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 for attachment to a closed container made of plastic film material, consisting of a lower part with a cylindrical spout and a flange for attachment to the container and a screw cap which is screwed on the lower part, and a cylindrical piercing with external thread, which is open on both sides in the axial direction and runs in the spout of the lower part in the internal thread, wherein means are provided in the screw cap, the screw at the first screw movement of the screw through the screw down, and that the cylindrical piercer on the cylindrical wall, on End which is directed to the container wall, has cutting teeth.
• Closure device of the type mentioned above have been attached to today only made of laminated film material containers. These laminated films have at least three layers of different materials. On the one hand, such a material consists of one Cardboard layer, which gives the container the required rigidity, an aluminum layer which serves as aroma barrier and a plastic layer which guarantees the required tightness. In order to cut through these three layers, the corresponding piercer of a closing device mentioned at the beginning has to fulfill different functions. In order to sever the paperboard layer, a plurality of saw teeth are often suggested, while a raised tooth with a front cutting edge cuts through the aluminum layer while a perforating tooth pierces the plastic layer before the aforesaid cutting edge can further cut the plastic film.
• the separation of the cardboard layer is a problem, especially if the serving for supporting partial punching that at least partially cuts through the cardboard layer does not match exactly with the cutting line of the piercer, so either the teeth are too weak or in the case of a large number of teeth, the cardboard material comes between the teeth and these can barely produce a perforated effect thereafter.
• the present invention is a closure device which is applied to a pure plastic film material.
• the container bag When using the closure device of the type mentioned, the container bag remains completely closed until the time of the first opening. This gives an increased shelf life.
• the plastic film is much more robust and designed with a higher wall thickness than the very thin plastic film layer in a laminated film. This results in other requirements for the closing device.
• Piercers such as those of US-A-5020690 or US-A-5141133 have a plurality of teeth. These adjacent teeth form virtually the shape of an annular saw blade. Such solutions have either resulted in a rondelle being completely cut out and dropped into the container or that due to the toughness of the foil individual teeth have broken off and fallen into the container. If it is the case here for containers for drinks, so this is completely unacceptable.
• the Applicant has made experiments, with a piercer according to WO2007 / 030965 in which three teeth distributed over the circumference and minimally offset from a uniform distribution over the circumference, are present. While piercers of this type have been proven many times, there are always cases in which either the film has been completely cut out and the corresponding roundel in the container much, or in other cases, the films have been cut approximately equidistant only in three places and the film remained hang over the opening. From these findings, the applicant has sought in elaborate experiments an optimization that reliably realizes an opening cut, so that a stuck with the container in connection flap-like rondel gets stuck, which is pushed through the teeth from the open area of the piercer.
• a closure device of the type mentioned which is characterized in that the piercer has exactly two equal teeth, both of which are arranged within an angular range of 70 to 120 ° of the circumference.
• This causes the plastic film to be cut to be pre-tensioned by the two teeth and at the same time perforate and cut the film at the same time, and after a short distance into the cutting area of the follower tooth Front tooth comes and thus becomes ineffective. If the perforation of the film follows practically immediately at the first contact, the film can nevertheless not be cut out in a completely circular manner and thus no plastic film rondel falls into the container.
• the closure device according to the invention is applied to a container of pure plastic film material.
• This single or multi-ply plastic film is substantially thicker than the plastic film which is used as a sealant layer in the composite film of various materials.
• Figure 1 shows the closed plastic closure before the first use of a
• FIG. 3 shows a simplified representation of FIG
• Figure 4 shows the piercer and the lower part with flange as a one-piece semi-finished product before assembly, turn in
• Figure 5 the same view rotated by 180 °.
• Figures 6a-6c show various sectional images.
• Figure 7 shows a suitable for harder plastic films piercing with two offset by an angle teeth with others
• Figure 8 the same piercer rotated by 120 °.
• Figure 9 shows a load-time diagram for the
• the plastic closure device is designated overall by 1. This comprises three components, two of which can be produced in one piece in terms of manufacturing technology, as described below and illustrated in FIGS. 4 and 5.
• the plastic closure device 1 has a screw cap 4, at the lower edge in alignment with the jacket wall of the screw cap, a guarantee strip 7 is formed via predetermined breaking point bridges 8. In the side view according to FIG. 1, only one flange 3, which is part of the lower part 2, of the closure device 1 can be seen.
• the screw cap 4 has a jacket wall 9, as well as a cover surface 10.
• the screw cap 4 has an internal thread 11 designed as a fine thread.
