ES2252534T3 - LID WITH CLOSURE IN TWO PARTS. - Google Patents

Abstract

The invention relates to a plastic packing consisting of a packing cavity and at least a first and a second lid foil, wherein the lid foils in the sealing area are at least peelably sealed in part onto the packing cavity, the lid foils have an overlapping area and said lid foils are sealed at least partly on top of each other in the overlapping area, wherein said sealing is peelable. The invention also relates to a method for the production of the packings disclosed in the invention.

Description

Lid with closure in two parts.

The present invention concerns a container of plastic with a cavity in the container and at least a first and a second plastic sheet, where the plastic sheets show a coating area, and in the coating area they are sealed between them, at least partially, and where this seal can be take off.

In addition, the present invention is about a method for the manufacture of packages according to the invention.

Packaged products, especially those food, are presented for sale to the consumer, today, more and more frequently, in plastic containers. These containers plastic show a cavity in the container, in which it Find the packaged product, and a plastic sheet. The blade Plastic is sealed in the cavity of the container.

However, the containers often show the disadvantage of it is difficult to open the plastic sheets sealed only by hand. In addition, if it abruptly takes off the plastic container cavity sheet, the product can slip or fall As the packaged product, I often don't know consumes immediately after opening, it is advantageous that the container can be closed again after opening. For this reason, no tests have been lacking in the past to be able to dispose of containers that can be closed again.

US 5 857 582 and 6 056 patent documents 141 describe this type of packaging with sealed plastic sheets at the bottom, detachable and, at least partially, of several layers.

In addition, EP 0 564 695, DE 39 25 746, EP 0 386 490,
DE 39 41 183, EP 0 408 516, WO 97/050023, EP 0 716 986, EP 0 595 368, EP 0 579 262,
EP 0 506 295, EP 0 427 513, EP 0 427 512, EP 0 385 565, EP 381 329 or EP 0 379 927, which instructs about, or the method and devices for manufacturing of a container that can be closed again, and / or of the container that can be closed again. All containers that can be re-closed, presented in the publications mentioned above, have the disadvantage that, or their manufacture is expensive, and / or can only be re-closed badly.

It is a function of the present invention, then, make available containers that do not show the disadvantages of state of the art, and whose manufacture is simple.

This function is solved by configuration of a plastic container with a cavity in the container and, at least, a first and a second plastic sheet, where the plastic sheets show a coating area, and in the area of coating are sealed between them, at least partially, and where this seal can take off, and the plastic sheets are sealed in the sealing area of the container cavity, thereby the seal can peel off, at least in the area of covering.

A cavity in the container, in the sense of invention, is each cavity in the usual container for the specialist, which is manufactured from a sheet of one or several layers conventional, thermoplastic and stably, preferably for food packaging.

With special preference, the cavity is made of the container from a multilayer sheet with a sheet of foamed base, preferably a foamed polyolefin sheet, and, with special preference, a polypropylene sheet.

With very special preference, the container cavity from a sheet, as offered in the Patent notification with reference to the registration of the German industrial property 198 40 146.2. This notification of the patent is introduced, with this, by way of reference, and thus serves as part of the publication.

The cavities in the containers, preferably sausages, close, after filling with the product to be packaged with at least two, preferably up to eight plastic sheets, which partially coated and partially sealed between they, preferably that can be stuffed, where sealed It can take off. As plastic sheets, they are especially suitable multi-layer films with a waterproof layer gas, made from vinyl ethylene alcohol copolymer, preferably polyethylene terephthalate (PETP) / Agent layer Adhesive / Polyethylene / Adhesive agent layer / Alcohol copolymer vinyl ethylene / Adhesive agent layer / Polyethylene, whereby the polyethylene terephthalate layer can be replaced by that of Polypropylene.

Provided that the package according to the invention is Gas impermeable, can show the cavity of the container and / or the plastic sheets also as a gas impermeable layer SiO_ {x}. Preferably, thus, the sheets are formed plastics from PETP / SiO x / Adhesive agent / Polyethylene.

