CONTAINER HAVING A LOOSE INNER LINING

Abstract: A circular container of a resiliently deformable plastics material, e.g. for storage and transport of paint, solvents and the like, has a side wall (1) which at its top extend above an external container flange (4) with wall portions (2' and 2''). The wall portions (2', 2'') are separated by a folding and bending arrangement (6) which allows an outward and downward bending of the wall portion (2''). A loose insert bag (5) of propylene, PET or similar plastics material is mounted in the container to protect the inside of the container against the contents of the container and is secured to the side wall by folding it around the wall portion (2'') and maintained thereto by the ring tension generated in said wall portion and in the upper portion (7) of the bag and through the abutment of the free edge of the wall portion (2'') on the upper edge of the flange (4), when the portion (2'') is bended outwards and downwards.

Description: Container having a loose inner lining The invention relates to an circular container of a resiliently deformable plastics material, e.g. for storage and transport of paint, solvents or the like. Such containers are well known in particular in the form of 5 or 10-liter containers, optionally stackable containers or pots which close to their upper circumference may be provided with an external flange of the same material as the container and moulded in one piece with the container to tightly secure a removable lid which is also made from resiliently deformable plastics, the lid being constructed with a corresponding flange arrangement which engages with the flange of the container, cf. e.g. DK-C-145,194. The ever increasing environmental considerations shown especially in the industrialized countries have in several countries, e.g. Germany, now resulted in statutory provisions stipulating that containers of the above mentioned type is to be returned to the supplier after terminated use for optional recircling or controlled destruction. However, as residues of paint or solvent contained in such containers may constitute a risk for the members of the staff which are to handle the returned containers, the container should be provided with a disposable insert, e.g. a bag of propylene, PET (polyethylene terephthalate) or similar plastics material having barrier properties to protect the internal container wall against the influences of the contents or deposits of the contents of the container so as to allow the bag with optional residues of the contents to be removed from the container for separate destruction before the container is returned as empty packing to the supplier. Up to now such insert bags have been placed in the container prior to filling of the container, the rim of the bag being folded around the upper upright portion of the side wall of the container and the resilient lid ("flex-lid") subsequently being pressed down over the edge and over the container flange to close the container. When the lid is subsequently removed for use of the contents in the container it simultaneously tends to push the upper edge of the insert bag free of the container rim which results in drawbacks such as the insert bag sliding down into the contents in the container and consequently not protecting the internal container wall sufficiently, or in difficulties in "fishing" the bag out of the contents and resecuring it to the upper portion of the side wall, when only part of the contents has been used and the container has been closed temporarily until further use of the contents. Therefore, it is the object of the invention to provide a container of the above mentioned type having an insert bag therein and which remedies the above drawbacks by permanently securing the insert bag to the upper edge of the side wall substantially independently of whether a lid is on the container or not. The object is obtained by means of a container which is characterized by the features as defined in the characterizing part of claim 1. Moreover, the container may be further characterized by the features as defined in claims 2 and 3. The invention will be explained in further detail below with reference to the drawings which without limiting the scope of the invention illustrates e.g. an embodiment of the invention and wherein Fig. 1 shows a perspective view of a circular container or a pot for paint and the like, Fig. 2 shows a sectional view of the upper portion of the side wall of the container and an inserted bag prior to its folding around the upper portion of the container wall, Fig. 3 shows a sectional view of the side wall with the inserted bag folded around the upper portion of the wall, Fig. 4 shows the same as Fig. 3 but after bending the upper portion of the container wall with the inserted bag, and Fig. 5 shows a sectional view corresponding to the one shown in Fig 3 and with a container lid secured to the container. Fig. 1 shows a circular, stackable container having a vertical side wall 1 which on its outside at the top is provided with a container flange 4 to be used in connection with a container lid, cf. below, and with a cut-out 3 in the side wall 1 to increase the resiliency in the upper portion of the side wall. The upper portion of the side wall above the flange 4 is designated as 2. As will appear from Figs. 2-4, this upper portion is divided into two further wall portions 2' and 2" by a folding and bending arrangement 6 in a radial plane of the container. An insert bag 5 is inserted into the container as will appear from Fig. 2, the upper portion 7 of the vertical side wall of the insert bag being somewhat longer than the corresponding container side wall 1,2. Fig. 3 shows the bag 5 with its upper portion 7 folded around the upper portion 2" of the container side wall prior to the bending of the latter around the bending arrangement 6, and Fig. 4 shows the side wall with the inserted bag after the portion 2" has been bended outwards and downwards so that the now downwards turning edge 2" abuts on the upper edge of the flange 4 and forms an angle with the portion 2' so that the position of the portion 2" produces a ring tension along the outer edge of said portion to secure the bag portion 7 thereto due to a corresponding ring tension being provided in the bag portion 7. The outward and downward bending of the wall portion 2" is facilitated by the extra resiliency contributed to the container wall 1 by means of the cut-out 3. The cut-out also facilitates the return of the wall portion 2" to an upright position when removing the insert bag 5. Fig. 5 shows how a container lid 8 known per se ("flex lid") is placed on the container in which an insert bag 5 is placed and secured. Along its periphery the lid 8 is provided with a flange arrangement consisting of an inner flange 10, a rim portion 12 and an outer flange or a lid flange 9. The latter has a thin-walled part or a bending arrangement 14 with an appertaining locking rip which, when placed to engage under the downward-turning edge of the container flange 4, forms a tight closure between the lid and the container. The internal flange 10 of the lid extends downwards together with a guide rib 11 which abuts on the portion now constituting the upper end of the wall portion 2" when the container is closed with the lid 8, thereby maintaining the portion 2" in its bended position, and together with the ring tension in the portion 2" and the abutment of the latter on the flange 4 contributing to secure the insert bag 5 and due to the direct abutment furthermore forming an extra sealing between the container and the lid.

