FR2495111A1 - SEALED CLOSURE COVER FOR CONTAINER - Google Patents

Abstract

Elastically deformable cover with flange 2 extending downwards, provided with an internal annular rib 8 for hooking with a bead 9 of the external wall of the container. Cover characterized in that the flange 2, in the vicinity of the hooking rib 8, is extended by an annular flange or release skirt 13 forming a bi-stable, folding hooking function, from an extended position towards the bottom with the rib 8 engaged under the bead 9 and an extended upward position in which the junction is released. Lid applicable to a watertight closure, easy to open, with the possibility of using the cover for a temporary protective closure. (CF DRAWING IN BOPI)

Description

The present invention relates to a closure cover of

  an elastically deformable plastic container having a downwardly extending lid flange and having an inwardly projecting annular engagement rib for engagement with a peripheral bead or flange provided on the periphery of the container;

  container neck to be sealed.

  Lids of this type are used for sealing various containers. In some cases, for example for paint cans; they are difficult to remove, because effective sealing implies placement with significant prior tension of the material

  of the lid on the container in question.

  The present invention aims to facilitate the removal of sealed lids containers. It relates to an elastically deformable plastic cover of the type described at the beginning, characterized in that the

  flange of the cover which is close to the hooking rib

  ge is extended by a skirt-shaped perimeter flange for disengaging the lid, the assembly constituting in the mounted state a bi-stable snap hook which can be bent from a downward extended position, in which it cooperates with the outside bead of the neck

  from the container to the clamping tension state, to a posi-

  folded upwardly, in which the fastening rib is separated from the bead, or no longer cooperates with it, with a reduced clamping tension. The flange of the cover provided with the rib and the release flange which extends it constitute the articulated elements of a bistable junction device, wherein the cover portion between the rib flange and the lower flange constitutes a connection

  hinge, and the annular tension of the discharge flange-

  acts as a spring which, in a position of flas-

  that, contributes to maintain a firm commitment between the rib and the bead of the container, while in

  the other position, it keeps the rib clear of the stuffer

  let or only in slight contact with him.

  By a simple movement of the fingers along the lower edge of the skirt-shaped release flange, a person holding the container can bring this skirt into a bent position in which the annular tension is at a maximum, thereby flange to go by click in its release position. The lid can then easily be separated from the container, while, in use, it can be replaced without locking for

  temporary protection of the content.

  According to an embodiment of the invention, it is provided on the inner surface of the

  flange cover, an annular housing flaring coni

  down towards the thinner skirt portion

  foldable of this flange, directly above the rib

  inner ring. This provision is particularly

  advantageously in conjunction with covers provided with axial tension, in which the surface of the cover is sealingly applied to the mouth of the neck of the container along a very narrow line of contact, the cover flange is located radially outwardly from the mouth of the container and connected by an acute curve with the actual surface of the cover, without the possibility of transmitting a bending moment to it0 A cover of the type described above is subjected to tension axial result of the fact that the distance between the edge of the mouth of the container and the lower surface of the flange or flange of the container is greater than

  the vertical distance between the closing contact line

  the cover and the snap rib on its

  flaccid when the lid is removed. By placing the

  on the closure flange, an axial tension force is created in the flange of the cover, this tension being greater as the pressure per unit area required for sealing on the contact line between the mouth of the container and the lid is no longer

  great. Since the lid flange is loaded with

  Only by tension axially, the portion forming the junction between the cover flange and the clearance skirt may be provided relatively winc, so that the curvature of the clearance skirt from one of its positions to the other simply requires

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  overcome the maximum peripheral voltage existing on the

clearance skirt.

  In the case where the lids must be closed

  axial tension alone, it is of little importance

  the annular tension is greater in the closed position than in the disengaged position of the

  skirt. For this reason, the clearance skirt can extend

  essentially downward along the wall of the container, which avoids problems when

  several containers must be placed against each other.

  Other types of containers, for example for jams,

  having lateral walls bulging outward

  below the edge of the mouth, may be provided with a cover with clearance skirt having a diameter which, in the closed position of the lid closure, is

  bigger than in its unobstructed position. The annula-

  in this cover skirt is then upper in its sealing position, and this is of particular importance in the types of covers in which the sealing junction between a bead provided on the mouth of the container and the lid is based on a voltage

  previous radial exerted on the lid.

  The invention is described below with reference to the accompanying drawings, in which: Figure 1 is a radial sectional view of an exemplary lid according to the invention; FIG. 2 is a plan view of the lid; FIG. 3 is a sectional view of an embodiment of the container lid according to the invention, and FIG. 4 is a corresponding sectional view of another embodiment of the invention. realization of the container lid according to the invention. The container lid shown in FIGS. 1 to 3 comprises a flat surface 1 and a substantially axial flange-shaped flange 2 which, when in use, extends downwards and which comprises a conical edge portion 3 connecting to a radial plate portion 4, itself connected to the flat surface 1 of the lid, via a flange portion

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  axial interior 5. The lower surface of the portion of

  radial flange 4 is provided with an axially oriented guide rib

  6 and a sharper sealing rib 7 contacting the edge of the mouth of the container along a narrow line of seam. When the container is sealed by

  the cover, an attachment rib 8 on the inside surface

  the flange or flange of the axial cover 2 is engaged with a locking edge extending downwardly at the end of a container flange 9, which extends to

  from the outer wall 10 of the latter.

