NL8402706A - HOLDER WITH WELDABLE AND BREAKABLE LID. - Google Patents

Description

* * JJS / WP / ag CURVES. PACKAGING B.V. te Ede Inventor: Cornelis van Raaite at Dodewaard, -1- PN 3570

HOLDER WITH WELDABLE AND BREAKABLE LID

The invention relates to a container with lid, both made of plastic, which container can be hermetically closed by arranging a weld between two mating flanges of the container, respectively. the lid and which container can then be opened by breaking a wall thinning in the container flange.

Such a holder and lid is known from British patent application No. 2009704.

A drawback of this known container and lid is that due to the horizontal flanges protruding outside the container, a lot of space is required when packing these containers in filled or unfilled condition. Another drawback is that the protruding horizontal flanges are sensitive to impacts in the vertical, especially upward direction, as a result of which an unintentional breaking of at least part of the wall thinning can occur and therefore no hermetic sealing is involved. Another drawback of the said container and lid combination is that although after breaking the lid and container and lifting the lid, the lid can be clamped on the container again, the combination with only the clamping closure, under certain circumstances less reliable is. This is due to the fact that the clamping closure rests entirely on the friction between a recessed part of the lid and the inner wall of the container. In the event of a filled container being tilted or falling over, the force exerted by the contents of a filled container on the inside of the lid can become greater than the frictional force between the lid and the container, whereby the lid is pressed off the container.

The object of the invention is to provide a holder and lid while avoiding the above drawbacks.

8402706 ¥ r * \ -2-

This is obtained in that the holder flange consists of a substantially vertical auxiliary wall, which is located at some distance from the holder and externally around the holder, which extends over some height in the upper region of the holder and which has a bridge wall all around the holder wall. is connected, wherein the auxiliary wall below the transition with the bridge wall has a wall thinner and because the flange wall of the lid is formed by an apron of a cover lid, which apron encloses the auxiliary wall when the container is closed and extends further than the wall thinner such that below the wall thinner two flanged portions of the holder, which are situated against each other, respectively. there is a cover between which a weld can be placed.

If the lid has been removed from the container after breaking the wall thinner in such a container with lid, it can be reapplied to the container, the container flange part now forming part 15 of the lid, originally below the wall thinner, under the still standing part of the holder flange. As a result, a good grip of the lid on the container can still be obtained after the wall thinning has been broken, as a result of which the weld becomes ineffective as a fastening means of the lid on the container. Furthermore, the vertical position of the flanges saves space and the wall thinning is less susceptible to breaking under up or down forces exerted on the lid.

In the absence of a weld between holder and lid 25, a good fastening of the lid on the holder can also be obtained by arranging a groove on the outside of the auxiliary wall above the wall thinner, in which, when the container is closed, a circumference around the inside of the cover flange mounted continuous or discontinuous rib is engaged, or by converting the free end of the cover flange inwardly so that it engages under the auxiliary wall when the container is closed.

A preferred variant of the invention is that in which the wall thinner is located on the inside of the auxiliary wall and in which the inside of the cover flange wall is provided with a continuous or discontinuous rib arranged all around, which in a closed 8402706% -3 container engages with the top wall of a groove present on the outside of the container flange wall due to the wall thinning. This variant has the advantage that without additional grooves a good fastening of the lid on the container is possible under all circumstances.

The auxiliary wall can be connected to the container wall at its top edge by means of the bridge wall. The risk of dirt formation between the auxiliary wall and the container wall is then eliminated.

An advantageous arrangement is where the bridge wall is located between the top edges of the auxiliary wall and the container wall. As a result, a reinforcement of the mouth edge of the container is achieved.

It is particularly advantageous if the lid is in direct contact with the mouth edge with a closed container. The wall thinning in the auxiliary wall is then sufficiently prevented from breaking when vertical downward forces are exerted on the lid. This embodiment offers a great advantage, especially with stacked containers.

Advantageously, the groove necessary for the wall thinner to be present is only provided after the container has been formed. For example, an injection molded container can be provided with a groove effecting a wall thinning by cutting or milling. Applying the groove later, for example, to the user / filler has the advantage that the auxiliary wall is less vulnerable during the route from injection molding to the user / filler. The user / filler can make the groove before filling, after filling and after pressing the lid. In the latter case, possibly at the same time as applying the weld. • A groove is formed after the cover has been placed on the holder, preferably in those embodiments in which the wall thinning is located on the outside of the auxiliary wall.

The weld can be obtained by gluing or heat-sealing.

The container and lid can be designed in a horizontal cross-section, round, oval, triangular or rectangular.

The invention will be explained in more detail with reference to some exemplary embodiments shown in the drawing.

8402706 4 η »-4- Ιη is the drawing

Fig. 1 shows a side view of a container with lid according to the invention, the left half of which represents an axial section, and FIG. 2-4 side views of some variants according to the invention, of which axial sections are shown on a larger scale of the dotted section I in fig. 1.

