Abstract: In the packaging industry finished packing containers are frequently transported by means of chain conveyors between different machines or handling points. A reorientation of the packing containers, e.g. from a horizontal to a vertical position, may then be required. To achieve this, an arrangement may be included as an integrated part on a conveyor, making use of the chain and drive elements of the conveyor. The chain is then led with the help of pulleys on a path which is such that several parts of the chain, while successively changing position, travel close to the packing container conveyed so that the latter during its advance through the arrangement is reorientated from a horizontal to vertical position.

Abstract: An arrangement for the sealing of thermoplastic-coated packing material of the type which includes at least one layer of an aluminum foil. The arrangement includes an inductor (3) connectable to a high-frequency source of current which is constituted of a U-shaped loop of electrically conducting material. The legs of the U-shaped loop are parallel and are situated close to each other, and the inductor (3) a core (10) of ferrite material between its legs. The core of ferrite material has local inserts (11) of ferrite material of substantially higher permeability than the surrounding portions of the core (10) and the local inserts (11) are installed in regions of the sealing arrangement where strong local heating is required in the sealing joint or where the sealing pattern needs to be influenced.

Abstract: A bottom design for packing containers of the type manufactured by folding and sealing of plastic laminated packing material. To prevent the absorption of liquid contents by the fibrous carrier layer of the material on unprotected cut edges a folding pattern is created in accordance with the invention which ensures that all cut edges (11) at the bottom (4) of the packing container are situated under protecting parts of the packing material.

Abstract: A method and an arrangement is disclosed for the detection by photoelectric means of markings made on a printed, decorated material web. The markings comprise two groups of stroke markings, the markings of a first group being arranged to be sensed by a first photocell element, which, on sensing the first group markings causes the output of a second photocell element, which senses the stroke markings of a second group of making to be fed into a memory unit for continuous comparison with a stored value. In response to the comparison, a control signal is generated to control the performance of various operations on the web.

Abstract: A method and an arrangement for the feeding or transfer of objects from a first to a second conveyor, the latter being driven at a higher constant speed than the first conveyor. In such a transfer of objects between conveyors equipped with driving or load contacting elements, damage to the objects is avoided if these are given a temporary increase in speed at the moment of transfer. The increase in speed occurs because the driving element of the first conveyor is tipped forward directly before the transfer in the direction of movement of the conveyor, so that the total speed of the object at the moment of transfer substantially corresponds to the speed of the second conveyor.

Abstract: In the application of preprinted film wrappings around packing containers it is sometimes required that the text or decorative pattern of the wrapping should be located in a certain position in relation to the edges of the finished packing container. A method of film wrapping around an object, e.g. a packing container, is described in which a film web is joined to a waste material web and is advanced with the help of this until the decoration is situated in a predetermined position. Subsequently the packing containers are wrapped while the film web is delivered from a film roll whereupon the sealing is performed on a previously unused part of the film web. Apparatus for carrying out the method is described which comprises co-operating sealing jaws and a conveyor consisting of two parallel parts.

Abstract: The invention relates to a package of the type having a container body with four side walls, opposite each other in pairs, and a top end wall which along a lateral edge is joined to the container body through a triangular, double-walled lug. The package, moreover, possesses a sealing fin which extends from the point of the said triangular lug and out over the top end wall. This sealing fin is folded down along at least a portion of its length against the top end wall and is retained in its folded down position. The said sealing fin has one or more cuts or perforations weakening the packing material. The cuts are arranged preferably at right angles to the sealing fin in the material layer of the sealing fin which is nearest to the top end wall in the folded down position of the sealing fin.

Abstract: The invention relates to a laminated material which comprises a carrier layer of paper or cardboard and an outside layer of extruded polythene applied to one side of the carrier layer. To the other side of the carrier layer is applied a first binder layer of polythene and a layer of aluminum foil placed against the binder layer. A second binder layer of EAA is provided for the bonding together of the aluminum foil with an inner polythene layer which has been produced by blowing and which has a substantially higher modulus of elasticity and strength than the slot-extruded polythene layer. The invention also relates to a method for the manufacture of the laminate by making use of the heat content of the first slot-extruded binder layer of polythene for heating up the second binder layer of EAA to such a temperature that an effective bonding on the aluminum foil is obtained.

Abstract: Packing container blanks for gable-top packages are cut out of a material web which, up to now, has caused an appreciable amount of waste material, since the edges of the blanks are irregular and cannot be "dovetailed" into one another. A packing container blank is provided with partly straight, parallel lateral edges (11,12), and partly transverse edges (11,12) which are indented according to a regular pattern which is repeated over the width of the blank. As a result of the indentations, the edges of the blanks too can be formed without wastage.

Abstract: The invention relates to an opening arrangement for a package of the type which comprises a double-walled triangular lug (15) communicating with the interior of the package and being connected to one lateral edge (14) of the package and which comprises a sealing fin (10) extending over the top side (11) of the package and the said triangular lug (15). On both sides of the base line of the sealing fin (10) parallel tearing perforation lines (6) located opposite one another are provided which at a point on the top side of the triangular lug (15) converge uniformly in an arc-shaped manner so as to extend over the lateral edges (13) of the triangular lug (15) and converging on the underside of the triangular lug (15) without the said tearing perforation (6,6') having any breaks or point of discontinuity other than those arising in connection with the perforation (6') passing over the lateral edge (13) of the triangular lug (15).

