DE19506953A1 - Sealing cap for container, esp. cartons or boxes - Google Patents

Abstract

The sealing cap (1) consists of a one-piece cardboard or cardboard composite construction. Additional mouldings are formed on the cap face or on the gripping section (5). The cap may be used as a glue-in housing base. One or more spillage or bleed openings are formed in the cap face. They are closed off by a sealing flap which extends under the bead edge of the cap.

Description

The invention relates to a closure lid for containers, especially cardboard or tin cans, in the form of a one press lid with a lid mirror, which at its edge in a circumferential, almost perpendicular to the lid mirror arranged wall section which merges into an inward directed gripping section ends, and being the circumferential Wall section in its upper area one to the outside has the above bearing edge, and a method for Production of such a cover.

Cap for containers, e.g. B. cardboard boxes or tin cans are known in various shapes and sizes. These caps are now often made of plastic manufactured or have plastic components, which is not only for environmental reasons, but also with regard to the Disposal costs (DSD fees, "Green Dot") disadvantageous is. The disposal costs for plastics are in the Federal Republic of Germany currently about seven times as high those for cardboard.

The object of the present invention is therefore a To create a cap of the type mentioned, the from an environmentally friendly compared to a plastic lid Lich and cheaper in terms of disposal costs Material with similar usage properties, and a To provide procedures by which one of the can be produced economically.  

This object is achieved in that the One-piece cardboard cover, cardboard composite or the like. Such a cover points with respect similar to its flatness, stability and robustness rise like a plastic lid. In particular, close the can relatively tightly with such a lid and stabilize the top of the can.

The stability and flatness of the cover can be by additional shapes according to the invention in the floor mirror the lid and / or the gripping section even further improve.

The closure cover according to the invention can be advantageous also use as a glued-in container base. In order to the production of the containers can be combined as a whole fold and their manufacturing and disposal costs still further decrease.

According to a preferred embodiment of the invention, in the lid mirror one or more scattering and / or removal openings formed. In this case, the cover be firmly glued or sealed in the container, so that prevents unintentional loosening of the cover becomes.

For many areas of application, especially in the kitchen, provide spreading and / or removal openings a handling relief in relation to the container. It has proven to be proven to be advantageous when the spreading and / or removal opening can be closed by a flap. In further training this inventive concept is intended that the closure conveniently flap on the outer edge of the ver end cover facing away from the cover mirror with this  firmly connected or sealed and on the other hand the spreading or removal opening is peelable.

With such a configuration, the closure flap According to the invention be designed so that they are among the Bead of the sealing cover is sufficient. So the ver closing flap not only in front of an unintended one Open protected, but can be opened after the first time Open and close again easily. The opening and The closure flap is reclosed according to the invention thereby facilitated that in the area of the inner edge Spreading and removal opening in the flap a fold line is formed. So that the part of the opening Folding flap slightly folded away and the opening with it be released.

The opening and reclosing of the flap will further facilitated by the fact that according to another Embodiment of the invention at the free end of the closure flap an angled gripping section is articulated via a folding line is. If the flap is in its closed position pushed the bead of the cover, the angled gripping section through the edge bead on the actual closure flap pressed and is not there more from the sealing cover designed as a push-in cover forth.

Advantageously, the cardboard, cardboard composite or the like. from which the cap is made, in particular one side painted, laminated, coated and / or water and / or be fat tight. This editing can either be on be attached to the outside of the closure lid, with what both the closure lid and the container as a whole become clearer and possibly more resilient and / or Processing can also be done on the inside of the cover  concern what, in particular with certain fillings of the Container is appropriate and possibly necessary.

The process for making the above described Part of the task cover concerned is fiction solved according to that a flat cardboard, cardboard composite or the like. is introduced into a production tool, the Lower part (lower tool) on a disc or one Conveyor belt is arranged and all subsequent ferti supply stages with that in a first manufacturing stage by means of a first upper tool in the form of the stamp a deep-drawing tool the lid mirror and the circumferential Wall section are deep drawn that in a second Production level on the lower tool as the upper tool Flaring bell is placed in which a circumferential, round Recess is formed, in the outer edge region of the protrudes the upper edge of the wall section of the deep-drawn part, that the located under the lid mirror and in the Height movable part of the lower tool in such a way upwards is driven that the upper end of the wall section of the Deep-drawn part along the recess in the crimp bell inside to a bead (flanging) that in a third Production stage as upper tool a two-part pressing tool engages, the outer ring designed as a press ram part of the bulge of the wall section into a formation of the outwardly projecting support edge in the press stamp trained side of the lower tool Recess presses, and that the bead of the wall section additionally from an inner stamp that can be moved against the bead is pressed into the recess in the lower tool.

