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

Definitions

• the invention relates to a sealing device made of plastic with a cutting sleeve according to the preamble of patent claim 1.
• the closing device is particularly suitable for sealed packages which contain a flowable content, preferably a beverage.
• a generic closure device is known from EP 1 088 764.
• This closing device consists of three parts, namely a screw cap, a lower part and a cutting sleeve.
• the lower part is tubular and has on its underside a peripheral flange with which it can be fastened on a beverage pack.
• the rohrformige part forms a spout, which by means of
• Screw cap is closed.
• the cutting sleeve is also tubular and has at its lower end a cutting tooth.
• the cutting sleeve In the unopened state of the pack, the cutting sleeve is located within the lower part and the screw cap is screwed onto the lower part. If the screw cap is now rotated in order to open the closing device, thanks to a driver system, the cutting sleeve also rotates while at the same time moving axially downwards. As a result, the package and in particular the film of the package is cut in a circular manner along a predetermined breaking point. After a predetermined angle of rotation, ie when the package is opened wide enough, the driver engagement between screw cap and cutting sleeve is released.
• the screw cap can be completely removed from the spout and, if necessary, placed on it again in a sealed manner, without the cutting sleeve projecting into the package being moved again.
• the cutting sleeve and the base are molded in one piece in a pre-assembly configuration in which they are secured coaxially to one another by radial connecting bridges. These bridges extend between the upper edge of the cutting sleeve and the underside of the base. These bridges are broken when the cutting sleeve is first pushed into the base.
• a typical composite package includes e.g. a cardboard layer, which is provided to the inside of the package with a thin layer of aluminum, which in turn is provided with a layer of polyethylene (PE).
• PE polyethylene
• packaging has also become increasingly prevalent which no longer has a cardboard layer, but rather is formed from a relatively thick plastic film, in particular pure PE packaging, which is provided with one or more very thin barrier layers.
• the package is usually weakened, eg pre-punched, in the area where the closure is later placed, to allow the cutting sleeve to more easily penetrate the package wall.
• a circular weakening line may be formed in the wall with a smaller wall thickness.
• a weakened area is generally formed by penetrating the cardboard layer as completely as possible in a circular area (for example, by pre-punching it). If this pre-punching is done before the board is coated with the further layers, it sound cut circular disc before coating with the other layers removed.
• the result is a package that has a circular area in the region of the later opening, which consists only of the thin film layers of aluminum and / or plastic, but in which no cardboard is present.
• the cut-out circular disc remains bonded to the foil layers.
• a closure with a self-opening sleeve which has two cutting elements, which are arranged to follow each other and have a triangular basic shape.
• WO 2006/089440 also shows a self-opening sleeve with two triangular cutting teeth.
• WO 2007/030965 discloses a self-opening sleeve having three teeth. Each of these teeth has a triangular basic shape, followed by a stiffening shoulder connects. When two teeth this shoulder in the direction of rotation of the tooth below, on the third tooth this leading formed.
• each of these self-opening sleeves is optimized for a particular type of packaging. Therefore, none of the self-opening closures will provide a satisfactory result in all the above-mentioned types of packaging, but will fail in at least one type of packaging.
• the plastic closure device has a spout part for attachment to a pack, a screw cap which can be screwed onto the spout part and a self-opener sleeve which can be moved downwards in a screw-shaped manner in the spout part in order to open the pack.
• the screw cap has at least one drive element or driver, which acts on at least one stop element of the Diöffherhülse and which causes the first time opening the screw cap moves the self-tapping sleeve within the spout into a lower position toward the package to open it.
• the self-opening sleeve remains in its lower position.
• the self-opening sleeve has at least two downwardly projecting cutting and / or piercing elements, which are arranged on the circumference of the Diöffherhülse and form a lower edge thereof.
• These cutting and / or piercing elements have a substantially rectangular shape.
• a relatively long, downwardly projecting longitudinal edge in the direction of rotation interrupts the rectangular shape and forms a downwardly projecting triangle, so that a projecting tip is formed.
• the longitudinal edge has with respect to the direction of rotation of the sleeve in front a downwardly sloping and then a rising region again, wherein the rising portion is longer and flatter than the sloping portion and inclined with respect to a plane perpendicular to the longitudinal axis at a shallow angle.
• the rising and / or falling area may be straight or curved. It is preferably substantially longer than the rising area and preferably has a length which is at least 2.5 times the length of the rising area.
