EP0960054B2 - Pet-flasche mit einem kunststoffschraubverschluss - Google Patents

Pet-flasche mit einem kunststoffschraubverschluss Download PDF

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Publication number
EP0960054B2
EP0960054B2 EP98909299A EP98909299A EP0960054B2 EP 0960054 B2 EP0960054 B2 EP 0960054B2 EP 98909299 A EP98909299 A EP 98909299A EP 98909299 A EP98909299 A EP 98909299A EP 0960054 B2 EP0960054 B2 EP 0960054B2
Authority
EP
European Patent Office
Prior art keywords
sealing
sealing strip
olive
bottle
bottle neck
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98909299A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0960054A1 (de
EP0960054B1 (de
Inventor
Günter Krautkrämer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bericap GmbH and Co KG
Original Assignee
Bericap GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=7820278&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0960054(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Bericap GmbH and Co KG filed Critical Bericap GmbH and Co KG
Publication of EP0960054A1 publication Critical patent/EP0960054A1/de
Application granted granted Critical
Publication of EP0960054B1 publication Critical patent/EP0960054B1/de
Publication of EP0960054B2 publication Critical patent/EP0960054B2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65D41/00—Caps, e.g. crown caps or crown seals, i.e. members having parts arranged for engagement with the external periphery of a neck or wall defining a pouring opening or discharge aperture; Protective cap-like covers for closure members, e.g. decorative covers of metal foil or paper
    • B65D41/02—Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04—Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0407—Threaded or like caps or cap-like covers secured by rotation with integral sealing means
    • B65D41/0414—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck
    • B65D41/0421—Threaded or like caps or cap-like covers secured by rotation with integral sealing means formed by a plug, collar, flange, rib or the like contacting the internal surface of a container neck and combined with integral sealing means contacting other surfaces of a container neck
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S215/00—Bottles and jars
    • Y10S215/901—Tamper-resistant structure