The closure cover is thus made up of one part and one environmentally friendly material manufactured in several stages, the lower part of the production tool is always the same and runs through all production stages. The part to be molded  thus does not need to be moved to another after one production cycle Tool to be reinserted, what with the used one Material cardboard, cardboard composite or the like for an additional Dimensional stability ensures and with respect to the course of the fro Positioning procedure otherwise required buffer makes redundant. The dimensional stability thus achieved ensures a good fit of the lid on the container and also closes it relatively tight. This is especially necessary for aromatic fillers.

Depending on the power requirement, the machine structure can be single-lane, be designed as multiple lanes or rotative. Besides, that can Manufacturing processes both from the role and from prefabricated boards. Another advantage of The method according to the invention consists in the possibility of Non-circular lids are easily formed with corner radii to manufacture.

The deep-drawn part should in particular advantageously guided inside and outside during the flaring process and be supported. This can affect the quality of the lid be improved that the board before deep drawing is shaped accordingly, either partially or all around.

The flanging process is facilitated by the fact that the upper edge the wall section of the deep-drawn part according to the invention directly is moistened before flanging. This can be done using normal water or a suitable liquid mixture respectively. If this is done with soapy water, it rolls Bead bulges particularly well. The curling takes place according to the invention even easier if in particular the circular round Recess in the crimp bell with a glide improving material is coated. By introducing one  Glue seam before flaring can still tighten the flare will.

Like the crimp bell, this is also according to the invention Press tool of the subsequent third production stage heated. Flaring speed and temperature of the bell as well of the pressing tool depend in particular on the one used Cardboard or similar material.

According to a development of the inventive concept in Press ring and ram of the press tool outlines forms, in particular in the form of a recess in the as Pressing outer ring for forming a stack edge are provided on the top of the bead. Should for technical reasons, no paragraph in the lower tool the lateral limitation according to the invention will be possible controlled from above by an additional delimitation stamp ert.

According to a further embodiment, the Invention of the bead on the circumferential wall section Moisturizes water or water vapor, which on the one hand Press time is reduced and secondly the quality of the end product is improved.

Finally, it has been used for various applications proved to be advantageous in that the closure cover after the Pressing process subjected to a repressing and / or cooling process becomes.

Other features, advantages and possible uses of the Invention result from the following description of Embodiments and the drawing. Thereby everyone described and / or illustrated features for himself or in any combination the subject of  Invention, regardless of its summary in the Claims or their relationship.

Show it:

Fig. 1 is a view of a mounted on a box cap from above,

Fig. 2 is a partial section along the line AA in Fig. 1 showing the construction of modern fiction, closure cap,

Fig. 3 a sectional view of the first production stage of the manufacturing process according to the invention relating to the deep-drawing,

Fig. 4 in a Fig. 3 representation corresponding to the second production stage of the crimping,

Figure 5 corresponding to FIGS. 3 representation. The third production stage of the pressing,

Fig. 6 in FIG. 5 corresponding illustration of a further embodiment of the pressing operation shown in FIG. 5,

Fig. 7 in a Fig. 5 representation corresponding to a still further embodiment of the pressing operation shown in FIG. 5,

Fig. 8 is a partial section through a scattering or removal opening having closure lid closed closure flap,

Fig. 9 is a Fig. 8 representation corresponding with geöff neter closure flap,

Fig. 10 in a representation according to FIG. 2, a further embodiment of a closure lid according to the invention with additional shapes and

Fig. 11 shows an embodiment of a closure lid according to the invention in a modification as an adhesive container bottom.

The cap 1 shown in Fig. 1 is used for closing containers in which it is predominantly 2 doses. These can consist of cardboard, sheet metal or other materials and can have a wide variety of shapes and sizes, an out-of-round lid shape with corner radii being shown in FIG. 1.