  Figure 3 shows, in phantom, the position of the conical edge portion 3 of the lid when it is placed without locking on the container. In this position,

  the vertical distance between the edge of the mouth of the

  to the locking edge extending downwardly from the flange 9 of the container, is greater than the vertical distance between the sealing rib 7 and the top of the rib

  hooking 8 of the lid. When the lid is applied

  In a sealed manner on the container, the conical edge portion 3 is pressed downward, as shown in solid lines in FIG. 3, under the effect of an axial pressure exerted on the lid. The hooking rib 8 then engages by clicking below the locking edge of the flange 9 of the container. The axial flange 2 of the cover is thus subjected to an axial tension, which press tight seal

  the rib 7 of the lid against the mouth of the container.

  Immediately above the hooking rib 8,

  the lid flange 2 is provided with a circular housing

  11. Beyond that, it is connected downwards by a

  12 of a smaller thickness, to a flange or skirt

  13 which extends, in the closed position of the lid,

axially downward.

  When a user of the container wishes to remove the

  he moves his fingers along the lower surface

  of the skirt 13 exerting an upward and upward pressure, which increases the annular tension

  up to a maximum. As a result, the rib of

chage 8 gets off suddenly

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  the flange 9 of the container and the skirt 13 moves

  upward, in the position shown in phantom

  broken. The clearance skirt 13 thus acts as a disc

  bi-stable articulated junction positive, connected to the hinged lid flange 2 along the thinner wall portion 12, and which is held in its extreme position by the annular tension of the flange 2. When the

  clearance 13 is formed in such a way that in its

  seal, it extends in the direction of

  radially, away from the wall of the container, the annular

  the increased weight causes an even stronger commitment to

  rib-hook 8 with the flange 9 of the container.

  Particular advantages are obtained when the

  Closure sealing of the lid on the mouth of the container is achieved by means of a radial tension force of the lid, as is the case for the example

  embodiment shown in Figure 4.

  In this case, the flat surface 1 of the cover is

  directly along an axial flange 14, which is provided, on its inner side, with an annular sealing rib or bead 15, which, in the closed position of the lid, is engaged with a mouthpiece rim 16 provided at the top of the vertical wall 10 thereof. The diameter of the clearance skirt 13 is, as shown,

  in its closed position, greater than in its position

  release. The flange 14 is thus pressed, in the closed position, with its bead 15, around the bead 16 of the mouthpiece, which it however detaches

  when the flange 14 is moved upwards in its po-

  upper section (shown in broken lines). In the disengaged position of the cover, the rib 14 and the bead 16 can remain engaged, but with a lower pressure that allows the cover to be removed by passing the rib over the bead 16, it is not absolutely necessary. necessary to ensure that the sealing rib 7 is completely separated from the container 9 during the removal and replacement of the lid on the container. The correct lid

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  to the invention, with its release skirt bistable attachment junction may be provided with a different shape from that of the examples shown. In particular, it may have a perimeter of regular polygon with rounded angles, adapted to containers of section also polygonal,

  such as cans, food, and the like.

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Claims (5)

-R E V E N D I C A T I 0NS -   1. Closure lid for container, of elastically deformable plastic material having a flange or flange (2) extending downwards, provided with an annular internal snap-hooking rib (8), engaged with a peripheral bead (16) or flange (9) of a container to close, cover characterized in that   that the lid flange (2), in the vicinity of the nerve   latching vane (8) extends into a flange of disengage-   skirt-shaped annular joint (13) which constitutes a bi-stable hooking junction, which is collapsible, from a downwardly extended position, in which the rib (8) engages the bead under tension (16). ) or the flange (9) of the container, to a position extended upwards, in   which rib is disengaged from the bead.   Lid according to Claim 1, characterized   in that in the inner surface of the cover flange   cle (2), above the fastening rib (8), is provided a housing (11) widening cone downwards   to an elastic wall position, thinner, direc- above the rib (8).   Lid according to any of the claims   cations 1 or 2, characterized in that the clearance skirt (13) has, in its closed position, a diameter greater than that in its position of disengagement of the cover.   Lid according to any of the claims   1 or 2, characterized in that the clearance skirt (13) has a shape such that it extends essentially   axially when in its closed position.   Lid according to any of the claims   cations 1 to 4, characterized in that the lid has   a polygonal periphery with rounded corners.