US20080083694A1 - Method For Peeling Off Or Separating A Sealing Film Sealed Onto The Rim Of The Neck Of A Bottle Or The Like And Screw Cap For Carrying Out Said Method - Google Patents

Method For Peeling Off Or Separating A Sealing Film Sealed Onto The Rim Of The Neck Of A Bottle Or The Like And Screw Cap For Carrying Out Said Method Download PDF

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Publication number
US20080083694A1
US20080083694A1 US11/571,401 US57140105A US2008083694A1 US 20080083694 A1 US20080083694 A1 US 20080083694A1 US 57140105 A US57140105 A US 57140105A US 2008083694 A1 US2008083694 A1 US 2008083694A1
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United States
Prior art keywords
neck
screw cap
sealing film
rim
detachment
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Abandoned
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US11/571,401
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English (en)
Inventor
Rainer Ammann
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Individual
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Individual
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    • 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
    • B65D51/00—Closures not otherwise provided for
    • B65D51/18—Arrangements of closures with protective outer cap-like covers or of two or more co-operating closures
    • B65D51/20—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing
    • B65D51/22—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing having means for piercing, cutting, or tearing the inner closure
    • B65D51/228—Caps, lids, or covers co-operating with an inner closure arranged to be opened by piercing, cutting, or tearing having means for piercing, cutting, or tearing the inner closure a major part of the inner closure being removed from the container after the opening
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0015—Upper closure of the 41-type
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/0093—Membrane

Definitions

  • the invention relates to a method for the at least partial detachment or separation of a sealing film or foil that is sealingly attached to a rim of a neck of a container, vessel, bottle, or the like, which rim has a circular sealing surface and the neck has an male thread and a center axis, and a screw cap having a female thread complementary to the male thread and capable of being screwed down onto the male thread of the neck sealed in the aforementioned manner and the cap can be unscrewed at any later point in time, as desired.
  • the invention further relates to a screw cap for the implementation of this method.
  • aluminum foils that have a coating of, for example, HDPE (high duty polyethylene) or a similar material on their sealing side are used for standard plastics material bottles made of, for example, polyethylene (PE) or polyethylene terephthalate (PET).
  • PE polyethylene
  • PET polyethylene terephthalate
  • a screw cap is screwed down to protect the sealing film, and the user then loosens or peels off this film by hand after unscrewing the screw cap and pulling off any originality seal ring that may be present, on the screw cap in order to allow access to the contents of the container.
  • the bottle with its remaining contents can then be resealed by screwing the screw cap back on.
  • the object forming the basis of the invention can thus be regarded as comprising the creation of a method, and also a screw cap for the implementation of said method, in which it is no longer necessary to grasp the sealing film and peel it off by hand once the screw cap has been unscrewed.
  • means can be provided for storing the detached sealing film within the screw cap.
  • the process of unscrewing the screw cap thus includes the detachment of the sealing film from the rim of the container or the bottle and, if appropriate, subsequent storage of the sealing film in the screw cap, which cap can then be screwed onto, or unscrewed from, the neck in the usual manner a number of times, as required, until the contents of the container have been consumed due to removal thereof each time. Separate detachment of the sealing film by hand is thus no longer necessary.
  • a reinforcement disk coated on one side with an adhesive can advantageously be inserted into the screw cap and, when the cap is subsequently screwed onto the neck, said disk will be pressed with its adhesive against the sealing film that is sealingly attached to the rim of the neck, in which case a surface-to-surface bonding of the reinforcement disk with the sealing film is achieved after the cap has been screwed down.
  • Advantageous reinforcement of the generally rather thin and flexible sealing film is thus achieved, which in turn enables the screw top to grip the sealing film more easily.
  • reinforcement of the sealing film may be achieved by using a sealing film which has already been reinforced by a surface-to-surface bonded reinforcement disk, or a sealing film that has been stiffened or is resistant to bending.
  • a glue, lamination, or sealing wax composed of, say, PE, PET, polyester, or polystyrene, or a combination of these substances, may be used as an adhesive on that surface of the reinforcement disk which faces the sealing film.
  • a screw cap for the implementation of the method of the invention has a top section and also a sleeve section having a female thread and an open end to enable screwing of the cap onto, and unscrewing thereof from, a male thread of a neck having a rim of, say, a bottle, which is hermetically sealed by a sealing film having a radially overlapping circumferential zone and which is sealingly attached to a circular sealing surface of the rim of the neck, and which is capable of being detached and/or destroyed in order to expose the contents of the bottle.
