Abstract: A method of producing overpressure valves for packaging containers supplied in a roll, transported in this form to a packaging machine, separated at the machine and attached to packaging containers by means of an adhesive coated surface. For this purpose the overpressure valves have a layer of emulsion bonding on their underside. To prevent individual layers of the roll from sticking together, the overpressure valves have an adhesive-repelling layer on their top side. The overpressure valves are connected to one another in one piece and in a row, and are separated consecutively in a packaging machine.

Abstract: Overpressure valves for packaging containers are supplied in a roll, transported in this form to a packaging machine, separated here and attached to packaging containers by means of an adhesive coated surface. For this purpose the overpressure valves have a layer of emulsion bonding on their underside. To prevent individual layers of the roll from sticking together, the overpressure valves have an adhesive-repelling layer on their top side. The overpressure valves are connected to one another in one piece and in a row, and are separated consecutively in a packaging machine.

Abstract: A bag evacuating and closing apparatus having two opposing jaws which face ends that move toward one another. The jaws encompass a top closure of a bag package to be sealed. The jaws have hollow spaces open toward one another which are surrounded by frames with sealing jaws disposed in the hollow spaces; the hollow spaces form a chamber that receives the top closure of the bag package. A sealing rib protrudes from one face end of the two frames and is interrupted in a middle region of the frame part at which the closure fold protrudes between the jaws. In this region, suction openings are disposed in the frame parts of both jaws; these suction openings pull two walls of the top closure tightly against the frame parts. After the top closure of the bag package has been tightly encompassed, air is extracted from the bag package by a vacuum, and subsequently, the top closure of the package is tightly sealed by the sealing jaws which form a sealing seam to close the upper end of the bag.

Abstract: A packing container comprising a tear-off part defined by predetermined lines of weakness and removable from a container wall, and a handle clip connected with a start portion of the tear-off part and comprising an overpressure valve which closes an opening in the container wall.

Abstract: An improved opener for a packaging container arranged to form an opening in one wall to remove the contents includes a tear-open portion surrounded by a weakening line and a pull tab connected to the tear-open portion. To enable use of the pull tab as a reclosure element, it has a stopper-like lower extension which has a complemental outline to that of the tear-open portion and on which a shear edge is disposed. The pull tab is firmly connected to the tear-open portion with a narrow strip of a fusing glue.

Abstract: A packaging container having a pressure relief valve which is suitable for packaging products that are vulnerable to oxygen and products that give off gases. The packaging container has at least one rigid and flat wall, which is surrounded by an offstanding peripheral flange and on the outside surface of which the pressure relief valve is secured. The pressure relief valve has a flexible membrane, which is secured on the wall in opposed peripheral zones by means of two adhesive strips. With its middle zone, the membrane defines a path and covers an opening in the wall. The opening is located in an indentation by means of which a pressure-action surface of the membrane is provided. A film of oil may be added in the middle zone to assist in preventing entrance of air into the container.

Abstract: An apparatus is proposed for volumetric metering and filling of liquids which includes a vertically extending dispensing chamber provided with a lower inflow and outflow opening and an upper vent opening. A float having an indicator ring is freely reciprocable in the dispensing chamber and scanning elements for controlling the inflow or outflow of liquid are disposed outside the dispensing chamber. Further control elements control a retarded inflow or outflow of the liquid via a throttle device, so that the upper and lower height, the criterion for accurate metering out of quantities of liquid, of the surface of the liquid in the dispensing chamber can be regulated.

Abstract: Sterile packages are produced which have a shaped depression and a closure sheet sealed onto this depression. In order to furnish sterile inner surfaces for the packages, two tubes of packaging material each of which have a sterile inner surface are slit lengthwise and opened out into flat strips in order to form the depressions and the closure strip. Depressions are produced in one strip, which is underlaid with a reinforcing strip; thereafter the depressions are filled and sealed with the closure strip, which has one layer comprising the strip made from the other tube and another layer from another strip. The sterile surfaces of the strips are arranged so that they face one another.

Abstract: A method is proposed for sterilizing packaging material of plastic, cardboard or combinations of the two, in particular for sterilizing preshaped packaging containers intended for receiving acidic products. In this method, damage to the packaging material or the packaging apparatus is to be avoided because of the mild thermal treatment involved. By subjecting the surface to be treated to a flow of a moist mixture of water vapor and air at a temperature of from 80.degree. to 140.degree. C. and having a moisture content of from 5 to 50%, sufficiently high degrees of sterility for the sterile packaging of acidic food products are attainable within relatively short treatment periods.

