DE1254063B - Closure of a container made of plastic by means of a lid that is also made of plastic - Google Patents

Description

FEDERAL REPUBLIC OF GERMANY

Int. Cl .:

B 65 d-55/08

GERMAN

PATENT OFFICE

PATENT LETTERING

German class: 81 c -12

Number:

File number:

Registration date:

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Issue date:

Patent specification

P 12 54 063.5-27 (R 37855)
.8th. May 1964
November 9, 1967
April 27, 1972

The invention relates to the closure of a container made of flexible, elastic plastic by means of a cover also made of plastic. Container with deformable flexible Wall are particularly suitable for receiving powdery or granular goods, are light manufacturable and unbreakable and, since their production price is low, after removal of the Contents are thrown away. In known containers of this type, one is on the container neck externally protruding ring shoulder is provided, under which an annular rib engages when the cover is on, which on the inside of an apron rim provided on the lid and overlapping the container mouth ;: sits. A second inner skirt edge engages in the container mouth at the same time. To the Removal of filling material from the container must also be removed from the known designs pliable building material existing lid can be removed from the container, because the lid has no ao special removal openings. Therefore, the lid is also purposefully designed so that it is on Edge can be grasped and peeled off to the outside.

Furthermore, screw or twist locks on containers are known in which, after application a lock becomes effective, which makes it impossible to remove the closure without destroying it power.

In contrast, the invention is based on the object of a container with a deformable, flexible Wall on the one hand a plastic lid, by pressing in the direction of the opening of the container easy to apply, on the other hand while maintaining an airtight seal of the container to make it impossible to separate the lid and container (without using force), so that a unauthorized refilling of the container is excluded. A closure of the type described is in particular also advantageous if the filling process and the closing of the filled lid are carried out by machine should take place. The solution to the described problem is not easy in that the container must be allowed to squeeze slightly during the removal process, without the insolubility of the attached Lid may be affected.

The object is achieved according to the invention by using a plurality of features, some of which are known per se, in combination. According to this, the lid consists of a stiff, ie less flexible material than the container, and the annular shoulder provided on the container is roughly in the form of a stretched closure of a plastic one made of plastic by a step-like, vertical section
Container by means of a likewise made of plastic
existing lid

Patented for:

Dart Industries Inc.,

Los Angeles, Calif; (V. St. A.)

Representative:

Dipl.-Ing. K. Lengner, patent attorney,

2000 Hamburg 26, Jordanstr. 7th

Named as inventor:

Paul Adam Marchant, Kansas City, Mon.,

Bucket Henry Balkema, Sparta, N. J. (V. St. A.)

Claimed priority:

V. St. v. America May 31, 1963 (284 407) - -

th S having enlargement or diameter enlargement of the container neck formed, which over its entire length a constant, essentially has a wall thickness corresponding to the thickness of the rest of the container wall; the annular gap between the edge of the apron of the lid is narrower at its narrowest point than the undeformed ring shoulder.

With such a closure, the rigid, little elastic plastic existing lid easily brought into its closed position, but not again be removed from the container by bending up its edge. When inserting the relatively elastic Container neck in the gap of the lid made of rigid plastic experiences the mentioned S-shaped expansion of the container neck under the influence of the effective during the closing process and of Forces exerted on the apron edges of the lid stretch and can therefore be moved by the rclath tight, between the annular rib on the outer lid apron and the outer surface of the inner apron Squeeze the gap that is not expandable. As soon as this is done, the springs S-shaped extension back to its initial one

209 618 375

Form in which it fully engages behind the ring rib and is securely held by it.

In this way it is achieved that the cover is easily moved into its closed position, but out of this food cannot be removed again, even if the container is squeezed when the contents are removed will.

The container is expediently designed so that its neck extends in the direction of the container mouth up to the diameter of the annular gap between the apron edges of the lid tapers conically. This makes it easier to attach the lid to the container, in particular when if, according to a further feature of the invention, the skirt edges of the lid at their each other facing inner sides have downwardly diverging sloping surfaces which, when the lid is placed on the container, act as guide and centering surfaces with the mouth end of the container cooperate.

Further details of the invention can be found in the following description of two in the drawing illustrated embodiments of the new container.

F i g. Fig. 1 shows, in side view and partially in section, one with a closure member according to the invention equipped container;

F i g. Figure 2 shows one half of the container in plan; in the ,

F i g. 3, 4 and 5 are sections along line 3-3 of FIG. 3 on a larger scale. 2 illustrates that the cooperating locking members of the container and the closure member in three at Positioning of the closure member show positions traversed one after the other;

Figures 6 and 7 show in successive positions the latch members of the container and the closure member in a modification of the invention.