  • the screw cap and thus a first device solution according to the aforementioned object, is characterized by having at least one detachment knife disposed on the sleeve section between the female thread and the top section and along the inside periphery of the sleeve section, which knife, in its starting position prior to screwing down the screw cap, extends obliquely toward the open end of the screw cap and inwardly toward the center axis of the neck or of the screw cap, wherein the distance of the detachment knife from the center axis prior to screwing down is less than the outside diameter of the rim of the neck, which detachment knife is resiliently displaced as the screw cap is screwed down onto the neck of the bottle, and, due to the pressure imposed by the rim of the neck and the circumferential zone of the sealing film, the detachment knife with its knife edge resiliently bends upwardly and comes to rest on the outer periphery of the neck above the male thread and beneath the radially overlapping circumfer
  • the screw cap of the invention detaches the sealing film that has been sealingly attached to the exposed rim of the neck of the bottle or the like in that the detachment knife progressively penetrates inwardly between the rim of the neck of the bottle and the sealing film, if necessary to beyond the inside diameter of the neck, toward the center axis of the neck, and entrains the sealing film after detachment thereof, and the separated sealing film is held firmly between the detachment knife and the top section.
  • a plurality of individual detachment knives is fixed to the sleeve section and distributed around the inside periphery of the sleeve section in the circumferential or rotational direction, which knives, being disposed radially about the center axis in a common plane, leave a clearance in the zone of the center axis which has a smaller diameter than that of the annular region of the sealing film, or than the outside diameter of the rim of the neck of the bottle or the like.
  • the detachment knife only partially severs the sealing film by its spiral cutting action, while the remainder of the film is simply removed or torn off on account of the tension exerted on the sealing surface of the sealing film when the circumferential zone of the sealing film is further raised as the cap is progressively unscrewed.
  • Each individual detachment knife advantageously has a knife edge that partially extends in the unscrewing direction and that in each case effects a spiral movement producing an inward incision at the sealing surface between the sealing film and the rim of the neck.
  • Each knife edge can advantageously be concavely curved and have a radially projecting, pointed cutting projection trailing in the rotational unscrewing direction, which favors penetration at the sealing surface.
  • At least one circular pressure lip is formed on the inside of the top section of the screw cap, disposed about the center axis opposite to the circumference of the sealing film with its reinforcement disk, if present, which lip presses the circumferential zone of the sealing film and the reinforcement disk, if present, onto the rim of the neck and nestles thereon as the screw cap is screwed down.
  • the at least one detachment knife then becomes increasingly erect from the rim of the neck of the bottle or the like as the cap is progressively unscrewed, it can usually return to the position that it originally had prior to the cap being screwed down, namely extending obliquely toward the open end and toward the center of the cap.
  • detachment knife it can be configured to extend around the inside periphery of the sleeve section, in other words as an annular knife.
  • the elasticity of the screw cap material provides the necessary deflectability of this annular knife toward the center axis.
  • the alignment of the at least one detachment knife described above such that it extends in its initial position obliquely toward the open end and inwardly toward the center axis, of the cap is not obligatory.
  • the alignment can alternatively be achieved by designing the knife shape, on the one hand, and connecting it to the sleeve section along the inside periphery thereof, on the other hand, such that the at least one detachment knife extends obliquely upwardly toward the top section and inwardly toward the center axis, of the screw cap.
  • the at least one detachment knife already has substantially the alignment required for the process of severing the sealing film from the neck.
  • the aforementioned object is also achieved with a method of the aforementioned type in a second embodiment of the invention, wherein an intermediate layer of a glue and/or sealing wax is introduced between the top section and the neck before the screw cap is screwed down onto the neck of the container or the like, the intermediate layer being pressed onto the sealing film by the inside surface of the top section as the screw cap is screwed down onto the neck of the container, and the inside surface is glued or welded to the surface of the sealing film in such a way that the sealing film firmly adheres to the inside surface and the sealing film is at least partially entrained by the screw cap when the latter is unscrewed from the neck of the container or the bottle.
  • the container is thus completely or at least partially opened so that the contents thereof can be removed.
  • the sealing film advantageously has, at least at certain points, embossments or perforations configured as breaking points in the circumferential direction within the clearance of the neck, and with the aid of the intermediate layer, the inside surface of the top section is only glued or welded to the surface of the sealing film in the region of the surface surrounded by the embossments or perforations.