Seal each other, in the sense of invention means that the two plastic sheets are sealed correspondingly one over the other, so that both sheets and The coating area is in a plane. This type of sealing can be made in a particularly simple way, with conventional sealing tools.

The plastic sheets preferably show on at least one of its two surfaces, a sealing layer that It can take off. As a sealing layer, it is used preferably a mixture of LDPE (Low Density Polyethylen) and a polybutylene The mixture preferably contains a composition. centesimal of 15 to 30%, especially preferably, of 20 at 28%. Preferably, the polybutylene shows an index of melting (MFI) in the area of 0.3 to 2.0 g / 10 min (190ºC and 216 kg according to ASTM 1238).

The plastic sheets are sealed, according to the invention, to the container cavity, in the coating area, with which the plastic sheets are sealed in the cavity of the container, at least partially, so that they can take off. For get a seal that allows takeoff, plastic sheets They are sealed in the container cavity at a temperature of 130º to 150º, preferably from 135º to 145º, and at a pressure of 3 to 8 x 10 5 N / m2, preferably 4.0 to 5.0 x 10 5 N / m2.

Provided that the packages according to the invention they must show a coating area that cannot be peeled off, it is say, permanently sealed, from the sealing zone, then permanent sealing is performed preferably at a temperature at least 10 ° higher, and preferably at double pressure, in Comparison with detachable seal. A permanent seal, in the sense of the invention is a seal in which the force of detachment of the plastic sheets must be at least five times greater than in the area of the detachable seal.

The sealing area in the container cavity is preferably located on a horizontal plane, preferably  over the packaged product, and preferably extends over this plane, surrounding the whole packaged product. In a container of polygonal plastic, plastic sheets can be sealed permanently preferably in at least a part of this polygon, with the container cavity, while the foil plastic from the remaining sealing zone is sealed with the cavity of the container so that it can take off. In a round container, it it can preferably provide between 5 and 25% of the area of sealed with a permanent seal.

In a chosen form of execution, it is configured the package according to the invention, such that the sheets plastics, in the area where the coating area overlap and the sealing zone, only partially seal each other, or that are not sealed in any way. Thus, you can easily take the upper plastic sheet by the ends of the area of coating, in order to open the container.

In a chosen form of execution, it is configured the package according to the invention, such that the sheet upper plastic is sealed in the lateral area of the plastic sheet, in the coating area, so that it cannot peel off or I can only do it partially. Thus, you can easily take the upper plastic sheet throughout the area, in order to open the container

In another form of execution chosen, the container according to the invention it is configured in such a way that the sheets plastics are permanently sealed, at least partially, in, At least one distal end.

Thus, a total detachment of The plastic sheet.

An especially preferred embodiment of the package according to the invention is configured so that the coating area and, where appropriate, the sealing area, can be close again, at least partially. Preferably, it is done the closure by a velcro closure, a tear seal, a packing lip, an elastic snap fit, a button closing with a hole, a suitable bonding material or a strip of paper, which is in contact, at least partially, with both parts of the plastic sheet.

Appropriate tear seals are offered, for example, and EP 0 621 197 A1. Packing lips are offered and suitable elastic pressure fittings, for example, in EP 0 427 512. Suitable Velcro fasteners are offered, for example, in the DE 198 59 043.1 patent document. These publications are introduce, with this, by way of reference, and serve, as well, as Part of the post.

Preferably, the container cavity is sealed Gas-impermeable with plastic sheets, which instead, they seal each other in the coating area, so gas impermeable To prolong the good condition of the products packaging, such as food, is preferably carried out an exchange of gases in the container.

In a chosen form of execution, both sheets plastics are joined by a very safe sealing material, such as it is offered, for example, in the parallel notification with the reference DE 101 20 366.7, in which the detachment occurs the first time the container is opened. The parallel notification with reference DE 101 20 366.7 is introduced, with this, by way of reference, and thus serves as part of the publication.