Definitions

  • the present invention relates to a PET bottle with plastic screw cap, consisting of one essentially cylindrical jacket with internal thread for screwing on the external thread of a Bottleneck, and with a substantially circular disk-shaped head plate and a substantially cylindrical and from the inside of the Top plate axially inwardly extending sealing strip, its outer diameter is approximately the outer one Bottle neck diameter corresponds or slightly larger and its inside diameter is n-definite smaller than the outer bottleneck edge, wherein radially outside the weather strip at the transition from the top plate to the shell of the closure a bead with an approximately cylindrical inner surface is provided, the inner diameter at most equal to and preferably slightly lower than that Sum of bottleneck diameter and the double the thickness of the weather strip is.
  • the known combination of waszctaresses is for screwing the closure onto the threaded neck of bottles provided and designed so that the approximately cylindrical sealing strips extending from above and outside here on the bottleneck hangs up and essentially along the upper outer, rounded Edge of the bottle neck or bottle mouth sealingly rests.
  • the sealing strip is additional still between an outer, approximately cylindrical Bead and the bottleneck pinched and in tight sealing engagement with the bottleneck edge pulled and pressed.
  • such would be one Closure also for plastic bottles, e.g. PET bottles, usable.
  • the Bottles in general and in particular also the bottlenecks and estuarines before reuse visually checked.
  • this can not be ruled out be that damage to the bottleneck edge in the area where he puts the cap or sealing elements of the cap in Sealing engagement occurs, be overlooked, in particular if these damages are relatively small and inconspicuous are.
  • this also applies to plastic bottles, especially for the increasingly more widespread finding PET bottles.
  • plastic bottles may also be production-related with something larger manufacturing tolerances or damage during manufacture or handling to count. Small damages, especially in Form of small dents or scores, are visually only difficult to see.
  • bottles are bottled and sealed, their bottleneck marginal damage, Deformations or production-related unevenness but sufficient, the sealing engagement between bottleneck edge and sealing elements to affect the cap. This applies especially if the inside of the bottle is under pressure stands, such as B. in the case of using the bottles for carbonated drinks.
  • a bad seal can cause in such bottles that Gas escapes from the bottle and thereby the pressure lowers, which in turn leads to outgassing in the Drink contains carbonated which then after a few days or weeks storage time its carbonic acid has largely lost and accordingly scarf tastes.
  • cap becomes known, the one especially ensure good sealing engagement.
  • a In approximately cylindrical sealing strip has this
  • known cap a in about horizontally extending sealing strip, which itself on the upper bottleneck hangs up, in addition annular projections on the floor or the Head plate of the closure cap are provided, the on the opposite side of the bottle neck Side of the sealing strip with this engage and a line-shaped sealing pressure on the To exercise sealing strips.
  • annular projections on the floor or the Head plate of the closure cap are provided, the on the opposite side of the bottle neck Side of the sealing strip with this engage and a line-shaped sealing pressure on the To exercise sealing strips.
  • approximately cylindrical sealing olive provided the term "olive" vividly the bottom one Cross section of this part circumscribes which one outward projecting area, which also has approximately in a line with the cylindrical inner surface the bottleneck should engage.
  • the inner surface a bottleneck is at least for PET bottles generally pretty well defined However, have quite damage, so that the lead of the sealing olive in spite of its essentially linear engagement with thecommercenhalsinneren can not guarantee a secure seal.
  • the sealing projection in the known closure is also at a considerable distance from the approach of Seal lamination provided on the top plate, so that in the area of the projection no very high elastic Return or contact forces result.
  • a substantially radially extending Sealing lamella partly covers the outer, generally well-defined, rounded bottleneck, but it can also be damaged but as well as the sealing olive not the inner, slightly rounded edge of the bottleneck edge.
  • sealing ring is tapering in diameter, directed obliquely inward, so that here too the demolding difficult to accomplish and moreover the sealing function of the sealing ring is worse, since the sealing ring only under pressure on the bottleneck edge hangs up and not, as in the substantially cylindrical axially from the inside of the top plate inside extending sealing strips, under stretching aufgieitet on the fish shack.
  • the known closures therefore have at least partial manufacturing problems and in particular while demolding and grant on the other hand still no absolutely safe seal in the case of small Damage or deformation of the bottleneck edge or in harsh transport conditions and high temperatures.
  • the present invention Compared to this prior art is the present invention, the object of a PET bottle with a Plastic screw cap with the aforementioned Characteristics to create which leaks even better prevented and which beyond should be easily demoulded, if possible, to the Produce with a simple as possible injection mold to facilitate.
  • the PET bottle with the Kunststoffschraubverschluß in addition to the features mentioned above has the further features that radially within the cylindrical sealing strip another, substantially cylindrical sealing strip, hereinafter referred to as Dichtolive, with a cross-sectional shape, in is about an olive, is provided, the outer diameter of which is at least in the vicinity of the top plate and the sealing strip opposite region greater than the inner diameter of a bottle neck, for which the closure is provided, and that the deviation (
  • the outer weather strip in is designed approximately as in the case of the known DE 41 28 474, thus a fairly good seal of the upper reaches the outer neck of the bottle, is in addition one inner sealing olive provided, in addition, the Inner surface at the upper edge of the bottle neck seals.
  • the latter is achieved by this Dichtolive also located in the near the top plate and the sealing strip opposite area, i.e. in the area where in on a bottle screwed closure normally too the upper edges of the neck are always still has a larger outer diameter than it the inner diameter of the bottle neck or the Bottleneck edge in this area corresponds, so that is, the inner sealing olive pushed radially inward becomes and seals itself against the inner surface the bottleneck edge creates.
  • the clear distance between the weather strip and sealing olive in the sealing area less than two thirds, possibly even is less than half the thickness of the bottle neck.
  • the sealing olive as well as the sealing strip preferably from the plastic material of the closure exist, they have sufficient elasticity, to when putting on or screwing the closure pushed away through the bottleneck but due to the occurring elastic Restoring forces in very tight, sealing engagement to come with the upper Flaschhalsrand.
  • the invention provided that the sealing olive on their outside has a flat bead, which in the Cross-section roughly the shape of an obtuse angle Triangle has.
  • the radial Pushing the inner approach inward is synonymous with a compression of the material is off which the sealing olive consists.
  • the bead the one has correspondingly larger outer diameter occurs on the one hand in sealing engagement with the inner surface of the Bottleneck edge and enforces beyond that greater compression of the material from which the Dichtolive exists, and thus an increase in the elastic restoring force, ultimately the safe Sealing engagement ensured.
