Abstract: Method for manufacturing a tube-shaped package having longitudinal sides and a bottom and made of flexible material, wherein the longitudinal sides of the package are sealed prior to forming the bottom and the bottom is formed by pushing an annular portion of the flexible material inward in a U-shaped arrangement at at least on closed end of the tube-shaped package.

Abstract: A method for producing a plastic film having improved characteristics, which consists in nebulizing on the faces, in the region downstream of the extruder, at least one “active substance” or a mixture of “active substances”, utilizing the various states of aggregation of the product generated by the temperature distribution. These substances modify the structure of the film, in particular its surface structure, by bonding and penetrating to a depth which is a function of the temperature, of the material of the film and of the type of substance used.

Abstract: A flexible container of the pouch type, made of material in film form, derived from a contoured tubular body formed by a film with longitudinal and transverse heat-seals of the two ends. The longitudinal heat-seal forms the edge of a longitudinal wing that is folded against the corresponding wall. A portion of the wing is joined to a corresponding portion of the wall with low-tack adhesive so as to surround a region preset to form a hole for access to the container, the first lifting of the wing opening the hole and the container, and the low-tack adhesive ensuring successive repeated opening and closure actions.

Abstract: A sheet composed of multiple films for providing peel-off lids for containers comprising a first film set of films, with a film layer of aluminum, an external polythene film and an internal orientated plastic film; a second film set heat-sealed to the edge of a container to be closed, with a pre-perforated polyester film coupled, by an adhesive, to a non-perforated polythene film heat-sealed to the edge of the container; and a hot-extruded polythene layer interposed between the two film sets to couple the last polyester film of the first film set and the first polyester film of the second film set.

Abstract: The method entails unwinding portion of film stored in roll form. The film is made of a heat-sealable single- or multilayer flexible material. The flaps for the unwound portion are folded until they are side by side or overlapped along a narrow band. The resulting new lateral edges are folded further so as to form longitudinal accordion-like portions and the bottom is then formed with a transverse heat-sealed portion which is produced simultaneously with a median cut relative to the heat-sealed portion, successively separating two pairs of adjacent containers. The heat-sealed bottom is inserted into the container by an extent which is equal to half the width of the lateral accordion-like portion and a longitudinal heat-sealed portion is then produced in the region where the flaps lie side by side and/or overlap, blocking the bottom and the accordion-like portion, simultaneously with a complete or partial cutting of the longitudinal heat-sealed portion.

Abstract: A flexible container of the pouch type, made of material in film form, derived from a contoured tubular body formed by a film with longitudinal and transverse heat-seals of the two ends. The longitudinal heat-seal forms the edge of a longitudinal wing that is folded against the corresponding wall. A portion of the wing is joined to a corresponding portion of the wall with low-tack adhesive so as to surround a region preset to form a hole for access to the container, the first lifting of the wing opening the hole and the container, and the low-tack adhesive ensuring successive repeated opening and closure actions.

Abstract: A flexible container of the pouch type made of a film material, of the type derived from a shaped tubular body formed by a film with a longitudinal heat-seal and by transverse heat-seals of the two ends. At least one corner region of the container has a tear notch that produces, by pulling, the tearing of a portion of the film that comprises a part of the transverse heat-seal and a part of the tubular wall, freeing a corresponding flap of wall that is provided at least partially internally with low-stickiness adhesive protected by a removable film. The flap can be folded back onto the remaining portion of the container so as to close it by temporary sticking.

Abstract: A sheet composed of multiple films for providing peel-off lids for containers comprising a first film set of films, with a film layer of aluminum, an external polythene film and an internal orientated plastic film; a second film set heat-sealed to the edge of a container to be closed, with a pre-perforated polyester film coupled, by an adhesive, to a non-perforated polythene film heat-sealed to the edge of the container; and a hot-extruded polythene layer interposed between the two film sets to couple the last polyester film of the first film set and the first polyester film of the second film set.

Abstract: A method for manufacturing tube-shaped packages (16) made of flexible material, characterized in that an annular portion (20) is pushed inward in a U-shaped arrangement at at least one closed end (17) of a tube-shaped package, said annular portion being at least partially heat-sealed to the remaining part of the package at facing portions thereof. An apparatus for carrying out the method. A package obtained with the method and the apparatus.

Abstract: A method for manufacturing tube-shaped packages made of flexible material, characterized in that an annular portion is pushed inward in a U-shaped arrangement at at least one closed end of a tube-shaped package, said annular portion being at least partially heat-sealed to the remaining part of the package at facing portions thereof. An apparatus for carrying out the method. A package obtained with the method and the apparatus.

Abstract: An apparatus for forming containers with reinforced edges, comprising: a roll for feeding a flexible film; a forming collar upstream of a first tube around which the film is wrapped; a device for heat-sealing the longitudinal flaps of the film wrapped around the tube so as to form an enclosure, wherein the first tube tapers into a second tube and at the tapering region there is provided at least one insertion element which acts at right angles to the surface of the film, so as to form at least one rib which is directed toward the inside of the enclosure, and further comprising a sealing device for at least partially heat-sealing the at least one rib.

Abstract: A container for liquids or fluid products, including viscous ones, made by folding and heat-sealing a single sheet of flexible material. The single sheet is folded so as to form two mutually opposite quadrangular faces directly heat-sealed along two consecutive sides, while the third side of each one of the two faces is connected by an accordion-like portion which forms a substantially triangular base for the container and a fourth side has an additional accordion-like portion which forms a closure wall. The container has a filling opening on one of the two first sides or on the corner where they converge.

Abstract: A method for obtaining dimensionally and structurally stable objects, in particular disposable containers, from a flexible film rewindable on a reel, comprising the steps of preparing a flexible film rewindable on a reel, which, at least in those regions which in the obtained object are required to be substantially rigid, is associated with a structurally transformable substance inert with respect to the film and at least one passive activator therefor, forming an object from the film prepared in this manner, and during any one stage in a formation of the object, administering an energy compatible with the activator to start a structural transformation reaction of the substance and convert the regions from flexible to substantially rigid.