Abstract: A method of packing and, for purposes of extending its shelf-life, heat treating a food product in a packaging container of paper or paperboard. The packaging container is first filled wholly or at least partly with foam containing a non-oxidizing gas, such as nitrogen, whereafter the wholly or partly filled packaging container is filled with the pertinent food product. After this filling, the packaging container is, where necessary, filled with additional foam to ensure the headspace above the product level in the packaging container is entirely filled with foam when the packaging container is closed and sealed by thermosealing. The closed packaging container filled with product and foam is thereafter subjected to the heat treatment for purposes of extending its shelf-life at a treatment temperature of at least 115° C.

Abstract: To extend shelf-life, a method of heat-treating a food packed in a packaging container of a packaging laminate comprising a layer of paper or paperboard and outer, liquid-tight coatings of plastic. The 9ackaging container is exposed to a liquid heating medium sprayed against outer walls of the packaging container to heat and hold the food at a predetermined treatment temperature during a predetermined period of time so as to exterminate, eliminate or deactivate harmful microorganisms inside the packaging container. Thereafter, the food is cooled by cold water sprayed against the outer walls of the packaging container. To avoid the risk that liquid penetrates into exposed incision edges on the outside of the packaging container during the heat treatment, the packaging container, before this treatment, is brought into contact with a hydrophobic impregnation agent for absorption and penetration of the hydrophobic impregnation agent in the exposed incision edges.

Abstract: A method of packing and, for purposes of extending its shelf-life, heat treating a food product in a packaging container of paper or paperboard. The packaging container is first filled wholly or at least partly with foam containing a non-oxidising gas, such as nitrogen, whereafter the wholly or partly filled packaging container is filled with the pertinent food product. After this filling, the packaging container is, where necessary, filled with additional foam to ensure the headspace above the product level in the packaging container is entirely filled with foam when the packaging container is closed and sealed by thermosealing. The closed packaging container filled with product and foam is thereafter subjected to the heat treatment for purposes of extending its shelf-life at a treatment temperature of at least 115 C.

Abstract: A method of packing a food, and heat treating the food for purposes of extending its shelf-life, in a packaging container made of a packaging laminate comprising a core layer of paper or paperboard and outer plastic coatings of polyethylene, preferably low density polyethylene. The filled and sealed packaging container is conveyed through a treatment chamber or tunnel comprising a heating zone in which the packaging container is heated to the desired treatment temperature, e.g. 80-100° C., a holding zone in which the packaging container is kept at the desired treatment temperature and a cooling zone, wherein the packaging container during both of these treatment phases is subjected to an outer support pressure of less than 0.5 bar, preferably 0.2-0.3 bar.

Abstract: The present invention concerns a trolley (1) for an autoclave. The trolley is furnished with U-shaped profiles (7) to receive packages (6), which are to be sterilized in the autoclave simultaneously with their contents. The profiles (7) have a large number of openings. By the position and the form of the profiles (7) at least four sides of each package (6) are reached by steam of the autoclave. The angled sides (8) of the U-shaped profiles (7) assists in collecting the cooling water of the autoclave and lead it towards the packages (6).

Abstract: Method of handling a temporary disturbance in a packaging machine, having a moving endless loop (1) with carriers (2) for packages (P) supplied thereto at one portion of the loop and after certain packaging operation steps, being ejected from the carriers (2) at another portion thereof for final processing. The ejection of packages from said carriers (2) is interupted upon detection of such a disturbance, whereas the endless loop (1) continues to move with the non-ejected packages in the carriers (2).

Abstract: A method is described for sterilizing a fiber based container that contains a food product without damaging the container. The method involves placing the filled container in an autoclave, and supplying steam into the closed autoclave to raised the temperature to a sterilization temperature and at a pressure above atmospheric. The temperature required for sterilizing the food product is greater than the critical temperature for the container. The cooling phase involves introducing cooling air into the autoclave to reduce the temperature below the critical temperature without introducing moisture, and then supplying cool water to lower the temperature of the container rapidly. The use of this method provides effective sterilization in a reduced cycle time.

Abstract: Non-returnable packages for liquid contents, e.g. milk, are made frequently from a flexible packing laminate, and are provided with an opening arrangement in the form of a tear-off strip which covers a pouring opening in the packing container wall. So as to avoid spatter and spillage at the actual moment of opening, an opening arrangement for packing containers is realized comprising a pouring opening (8) which has a projection (8') of small area directed against the direction of tearing of the tearing strip (6). This part of the pouring opening (8) formed as a projection (8') thus will be opened first, and air will flow into the packing container, and the liquid level will drop so that the continued opening can be performed without any risk of spillage.

Abstract: A packing container is provided with an opening arrangement which comprises a hole (9) included in the container wall (7) and weakened areas designed and located so that the wall section between the weakened areas forms a tongue (10) projecting into the hole (9). The hole is closed by a cover strip (11) fitted over the hole and sealed to the container wall.

Abstract: The invention relates to a method and an apparatus for the processing of a material web to convert the same to individual packing containers filled with contents. Flexible packing containers for milk or other beverages are manufactured from tubular material which is filled with contents, formed and divided to packing containers with the help of alternately working forming and sealing jaws which are given a reciprocating movement in the longitudinal direction of the tube and in the transverse direction of the tube. In accordance with the invention the jaws are guided and driven by guiding and driving rods which run parallel with the material tube and to which different reciprocating movements are imparted.

Abstract: The presterilization of packaging machines for the manufacture of aseptic packing containers can be carried out with the help of sterile air and liquid sterilizing agent, which are blended so that a gas saturated with sterilizing agent of a suitable temperature and dew point is obtained. In order to achieve a rapid and effective volatilization of the liquid a circulating movement is imparted to the hot sterile air as the sterile liquid is introduced into the center of the circulating movement. An apparatus using this method comprises a chamber with a helical guide rail and a spray nozzle for the sterilizing liquid.