Abstract: A method for digital printing of a composite film or a film is provided in which a corona pretreatment of the composite film or the film is performed, the film is primed with a primer, a corona pretreatment of the primed composite film or the film is performed, the corona-pretreated, primed composite film or the film is printed using a digital printing method, and a protective paint is applied on the printed, corona-pretreated, primed composite film or the film.

Abstract: The invention provides a packaging which has a container part for receiving or containing food, the container part being covered with a sealing cover. The sealing cover comprises at least one vent which serves to release the overpressure generated during the process of microwave cooking. The sealing cover has a peeling strength which lies between 4 and 20 N/15 mm, preferably between 7 and 15 N/15 mm, in particular 8 N/15 mm. According to one embodiment, the sealing cover consists of a PET-PP-composite, with the PP-layer used as the sealing layer, which is sealed to the container. In one embodiment, instead of PET, an oriented polyamide (OPA) is used. In one embodiment, the side of the sealing layer, which faces the lower part of the packaging is covered with an anti-fogging-coating, in order to prevent the condensing of water on the sealing.

Abstract: The present invention is with respect to an overpressure valve for packages with flexible walls, having a valve body able to be fluid-tightly joined with such a package. The valve body has a flat valve seat having thereon a diaphragm with a valve shutting part. In the seat there are valve openings, each having a number of concentric ring-like channels round it in the seat. The concentric channels take up a sealant, more specially silicone oil. The diaphragm is made of a single piece of material running on one side of the walls to the other without any holes therein. It is only kept in position in a middle part of the valve seat so that the diaphragm may be moved freely, at least over the valve openings. In the case of a preferred form of the invention, the diaphragm is slipped loosely into the valve body in which it is kept in position by a keeper in a middle part thereof. The keeper may be fixed in position by friction or by a keying effect.