  • a disk consisting of at least two layers is advantageously used as a sealing film, wherein the layer facing the inside surface of the top section can be composed substantially of PE, PET, or aluminum and the layer facing the neck can be composed substantially of PE, PET, or sealing wax, or a combination of the aforementioned substances.
  • the construction can be such that only the layer of the sealing film facing the inside surface of the top section is embossed or perforated, at least at certain points, within the clearance of the neck.
  • a preferred screw cap for the implementation of the method of this second embodiment of the invention and thus a second device solution of the aforementioned object according to the invention comprises a top section and a sleeve section having a female thread and an open end for screwing onto, and unscrewing from, a male thread of a neck with a rim of a bottle or the like, which is hermetically sealed with a sealing film that is sealingly attached to a circular sealing surface of the rim of the neck, is characterized according to the invention in that the top section has an inverted, anvil-like, inner, plate-like projection facing its inside surface, so configured that the inside surface is capable of being reliably positioned on the surface of the sealing film when the screw cap is screwed down onto the neck of the container or the like.
  • the vessel, container, bottle, or the like used can be composed of glass or plastics material or the like.
  • the sealing film especially when made of aluminum and/or plastics material, has a circumferential zone radially overlapping the rim of the neck.
  • the resulting circumferential zone forms an additional guide for the detachment knife or knives and forms, as it were, a barrier forbidding intrusion into the top space of the screw cap, particularly when the pressure lip, if present, is raised as the screw cap is unscrewed to progressively expose such a circumferential zone, against which it had formerly nestled, in such a way that the at least one detachment knife bearing against the circumferential zone is then guided below the circumferential zone toward the sealing surface.
  • the screw cap of the invention is made of made of plastics material.
  • FIG. 1 shows a side view of a first embodiment of a screw cap of the invention prior to placement thereof on the neck of a bottle and prior to it being screwed down onto the neck, in a partially cutaway side view of the screw cap and of the neck;
  • FIG. 2 shows a view according to FIG. 1 of a position after starting to screw the screw cap onto the neck of the bottle in which the knife edge of a detachment knife is just touching the surface of the sealing film on the rim of the neck;
  • FIG. 3 shows the screw cap according to FIG. 2 in a middle screwed-down position, in which the detachment knife is resting in a substantially horizontal position on the sealing film;
  • FIG. 4 shows the screw cap according to FIG. 3 screwed down beyond the middle position in which the detachment knife, however, is not yet completely bent upwards;
  • FIG. 5 shows the screw cap according to the previous figures in the final, fully tightened position, in which the detachment knife is also in a final, erect position and a pressure lip disposed on the inside of the top section of the screw cap has positioned itself on the sealing film under resilient deformation;
  • FIG. 6 shows a detail of FIG. 5 on an enlarged scale
  • FIG. 7 shows the screw cap according to FIG. 5 after unscrewing has commenced, in a position at which the knife edge of the detachment knife has started to penetrate between the rim of the container and the sealing film;
  • FIG. 8 shows the screw cap according to FIG. 7 after further unscrewing, in a position in which the detachment knife has already partially penetrated the sealing surface
  • FIG. 9 shows the screw cap according to the previous figures after further unscrewing, in a position in which the detachment knife is in a substantially horizontal position and has already detached the sealing film;
  • FIG. 10 shows the arrangement of the screw cap of the previous figures after removal thereof from the neck of the container, with the sealing film detached and retained in the screw cap by the detachment knife;
  • FIG. 11 is a bottom view of the screw cap in the direction X indicated by the arrow in FIG. 10 ;
  • FIG. 12 shows a screw cap according to the previous figures, in which a reinforcement disk is being force fitted with a plunger.
  • FIG. 13 shows a second embodiment of the invention with a modified screw cap in a side view corresponding to FIG. 1 ;
  • FIG. 14 is a top view of the screw cap according to FIG. 13 , partially cut away along the line XX-XX;
  • FIG. 15 is a sectional drawing of the sealing film according to FIGS. 13 and 14 ;
  • FIG. 16 is a longitudinal section of another embodiment of the screw cap of the invention in which the turns of the female thread have gaps in the region of the detachment knives for the accommodation of the detachment knives during the demolding process.