As the F i g. 1 to 5 show is a bottle-like shaped containers, provided with a lid or with a closure cap 12.

The container 11 consists of one piece and is blow molded from a suitable, tough, but Made of flexible, elastic plastic that behaves neutrally towards the contents of the container. Of course, the container 11 can also be formed by means of another molding process, e.g. B. by way of Injection molding, be made; however, blow molding is preferred because it is cheaper and too good leads to useful results. The container is expediently made of polyethylene, polypropylene, polyvinyl chloride or a corresponding material with similar properties.

The processing of polyethylene by blow molding is known and technically largely developed. The wall of the container is essentially the same everywhere. However, the wall thickness is slightly thicker at the points where the container diameter is reduced. The side wall 13 rises from the container bottom 14 and ends in a neck section 15 which forms the mouth opening

16 surrounds.

This neck portion 15 is illustrated in FIGS. 3 to 5 on a larger scale. The top end

17 of the side wall 13 tapers inward and forms an angle with the longitudinal axis of the container from about 10 to 40 °, and expediently from about 20 °, as shown in the drawing. To this Way an outer conical surface 18 is created, which extends in the direction of the container mouth rejuvenates.

At the upper end of the wall section 17, the container wall is again bent sharply outwards, so that they make an angle of about 20 to 40 ° with the horizontal, and that is practical, as shown, from 30 °, includes; she forms here

ίο a relatively short ring section 19. This Ring section forms an outwardly sloping shoulder, which then points in the opposite direction is and merges into an obliquely inwardly extending elongated edge 21 which is approximately parallel to the wall section 17 runs. Opposite the vertical is the edge 21 and primarily his Outer surface 22 at an angle of about 10 to 40 °, expediently of 30 °, inclined.

The outer ring surface 22 of the rim 21 is smooth and conical and abuts on top with the flat ring surface 23 of the container mouth together, appropriately directed perpendicular to the container axis. the annular outer surface 24 of the shoulder 19 extends at the above-mentioned angle and connects the Conical surfaces 18 and 22, in that it merges with roundings 25 and 26 into these surfaces; sharp edges are thereby avoided here.

The conical inner surface 27 of the wall section 17 of the container goes into the inner surface of the ring section 19 also with a rounding 29 over. The conical inner surface 30 of the container rim In contrast, 21 intersects the flat mouth surface 23 in a sharp edge 31.

The sharp edge lies before and after the lid 12 is snapped onto the container 31 and the rounding 29 approximately on a cylindrical surface, the axis of which coincides with the container axis, as shown in FIGS. 3 and 5 can be seen.

The one-piece cover 12, like the container 11, consists of a flexible one Plastic, e.g. B. polyethylene od. Like., However, has a greater wall thickness, so that it is relatively stiff or is rigid. Two ring-shaped, in relatively closely spaced apron-like lugs 33 and 34.

The inner skirt edge 33 is longer than the outer one; it is ring-shaped, at right angles directed to the lid portion and has a smooth cylindrical outer surface 35, which with the Inner surface of the lid portion meets at 36 at a sharp right angle. The lower Edge section 37 is rounded conically inwards.

The outer skirt edge 34 has on the inside a protruding, rounded annular rib 38 to which a downwardly and outwardly conically widening surface 39 is connected, which is flat up to the lower Edge area 41 of this apron edge 34 is sufficient. The diameter of the ring rib on the lid 38 is smaller than the diameter of the container shoulder at point 26.

The wall thickness of the lid 12 in the middle section 32 and in the skirt edges 33 and 34 is substantially larger than that of the container 12. As a result, the skirt edges 33 and 34 become hardly deformed or bent when the lid is placed on the container.

As shown in FIGS. 3 to 5, the container wall belt at the lower end of section 17 has a flat, horizontal ring shoulder 42, which when placed Lid is below the lower edge 41 of the lid apron. The dimensions are like this chosen that the outer surfaces of the container wall and the skirt edge 34 into one another without a step pass over. As can be seen in FIG. 5, the closed container has a smooth, stepless one Outer surface on.

The cover portion 32 has a plurality of Entnahmebzw. Spouts 43, usually by means of an easily removable, pressure-resistant closure strip 44 are covered.

The lid 12 can easily be snapped onto the container II ¹ in such a way that it cannot easily be separated from the container again. The placement of the lid is shown in FIGS. 3 through 5 illustrated.