• the lower part 2 with its flange 3, which serves the welding or adhesive bond with the container, has a cylindrical spout 6, which is tubular and open on both sides.
• This spout 6 has an external thread 12 that is also designed as a fine thread and when screwing and unscrewing the screw cap 4 with the internal thread 11 of the screw cap 4 meshes.
• the fine thread 11, 12 is preferably designed as a double-threaded thread.
• the fine thread has the advantage of easy assembly by the internal thread of the screw cap can be pushed ratchet-like over the external thread 12 of the spout 6. This allows mounting without relative rotation of the parts to each other.
• two diametrically opposed drivers 13 are present, which are integrally formed on the underside of the top surface 10 of the screw cap 4. These drivers 13 act together with driver 14 in Piercing 5. This piercing 5 is described in detail below with reference to Figures 4 and 5.
• the piercer 5 and the lower part 2 are produced in one piece, as shown in FIG.
• the lower part 2 and the piercer 5 together form a semi-finished product which can be produced by means of a single injection mold.
• the piercer 5 is completely within the cylindrical spout 6 to lie.
• the piercer 5 is formed over predetermined breaking points 15 at the upper edge of the spout 6.
• the piercer 5 consists of a cylindrical tube section 16, the outside has a coarse thread 17. This coarse thread 17 with a large pitch, meshes with a suitably adapted trapezoidal thread 18 on the inside of the spout 6.
• the piercer 5 also has two diametrically opposed driving rib 19, to which the previously mentioned driver 13 of the screw 4 at the corresponding screwing come to the concern.
• two cutting teeth are formed, of which both are visible in Figure 2, while in Figure 5, only the trailing tooth is visible, while the leading tooth is cut away.
• the leading tooth is designated by 20 and the trailing tooth by 21.
• Both teeth 20, 21 have the same length 1. This length refers to the vertical distance from the lower edge 22 of the cylindrical tube section 16 to the tip 23 of the corresponding cutting tooth.
• the piercer 5 moves in the opposite direction in the axial direction, the piercer performs a much larger translational vertical path per revolution, as the screw cap 4 in the opposite direction. In fact, the piercer 5 performs at most a rotational movement of about 330 °, while the screw cap performs one or more passages until complete unscrewing.
• the piercer 5 with a view of the teeth in the direction of the axis of rotation of the cylindrical pipe section 16 is shown. If one draws radii from the two tooth tips to the center of the longitudinal axis, an angle CC forms between them. This angle CC must be within an angular range between 70 ° and 120 °. In addition, it is advantageous if one chooses the external thread of the penetrator 5 and the internal thread 18 of the spout 6 so steep that during the unscrewing movement of the screw cap 4, the cutting teeth 20, 21 in the cutting direction from the point of contact on the plastic film to be cut through the container until complete completed Abschraubterrorism the screw cap 4, a maximum cutting path of 210 ° passes.
• the leading tooth 20 and the trailing cutting tooth 21 include each other, namely an angle of 120 ° thereto, this results in one maximum cutting line extending over 330 °. This leaves a sufficient connection between the plastic film of the container and the mentioned tab L.
• the perforation of the film takes place and the angle between the two cutting teeth only 70 ° is, so the front tooth still performs a minimum cutting line of 120 °, while the trailing tooth 21 through the additional 70 °, so even in the worst case, a cutting line of more than 180 ° is formed.
• plastic films are available in many different qualities. They differ not only in the choice of the plastics used, but also in the thickness, the toughness, in the hardness and so on.
• the one comparable To have strength such as those of multilayer laminates with cardboard Hessen not open reliably with the previously known plastic thinning devices such plastic films. The tighter the film used was the greater the wall thickness of the teeth had to be and thus Hessen then hardly open the slides without too high a torque was required, which is not reasonable for the users.
• tubular bag as a whole made of these relatively thick and hard material, but punched therein an opening and closed this opening with a film section, which was much softer and for cutting with the usual plastic shuttering devices was possible, which was then welded onto the film section is.
• the piercer itself is denoted overall by 5.
• This also has a cylindrical tube section 16 on the outside of a coarse thread 17 is formed. In this coarse thread then engages the trapezoidal thread 18 in the cylindrical spout 6 a.
• the cylindrical portion 16 is provided on the inside with driving ribs 19.
• the cylindrical portion 16 is reduced in diameter in this variant in the lower, cutting region 26 in diameter by approximately the depth of the coarse thread 17. At the lower edge of this tapered cutting region 26, in turn, a leading cutting tooth 20 and a trailing cutting tooth 21 is provided.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)
• Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=42799681

Family Applications (1)

Country Status (5)

Cited By (1)

Families Citing this family (10)

Family Cites Families (16)

• 2009
  • 2009-09-29 DE DE102009045124A patent/DE102009045124A1/de not_active Withdrawn
• 2010
  • 2010-09-15 CN CN2010800434528A patent/CN102548852A/zh active Pending
  • 2010-09-15 WO PCT/EP2010/063560 patent/WO2011039054A1/de active Application Filing
  • 2010-09-15 US US13/499,066 patent/US20120241471A1/en not_active Abandoned
  • 2010-09-15 EP EP10752834A patent/EP2483170A1/de not_active Ceased

Non-Patent Citations (1)

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