  • the shoulder zone 2 of a bottle 1 with a neck 3 is shown in FIG. 1 , which shoulder zone has a male thread 4 and a center axis 5 .
  • a screw cap 7 having a female thread 6 is shown, which screw cap, like the bottle, can be made, say, of a plastics material such as PE or PET.
  • the screw cap 7 has a top section 8 , and a sleeve section 9 that has a female thread 6 and a open end 10 so that it is capable of being screwed down onto, and unscrewed from, the male thread 4 on the neck 3 of the bottle 1 , which neck has a rim 11 .
  • the neck 3 is hermetically sealed by a sealing film 14 having a radially overlapping circumferential zone 13 , which is sealingly attached to an annular sealing surface 12 ( FIG. 10 ) of the rim 11 of the neck 3 .
  • the sealing film 14 is capable of being detached and/or destroyed in order to allow access to the respective contents of the bottle.
  • At least one detachment knife 15 is provided, which knife is disposed between the female thread 6 and the top section 8 at the inside periphery 9 ′ of the sleeve section 9 , and, in the starting position shown in FIG. 1 , extends radially and obliquely toward the open end 10 and inwardly toward the center axis 5 and which has a knife edge 16 disposed at a distance from the center axis 5 of the neck 3 of the bottle 1 which is smaller than the outside diameter D of the rim 11 of the neck 3 before the cap is screwed down.
  • the screw cap 7 When the screw cap 7 is screwed down onto the neck 3 of the bottle 1 , it will arrive at a position, as shown in FIG. 2 , at which it is sufficiently screwed down onto the neck 3 for the knife edge 16 to touch the surface of the sealing film 14 .
  • the detachment knife 15 As the cap is tightened, the detachment knife 15 will be elastically displaced in an upward direction, as shown in FIG. 3 , in which the detachment knife 15 is shown as being in a substantially horizontal position. Further tightening of the screw cap causes the detachment knife 15 , as in FIG.
  • the detachment knife 15 with its knife edge 16 will have moved resiliently to an oblique erect position as a consequence of the pressure exerted by the rim 11 of the neck 3 via the circumferential zone 13 of the sealing film 14 .
  • the detachment knife 15 resiliently deformed and under spring tension, comes into position on the outer periphery 17 of the bottleneck 3 above the male thread 4 and below the radially overlapping circumferential zone 13 of the sealing film 14 . Its final position is also discernible in FIG. 5 .
  • This final position shown in FIG. 5 is such that, as the screw cap 7 is unscrewed, the sealing film 14 will be progressively detached and stored in the screw cap 7 between the detachment knife 15 and the top section 8 due to the action of the knife edge 16 of the detachment knife 15 , which circumferentially penetrates between the overlapping circumference 13 of the sealing film 14 and the rim 11 of the neck 3 of the bottle 1 , and initially extends obliquely toward the sealing film 14 and toward the center axis 5 , and then, due to its continual springback action, penetrates more and more radially inwardly toward the center axis 5 .
  • the commencement of the action of the knife edges 16 on the sealing surface between the rim 11 or its sealing surface 12 and the sealing film 14 is shown in FIG. 7 .
  • a plurality of individual, single knives 15 distributed along the inside periphery 9 ′ of the sleeve section 9 in the circumferential or screwing direction (double arrow A) and firmly attached to the sleeve section 9 , which knives leave a clearance W in a two-dimensional radial position in a common plane in the zone of the center axis 5 , as shown in FIG. 3 , which clearance has the same diameter as, or a diameter smaller than that of, the circular sealing surface 12 of the rim 11 of the neck 3 of the bottle 1 or the like.
  • the clearance W of the single knives 15 is equal to the inside diameter of the rim 11 of the neck 3 .
  • three detachment knives are provided in this case.
  • the invention is not limited to the three detachment knives 15 shown in FIG. 11 , and that, in fact, the number of detachment knives 15 can be varied depending on the materials used for the sealing film 14 and its mode of attachment to the sealing surface 12 of the neck 3 .
  • detachment knife 15 When there is only one detachment knife 15 , it can be circumferentially configured around the inside periphery 9 ′ of the sleeve section 9 , ie, as an annular knife (not shown), in which case the elasticity of the material of the screw cap 7 and that of the annular knife will provide the necessary deflectability of the latter toward the center axis 5 .