• the rising area preferably includes an angle of at least 40 °, more preferably about 50 ° to the horizontal (ie to a plane perpendicular to the axis of rotation), while the angle of the sloping area to the horizontal is preferably everywhere less than 30 °, particularly preferably smaller than 20 °. Between the rising area and the sloping area of the longitudinal edge is preferred at the location an obtuse angle, ie an angle of more than 90 degrees, formed.
• the downwardly extending longitudinal edge forms a cutting edge, at least in its rising region, i.
• the self-opening sleeve is formed in this area to the longitudinal edge towards a blade-like tapered. This facilitates the severing of the packaging.
• a cutting edge is formed in the sloping region.
• Film material which elastically spans across the longitudinal edge, is also severed efficiently in this area.
• the cutting edge is preferably formed on an inner peripheral surface of the self-opening sleeve.
• the Dowöfmerhülse preferably tapers towards the longitudinal edge only on its outer circumference, so as to form the cutting edge, while the inner circumference in the region of the longitudinal edge is constant. As a result, the cut material is displaced outwards, which contributes to a clean cut of the cut-out material disc of the package.
• all cutting and / or piercing elements protrude equally far down. In this way they contact the weakening area of the packaging at the same time and perforate it in several places at the same time. Even if perforation is not successful at one point, this ensures safe opening. In addition, in this way a relatively large, uniform pressure exerted on the weakened area, which is particularly advantageous for certain types of packaging.
• the cutting and / or piercing elements (32a-32e) are preferably distributed equidistantly distributed on the circumference.
• the Diöfmerhülse may have at least one hold-down element, which forms with the cutting and / or piercing elements, the lower edge and serves to push the separated material disc of the package down to prevent it hindering the pouring.
• the hold-down element is then trailed in the direction of rotation of the cutting and / or piercing elements.
• the cutting and / or piercing elements are preferably arranged distributed one after the other and equally spaced around the circumference, and the distance from the hold-down element to the first cutting and / or piercing element in the direction of rotation is preferably greater than the spacing of the cutting and piercing elements. and / or piercing elements with each other.
• the self-opening sleeve preferably has three to five, in particular four cutting and / or piercing elements. Without hold-down element, it is advantageous if the Döffherhülse has four to six, in particular five cutting and / or piercing elements. With a smaller number, the force distribution is less uniform, and the material thickness of each individual cutting and / or piercing element must be increased considerably, which impairs the production. A larger number of such elements, in turn, causes each individual element to become smaller, which is also unfavorable in terms of stability. If the number of elements is too large, the compressive force exerted by each element becomes too small, and clean cutting action can no longer be achieved. The optimal number is ultimately the result of a lengthy optimization in view of the different and sometimes contradictory requirements that must be met by the Dowöffherhülse to make it suitable for various types of packaging.
• the Döffherhülse preferably has an external thread, which meshes with an internal thread of the spout, so that the Döffherhülse rotates in their downward movement.
• the pitch of the external thread is preferably chosen so that the self-opening sleeve when unscrewing the screw cap rotates less than 360 degrees, in particular 300 degrees, performs.
• only a single drive element is present on the screw cap.
• only a single stop element is correspondingly present on the Döffherhülse.
• this stop element is located in the area a front in the direction of rotation of the sleeve cutting and / or piercing element.
• it can also be provided more distributed over the circumference arranged stop elements, the driver engages only in one of them.
• the closure device In the case of a single drive element or driver, the closure device is very simple. This minimizes the manufacturing costs. In particular, the closure material can be saved, since the driver system is reduced to an absolute minimum. Thanks to the simple form of the closing device also their production is simplified and the committee on non-quality-compliant closures is relatively low.
• the driver preferably has a driving edge, which extends in the axial direction.
• the Mit supportivekante then preferably has an inclined to the radial direction of the stop surface.
• the driver may be formed zahnf ⁇ rmig, with the vertical driving edge and a back with an angle of inclination of a maximum of 45 °.
• the driver preferably has a height which corresponds approximately to the height of the spout part.
• the abutment member may be a nose projecting from an inner wall of the self-opening sleeve which has an edge extending in the axial direction and which extends only over part of the height of the self-opening sleeve. The nose may then have a rearward grip relative to the radial direction.
• FIG. 1 shows a longitudinal section through a closing device according to a first embodiment in a state before its first use
• FIG. 2 shows the device according to FIG. 1 with the screw cap unscrewed
• Figure 3 is a side view of the device according to Figure 2;