As can be seen in FIG. 2, the closure cover 1 consists of a cover mirror 3 , which at its edge merges into a circumferential, approximately perpendicular to the cover mirror 3 at an ordered wall section 4 , which ends in an essentially inwardly directed bead-shaped gripping section 5 . The circumferential wall portion 4 has in its upper region a protruding outwardly supporting edge 6, which rests on a can wall. 7

If the can 2 is to be closed in a vacuum-tight manner, in particular to increase the shelf life, an additional can membrane 8 is often provided, which is designed such that the closure lid 1 rests essentially on this can membrane 8 , as illustrated in FIG. 2.

The closure cover 1 consists of a one-piece cardboard, cardboard composite or the like, which is given its shape in a manufacturing process consisting essentially of three manufacturing stages, which has the features shown in FIG. 2. The main steps are shown in FIGS. 3 to 5.

The same lower part of the production tool, the lower tool 9 , is always used in all production stages. This is arranged on a disc or a conveyor belt, not shown, and depending on the power requirement, the machine structure can be single-lane or multi-lane. The lower tool 9 therefore passes through all production stages.

The first manufacturing stage is shown in FIG. 3. Here is a flat cardboard, cardboard composite or the like. Applied to the lower tool 9 , the vertically movable part 10 is moved by means of a stamp, not shown, whereby the cover mirror 3 and the perpendicular wall portion 4 are formed.

The deep-drawn part 11 thus produced is then fed to a second production stage, which is illustrated in FIG. 4. Here, a heated crimp bell 12 is placed on the lower tool 9 , 10 as the upper tool, in which a circumferential round recess 13 is formed, in the outer edge region 14 of which the upper edge of the wall section 4 of the deep-drawn part 11, identified by 15 in FIG. 3, projects. The recess 15 is coated with a material that improves lubricity, such as Teflon or chrome. In Fig. 4, the procedural state is shown in which the part 10 of the lower tool located under the cover mirror 3 and movable in height has already moved upwards so far that the upper end of the wall section 4 of the deep-drawn part 11 along the recess 13 of the Crimp bell 12 has been rolled inwards to form a bead 16 . This process is called flanging for short. The recess 17 formed in the lower tool 9 is completely filled by a bell on the flange 12 formed thereon, so that the upper end of the wall section 4 is supported by the vertical surfaces of the lower tool 9 and the recess 13 of the flange bell 12 .

In the third production stage shown in FIG. 5, the crimp bell 12 is replaced by a two-part pressing tool, which consists of a heated press ram 19 designed as an outer ring and an inner ram 20 which can be moved against the inside of the press ram and is spring-loaded at the top. The bead 16 is pressed downward with the flat underside of the press ram 19 , a part of the bead 16 being pressed into the recess 17 in the lower tool 9 , thus forming the support edge 6 .

The at the same time moving from the inside against the bead 16 inner die 20 ensures that the space 21 formed by the recess 17 in the lower tool 9 and the press die 19 is completely filled by the part of the bead 16 forming the support edge 6 and the free end of the wall section 4 is rolled into a complete bead 16 inside. In order to be able to influence the size and shape of the flanging on the inside better, the inner punch 20 can be designed to be spreadable.

Both the flanging process shown in FIG. 4 and the pressing process illustrated in FIG. 5 are facilitated by moistening the cardboard, cardboard composite or the like immediately before the flanging or pressing. In the case of flanging, this can be normal water, soapy water or another liquid mixture and, in the case of pressing, can be carried out with steam, among other things. This also improves the dimensional stability of the closure cover.

This is particularly advantageous in the case of the modified pressing process shown in FIG. 6, in which an additional recess 22 is formed in the outer ring serving as the pressing die 19 and is intended for forming a stacking edge on the upper side of the bead 16 . The production of this particular embodiment of the bead a Ver cover is done in the same way as described in connection with the pressing process, which is illustrated in Fig. 5.

If it is not possible to form a recess 17 in the lower tool 9 , the outer ring serving as a press ram can be replaced by a press ram 38 and an additional limit ram 39 which controls the lateral limit from above.

After the pressing operations shown in FIGS. 5 and 6, the cap 1 may be subjected to a still Nachpreß- and / or cooling process, which in particular its flatness, dimensional stability and durability is further improved. The cooling process also shortens the pressing time, which can increase output and reduce manufacturing costs.

After the flanging and / or pressing and / or repressing process, a tool (not shown) can also be used to drive under the bead 16 , which also serves as a handle, in order to support the rolling-in process, thus achieving greater form stability. The flaring can be further strengthened in that a glue seam is introduced in the deep-drawing part before the flanging process.