  • the sealing olive is preferably rounded and / or bevelled so that in the axial movement in the direction of the neck of the bottle the sealing olive is actually pressed radially inward and not on the bottleneck edge or even pushed radially outward.
  • the sealing strip on his free end a rounded and / or bevelled Form, so that when moving axially toward the bottleneck is spread radially outward, when it engages the bottleneck.
  • the variants can be selected of sealing strip and sealing olive to this effect characterize that their deviations from an exact Hollow cylinder shape substantially on the outer wall the approach and on the inner wall of the sealing strip are limited.
  • the olive is in the preferred embodiment about remedies for the following effects:
  • the outer surfaces of the Sealing olive and the inner surface of the sealing strip across the axial extent of the weather strip substantially parallel, i. you have the length the sealing strip across an approximately constant clear width between sealing olive and sealing strip, and the outer surface of the Dichtotive runs thereby especially in the axial height of the end of the sealing strip parallel to the bevelled and rounded Form of the same.
  • cross section so has the between Seal olive and weatherstrip formed cavity a narrow, slightly curved concave and top rounded shape, is open at its lower end and closed at the top.
  • this cavity has in cross section a substantially constant width and tapers only at its upper closed and rounded end, with the upper section, related on the closure axis, is almost cylindrical, and the lower portion tapers conically outwards.
  • the axial length of the cavity, the clear narrower than the associated bottleneck is thick, is thereby by the length of the outer weather strip which in turn is relatively short, so that he in the screwed on a bottleneck state so just the outer, rounded neck of the bottle neck completely covered.
  • this cavity has an axial depth (corresponding to the axial length the sealing strip) of less than 4 mm, preferably less than 3 mm and especially about 2 up to 2.5 mm.
  • the free end of the jacket of the screw cap is preferably integral with a guarantee and tear strip provided.
  • a guarantee and tear strip provided.
  • the total of Closure in the preferred embodiment of a single piece of a homogeneous plastic material produced by injection molding.
  • the essentially cylindrical forms of the sealing olive and the Sealing strip and the short axiaie length of the same allow a relatively easy and simple Demolding and a correspondingly simple-shaped Production tool.
  • FIG. 1a the Screw cap for the inventive combination of PET bottle and plastic screw cap in a shaft containing the Longitudinal cut.
  • the screw is in essentially from a cylindrical shell 1 with a integrally adjoining, approximately circular disk-shaped Head plate 2.
  • a guarantee and tear strip 7 which by loosening the screw cap of a Bottle ruptures or tears from the jacket 1 and thus marks an already opened bottle.
  • the cylindrical shell 1 has a piecewise broken internal thread 8 and on its outside a grip corrugation 9, soft application torque when gripping the cap to make my fingers easier.
  • the two, the seal with the bottleneck effecting elements are the annular encircling, cylindrical sealing strips 4 and also ring-shaped and parallel to this circumferential sealing olive 3.
  • the outer wall of the cylindrical runs Seal strip 4 as well as the inner wall the cylindrical sealing olive 3 in section straight and thus pretty exactly cylindrical.
  • the inner wall of the cylindrical sealing strip 4 extends only over a relatively short section paraxial and is then rounded towards the free end and sloping leaking outwards.
  • the outer wall of the cylindrical "Olive" 3 has a flat cross-section bead approximately in the form of an obtuse triangle, wherein the blunt tip of this obtuse triangle the maximum outer diameter of the neck 3 or the bead defined and axially approximately with the free End of the sealing strip 4 coincides.
  • Head plate 2 then runs the outer wall of the cylindrical Dichtolive 3, starting from the bead approximately parallel to the oblique and rounded running End section, before returning approximately runs parallel to the axis and then in an arc in the inner wall of the sealing strip 4 passes.
  • FIG 1b the closure is shown in approximately natural size in a side view. It can be clearly seen the corrugation 9 on the outside of the screw cap, which should facilitate the screwing and unscrewing of the closure, and the lower Knoxieund tear strip 7. Moreover, the closure in Figures 1 and 2 is shown exactly to scale, the dimension R a slightly less than 31 mm. From this, because of the true-to-scale representation, all other dimensions can be derived exactly, and the absolute and relative dimensions of all elements are disclosed on the basis of the true-to-scale representation by the figures. It is understood, however, that the invention is not limited to the observance of the absolute and relative dimensions of the individual elements of the closure cap.
  • the free end of the sealing olive 3 is clear rounded so that the free end of the sealing olive 3, when it hits the edge of a bottle neck, slides inwards and is pushed away.
  • the plastic screw cap is again in the same Cutting plane, but in that on a bottleneck firmly screwed state to recognize.
  • the sealing olive 3 by engaging her rounded free end with the face of the bottle neck 10 pushed away inside, the bead lies on the inner, cylindrical surface of the bottle neck at.
  • it is the cylindrical one Olive 3 pushed inwards and compressed so that a corresponding elastic restoring force results, which establishes a tight sealing engagement.
  • the seal results from engagement with the sealing strip 4 which, when its free, rounded or chamfered end, engages with the face of the bottle neck, is then forced out between the outer surface of the bottle neck and a cylindrical bead 5 and being pulled around the upper outer edge of the bottle by the bead, said bead 5 being provided at the transition between the cap skirt and the top plate and having a substantially cylindrical inner surface. Because of the details of the thus achieved, good sealing engagement is made to DE 41 28 474.
  • the sealing olive 3 is significantly thicker and preferably about twice as thick (without consideration of the bead) as the sealing strip 4, it is provided in the preferred embodiment of the invention that the outer diameter 2R 1 of the Dichtolive, in the area in which they engages the upper bottleneck edge, a smaller difference to the inner diameter d of the bottle neck edge in this area than the sealing strip 4 with its inner surface relative to the outer edge of the bottle neck, since the sealing strip 4 is deformed with the same force easier than the sealing olive 3. This can can also be clearly seen in Figure 2 and by comparison with Figure 1.
  • between the sealing olive and the inner neck of the bottle when the closure is not screwed onto a bottle neck is only about one third to one quarter of the diameter difference D - 2r 2 between the inner surface of the sealing strip and the outer neck of the bottle neck.
  • the bottleneck exerts on the two Seal elements radially opposite forces which largely cancel each other out. This avoids one, that in conventional one-sided Seals these forces absorbing top plate (or cap bottom) these forces by slow Flow gives way and thus the sealing engagement gradually makes weaker.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
  • Insulators (AREA)
  • Finger-Pressure Massage (AREA)
  • Prostheses (AREA)
  • Materials For Medical Uses (AREA)
EP98909299A 1997-02-14 1998-01-29 Pet-flasche mit einem kunststoffschraubverschluss Expired - Lifetime EP0960054B2 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19705717 1997-02-14
DE19705717A DE19705717A1 (de) 1997-02-14 1997-02-14 Kunststoffschraubverschluß
PCT/DE1998/000266 WO1998035881A1 (de) 1997-02-14 1998-01-29 Kunststoffschraubverschluss