• Figure 4 is a view of the closure according to Figure 2 from below, mounted on a package;
• FIG. 5 shows a longitudinal section through the pouring part and self-adhesive sleeve of the device according to FIG. 1 after its production;
• Figure 6 is a perspective view of the device according to Figure 1 from below;
• Figure 7 is a perspective view of the device according to Figure 1 of the
• Figure 8 is a view of the device according to Figure 1 from below;
• FIG. 1 A first figure.
• FIG. 10 shows a section through A-A according to FIG. 9;
• FIG. 11 shows a longitudinal section through a closure according to the invention in accordance with a second embodiment
• Figure 12 is a perspective view of the closure according to Figure 11 and
• Figure 13 is a view of the closure according to Figure 11 from below, mounted on a package. Ways to carry out the invention
• FIGS. 1 to 10 show an exemplary embodiment of a closing device or the self-opening closure.
• Such closures are applied to packages with flowable content, in particular on beverage cartons with inside film.
• the pack preferably already has a predefined, but still airtight, spout opening in this area.
• the cardboard is already perforated or otherwise weakened, but the underlying film is still intact.
• the device is made of plastic by injection molding, wherein the individual parts can be made of the same or different plastic.
• the device essentially comprises a pouring part 1, a screw cap 2 and a self-opening sleeve 3.
• a guarantee strip 4 is additionally present, which is preferably produced in one piece with the screw cap 2.
• Spout 1 and Döffherhülse 3 are preferably also made in one piece together. However, it is also possible to manufacture these separately.
• the spout part 1 consists essentially of a sleeve-shaped spout 10 with a continuous spout opening and a spout 10 projecting outwardly flange 13 which is integrally formed on a lower end of the spout 10. This flange 13 is welded or otherwise secured to the package so that the spout 10 comes to rest over the predefined spout opening of the package.
• the spout 10 has an external thread 12 and an internal thread 14. In the lower region of the spout 10, above the flange 13, webs 15 are arranged with protruding, undercut retaining lugs 15 ', as described below.
• the screw cap 2 preferably has a cylindrical casing wall 21 and an approximately flat top surface 20. The cap 2 can be screwed by means of an internal thread 22 on the external thread 12 of the spout part 1.
• the mantle wall 21 is connected via predetermined breaking points 23 with the guarantee strip 4.
• a circumferential sealing lip 26 protrudes downward, which in the closed state of the cap 2 rests resiliently against the inside of the pouring spout 10.
• the cap 2 has a single inwardly or downwardly projecting driver 24, which is preferably integrally formed on the inside of the top surface 20.
• the driver 24 preferably has a triangular basic shape, wherein it is formed bent along a concentric to the internal thread 14 circle.
• a driver edge 14 extends in the axial direction, wherein it preferably has a stop surface which is inclined towards the radial direction, ie forms a rear grip.
• a back adjoins in the opening direction of rotation of the cap 2 to the driving edge, the back has an angle of inclination of a maximum of 45 °.
• the height of the driver 24 corresponds approximately to the height of the spout part 1, in particular of the spout 10.
• the Disöffherhülse 3 is hollow cylinder-shaped and has a through opening. It consists essentially of a ring 30 with an external thread 31 and the ring 30 downwardly approximately vertically projecting cutting and / or piercing elements 32a - 32e. These cutting and / or piercing elements 32a-32e are distributed on the circumference of the self-opening sleeve 3 and are arranged at a distance 33 from one another and form a lower edge of the same. Furthermore, at least one hold-down element 35 may be present at this edge. These elements will be described in more detail below.
• the sleeve 3 has at least one, preferably exactly one stop element 36, as can be seen in FIG.
• the stopper member 36 is an inner wall of the
• the nose has an edge extending in the axial direction and which preferably only over a portion of the height of the self opener sleeve 3 extends.
• the nose has a stop surface inclined with respect to the radial direction.
• the nose preferably extends in the region of the external thread 31, wherein the external thread 31 extends over a greater height than the nose.
• the stop element 36 is preferably arranged in the direction of rotation of the sleeve 3 in the region of the first cutting and / or piercing element 32a, wherein it may be arranged in the front or in the rear region thereof or in between.
• the external thread 31 of the sleeve 3 meshes with the internal thread 14 of the pouring part 1, so that the sleeve 3 rotates screw-shaped downward during the first unscrewing of the cap 2 within the pouring spout 10. If the cap 2 is removed, the engagement between driver 24 and stop member 36 dissolves.
• the sleeve 3 now remains in this lower position, even if the cap 2 is replaced and tightened.
• this embodiment has a total of five cutting and / or piercing elements 32a-32e. These are preferably of the same height. These elements are distributed gleichabstieri distributed over the circumference of the sleeve 3.
• They are preferably identically shaped and the same size. They have a substantially rectangular shape, wherein in each case a downwardly projecting longitudinal edge interrupts the rectangular shape. It is inclined, wherein the height of the element in the direction of rotation of the sleeve 3 decreases toward the rear.
