Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • B65D5/00—Rigid or semi-rigid containers of polygonal cross-section, e.g. boxes, cartons or trays, formed by folding or erecting one or more blanks made of paper
  • B65D5/42—Details of containers or of foldable or erectable container blanks
  • B65D5/72—Contents-dispensing means
  • B65D5/74—Spouts
  • B65D5/746—Spouts formed separately from the container
  • B65D5/747—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall
  • B65D5/748—Spouts formed separately from the container with means for piercing or cutting the container wall or a membrane connected to said wall a major part of the container wall or membrane being left inside the container after the opening

Definitions

• the present invention relates to a closure device made of plastic, which can be attached over a pierceable point of a closed container made of laminated paper or cardboard with at least one layer of plastic film, with the features of the preamble of patent claim 1.
• Closure devices of this type consist of a bung-shaped lower part with a cylindrical pouring spout, which can be connected or connected to the container, and a screw cap, which can be screwed onto the lower part, and a cylindrical piercer, which is open on both sides in the axial direction and can be moved like a screw in the lower part is mounted, means being present in the screw cap which move the piercer downward when the screw cap is unscrewed for the first time, the cylindrical piercer having a ring with an external thread and at least one cutting element directed towards the container.
• Such closure devices are welded or glued to the containers made of laminated paper or cardboard.
• the containers made of laminated paper that are of interest here have a cubic basic shape and are used primarily for packaging liquid products, in particular products from the food industry. From the outside inwards, such laminated papers or cartons accordingly have the following layer sequence:
• a predetermined opening point is provided in the laminated paper for those containers which are provided with a closure device of the type of interest here.
• the target opening location is a pre-punched opening, in which the top three layers are normally severed, while the bottom two layers of aluminum and polyethylene are completely intact.
• the closure device made of plastic cuts through the screw cap's the puncture the laminated paper exactly in the area of the pre-cut.
• the invention makes use of the knowledge that a stretched and stretched plastic film underneath
• Figure 1 shows a first embodiment of a closure device in a vertical diametrical section, wherein the closure device is shown in the assembled state before first use
• Figure 2 also shows a vertical cross section of the closure device in the state of use when the screw cap is unscrewed.
• Figure 3 shows a second embodiment of a closure device in the unassembled state in a side view.
• FIG. 4 shows a development of a push-through in a first preferred embodiment
• Figure 5 shows just such a processing of a second advantageous embodiment.
• FIGS. 1 to 3 only serve to clarify and explain two embodiments of a closure device to which the further development according to the invention can be applied, the actual invention is preferably illustrated in FIGS. 4 and 5.
• FIG. 2 shows the closure device according to FIG. 1 in the state of use after the screw cap has been completely unscrewed, the piercer is accordingly in a lowermost position.
• the closure device comprises the three main parts, namely a bung-like lower part 2, in which a piercer 3 can be moved downwards in a screw-like manner, and a screw cap 4, which has the function both of closing the bung-like lower part 2 and also during the unscrewing process when it is first opened Set puncturer 3 to rotate and thereby cause the puncturer to move downward.
• the actual container is only partially indicated and designated with the letter B.
• the container consists of a so-called laminated paper and has a pre-punched V.
• the pre-punched V should ideally be placed so that it comes to lie exactly concentrically in the opening of the bung-like lower part.
• the pre-cut should in turn be placed so deeply that only the innermost two layers of aluminum foil and polyethylene film remain undamaged.
• the closure device is welded or glued onto this container B made of multilayer laminated paper.
• the bung-like lower part 2 has a flange 21 which is molded onto the lower edge of a cylindrical connecting piece 20.
• This pouring spout 20 has one Internal thread 22 and an external thread 23 and a plurality of retaining cams 24 formed below the external thread 23.
• this piercer 3 is actuated by means of the screw cap 4.
• the screw cap 4 has a driver 44 below its cover surface 40, which engages in a form-fitting manner on the inner wall of the piercer 3. If the piercer 3 is in its lowest position after the first opening, as shown in FIG. 2, the driver is automatically no longer in engagement and does not come into engagement with the piercer 3 even when the closure device is subsequently closed.
• the screw cap 4 also has a guarantee band 45 which is connected to the jacket wall 41 of the screw cap 4 via predetermined breaking points 46. Before the first opening, the retention cams 24 engage between the predetermined breaking points bridges 46 and thus ensure that the screw cap 4 cannot be unscrewed without removing the guarantee strip 4.
• the piercer 3 consists of a cylindrical ring 31, on the lower extension of which one or more cutting elements 33 are formed.
• the two closure devices 1 according to FIGS. 1 and 3 differ.
