DE8524689U1 - Container with removable lid - Google Patents

Description

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Dipl.-lng. W ₄ Dahlk * |

Dipl.-lng.H.-J ^ Lippert August 27, 1985

Patent Attorneys Ö / Sch

Frankenforster Strasse 137
5060 Bergisch Gladbach 1

Jokey plastic
GnbH & Co. KG
5272 Wipperfürth

"Container old removable lid"

The invention relates to a container with a removable and replaceable lid made of plastic, the beaded edge of which overlaps the bead of the container.

These containers with lids are relatively tight and prevent the leakage of liquid contents Moving or tipping over of the container secured. An absolutely liquid-tight or airtight closure but cannot be guaranteed, especially if several buckets of this type are stacked on top of each other and thereby the middle part of the lid is stressed by the weight of the other containers standing on it.

In some cases, one would also want to erase the consumer also give a guarantee that the contents of the container were not yet accessible to third parties or that the atmospheric air has not come into contact with the contents.

The invention is therefore based on the object of providing such a cover with a removable cover The container has to be closed tightly.

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η This object is achieved according to the invention by a Plastic film sealing the interior of the container ge-1 East j whose outer edge with the container wall on the inside, in the area of the transition to

e Beaded edge, welded airtight and their

Flat middle part, running parallel to the attached lid, also with the largest one coming load of the lid is not damaged.

The container is therefore initially provided with the

Well filled. Then a plastic film is on the placed on the upper edge of the container and welded to it in the specified manner. In the end the lid is put on and. at corresponding-15

corresponding design of the beaded edge, snapped on.

The cover thus protects the film against damage, even if it sags to a certain extent Weight load while the film takes on the task of sealing. One touch of the foil through a lid that is bent under load can be accepted. It just has to be ensured be that at the highest, in question

coming weight load and thus the maximum 25

Deflection of the lid does not tear the film yet. The film will sag to a certain extent can absorb as a result of stretching.

The 30th is particularly easy and reliable

Then the film becomes welded to the container wall

make if this protrudes as a collar over the beaded edge, in which case the film with the upper one Front edge of this bead is welded.

The invention also relates to a device for welding the plastic film in a container

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according to claim 1. This device comprises one Feeding device for the filled containers, a strip-shaped plastic film guided just above the upper edge of the container and one attached over it arranged, vertically movable up and down, heated welding head with an underside protruding preform ring. As soon as the container through the feed device under the welding head was brought, the welding head is lowered, pressing the foil tape against the upper edge of the Container wall and welds the film to the upper front edge of the container collar. Then will the film part closing the container opening detached from the surrounding band and the

Container removed.

After a new container has been fed in and the film strip has been moved forward accordingly, the film strip can then the next weld can be made.

20th

The detachment of the firmly welded film part from the surrounding film strip can take place in any way. For this purpose, however, an annular cutting knife that can be rotated and raised and lowered is preferably provided outside the preform ring of the welding head, concentric to ( ) 25 this preform ring.

To the device for containers of different To be able to use shape and size, the preform ring is designed and arranged to be exchangeable.

The invention is explained in more detail below with reference to the drawing in exemplary embodiments. Included demonstrate:

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Fig. 1 is a partially broken away side view a container according to the invention with a lid;

Fig. 2 is an enlarged view of the in Fig. 1 of a sectioned part; FIG. 3 shows a representation as in FIG. 2

modified container with lid;
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4 shows a schematic representation of a device according to the invention and

Fig. 5 is an enlarged partial representation of the Welding head with preform ring.

The container 1 shown in Figures 1 and 2 has a slightly conical wall 3, the top ends in a collar 5. Just below this collar closes the wall 3 to the outside protruding bead 4.

The container is closed by a plastic film 6 - after it has been filled. The slide extends (Λ 25, as can be seen from the drawing, something into the interior of the container and lies with its outer edge on said bead 5 of the Container on. There the film 6 is welded to the collar 5 along the upper end edge 7 of the collar 5. The weld seam extends seamlessly over the entire circumference of the front edge 7 and causes a airtight closure of the filled container.