  • concavely curved knife edges 19 have been employed in the embodiment shown in FIG. 11 , which knife edges have a radially projecting, pointed cutting projection 20 that is trailed in the unscrewing, rotational direction B so that the knife edges 19 extend partially in the unscrewing direction A or have a component that points in the unscrewing direction A.
  • This design would appear to be suitable for facilitating the transaction of the sealing surface.
  • a pressure lip 23 circumferentially disposed about the center axis 5 and the sealing surface 12 and thus also disposed opposite to the sealing film 14 , for which a reinforcement disk 22 is employed in this embodiment, is formed on the inside surface 21 of the top section 8 of the screw cap 7 , which lip presses the circumferential zone 13 of the sealing film 14 and said reinforcement disk 22 against the rim 11 of the neck 3 such that it nestles against the rim.
  • the pressure lip 23 initially remains in partial contact with the upper surface of the sealing film 14 or the reinforcement disk 22 before it detaches itself completely from the sealing film 14 or the reinforcement disk 22 as the screw cap 7 is progressively unscrewed.
  • a reinforcement disk 22 can also be attached flush with the upper surface of the sealing film 14 prior to sealing, for example, by welding with a thermoplastic compound or by gluing, in other words before the sealing film 14 is sealingly attached to the sealing surface 12 of the rim 11 of the neck 3 of the bottle 1 .
  • a reinforcement disk 22 is advantageously inserted in a screw cap according to FIG. 12 and pressed in place with a plunger 24 past the detachment knives 15 toward the top section 8 .
  • the screw cap 7 with the stiffening or reinforcing disk 22 held in place by the detachment knives 15 , ultimately assumes the position shown in FIGS. 1 and 2 .
  • the knife edges 16 initially nudge into the region below the circumferential zone 13 of the sealing film 14 and thus raise the latter together with the edge of the superimposed reinforcement disk 22 , as illustrated in FIG. 7 .
  • this process is facilitated in the preferred embodiment shown in that a concave fillet 25 designed to fit around the rounded edge of the rim 11 of the neck 3 is provided on that side of the erect detachment knives 15 which face the neck 3 , while on the other hand those regions of the detachment knives 15 near to the knife edges 16 are rounded on the side remote from the neck 3 .
  • the zones of the detachment knives adjacent to the knife edges 16 are always curved, thus favoring the penetration of the knife edges 16 .
  • the pressure lip 23 which initially exerted pressure against the entire zone 26 indicated by dots ( FIG. 6 ), partially lifts from the surface of the edge of the sealing film 14 , ie, in the case illustrated here, outwardly from the edge of the reinforcement disk 22 .
  • the knife edges 16 As the cap is unscrewed further, the knife edges 16 , due to the elastic bending of the knife edges 16 , penetrate into the region of the sealing surface 12 which is also indicated by dots in FIG. 6 , cf FIG. 8 .
  • the detachment knives 15 when the position shown in FIG. 9 has been attained, have pushed their way along the entire sealing surface 12 and have completely detached the sealing film 14 with the reinforcement disk 22 . Because the detachment knives 15 have a tendency to spring back to their initial positions occupied on the neck 3 prior to screwing down the screw cap 7 , the situation illustrated in FIG. 10 with the detached sealing film 14 plus the reinforcement disk 22 within the removed screw cap 7 is achieved.
  • FIGS. 13 to 15 A second embodiment of the invention is illustrated in FIGS. 13 to 15 .
  • the parts corresponding to those of the first embodiment are designated by the same reference numerals.
  • This embodiment also relates to a method for the at least partial removal or detachment of a sealing film or foil 14 ′, in particular a film or foil composed of aluminum and/or plastics material, sealingly attached to a rim 11 of a neck 3 of a container, especially a bottle 1 or similar container made of plastics material, glass, or the like, wherein the rim 11 has a circular sealing surface 12 , the neck 3 has a male thread 4 and a center axis 5 , and wherein a screw cap ( 7 ′) having a female thread ( 6 ) complementary to the male thread ( 4 ) is screwed down onto the male thread ( 4 ) on the neck ( 3 ) sealed in the aforementioned manner, the cap being unscrewed at a later date as required.
  • a sealing film or foil 14 ′ in particular a film or foil composed of aluminum and/or plastics material
  • an intermediate layer 33 consisting of a thermoplastic compound, a glue, and/or a sealing wax is introduced between the top section 8 ′ or the inner surface 21 thereof and the sealing film 14 ′ prior to screwing down the screw cap 7 ′ onto the neck 3 of the container or the bottle 1 .