• each cutting element 33 has a front tip 36 and a cutting edge 37 which directly adjoins the front tip 36 in a straight or inclined manner toward the lower edge of the cylindrical ring.
• FIG. 4 a development of a push-through 3, as used in the closure device 1 according to FIG. 3, is shown enlarged in its embodiment according to the invention.
• the cutting element 33 is formed on the ring 31, which can be seen here in its developed form, on its lower edge.
• the cylindrical ring 31 has an external thread 32.
• the cutting element 33 here essentially has the shape of a sawtooth.
• the directions used for the definition are on the one hand the cutting direction indicated by the arrow S, on the other hand the penetration direction which is shown by the arrow E.
• the cutting element 33 has a tip 36 which is at the front with respect to the cutting direction and which is also at the fore in the penetration direction E.
• this front direction is at the same time the lowest point, that is to say the point which first comes to rest on the laminated film when the container B is cut open.
• This front tip 36 is followed by a cutting edge 37.
• this cutting edge 37 runs from the front Tip 36 exactly perpendicular to the cylindrical ring 31, executed on its lower edge.
• the cutting direction S of the front tip 36 there is a descending flank 35 which is inclined towards the lower edge of the ring 31.
• a perforating tooth 38 is formed on this descending flank 35.
• the laminated paper expands as far as it is not severed with an or several of its layers of plastic film and stretched over the cutting element 33, the film resting on the one hand over the cutting element 33 and on the other hand being drawn to the area of the container B which has not yet been severed. Sooner or later it comes to lie on the tip of the perforating tooth 38 in its tensioned state. The presence of this tension and stretch now pierces the film, now stretched and stretched under tension, much more easily, similarly to the case with an inflated balloon.
• the perforating tooth 38 is less far from the lower edge of the ring 31 with respect to the penetration depth than the front tip 36. With regard to the penetration depth, the perforating tooth 38 is certainly arranged in the front half of the maximum penetration depth. While this is not mandatory, however, the reliability decreases the closer the perforating tooth comes to the ring 31.
• two cutting elements 33 are formed on the piercer 3 with its cylindrical ring 31. These two cutting elements 33 run in front of a deflector 34 in the cutting direction S.
• the embodiment according to FIG. 4 does not show any specified deflector 34, the descending flank 35 can also have the function of a deflector by correspondingly suitable design measures.
• the lower end of the deflector 34 can have a reinforced jacket wall.
• the specific configuration of a deflector, as shown in FIG. 5, certainly represents a more reliable working variant.
• the two cutting elements 33 are followed by the perforating tooth 38. Of course, this could also be formed on the descending flank 35 of the cutting element 33 in the cutting direction his.
• this perforating tooth would have to protrude further from the lower edge of the ring 31 in the penetration direction than the highest point of the following deflector 34 in the penetration direction E.
• the perforating tooth is formed on the deflector 34 and forms the highest point in the penetration direction E.
• the perforating tooth 38 is in turn formed on an elevation 39 of the deflector 34.
• the two embodiments shown here thus show that the cylindrical piercer can be equipped with one as well as with several cutting elements. Of course, it would also be conceivable to provide more than one perforating tooth, for example two of them.
• both perforating teeth 38 would be arranged in the region of the descending flank 35, but at two different heights. It may also make sense to form two such perforating teeth relatively close together.
• a plurality of perforating teeth 38 could again be provided, the perforating teeth being able to be provided, for example, both on the descending flank 35 and on the deflector 34.
• the piercer is provided with more than one cutting element 33, it has been found that the so-called tips 36 of the cutting elements 33 should be arranged at least approximately the same distance from the next, here lower, edge of the ring 31.
• These define a level N, which is shown in dash-dot lines, and the perforating tooth 38 or the perforating teeth 38 should be located between this level and the lower edge of the ring 31.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)
• Cartons (AREA)
• Making Paper Articles (AREA)

Priority Applications (6)

Applications Claiming Priority (2)

Publications (1)

Family

ID=32996989

Family Applications (1)

Country Status (9)

Cited By (14)

Families Citing this family (15)

Citations (3)

Family Cites Families (1)

• 2004
  • 2004-03-15 US US10/549,344 patent/US20060261028A1/en not_active Abandoned
  • 2004-03-15 DE DE502004009610T patent/DE502004009610D1/de not_active Expired - Lifetime
  • 2004-03-15 WO PCT/CH2004/000150 patent/WO2004083055A1/de active Application Filing
  • 2004-03-15 EP EP04720567A patent/EP1608561B1/de not_active Expired - Lifetime
  • 2004-03-15 JP JP2006504155A patent/JP2006520725A/ja active Pending
  • 2004-03-15 AU AU2004222221A patent/AU2004222221A1/en not_active Abandoned
  • 2004-03-15 ZA ZA200507565A patent/ZA200507565B/xx unknown
  • 2004-03-15 AT AT04720567T patent/ATE433920T1/de not_active IP Right Cessation
  • 2004-03-15 RU RU2005132392/12A patent/RU2337864C2/ru not_active IP Right Cessation

Patent Citations (3)

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