Abstract: A packing machine for the manufacture of packing containers wherein tubular packing container blanks which in flattened condition are placed into a magazine and wherein the feeding out of packing container blanks from the magazine is accomplished by a reciprocating driving element (7) located at the lower end of the magazine (7) which is provided with fingers which engage the open ends of the container blanks and to feed out one blank at a time is disclosed. As a result, a reliable operation, independent of the thickness of the blank, is obtained.

Abstract: A method for thinning a web along selected regions of a blank or a web of a material having at least one layer of paper or cardboard by passing the material over one or more die rolls, each being provided with raised portions which bring the material into contact with a rapidly rotating grinding wheel which grinds which selected surfaces of the material away.

Abstract: The invention relates to a printing plate for offset printing comprising a number of printing patterns, having similar outer contours, which are located on the printing plate parallel to one another and adjoining one another but displaced in longitudinal direction in relation to one another. The printing plate is made in one piece with a width which corresponds with the combined width of the individual printing patterns and the printing plate is provided along its front edge and its rear edge with a stepped edge contour. The printing plate is arranged around a carrier cylinder which is fully surrounded by the printing plate, parts of the printing plate being received in a holding device arranged within the contour of the carrier cylinder.

Abstract: A more space-effective method and device for the feeding of a material web (1) is obtained by making use of a web feeding unit (2) for feeding as well as correction of register. The web feeding unit (2) is provided for this purpose with two driving devices (14,15) which during operation are used alternately for feeding and register correction respectively of the material web.

Abstract: Sensing arrangements on material rolls are used to give advance warning when the material web forming the roll approaches its end. Usually this involves the sensing of the reduction of the the roll diameter with the help of a sensing device resting against the roll periphery. In the case of roll suspensions where the center of the roll is not fixed, these sensing arrangements cannot be used. The present invention uses a sensing arrangement which comprises a field-generating element, e.g. a permanent magnet, present in the center of the roll, together with a movable sensing device resting against the periphery of the roll, e.g. a heavy current switch which is acted upon at a certain predetermined field strength, and in a suitable manner indicates that a roll replacement is imminent.

Abstract: The manufacture of non-returnable packages is frequently carried out by the conversion of web-shaped, laminated packing material to a tube, filling of the tube with milk, and sealing and forming the filled packing containers to the desired shape. During the forming, which is done by external forming devices, the contents are used as a mandrel or a holder-up for the forming device, so that the desired shape can be achieved without creasing or other deformations. The above-mentioned forming principle works less well if the packing containers are not completely filled, but have a certain air space or headspace. The proportioning of the contents also becomes uncertain and the desired accuracy of volume cannot always be achieved. These difficulties are overcome by the invention wherein a sealed off part of the packing material tube is pressurized with the help of gas during the forming process, so that the internal back pressure required during the forming is obtained, independently of the quantity of contents.

Abstract: In the manufacture of packing containers from laminated material contact between the inner layer of the material and the contents is avoided by doubling up the cut edges present in the packing container. It has proved to be difficult to perform a secure folding and sealing of the folded edge without damage to the material, since the outer, water-tight layer of the material consists of very thin, heat-sensitive thermoplastic. This difficulty is overcome by carrying out the folding and sealing of the edge of the material web gradually while at the same time supplying heat or glue. By supplying the sealing-promoting agent as late as possible during the course of folding, damage to the material as well as to the folding arrangement is avoided.

Abstract: In the manufacture of packing containers of the type containing a liquid product with a certain portion of "solid" particles (e.g. soup with pieces of fruit) it is difficult to fill the packing containers in such a manner that the desired proportions of liquid and solid contents are safeguarded. This is the case in particular in modern, fast working packing machines, since the filling time is short and a rapid filling, moreover, increases the risk of contents ending up in undesirable places and rendering difficult the sealing of the packing container. In accordance with the invention which relates to a method as well as to an arrangement for the manufacture of packing containers, this is solved by feeding the solid and liquid parts separately via two filling pipes, the feeding of the liquid contents being ended only after the feeding of solid particles has been ended.

Abstract: An arrangements for ultrasonic sealing comprises a sealing jaw which is combined with an ultrasonics source and a counterjaw. During the sealing the parts which are to be sealed to each other are pressed together between working surfaces of the jaws with simultaneous activation of the ultrasonics source as a result of which the parts are welded together. In the sealing of thin material layers it is very difficult to obtain a uniform compression over the whole surface which means that the risk of burning asunder or unsatisfactory sealing increases. In the invention this is prevented with the help of supporting elements which engage with two stop faces located in the nodal plane of the sealing jaw and on the one hand determine the minimum distance between the working surface, and on the other hand orientate the flexibly suspended jaw so that the working surfaces are parallel.