  • the intermediate layer 25 is pressed onto the sealing film 14 ′ by the inner surface 21 of the top section 8 ′ and the inner surface 21 is then welded or glued to the surface of the sealing film 14 ′ in such a way that the sealing film 14 ′ adheres tightly to the inner surface 21 and, as a consequence of such adhesion, the sealing film 14 ′ is at least partially entrained by the screw cap 7 ′ when the screw cap 7 ′ is unscrewed from the neck 3 of the container or bottle 1 .
  • a sealing film 14 ′ having embossments or perforations configured as breaking points disposed at least at certain points in a circumferential direction within the clearance W of the neck 3 is advantageously used, the inner surface 21 of the top section 8 ′ only being glued or welded to the surface of the sealing film 14 ′ in the region of the surface 32 surrounded by the embossments or perforations 28 .
  • embossments or perforations considerably reduce the effort needed to tear the sealing film 14 ′ when unscrewing the screw cap 7 ′.
  • a disk 31 ( FIG. 15 ) is used as a sealing film 14 ′ in this exemplary embodiment, the disk being constructed of two layers 26 and 27 .
  • the layer 26 facing the inner surface 21 of the top section 8 ′ can be composed of PE, PET, or aluminum and the layer 27 facing the neck 3 can be composed of PE, PET, or sealing wax.
  • the layer 26 of the sealing film 14 ′ that faces the top section 8 ′ is embossed or perforated at its circumference (double arrow Z, FIG. 14 ), at least at certain points, within the clearance W of the neck 3 .
  • perforation ( 28 ) in the preferred exemplary embodiment illustrated follows a circular line around the circumference.
  • a screw cap 7 ′ for the implementation of the method described according to this second embodiment, which is also especially one composed of plastics material, there is a top section 8 ′ and a sleeve section 9 ′, the sleeve section having a female thread 6 and an open end 10 for screwing onto, and unscrewing from, a male thread 4 of a neck 3 of a bottle 1 or similar container composed of plastics material, glass or the like, the neck 3 having a rim 11 , which is hermetically sealed with a sealing film 14 ′ sealingly attached to a circular sealing surface 12 of the rim 11 of the neck 3 of the container 1 , which sealing film is capable of being detached or destroyed to allow access to the contents of the bottle, and the top section 8 ′ of the invention has an inverted, anvil-like, inner, plate-like projection 32 that extends toward the inner surface 21 and is configured in such a way that the intermediate layer 33 can be pressed into position on the surface of the sealing film 14 ′ when the screw cap 7 ′ is screw
  • the female thread 6 can be configured as a triple thread.
  • FIG. 16 shows another embodiment of the invention involving a screw cap 70 .
  • the degree of lift between the screw cap 7 , 70 and the neck 3 given by the thread pitch and the mating of a male thread 4 with a female thread 6 used is, in the fully screwed position of the screw cap 7 , 70 on the container 1 , at least equal to the length of the detachment knife or knives 15 , this length in turn being at least equal to the radial distance between the inside periphery 9 ′ of the sleeve section 9 , from which the detachment knife 15 projects outwardly, and an imaginary circle on the sealing surface 12 between the sealing film 14 and the rim 11 .
  • the circumference of the imaginary circle is formed by the inside periphery of the rim 11 of the neck 3 in such a way that the at least one detachment knife 15 always completely detaches the sealing surface 12 .
  • this is in no way obligatory.
  • the at least one detachment knife 15 is disposed on the inside periphery 9 ′ of the sleeve section 9 above the female thread 6 and remote from the top section 8 , and the thread path of the female thread 6 has gaps 71 , the width u of which is substantially equal to, or slightly greater than, the width of the detachment knife 15 or detachment knives in the circumferential direction of the inside periphery 9 ′, so that when the screw cap 70 is removed from the mold (not shown), the at least one detachment knife 15 can be pressed downwardly into the gaps 71 and remain briefly therein until they emerge from the mold and are exposed.
  • This design involving the gaps 71 permits considerable shortening of the height of the screw cap 70 and consequently a saving of plastics construction material, because the detachment knives 15 can be disposed in greater proximity to the female thread 6 , which simultaneously avoids problems concerning the removal of the screw cap 70 from the mold in which it was injection-molded, especially in the case of the preferred use of plastics materials. Without the gaps 71 , the height of a screw cap would inevitably have to be greater, because the detachment knives 15 inevitably bend downwardly when the cap is removed from the mold, and without the gaps the only place where the detachment knives could be accommodated would be in the space above the threads.