In the figures, the same reference numbers have been used for the same parts as much as possible. The container indicated by 1 has a bottom 2 and a side wall 3. A substantially vertical auxiliary wall 4 is connected to the container wall 3 by means of a bridge wall 5. In the auxiliary wall there is a thinner 7 under the transition 6 from auxiliary wall 4 to bridge wall 5. The lid, generally indicated by 8, has a hanging apron 9 which extends around the auxiliary wall 4 and extends beyond the wall thinner. A weld 13 is arranged between the flange part 10 of the cover and the flange part 11 of the auxiliary wall.

After the wall thinner 7 has been broken, whereby the flange part 11 becomes part of the lid, the lid can be lifted from the container. When the lid is reattached to the holder, the part 11 engages under the stationary part of the auxiliary wall 4.

The embodiment of FIG. 2 has a bridge wall 5 between the top edges 14 and 15 of the auxiliary wall 4 and the container wall 3, respectively.

The operation is the same as in Fig. I described.

In order to obtain a good fastening even with a lid that is not welded to the holder, the free end of the lid apron can be provided with an inwardly directed gripping flange, which grips under the auxiliary wall. At the choice of the user, a weld may or may not be used.

The inwardly facing flange is shown in FIG. 2 indicated by dotted line 16.

The variant according to Fig. 3 shows an auxiliary wall 4 in which a wall thinner 17 is arranged by an outwardly staggered arrangement of the part 11 of the auxiliary wall. After breaking the 8402706 I i c

Ss- * -5- thinning 17, the part 11 can grip under the standing upper part 12 of the auxiliary wall.

The variant according to Fig. 4 shows an auxiliary wall 4 with a groove 18 arranged around the auxiliary wall on its outer side, in which 5 can engage a rib 19 which runs around the inner side of the cover flange 9.

Fig. 5 shows a variant in which the wall thinner 20 is located on the inside of the auxiliary wall 4. The groove 21 present on the outside of the auxiliary wall 4 has an annular top surface 22 in which the rib 23 situated around the inside of the cover flange 9 abuts.

The radial partitions 24 as shown in FIG.

1-5, increase the stiffness of the auxiliary wall above the wall support.

This is advantageous because this part of the auxiliary wall can resist the forces accompanying the breaking, thereby facilitating breaking.

Lid and container are shaped to be injection molded using simple, in-line, moldable and openable molds.

The lid and container can be manufactured from the same or from different injection-moldable plastics, such as polyethylene, polypropylene, copolymers of ethylene and propylene or mixtures of these (co) polymers.

8402706

Claims (10)

1. Container with lid, both made of plastic material, which container can be hermetically closed by arranging a weld between two mating flanges of the container resp. the lid and which container can then be opened by breaking a wall thinner located in the container flange, characterized in that the container flange consists of a substantially vertical spaced apart from the container and externally around the container auxiliary wall, which extends over some height in the upper region of the container and which is connected to the container wall with a bridge wall all around, that the auxiliary wall below the transition with the bridge wall has a wall thinning and that the flange wall of the lid is formed by an apron of a cover lid, which apron encloses the auxiliary wall when the container is closed and extends further than the wall dilution such that below the wall dilution 15 two flange portions of the container, respectively, are situated against each other. there is a cover between which a weld can be placed. Container with lid according to claim 1, characterized in that the auxiliary wall is connected to the container wall at its top edge by means of the bridge wall. Container with lid according to claim 2, characterized in that the bridge wall is located between the top edges of the auxiliary wall and the container wall. 4. Container with lid according to any one of claims 1-3, characterized in that the inside of the lid flange is provided with a continuous or discontinuous rib arranged all around, which, when the container is closed, engages with a groove located above the wall thinner around the outside of the auxiliary wall. 5. Container with lid according to any one of claims 1-4, characterized in that the free end of the lid flange is turned inwards and engages the underside of the auxiliary wall when the container is closed. 8402706 -7- A 6. Container with lid according to any one of the claims 1-5, characterized in that the wall thinning is located on the inside of the auxiliary wall and in that the top wall of the groove opposite the wall thinning forms on the outside of the auxiliary wall an engagement surface 5 under which when the container is closed, a continuous or discontinuous rib arranged around the inside of the cover flange engages. 7. Container with lid according to any one of the preceding claims 1-6, characterized in that with a closed container the lid is in direct contact with the mouth edge of the container. 8. Container with lid according to any one of claims 1-7, characterized in that radial partitions are located above the wall thinning between the auxiliary wall and the container wall. 9. Method for the manufacture of a container according to any one of claims 1-8, characterized in that a container without wall thinner is first manufactured and subsequently a wall thinner is effected. 10. Holder with lid as substantially described and / or drawn and / or explained with reference to the drawing. 8402706