channel. To prevent the polymer melt in the area of the start of the annular channel from penetrating into a slit that forms between the mandrel and the shell due to heat expansion, there is between both mandrel and shell a ring with such a coefficient of thermal expansion that when heated up due to the polymer melt said ring seals the slit between the shell and the mandrel.

Abstract: An apparatus for supporting the shaft journals of a printing cylinder, that can be dipped into a dye vat, of a rotary roller printing machine, preferably a Rotogravure Rotary Roller Printing Machine, on support rolls for the purpose of exchanging the printing cylinder. In order to be able to exchange the printing cylinder in a simple and fast manner, the support rolls are arranged on horizontally movable beams via which the support rolls can be shifted between the bearings of the printing cylinder and an extended position in which there is provided a device that lifts and inserts the printing cylinder.

Abstract: The invention relates to a device for filling and sealing sacks, which are open on one side and are provided preferably with side folds. Said device comprises a filling station, which exhibits a filling pipe and serves the purpose of filling sacks; comprises various grippers for transporting away the empty sacks; holding the sacks in the filling station and transporting away the filled sacks, and comprises a conveyor belt, which starts below the filling station and serves the purpose of bracing and carrying away the filled sacks. Said conveyor belt exhibits at least one stand that revolves around two deflecting rollers. According to the invention, the conveyor belt in the region below the filling station can be lowered and raised again by swivelling the deflecting roller. Below the carrying run of the conveyor belt there is an additional vibrator in the region of the filling station.

Abstract: A device for manufacturing, filling and sealing thermoplastic sacks comprises a station, which comprises a forward draw unit for intermittently pulling forward a web of thermoplastic blown film and for its suspended feed in a vertical direction through a cross welding and cross severing mechanism, which provides the leading end of the blown film web with a cross weld and severs from said web a tubular segment above a gripping and transport mechanism. In order to pass the leading end of the blown film web quickly and without limply withdrawing to one side through the cross weld and cross severing mechanism into a stretched hanging position, there is a wall parallel to the feed path of the blown film web, and above the wall there are in its top region blowing air nozzles, facing the feed direction, between the wall and the feed path.

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 device for extruding multilayer plastic films, boards or tubes with a feed block, whose inputs are fed with polymer melts and which conveys the polymer melts from its inputs via individual layer channels to a slotted passage, forming its output. Temperature control units are arranged spaced part in the feed block along a width of to the individual layer channels for the purpose of heating or cooling.

Abstract: The invention relates to device for manufacturing, filling and sealing thermoplastic sacks that are open on one side. Said device comprises a first welding and severing station for forming the sack with a bottom weld, a filling station and a second welding station for sealing the sack and comprises a first pair of gripping pliers as the pair of transport gripping pliers for accepting the sack at the first welding station; a second pair of gripping pliers that are arranged stationarily at the filling station; and a third pair of gripping pliers as the pair of transport gripping pliers that transport the sack from the filling station to the second welding station. The invention provides a fourth pair of gripping pliers as the pair of transport gripping pliers that accepts the sack from the first pair of transport gripping pliers through the in-line arrangement of a stationary pair of gripping pliers and delivers to the pair of gripping pliers, which are arranged stationarily at the filling station.

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: Flat objects, conveyed in succession, are deposited on a slower forwarding conveyor in shingle formation so that a decelerating unit settles from the top on the deposited objects. To guarantee a flawless deposit of the workpieces in shingle formation, the decelerating unit comprises a group of bands or belts, which rotate parallel to each other over deflecting rolls and which are driven at the same speed as the forwarding conveyor and which are forced against the self-forming workpiece shingle, by means of the wheels or rolls, mounted on swivelable levers.

Abstract: A high strength, stretched, polyethylene plastic film is described. To obtain better stretchability, the film includes an effective amount of an acetate polymer. Typically, the polyethylene film contains up to 10% of acetate polymer. A suitable acetate polymer is polyvinyl acetate. A process for the production of a high strength polyethylene plastic film including an acetate polymer is also described.

Abstract: For cleaning an adhesive applicator with driven adhesive rollers, which can be rotated around vertical axes and which together with a housing, which is positioned at these adhesive rollers and whose side edges rest or almost rest against the adhesive rollers, forms an adhesive chamber, the adhesive is removed first from the adhesive chamber, for example by opening a floor seal. Then wash water is introduced into the adhesive chamber. The wash water is displaced into turbulent flows by driving the adhesive rollers alternating in opposite directions to each other. The wash water is drained after a fixed cleaning period.

Abstract: A device for pulling up the ends of transverse-conveyed flat tubular segments during the production of sacks or bags comprises lateral support elements, which run parallel to the conveying zone and between which a slit is formed that lies in the conveying plane and beyond which the ends to be pulled up project, and comprising mechanisms for pre-opening the ends by pulling apart the tubular sides that lie on top of each other. To pull up easily the ends of the tubular segments, the support elements in one section of the conveying zone form an obtuse angle in the shape of a peaked roof behind the mechanisms for pre-opening. In this section at least one roll is positioned in such a manner at the support elements that the leading tubular edge strikes the roll.

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: Anilox rollers of doctor units are provided with cells, arranged over the sleeve surface along spiral lines, in order to guarantee that the wear of the doctor blades, employed at said anilox rollers, is as uniform as possible. To prevent the ink from issuing between end-sided seals and the anilox rollers, one end section is provided with narrow sections that exhibit no cells or one end section is provided with end-sided sections, on which the cells are arranged on spiral lines with shallower pitch, or one end section is provided with end sections, on which the cells are arranged on spiral lines with opposite pitch.

Abstract: A method and an apparatus for transferring ink, varnish or adhesive during laminating or printing, particularly flexographic printing, operates with a roller in the form of a smooth roller for transferring the material from the smooth roller to a substrate. A plurality of spray modules arranged next to each other and individually controllable is provided for spraying the material onto one or more cylindrical portions of the smooth roller. A doctor blade is arranged following the point of transfer of the material as seen in the direction of rotation of the smooth roller.