  • the detachment knife 15 or each of the detachment knives used always has a free end provided with a knife edge, which end is curved or bent toward the rim 11 when the sealing surface 12 is penetrated between the sealing film 14 and the rim 11 (this can be discerned particularly clearly from FIGS. 3 and 6 ).
  • This favors the penetration of the knife edge(s) 19 between the sealing film 14 and the rim 11 , not only when the sealing film 14 , which in particular is advantageously composed of aluminum and/or plastics material, has a circumferential zone 13 radially overlapping the rim 11 of the neck 3 .
  • the free end of the at least one detachment knife 15 is also curved on both sides in such a way that it has a spoon-like, concave curvature (not shown) facing the rim 11 .
  • the screw cap 70 can also have a counter-pressure lip 72 ( FIG. 16 ) in the form of an annulus disposed on the inside of the top section 8 between at least one concentrically disposed, in this case relatively short, ie, low-height, pressure lip 23 and the inside surface 9 ′ of the sleeve section 9 , which counter-pressure lip presses against the sealing film 14 when the screw cap is screwed down onto the neck 3 , and which, when the screw cap is unscrewed, is designed to support the edge of the sealing film 14 against the pressure of the ends of the detachment knife or knives 15 with its restoring force in such a way that said ends are more able to slide under the circumferential zone 13 of the sealing film 14 and penetrate the sealing surface 12 .
  • a counter-pressure lip 72 FIG. 16
  • circumferential zone 13 does not necessarily have to overlap the rim 11 of the neck 3 . It also does not necessarily have to have an unglued or unsealed circumferential edge in order to ensure optimal penetration by the knife edge(s) 19 of the detachment knife/knives 15 .
  • the respective design of the embodiment of the invention is in this regard dependent on the parameters specified in each case, of which mention may be made of the material of the screw cap itself, the material of the sealing film 14 , the material of the adhesive used, and the elasticity of the detachment knife/knives by way of example only.
  • the screw cap 70 for example, no reinforcement disk 22 is used for a sealing film 14 , although the film may require such reinforcement, as described in previous embodiments, which is why the counter-pressure lip 72 is advantageous in this embodiment.
  • the pressure lip 23 serves not only to exert pressure on a circumferential zone 13 of the sealing film 14 , should such a circumferential zone be present, but also to reseal the neck 3 of, say, a bottle 1 after the sealing film 14 has been removed and when the bottle is reclosed each time the screw cap 7 , 7 ′, or 70 is unscrewed for the removal of part of the contents, by which means the bottle is resealed.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US11/571,401 2004-07-01 2005-06-30 Method For Peeling Off Or Separating A Sealing Film Sealed Onto The Rim Of The Neck Of A Bottle Or The Like And Screw Cap For Carrying Out Said Method Abandoned US20080083694A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102004032100.0 2004-07-01
DE102004032100A DE102004032100B4 (de) 2004-07-01 2004-07-01 Verfahren zum Ablösen bzw. Abtrennen einer auf den Rand des Halses einer Flasche od. dergl. aufgesiegelten Siegelfolie und Schraubkappen zur Ausführung dieser Verfahren
PCT/EP2005/007056 WO2006002922A1 (de) 2004-07-01 2005-06-30 Verfahren zum ablösen bzw. abtrennen einer auf den rand des halses einer flasche od. dergl. aufgesiegelten siegelfolie und schraubkappe zur ausführung dieses verfahrens

Related Parent Applications (1)

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PCT/EP2005/007056 A-371-Of-International WO2006002922A1 (de) 2004-07-01 2005-06-30 Verfahren zum ablösen bzw. abtrennen einer auf den rand des halses einer flasche od. dergl. aufgesiegelten siegelfolie und schraubkappe zur ausführung dieses verfahrens

Related Child Applications (1)