• the longitudinal edge is relatively long, so that it is greater than the distances 33 between the elements. Preferably, it is at least twice as long as the distance 33 between them.
• the longitudinal edge is formed relatively blunt, so that the elements act more or exclusively as a pusher or piercer and not as cutting elements.
• FIGS. 11 to 13 they can also be designed as cutting elements without their basic shape having to be substantially changed.
• a longitudinal edge is formed, which initially drops downwards in the direction of rotation of the sleeve 3 and then rises, so that a tip projecting downwards is formed.
• the rising area is formed longer and shallower than the sloping, acting as a cutting edge area.
• the length of the rising area is about three times the length of the sloping area.
• the sloping area has an angle of approx. 50 ° to the horizon zontal (ie to a plane that is perpendicular to the direction of rotation), while the rising area forms an angle of only about 12 ° to the horizontal. Between the rising and falling area an obtuse angle is formed, which in the present case is about 118 °.
• Both the sloping and the rising areas are designed like blades as a cutting edge.
• the self-opening sleeve tapers towards the cutting edge or runs toward the cutting edge in the manner of a blade. In the present case, this taper occurs only on the outside of the self-opening sleeve.
• the inner surface of the self-opening sleeve is cylindrical in the region of the cutting edge. As a result, the cutting edge displaces the cut material outwards during cutting and thus contributes on the one hand to a clean cut.
• a total of four cutting and / or piercing elements 32a-32d are present, which are followed by a single blank holder 35.
• the cutting elements 32 are all the same size and formed the same shape.
• the hold-down 35 is also approximately the same width or long, but has no cutting tip and is thus smaller. The distance from the hold-down element 35 to the first cutting and / or piercing tooth 32 in the direction of rotation is greater than the spacing of the teeth 32 from one another.
• An advantage of these two embodiments is that they no longer need to be positioned accurately on the predefined spout opening. Thanks to their relatively long cutting and / or piercing elements in the direction of rotation of the sleeve 3, they can also contact the section at a distance from the perforation and still apply sufficient pressure to detach the section D from the package. Furthermore, thanks to these elements, a relatively steep thread between the sleeve 3 and spout 10 can be selected, so that a rotation of less than 360 °, in particular of 300 ° is sufficient to open the shutter and press down the section D.
• FIG. 5 shows a possibility of producing such a closure.
• the lid is sprayed separately, the sleeve 3 and the spout part 2 are each but made in one piece.
• the sleeve 3 projects above part of the spout 2 out, being connected via connecting webs 5 with the spout part 2. If the part is injected, then the sleeve 3 is pressed completely into the spout 20, the connecting webs 5 breaking.
• FIGS. 7 to 10 show a preferred embodiment of a first opening indicator. This type of marking can be used not only with this closure but with all closures, which have a spout with flange and a screw on the spout cover.
• a plurality of webs 15 are formed, which are parallel to a tangent to the spout 10 and parallel to each other. Their free ends preferably lie on a common circle, which runs concentrically to the outer circumference of the spout 10.
• the free ends form behind-cut retaining lugs 15 ', as can be seen in FIG.
• the guarantee strip 4 is sprayed onto the cap 2 via predetermined breaking bridges 23, wherein the cap 2 preferably completely surrounds it.
• the retaining webs 40 of the guarantee strip 4 are in engagement with the retaining lugs 15 'and prevent a mutual twisting of the cap 2 and the pouring part 1, as can be seen in FIG.
• the predetermined breaking bridges 23 are released by axial tension and the guarantee strip is completely detached from the cap 2.
• connecting bridges 6 between cap 2 and guarantee strip 4 are still present, which are preferably wider than the webs 23. They are preferably distributed uniformly over the circumference of the cap, as can be seen for example in Figure 8. In the example shown here, there are three such bridges 6, but their number may vary. These bridges facilitate and shorten the injection molding process, since relatively much material can be transported over these bridges. After production of the cap and preferably before assembly of the Finally, these bridges 6 are broken. Preferably, they are cut through with a knife or a laser beam. Such connection bridges can be used in all embodiments. They can also be used for all parts, which are sprayed together. This production method is not limited to the closures according to the invention described here.
• the self-opening sleeve 3 in particular the cutting and piercing elements are possible.
• the number of teeth can also be varied.
• the above-mentioned external and internal threads may be continuous or only partial thread.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
• Scissors And Nippers (AREA)
• Cartons (AREA)
• Moulds For Moulding Plastics Or The Like (AREA)
• Injection Moulding Of Plastics Or The Like (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Publications (2)