In FIGS. 8 and 9 a particular embodiment of the closure cap 1 is shown, a stray or removal opening 24 is formed in the central panel 3, which is reclosable by a closure flap 25. The cardboard or the like. Existing flap 25 is on the side facing away from the outer edge of the closure cover 1 side 26 of the cover mirror 3 with this at 27 firmly connected or sealed. On the other side of the spreading or removal opening 24 , the closure flap 25 is sealed in a peelable manner. The closure flap 25 itself preferably extends to under the bead 16th For easier opening and reclosing, the closure flap 25 has two fold lines 28 and 29 . The first fold line 28 is arranged in the region of the inner edge 30 of the scattering and removal opening 24 . As can be seen from FIG. 9, it enables the closure flap 25 to bend during an opening process and thus releases the scattering and removal opening.

About the second fold line 29 at the free end of the closure flap 25 an angled gripping portion 31 is articulated. If the closure flap 25 pushed for closing the box 2 below the bead 16, the gripping portion 31 is pressed shut by the bead 16 on the closure flap 25 so that the gripping portion 31 does not protrude from the designed as a press-in cap. 1 By the gripping section 31 , however, the closure flap 25 is also latched under the bead 16 . To open the closure flap 25 , the gripping section 31 only needs to be pulled and the scattering and removal opening 24 is opened, as can be seen in FIG. 9.

If the can 2 can not be determined for refilling, a scattering and discharging port 24 can be in attachment of the cap 1 into the box 2 or glue sealing-in, which is indicated in Fig. 8 by a fastening point 32. Sealed openings, openings with the possibility of reclosing and so-called turntables can be used as scattering and removal openings 24 .

As can be seen from FIG. 10, additional shapes 36 and 37 can be formed in the closure lid 2 , in particular in the gripping section 5 and in the lid mirror 3 , which improve the stability and flatness of the lid.

Finally, FIG. 11 shows yet another embodiment of a closure cover which is largely the same as that in the previously described figures. The cover can then also be used as a glued-in container base 33 , the base compression at 34 being smaller and stronger than in the case of the press-in cover. The glue point is marked with 35 .

Reference list

1 cover
2 can
3 lid mirrors
4 wall section
5 gripping section
6 support edge
7 can wall
8 can membrane
9 lower tool
10 Movable part of the lower tool
11 deep-drawn part
12 crimp bell
13 recess in 12
14 outer edge area of 13
15 upper margin of 4
16 bead
17 recess
18 head start
19 ram (outer ring)
20 inner stamps
21 space
22 recess in 19
23 stack edge at 16
24 Spreading and removal opening
25 flap
26 opposite side of 3
27 attachment point
28 fold line
29 fold line
30 inner edge of 24
31 gripping section
32 attachment point
33 container bottom
34 Floor pressing
35 glue point
36 Formation of 5
37 Formation of 3
38 press ram
39 delimitation stamp

Claims (26)