The detachment of the sealing material caused at the first opening of the container is done, preferably, by way of breakage and / or at least by means of the partial removal of at least part of the sealing material, and / or by deformation of at least a part of the material of sealed, so that detachment can be detected without means technicians By the state of sealing material, the consumer can differentiate broken containers from containers in their state of original packaging

       \ newpage
    

Preferably, both plastic sheets are connected, at the distal end, by means of a joint, of so that they can be covered and uncapped, with the cavity of the container.

Preferably, the sealing plane is located inclined with respect to the horizontal, preferably with an angle of inclination of 2 to 45º, with special preference, of 5 to 30º, and, in a completely preferred way, from 6 to 15º.

With special preference, in the package according to the invention is packaged food, preferably meats or resistant sausages, especially fresh or cooked.

The packages according to the invention enable the consumer open the container quickly and without a skill special. In addition, after the first opening, you can return to easily close the air-impermeable containers according to the invention, by means of both plastic sheets.

When opening the plastic sheet for the first time upper, the lower plastic sheet prevents the product from falling out of the container cavity.

In another aspect, the present invention addresses also of a method for the manufacture of plastic containers according to the invention. According to the invention, it incorporates these methods:

to)

He sealing, at least partially, of the plastic sheets in the area of coating and then

b)

He sealed, at least partially, of multi-layered plastic sheets joined together, in the cavity of the container already filled with the product to be packed

Of particular preference are the methods in that the sealing of the plastic sheets in the cavity of the container, at least partially, they can take off in the area of covering.

In addition, methods in which the sealing of at least a partial area of at least one of the sheets plastic in the cavity of the container can be made, at least partially, permanently.

The invention is explained below by Figures 1 through 3. Explanations are presented only to as an example, and do not limit the general projects of the invention.

Figure 1 is a three-dimensional side view of a plastic container provided with two plastic sheets, in closed state

Figure 2 is a three-dimensional side view of a plastic container provided with two plastic sheets, in semi-open state

Figure 3 is a top view of a container of plastic provided with two plastic sheets, in a closed state.

Legend of the figures from 1 to 3

one

Container

2

Container cavity

3rd

First plastic sheet

3b

Second plastic sheet

4

Zone sealing of a cavity of a container or of a sheet of plastic

5

Area of coating of plastic sheets 3a and 3b

6

Borders of the sheets accessible from outside, of the second plastic sheet   3b in the coating area

7

Axis distal of plastic sheets 3a and 3b

8

He edge of the sheet 8 covered by the plastic sheet 3b of the sheet plastic 3a, in the closed state

9

The zone in which the sealing zone 4 and the coating area 5 are overlap.

Figure 1 shows a plastic container 1 closed according to the invention, which consists of a cavity of the container 2, a first plastic sheet 3a and a second sheet plastic 3b. Both plastic sheets 3a and 3b are sealed one above the another so that they can take off, in their area of coating. The sealing zone is represented by the two parallel lines dotted Because the coating area 5 has not been sealed all over the field, sheet 3b of the sheet 3a, and the sealing zone 10 can be abruptly opened. specialist distinguishes that the two sheets 3a and 3b and the area of coating 5, as well as the sealing zone 10, are in a vertical plane, so that the sealing of a plastic sheet over the other can get with extremely simple tools. In addition, in this way, the sealing of the container does not protrude from the outside. of the coating area 5 and / or the sealing area 10, with They can be easily stacked. Plastic sheets 3a and 3b are sealed in the sealing zone 4, partially separable, in the container cavity 2. At the distal ends 7, the plastic sheets in the sealing zone 4, for all the amplitude, of permanently, in the cavity of the container 2. The closed container is open by raising the edge of the sheet 6 of the second plastic sheet 3b and replacing it on the distal axis 7 of the plastic sheet 3b As for the edge of the sheet 8 of the plastic sheet 3a lower, previously covered, expose, too it can be opened by pulling and replacing it by distal end 7 of the plastic sheet 3a.