Family

ID=39272675

Family Applications (1)

Country Status (11)

Cited By (6)

Families Citing this family (9)

Citations (3)

Family Cites Families (8)

• 2008
  • 2008-01-29 EP EP08700534A patent/EP2125542B1/de not_active Not-in-force
  • 2008-01-29 BR BRPI0806211-0A patent/BRPI0806211A2/pt not_active IP Right Cessation
  • 2008-01-29 CA CA002671882A patent/CA2671882A1/en not_active Abandoned
  • 2008-01-29 WO PCT/CH2008/000029 patent/WO2008092289A2/de active Application Filing
  • 2008-01-29 CN CN2008800014134A patent/CN101578221B/zh not_active Expired - Fee Related
  • 2008-01-29 ES ES08700534T patent/ES2368533T3/es active Active
  • 2008-01-29 AT AT08700534T patent/ATE517036T1/de active
  • 2008-01-29 PL PL08700534T patent/PL2125542T3/pl unknown
  • 2008-01-29 RU RU2009132185/12A patent/RU2437810C2/ru not_active IP Right Cessation
  • 2008-01-29 US US12/518,590 patent/US20100018992A1/en not_active Abandoned
• 2009
  • 2009-06-14 IL IL199343A patent/IL199343A/en not_active IP Right Cessation

Patent Citations (3)

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