Like F i g. 3 shows, the inner, longer skirt edge 33 serves as a guide member when the Lid on the container. This process is due to the diverging and therefore annular Mouth-forming apron surfaces 37 and 39 are supported. This is particularly beneficial for the Case of using automatic filling machines where it is necessary to operate economically essential to the rapid implementation of the locking process arrives.

If the lid 12 moves in the longitudinal direction of the container, the edge 31 and the rounded one slide Rib 39 of the container on the outer surface 35 of the inner skirt edge 33 along until the inclined Surfaces 22 and 39 come to rest with one another. The outside diameter of the horizontal Edge surface 23 is appropriately somewhat smaller than that of the annular rib 38 of the cover, so that this both parts do not meet during the axial movement and the placing of the cover does not hinder.

When the lid 12 is pressed further onto the container, it is illustrated in FIG In the intermediate position, the surface 39 of the relatively stiff outer skirt edge 34 has a wedge effect exercise on the container rim at surface 22. This has the consequence that the ring section 19 of the container (seen in FIG. 4) is bent clockwise around the point at which the rib 29 at the outer surface 35 of the inner skirt edge comes to rest. At the same time, the container edge 21 bent counterclockwise, namely around the point at which it is in the ring section 19 transforms. The container rim 21 and the ring portion 19 are thus temporarily deformed as this F i g. 4 shows until the surface 22 has passed the annular rib 38.

During this process, the inner skirt edge 33 hardly bends or deforms, whereas the outer skirt edge 34 around the connection line with the middle cover section 32 slightly outwards is bent up, as exaggerated in FIG. 4 is shown. Both skirt edges 33 and 34 are, however so stiff and the neck portion of the container is so resilient that the skirt edges face each other hardly bend the lid.

Have the individual parts the 'shown in Fig. 5' When the final closed position is reached, the annular shoulder 25 and the edge 21 are finally on the annular rib 38 passed. You now endeavor to restore your tension-free starting position according to FIG. 3 take, but are enclosed by the apron-like edges of the closure member. The roundings 26 and 29 act in frictional connection with the skirt edges of the lid together, above the annular rib 38. As shown in FIG. 5 can be seen, any axial movement of the lid 12 with respect to the container 11 have the consequence that the annular rib 38 of the lid pushes against the underside of the shoulder 19 to pivot it clockwise. This will however, this prevents the marginal edge 31 from pressing against the inner skirt edge 33.

Since the edge surface 41 of the outer skirt edge essentially on the shoulder edge 42 of the container rests and the outer surfaces of the skirt edge and the container at this point in the same Lie flat or have the same diameter, there is no protrusion at this point, dei could lead to the skirt rim 34 being accidentally or unintentionally lifted from the container wall and the annular rib 38 of the shoulder 19 is disengaged.

The flexible, elastic container wall becomes when removed When the filling material is compressed, different forces act on the container neck on the most varied Put. These forces can essentially be divided into two groups.

Some of the forces act roughly in the direction of compression and usually tend to move the neck portion of the container inward (to the right in Fig. 5). this has only as a result that the shoulder 19 counterclockwise to its landing on the seeks to pivot the inner skirt edge 33 and thus more strongly against the outer annular rib 38 sets.

The other forces at right angles to the direction of compression have that Seeking to move the neck portion of the container outward (i.e. to the left in Figure 5). In order to the shoulder 19 is also pressed all the more forcefully against the outer annular rib 38.

In this way, the lid is very effectively and non-detachably connected to the container 11. At' Removal of filling material, the strip 44 is pulled off, so that the filling material through the openings 43 can emerge.

In the F i g. Figures 6 and 7 illustrate a further embodiment of the invention. In this In the case of the flexible, elastic container 51 has around its upper end an obliquely inwardly directed Wall section 52 which is delimited at the bottom by an annular shoulder 53. At the top is the wall section bent outwards and then again obliquely inwards, so that a shoulder 54 and an edge 55 arise, approximately the shoulder 19 and the edge 21 of the previously discussed embodiment correspond. In this case, the cover 56 has two closely spaced apart Apron edges 57 and 58, which are annular at their lower ends, outward and inward, respectively have inclined surfaces 59 and 61. In this case, the outer edge of the apron is the longer one, so that the inclined surface 59 extends further downward in the axial direction than the inclined surface 61.

At the upper end of the inclined surface 59, the

Apron edge 57 has an annular rib 62 which protrudes into the gap between the two apron edges.