Figure 2 represents the plastic container partially open

The package according to Figure 2 shows, in the second plastic sheet 3b, an edge of the sheet 6, which, in the closed state, rests only on the first plastic sheet 3a bottom, and it is not sealed in sheet 3a, and, with it, it is easily accessible to the consumer. The specialist also distinguishes the part of the sealing zone 4 that is secured by the sheets open plastic. The sealing zone 4 that can be secured as well as the outer surface of the first lower plastic sheet 3a, which rests on the sealing zone, in the closed state, of the container, sealed so that it can be closed again with a material of reusable glue.

In addition, the specialist distinguishes that the container can be closed again after opening, while the sheets 3a and 3b plastics are placed on top of each other, and make up a coating area

Figure 3 shows a package according to the invention in a top view, whereby the sealing zone 4 is represents as a dotted surface. The coating area 5 of the plastic sheets 3a and 3b is located between the edge of the upper sheet 6 and the edge of the sheet 8 covered. To the extreme distal 7 of the plastic sheets 3a and 3b are sealed these sheets permanently in the cavity of the container 2, for avoid an abrupt opening of the plastic sheets 3a and 3b. In the zone 9 in which the sealing zone 4 and the coating area 5 they overlap, the plastic sheets are not sealed between them, or just they do it partially, so that they can be separated, and, with it, you can easily take the second plastic sheet 3b in this coating area

Claims (13)

1. A plastic container (1) with a cavity in the container (2) and at least a first and a second plastic sheet (3a, 3b), where the plastic sheets (3a, 3b) show an area of coating (5), and in the coating area (5) they are sealed between they, at least partially, where this seal can take off, and the plastic sheets (3a, 3b) are sealed in the sealing zone (4) in the cavity of the container (2), whereby the sealing can be peel off, at least partially, in the coating area. 2. The plastic container according to claim 1, characterized in that up to eight plastic sheets are sealed, at least partially, so that they can be detached, in the cavity of the container (2). 3. The package according to claim 1 or 2, characterized in that the plastic sheets (3a, 3b), in the area in which the coating area (5) and the sealing area (4) overlap, are only sealed between them partially, or they don't do it at all. 4. The package according to one of claims 1 to 3, characterized in that the upper plastic sheet (3b), in the coating area (5), is not sealed so that it can be detached, on the plastic sheet (3a) lower, or only partially. 5. The package according to one of claims 1 to 4, characterized in that the plastic sheets (3a, 3b) are permanently sealed at least one distal end (7), at least partially. 6. The package according to one of claims 1 to 5, characterized in that the coating area (5) and, where appropriate, the sealing area (4), can be re-closed, at least partially, preferably they can be re-closed by a velcro closure, a tear seal, a packing lip, an elastic snap fit, a closure button with a recess, a suitable bonding material or a strip of adhesive paper, which is in contact, at least partially, with both parts of the plastic sheets (3a, 3b). 7. The package according to one of claims 1 to 6, characterized in that the package is gas impermeable. 8. The package according to one of claims 1 to 7, characterized in that the plastic sheets (3a, 3b) are joined by a very secure sealing material, which is detached with the first opening of the container. 9. The package according to one of claims 1 to 4, characterized in that the plastic sheets (3a, 3b) are connected, at the distal end, by means of a joint, so that they can be covered and uncovered, with the container cavity (2). 10. The package according to one of claims 1 to 9, characterized in that the sealing plane is inclined with respect to the horizontal, preferably with an inclination angle of 2 to 45 °, especially preferably 5 to 30 ° , and, in a completely preferred way, from 6 to 15º. 11. A method for manufacturing the package, according to one of claims 1 to 10, characterized in that, first, the plastic sheets (3a, 3b) are joined together by at least partially sealing detachable, and then the plastic sheets (3a, 3b) of several layers, joined together, are sealed, at least partially, in the cavity of the container (2) already filled with the product to be packaged. 12. The method according to claim 11, characterized in that the sealing of the plastic sheets (3a, 3b) is carried out so that it can be detached in the cavity of the container (2), at least in the coating area. 13. The method according to one of claims 11 or 12, characterized in that the sealing of at least a partial area of at least one of the plastic sheets (3a, 3b) is carried out permanently in the container cavity, at least partially.