On the closed with a foil in this way Finally, a lid 2 is placed on the container,

the one disc-shaped central part 9 and one

radially outwards at this adjoining bead star

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term edge 10 and one of its lower outer end inwardly projecting ring 11 comprises. Of the The middle part 9 of the lid is opposite the bead-like edge 10 somewhat in the container assigned to it;

drawn, but only to the extent that he even at \

its greatest deflection due to external stress, the underlying film 6 does not tear. \

The bead-like edge of the lid lies snugly on the bead 4 of the container. The one protruding inward Ring 11 then snaps, in a per se known> Way, over the bead of the container. -

In the one shown in Figures 1 and 2! The embodiment is on the underside

of the lid, at the point of transition to;

bead-like edge 10, an inwardly protruding ring-like projection 8, which when snapped open of the lid, outside of the collar 5 of the container, on the bead 4 of the container and there a causes additional support.

The inventive design of the container with lid and sealing plastic film can also with such known containers and lids realize in which from the wall 3a of the container la no special collar protrudes upwards, but the edge bead 4a connects directly to the wall 3a. The bead has in its upper part

QQ has an approximately circular cross-section.

The cover 2a lies with its bead-like edge 10a, which also has an et · *. ' circular transverse |

Section has »full on the edge bead 4a of the container and again overlaps with his re-entrant ring 11a the outer lower end of the edge bead 4a of the container.

Before the cover 2a is put on, a plastic film 6a is introduced, which on its outer edge Welded flat to the upper end of the container wall 3a and the adjoining bead 4a is. Under certain circumstances, welding at one point, that is to say along a relatively large area, is sufficient narrow annular surface extending over the circumference of the container wall or the edge bead 4a.

In Fig. 4 is a schematic of the structure of a device for welding the plastic film with the filled Containers shown. The containers stand on a solid base 12 and are through a Transport device 14, which is here in a simplified Way is shown as a band with receiving openings for the container, in the direction of arrow 13 shifted clockwise. Above the container group, at a short distance above the upper edge of the container, a band-shaped plastic film 15 is arranged in the same cycle as that below her standing container is moved in the direction of arrow 20.

Above the aforementioned arrangement there is a heated welding head 16, of which the underside a preform ring 22 protrudes (see Fig. 5).

The welding head is carried by columns 17 and 18 and can be guided by these in the direction of arrow 19 be lowered. As soon as a bucket 1 is in the correct position below the preform ring 22 of the Welding head 16 is located, the welding head is lowered and presses the film strip 15 onto the Collar 5 (see Fig. 2) of the container. The plastic film is welded to the upper one Front edge 7 of the collar 5 of the container.

Outside the preform ring 22 and concentric to it

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a cutting knife is located on the welding head 16 23, which during the welding process the remaining on the container circular part of Plastic film from the surrounding plastic oil tape separates out. This succeeds if the temperature of the welding head is set exactly Do not release it earlier than the clamping and welding of the plastic film the upper edge of the container.

In practice, however, as has already been indicated, one becomes a rotatable and open and Use a retractable ring-shaped cutting knife., which is attached in a corresponding manner to the welding head.

It should be noted that instead of a solid base 12 for the step-by-step Container 1, a conveyor belt carrying these containers can also be used, which is then in must be supported in a corresponding manner.

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Claims (5)

Dipl.-lng. W. Dahlke DipUng.H.-J.üppert ²⁷ ' ^Au ^ ^{sl 1985} Patent Attorneys D / Sch Frankenfcrster Strasse 137
Bergisch Gladbach 1 Jokey plastic
SabH & Co. KG
Hipperfürth Expectations ) 1. Container with removable and replaceable Lid made of plastic, the bead-like edge of which engages over the bead of the container, marked by a plastic film that closes the interior of the container (6), the ^ n outer edge with the container wall (3) on its inside, in the area of the transition to the edge bead (4), is welded airtight and 20 whose flat middle part, running parallel to the attached cover (2), even in the case of the largest, relevant load on the lid is not damaged. () 25 2. Container according to claim 1, characterized characterized in that the container wall (3) as a collar (5) over the edge bead (4) of the container (1) also extends, with whose upper front edge is the plastic film (6). . is welded. 3. Device for welding the plastic film in the case of a container according to claim 1, g e k e η denoted by a feed device (12, 14) for the filled containers (1), a belt-shaped plastic film (15) and guided just above the upper edge of the container 20th 25th 30th 35 ti 1 · · t t I I I I I I II I ■. I) Il t t a heated welding head arranged above it, which can be moved up and down in the vertical direction (16) with a protruding underside Preform ring (22).
5 4. Apparatus according to claim 3, characterized by a rotatable, raised and lowered ring that is arranged outside the preform ring (22) and concentrically therewith ring-shaped cutting knife. 5. Apparatus according to claim 4, characterized in that the preform ring is interchangeable. 15th