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US13/046,013 Division US9517869B2 (en) 2004-07-01 2011-03-11 Method for detaching or separating a sealing film or foil sealingly attached to the rim of the neck of a bottle, or the like, and a screw cap for implementation of said method

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US13/046,013 Expired - Fee Related US9517869B2 (en) 2004-07-01 2011-03-11 Method for detaching or separating a sealing film or foil sealingly attached to the rim of the neck of a bottle, or the like, and a screw cap for implementation of said method

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US (2) US20080083694A1 (ja)
EP (1) EP1768916B1 (ja)
JP (1) JP4981666B2 (ja)
CN (1) CN101001791B (ja)
AT (1) ATE482891T1 (ja)
AU (1) AU2005259424B2 (ja)
CA (1) CA2572379C (ja)
CY (1) CY1111657T1 (ja)
DE (2) DE102004032100B4 (ja)
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NO (1) NO339274B1 (ja)
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US8100277B1 (en) 2005-07-14 2012-01-24 Rexam Closures And Containers Inc. Peelable seal for an opening in a container neck
US20080290060A1 (en) * 2005-10-07 2008-11-27 Rainer Ammann Closure
US20090184082A1 (en) * 2006-04-20 2009-07-23 Tetra Laval Holdings & Finance S.A. Stopper Device for a Container, a Container Fitted with Such a Device, and a Method of Fabricating Such a Device
US20100140208A1 (en) * 2007-06-05 2010-06-10 Fiorenzo Parrinello Closure for a sealed container of a pourable food product, and method of producing thereof
US8910811B2 (en) 2007-06-05 2014-12-16 Tetra Laval Holdings & Finance S.A. Closure for a sealed container of a pourable food product, and method of producing thereof
US8650839B1 (en) 2007-11-02 2014-02-18 Berry Plastics Corporation Closure with lifting mechanism
US8251236B1 (en) 2007-11-02 2012-08-28 Berry Plastics Corporation Closure with lifting mechanism
US20120187073A1 (en) * 2009-06-26 2012-07-26 Sidel S.P.A. Con Socio Unico Liquid bottling method and machine, in particular for carbonated liquids or oxygen sensitive liquids
US9156669B2 (en) * 2009-06-26 2015-10-13 Sidel S.P.A. Liquid bottling method and machine, in particular for carbonated liquids or oxygen sensitive liquids
US20120292321A1 (en) * 2010-04-01 2012-11-22 Tetra Laval Holdings &Finance S.A. Closure for a container
US8851310B2 (en) * 2010-04-01 2014-10-07 Tetra Laval Holdings & Finance S.A. Closure for a container
EP2571779A2 (en) * 2010-05-20 2013-03-27 Tetra Laval Holdings & Finance S.A. A cap with a tamper evidence and a spout
US9944428B2 (en) 2010-05-20 2018-04-17 Tetra Laval Holdings & Finance S.A. Cap with a tamper evidence and a spout
EP3674229A3 (en) * 2010-05-20 2020-09-23 Tetra Laval Holdings & Finance S.A. A cap with a tamper evidence and a spout
US10232977B2 (en) * 2010-05-20 2019-03-19 Tetra Laval Holdings & Finances S.A. Cap with a tamper evidence and a spout
US20140008378A1 (en) * 2010-12-06 2014-01-09 Red Bull Gmbh Container, in Particular a Drink Container
US9241587B2 (en) * 2010-12-06 2016-01-26 Red Bull Gmbh Container, in particular a drink container
US20150114923A1 (en) * 2012-01-20 2015-04-30 Ardagh Mp Group Netherlands B.V. Cover unit with adapter, cover, and sealing film for a container

Also Published As

Publication number Publication date
JP4981666B2 (ja) 2012-07-25
US9517869B2 (en) 2016-12-13
RU2007103837A (ru) 2008-08-10
JP2008504176A (ja) 2008-02-14
WO2006002922A1 (de) 2006-01-12
CA2572379A1 (en) 2006-01-12
CN101001791B (zh) 2010-06-16
ES2358878T3 (es) 2011-05-16
AU2005259424A1 (en) 2006-01-12
ATE482891T1 (de) 2010-10-15
NO339274B1 (no) 2016-11-21
CN101001791A (zh) 2007-07-18
US20110155687A1 (en) 2011-06-30
DE102004032100A1 (de) 2006-04-27
DE102004032100B4 (de) 2006-06-22
DE502005010314D1 (de) 2010-11-11
EP1768916B1 (de) 2010-09-29
NO20070667L (no) 2007-01-31
CA2572379C (en) 2012-09-04
EP1768916A1 (de) 2007-04-04
AU2005259424B2 (en) 2011-02-10
CY1111657T1 (el) 2015-10-07
RU2346869C2 (ru) 2009-02-20

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