Publications (3)

Publication Number Publication Date
EP0960054A1 EP0960054A1 (de) 1999-12-01
EP0960054B1 EP0960054B1 (de) 2001-10-04
EP0960054B2 true EP0960054B2 (de) 2005-05-04

Family

ID=7820278

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98909299A Expired - Lifetime EP0960054B2 (de) 1997-02-14 1998-01-29 Pet-flasche mit einem kunststoffschraubverschluss

Country Status (18)

Country Link
US (1) US6325226B1 (cs)
EP (1) EP0960054B2 (cs)
JP (1) JP2001511744A (cs)
CN (1) CN1166532C (cs)
AT (1) ATE206379T1 (cs)
AU (1) AU724859B2 (cs)
BR (1) BR9807364A (cs)
CA (1) CA2281705C (cs)
CZ (1) CZ291781B6 (cs)
DE (3) DE19705717A1 (cs)
ES (1) ES2162423T5 (cs)
HU (1) HUP0000612A3 (cs)
PL (1) PL189578B1 (cs)
RO (1) RO117781B1 (cs)
RU (1) RU2182877C2 (cs)
TR (1) TR199901960T2 (cs)
UA (1) UA42884C2 (cs)
WO (1) WO1998035881A1 (cs)

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RU2279381C2 (ru) * 2000-11-21 2006-07-10 Бисан Энд Санз Лимитед Пробочные уплотнения для удобных для использования колпачковых устройств

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DE59801631D1 (de) 2001-11-08
RU2182877C2 (ru) 2002-05-27
JP2001511744A (ja) 2001-08-14
AU6390798A (en) 1998-09-08
HUP0000612A3 (en) 2000-10-30
PL335256A1 (en) 2000-04-10
UA42884C2 (uk) 2001-11-15
ES2162423T3 (es) 2001-12-16
DE19705717A1 (de) 1998-08-20
EP0960054A1 (de) 1999-12-01
EP0960054B1 (de) 2001-10-04
CZ291781B6 (cs) 2003-05-14
PL189578B1 (pl) 2005-08-31
WO1998035881A1 (de) 1998-08-20
TR199901960T2 (xx) 1999-12-21
HUP0000612A2 (en) 2000-07-28
ES2162423T5 (es) 2005-09-01
CA2281705C (en) 2008-04-01
BR9807364A (pt) 2000-03-14
US6325226B1 (en) 2001-12-04
CA2281705A1 (en) 1998-08-20
RO117781B1 (ro) 2002-07-30
AU724859B2 (en) 2000-10-05
CN1251073A (zh) 2000-04-19
CZ9902846A3 (cs) 2001-02-14
CN1166532C (zh) 2004-09-15
DE19880115D2 (de) 2000-01-27
ATE206379T1 (de) 2001-10-15

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