1. closure lid for containers, in particular cardboard or tin cans, in the form of a press-in lid with a lid mirror, which at its edge merges into a circumferential, approximately perpendicular to the lid mirror arranged wall section, which ends in an inward gripping section and wherein the circumferential wall section has an outwardly projecting support edge in its upper region, characterized in that the closure cover ( 1 ) consists of a one-piece cardboard, cardboard composite or the like. 2. Closure cover according to claim 1, characterized in that in the cover mirror ( 3 ) and / or gripping section ( 5 ) additional surface formations ( 36 , 37 ) are formed. 3. Closure cover according to claim 1 or 2, characterized in that the closure cover ( 1 ) can be used as an adhesive housing base ( 33 ). 4. Cap according to claim 1 or 2, characterized in that one or more scattering and / or removal openings ( 24 ) are formed in the cover mirror ( 3 ). 5. Cap according to claim 4, characterized in that the scattering and / or removal opening ( 24 ) can be closed by a closure flap ( 25 ). 6. A closure cap according to claim 5, characterized in that the closure flap ( 25 ) on the outer edge of the closure cover ( 1 ) facing away ( 26 ) of the cover mirror ( 3 ) with this is firmly connected or mirrored and on the other side of the litter - or removal opening is sealed peelable. 7. A closure cap according to claim 5 or 6, characterized in that the closure flap ( 25 ) under the bead ( 16 ) of the closure cover ( 1 ) extends. 8. Cap according to claim 6 or 7, characterized in that the closure flap ( 25 ) in the region of the inner edge ( 30 ) of the scattering and removal opening ( 24 ) has a fold line ( 28 ). 9. Cap according to one of claims 6 to 8, characterized in that an angled gripping section ( 31 ) is articulated at the free end of the closure flap ( 25 ) via a fold line ( 29 ). 10. Closure cover according to one of claims 5 to 9, characterized in that the closure flap ( 25 ) consists of cardboard or the like. 11. Closure cover according to one of the preceding claims, characterized in that the cardboard, cardboard composite or Like in particular lacquered, laminated on one side, is coated and / or waterproof and / or greaseproof. 12. A method for producing a closure lid for containers, in particular cardboard or tin cans, in the form of a press-in lid with a lid mirror, which merges at its edge into a circumferential wall section arranged approximately perpendicular to the lid, which ends in an inward gripping section and wherein the peripheral wall section in its upper region has an outwardly projecting support edge, in particular according to one or more of the preceding claims, characterized in that a flat cardboard, cardboard composite or the like is introduced into a production tool, the lower part (lower tool) ( 9 , 10 ) is arranged on a disc or a conveyor belt and all subsequent production stages with that in a first manufacturing stage by means of a first upper tool in the form of the stamp of a deep-drawing tool, the lid mirror ( 3 ) and the peripheral wall section ( 4 ) deep-drawn n, that in a second production stage, a crimp bell ( 12 ) is placed on the lower tool ( 9 , 10 ) as the upper tool, in which a circumferential round recess ( 13 ) is formed, in the outer edge region ( 14 ) of which the upper edge ( 15 ) of the wall section ( 4 ) of the deep-drawn part ( 11 ) protrudes that the part ( 10 ) of the lower tool located under the cover mirror ( 3 ) and movable in height is moved upwards such that the upper end ( 15 ) of the wall section tes ( 4 ) of the deep-drawn part ( 11 ) along the recess ( 13 ) in the crimp bell ( 12 ) rolls inwards to form a bead ( 16 ) that a two-part pressing tool engages in a third production stage as the upper tool, the one designed as an outer ring Press ram ( 19 ) a part of the bead ( 16 ) of the wall section ( 4 ) in a to form the outwardly projecting support edge ( 6 ) in the press ram ( 19 ) facing side of the Lower tool ( 9 ) formed recess ( 17 ), and that the bead ( 16 ) of the wall section ( 4 ) is additionally pressed into the recess in the lower tool ( 9 ) by an inner punch ( 20 ) which can be moved from the inside against the bead ( 16 ) . 13. The method according to claim 12, characterized in that the deep-drawn part inside and outside during the flaring process is guided and supported. 14. The method according to claim 12 or 13, characterized records that the board partially or before deep drawing is shaped all around.   15. The method according to claim 12, characterized in that the upper edge ( 15 ) of the wall section ( 4 ) of the deep-drawn part ( 11 ), in particular directly before flanging, is moistened. 16. The method according to claim 12, characterized in that moistening with normal water, soapy water or another liquid mixture. 17. The method according to claim 12, characterized in that in particular the circumferential round recess ( 13 ) in the crimp bell ( 12 ) is coated with a material which improves the lubricity. 18. The method according to claim 12 or 17, characterized in that the crimp bell ( 12 ) is heated. 19. The method according to any one of claims 12 to 16, characterized characterized in that before the flanging process in the deep-drawn part a glue seam is introduced. 20. The method according to claim 12, characterized in that the inner punch ( 20 ) is designed to be expandable to influence the size and shape of the flare inside. 21. The method according to claim 12, characterized in that the pressing tool ( 19 ) is heated. 22. The method according to claim 12, characterized in that in the outer ring serving as a press ram ( 19 ) from a recess ( 22 ) for forming a stacking edge ( 23 ) on the bead ( 16 ) is provided. 23. The method according to claim 12, characterized in that the lateral limitation of the press ram ( 38 ) is carried out by an additional limit ram ( 39 ). 24. The method according to any one of claims 12 to 23, characterized in that the bead ( 16 ) of the wall section ( 4 ) is moistened with water or steam before pressing. 25. The method according to any one of claims 12 to 24, characterized in that the closure lid ( 1 ) after the pressing (third manufacturing stage) is subjected to a repressing and / or cooling process. 26. The method according to any one of claims 12 to 25, characterized in that after the flanging and / or pressing and / or repressing process with a tool under the (handle) bead ( 16 ) is driven.