Claims: P a t e n t C l a i m s 1. A circular container of a resiliently, deformable plastics material, e.g. for paint, solvents and the like, and which during use has an inner lining in the form of a bag (5) of propylene, PET or similar plastics material having barrier properties to protect the plastic container proper against the influences from its contents, the container close to its upper circumference being provided on its outside with a flange (4) of the same material as that of the container and moulded in one piece with the latter so as to secure a resiliently, deformable plastic lid to the container, c h a r a c t e r i z e d in that the portion (2) of the side wall (1) of the container protruding above and beyond the flange (4) is divided into two portions (2' and 2 " ) by a folding and bending arrangement (6), the portion (2') forming an unbroken extension of the side wall (1) of the container, whereas the portion (2") may be bended outwards and downwards towards the upper edge of the flange (4) due to the bending arrangement to abut on the upper edge of the flange, at its top the side wall of the container is provided with a cut-out (3) which ensures a sufficient extra resiliency of the container wall to allow an outward and downward bending of the side wall portion (2"), and the bag-formed insert (5) has a sufficient length in relation to the side wall (1) of the container to allow the upper portion (7) of the bag to be folded around the side wall portion (2") when in an upright position and subsequently to be bended outwards and downwards together with the portion (2") towards the edge of the flange 4, thereby causing the ring tension in the portion 2" and in the bag portion (7) formed by the bending of the portion 2" to contribute in securing the bag portion around the wall portion (2"). 2. A container according to claim 2, c h a r a c t e r i z e d in that the height of the wall portions (2' and 2 " ) and the width of the upper edge of the flange (4) have such mutual dimensions that through its downwards bending the free edge of the wall portion (2") is caused to abut on the outer portion of the upper edge of the flange (4) so that the forces resulting from the ring tension in 5 the downward-bended wall portion (2") contribute to secure the bag portion (7) around the wall portion (2"). 3. A container according to claim 1, in which the lid (8) along its outer periphery is provided with a downward-turning lid flange ° (9) having an inward-directed circular locking rib (13) which in the mounted position of the lid engages under the downward-turning edge of the container flange (4) and which may be bent to be mounted or to be released, respectively, from the flange (4) due to a thin-walled part (14), c h a r a c t e r i z e d in that the lid has an inner flange portion (10) provided with a downward-turning guide rib (11) to keep the container wall portion (2") in its downwards bent position when the lid is mounted and to further ensure that the bag portion (7) is maintained on the wall portion (2") in said position.

Inventors: THORSOE HOLGER, THORSOE, HOLGER
Applicants: SUPERFOS EMBALLAGE AS, SUPERFOS EMBALLAGE A/S
Application year: 1992
Main classification: B65D25
IPC codes: B44D3, B65D25