The outer surface 63 of the container rim 55 is similar like the inclined surface 59 inclined, so that when they cooperate when the lid is placed on the container, the shoulder 54 is flexed clockwise. Because the inner diameter of the edge 55 is smaller than the outer diameter of the inclined surface 61, the inner peripheral edge 63 is along the Slide along the inclined surface. In this embodiment too, there is therefore a tilting or pivoting movement of shoulder and edge when the lid is put on as a result of the sliding interaction with the two edges of the apron on the lid. The neck portion of the container will strive to fit into the equipment spring back as soon as the container edge 55 past the annular rib 62 into the position shown in FIG. 7 Location. The rounding 60 at the junction of shoulder and edge then acts next to the annular rib 62 with the outer skirt edge together.

At this; Embodiment there is also the additional feature that on the inner skirt edge 58 there is an undercut annular groove 64 where it merges into the cover, which extends into Towards the outer edge of the apron. When the lid is put on, the compressed one snaps Edge 63 of the container opening in this annular groove. Every attempt, the cover 56 in the axial The direction of pulling away from the container 51 is made possible by the interaction of the shoulder 54 with the annular rib 62 as well as through the penetration of the upper edge into the annular groove 64 opposed resistance. When the flexible-elastic container is squeezed, only forces are effective that Strive to have the shoulder 54 and / or the edge of the rim 55 in even more tight engagement with the Bring the apron edges of the lid.

The type of connection illustrated in FIGS. 1 to 7 can also be used to connect the bottom walls To attach the container closed at the top to the side container walls. The removal openings can be provided either in the lid or in the bottom wall of the container in both cases being.

Claims (8)

Patent claims: 1. Closure of a flexible elastic plastic container by means of a also made of plastic lid, in which on the neck of the container one after externally projecting annular shoulder is provided, under which an annular rib when the cover is in place engages, which on the inside of a provided on the lid, overlapping the container mouth outer skirt edge sits, with a second inner skirt edge into the container mouth engages, characterized in that the cover (32) consists of a rigid, i.e. H. fewer flexible material exists as the container (13) that the annular shoulder provided on the container by a step-like, in vertical section approximately the shape of an elongated S having Expansion (19,24) or diameter enlargement of the container neck (15) is formed, which on its entire length a constant, essentially the thickness of the rest of the container wall has a corresponding wall thickness, and that the annular gap between the skirt edges (33, 34) of the lid is narrower at its narrowest point than the undeformed ring shoulder. 2. Container closure according to claim 1, characterized in that the container neck (15) in Direction of the container mouth (31) up to the diameter of the annular gap between the apron edges (33,34) of the lid tapers conically. 3. Container closure according to claim 1, characterized in that the apron edges (33,34) of the lid (12) diverging downward on their inner sides facing one another Have inclined surfaces (37, -39) that act as a guide when the lid is placed on the container and centering surfaces cooperate with the mouth end (22, 23, 31) of the container. 4. Container closure according to claims 1 to 3, characterized in that the on the container neck (15) provided annular shoulder (19,24) on their with the annular rib (38) and the guide surface (39) of the outer skirt edge (34) cooperating outer and also on their with the inner skirt edge (33) cooperating edge (29) is rounded. 5. Container closure according to claims J to 4, characterized in that the inner Apron edge (58) near its attachment point on the cover (56) has an annular groove (64) for receiving the having inner marginal edge (63) of the container mouth. · 6. Container closure according to one of the preceding claims, characterized in that that the container neck (15) having the annular shoulder (19, 24) has one opposite to the rest Container (13) smaller diameter and an annular edge shoulder (42) formed thereby has, for receiving the lower edge (41) of the outer, with the lid attached to the The outer surface of the container wall (13) is flush , running lid skirt edge (34) is used. 7. Container closure according to one of the preceding claims, characterized in that that the ring shoulder (19,24) is perpendicular to the plane to the container axis approximately an angle between 20 and 40 ° (expediently 30 °) and that conically tapering, the mouth opening (31) enclosing the upper end of the container (21) , the container axis approximately forms an angle between 10 and 40 ° (expediently of 30 °). 8. Container according to one of the preceding claims, characterized in that the inner lid skirt edge (33) has a greater axial length than the outer skirt edge (34) and that its inclined guide surface (37) is substantially below that of the lower Edge (41) of the outer skirt edge (34) certain plane lies. Considered publications:
German Patent Nos. 829 248, 1074 995, 594, 1137 642; German utility model No. 1678680,1 721 170, 1769704, 1780504, 1808216, 1847369, 1854306, 859 959, 1,861,882, 1,865,641, 1,872,294;