Abstract: A method of producing a polymer composition adapted to be added to a sealed volume to increase the durability of goods contained in said volume comprising treating a polyamide or copolyamide with a metal compound contained in a volatile solvent composition during refluxing conditions to obtain an active component having capacity to consume oxygen, the metal of said compound being iron, nickel, cobalt, copper or manganese, said active component being a metal complex.

Abstract: A polymer composition for manufacturing containers, intermediate forms or parts thereof for improving their oxygen barrier properties is described. According to the invention the composition contains as an active component a metal compound having capacity to scavenge oxygen and consisting of a metal ion having complexing properties and a polymer to which the metal ion is combined as a complex.A method of producing said polymer composition is also described, according to which a polymer is treated with a metal compound dissolved or slurried in a volatile solvent composition during refluxing conditions for obtaining the active component having capacity to scavenge oxygen. The polymer composition in admixture with a further polymer can be molded into containers, intermediate forms or parts thereof.

Abstract: A method and apparatus for producing a sealed and filled container in which a preform of crystallizable plastic material having a body, a closed bottom portion and an open mouth portion is filled with the goods to be sealed therein whereafter a mechanical forming and thermocrystallizing tool is applied against the closed bottom of the preform, with pressure, to reshape the bottom of the preform by displacing at least a portion of the bottom of the preform inwardly of the body towards the open mouth of the preform. The tool is heated so that the temperature of the bottom portion is greater than the glass transition temperature (Tg) of the plastic material and the tool is maintained in contact with the bottom portion during its reshaping for a length of time sufficient for the plastic material to obtain a total crystallization of at least 15%. The open mouth portion is sealed to produce a sealed and filled container.

Abstract: A container comprising a lid and a container body with a flange, the lid and the flange being fixed to one another in an originally sealed condition of the container to provide a tight closure of the container by a frame-like connection member which has first and second attachment sections affixed to the flange and to the lid respectively. A weakening zone is disposed between the two attachment sections in addition to a downwardly projecting flange. When the container is resealed the outer surface of the flange sealingly abuts against the inner surface of the wall of the container at its mouth. The walls of the container, lid and connection member can be provided with layers of high-barrier material.

Abstract: A container comprising a body (1) with a lid (2) initially sealingly engaged on the body. The lid is removable from the body to open the container and is replaceable to close the container. The body has a mouth with a strip (10) of annular extent secured to the lid, the body being provided with an annular weakening zone (6) or notch (7) in the vicinity of the strip where the mouth of the container is secured to the lid. The container is separable at the weakening zone to separate a part of the mouth and the lid together with the strip from the body, the weakening zone being positioned radially inwards of the strip and upon rupture of the weakening zone forming a locating surface for replacement of the lid on the body. Upon reclosure of the lid on the body, the locating surface engages a cooperating part (25) to hold the lid securely on the body such as by snap-engagement.

Abstract: A container (4) has a closure (15) which consists of a flange (6) and a lid (1) which are joined together all the way round by a failure zone (2). When the container is originally sealed the closure is inserted into the opening and the flange is fixed to a flanged top surface (5) of the container which surrounds the opening. The failure zone is located at the point at which the internal surface (3) of the opening meets the top surface of the opening. The lid is dished inwards within the failure zone in such a way that the outer edge of the dishing (7) forms a guide (10) with the internal surface (3). A surface (8) of the lid extending parallel with the top surface is connected to the guide (10). The lid is broken open and is torn along the length of the failure zone by a locally applied force. The application of force inwards will as a rule move the lid over the distance a until the surface (8) makes contact with a ledge (11) located inside the container (4).

Abstract: A container (4) has a closure (15) which consists of a fastener (6) and a lid (1) which are joined together all the way round by a failure zone (2). When the container is originally sealed the closure is inserted into the opening and the fastener is fixed to a flanged top surface (5) which surrounds the opening. The failure zone is located at the point at which the internal surface (3) of the opening meets the top surface of the opening. The lid is dished inwards within the failure zone in such a way that the outer edge of the dishing (7) forms a guide (10) against the internal surface (3). A surface (8) of the lid running parallel with the top surface is connected to the guide (10). The lid is broken open and is torn along the length of the failure zone by a locally applied force. The application of force inwards will as a rule move the lid over the distance a until the surface (8) makes contact with a ledge (11) located inside the container (4).

Abstract: A container and lid combination in which the lid is removable from the container to open the container and it is replaceable to close the container. The container has a body with a mouth including a strip of annular extent secured to the lid. The body has an annular weakening notch in the vicinity of the strip and the container is separable at the notch to separate a part of the container mouth and the lid together with the strip from the body of the container. The notch is positioned radially inwards of the strip and upon rupture of the notch separate parts are formed which can be reengaged upon replacement of the lid on the container. Locating surfaces are provided on the lid and container for establishing a determined oriented position of replacement of the lid on the body of the container.

Abstract: A container and lid combination in which the lid is removable from the container to open the container and it is replaceable to close the container. The container has a body with a mouth including a strip of annular extent secured to the lid. The body has an annular weakening notch in the vicinity of the strip and the container is separable at the notch to separate a part of the container mouth and the lid together with the strip from the body of the container. The notch is positioned radially inwards of the strip and upon rupture of the notch separate parts are formed which can be reengaged upon replacement of the lid on the container. Locating surfaces are provided on the lid and container for establishing a determined oriented position of replacement of the lid on the body of the container.