Abstract: A lid for a packaging container which include a tear-open part which is surrounded by a weakened line. The lid is molded of a composite material, which has an outer carrier layer of plastic, a middle barrier layer of metal foil and an inner heat-sealing layer of a thermoplastic synthetic material. The weakened line is produced as an indentation in the outer carrier layer by being heat-impressed using a heated tool.

Abstract: A lid for a packaging container including an easy opening tear-open part which is surrounded by a weakened line. The lid is molded from a compound material, which has an outer carrier layer of plastic, a middle barrier layer of metal foil and an inner heat-sealing layer of a thermoplastic material. In order to facilitate the initial tear of the tear-open part, the middle barrier layer is also thinned or ruptured at least in the starting segment in a location coinciding with the weakening line in the carrier layer.

Abstract: A sterilizing apparatus for packaging containers is equipped with a closable preparation apparatus for a mixture of hot air and sterilizing agent vapor and a sterilizing chamber, into which containers to be sterilized are introduced. The closure means for the sterilizing chamber includes means for suspending a container to be sterilized within the sterilizing chamber. In order to realize a reduced use of sterilizing agent and heating energy, the apparatus has a circulatory system of mixture supply. The sterilizing chamber, as well as a bypass parallel to it, forms a part of this circulatory system. The bypass and the sterilizing chamber are alternately connected with the circulatory system by means of a reversing valve during nonsterilizing and sterilizing periods. A circulating blower, an air heater, and a preparation apparatus are also part of the circulatory system.

Abstract: An apparatus for shaping, filling and closing packaging containers is proposed. In order to create an inert gas atmosphere in the head room of packaging containers which are to be closed with a foil strip and in order to distribute portions of a product in the containers, the apparatus has a gas-treatment device having a chamber which narrows toward the closure device. This chamber is defined at the top by the foil strip moving toward it, which is supported by a slide track, and at the bottom by the containers. Protruding into this chamber in the direction in which the containers are conveyed and overlapping the lateral rims of the containers are gas supply lines, which have gas outlet openings directed transversely with respect to their longitudinal axis. The outlet openings are disposed in staggered fashion on sides of the gas supply lines which face one another.

Abstract: A light weight packaging container, similar to a capsule and made by deep-drawing and/or stretching of a multi-layer foil composite, is composed of synthetic material and aluminum. An aluminum layer or foil having a thickness within the range of from one grain to a few grains is provided. At least one layer of synthetic material is fixed to the aluminum layer or foil. The total thickness of the synthetic layer or layers is substantially greater than that of the aluminum layer or foil. In one embodiment, only one layer of synthetic material is provided. In another embodiment, two layers of synthetic material are provided, one being fixed to one major surface of the aluminum layer or foil and the other being fixed to the other major surface of the aluminum layer or foil.

Abstract: A method is proposed for packaging products, particularly food products, and sterilizing them in an alternating high-frequency electromagnetic field. The product is first introduced into trough-like, preferably interconnected containers provided with a metallic layer; then the containers are closed with a synthetic film, brought within the range of an alternating high-frequency electromagnetic field, and finally sealed with a foil having a metallic lamina which covers the synthetic film.

Abstract: A container made from a foil or laminate material and provided with a cover which is sealed to a flange of the container by the application of heat. In order to facilitate removal of the cover, all or all but one of the corners of the container have cuts or kerfs extending from the outer edge up to the welded bead. To open the container, the tab defined by each kerf is grasped and pulled upwardly so that the adjacent strip of cover and flange is removed by tearing along one straight side of the polygonal container. The procedure is repeated at successive sides until all or all but one of the edge strips have been removed.

Abstract: A process and a device for producing bags from a strip of thermoplastic material wherein mated layers of foil strip are supplied to serially arranged bonding devices to provide bonded seams extending over the width of the layers at specific intervals corresponding to the width of the bags with said bonding devices being alternated with cooling means to lower the temperature of the bonded areas and thereafter advancing the material to a cutting device designed to separate the bags divided by the bonded seams from the chain of bags produced by the bonding operation.