EP0308995A2 - Diebstahlsicherer Plastikverschluss für Behälter - Google Patents

Diebstahlsicherer Plastikverschluss für Behälter Download PDF

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Publication number
EP0308995A2
EP0308995A2 EP88116832A EP88116832A EP0308995A2 EP 0308995 A2 EP0308995 A2 EP 0308995A2 EP 88116832 A EP88116832 A EP 88116832A EP 88116832 A EP88116832 A EP 88116832A EP 0308995 A2 EP0308995 A2 EP 0308995A2
Authority
EP
European Patent Office
Prior art keywords
pilfer
closure
bottom portion
proof bottom
proof
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.)
Withdrawn
Application number
EP88116832A
Other languages
English (en)
French (fr)
Other versions
EP0308995A3 (de
Inventor
Fumio Mori
Junichi Itsubo
Takashi Yazaki
Isao Ichinose
Katsuake Tanaka
Osamu Ishii
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.)
Nippon Closures Co Ltd
Original Assignee
Japan Crown Cork Co Ltd
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
Priority claimed from JP59005756A external-priority patent/JPS60158048A/ja
Priority claimed from JP59138904A external-priority patent/JPS6121355A/ja
Priority claimed from JP59224126A external-priority patent/JPS61104959A/ja
Application filed by Japan Crown Cork Co Ltd filed Critical Japan Crown Cork Co Ltd
Publication of EP0308995A2 publication Critical patent/EP0308995A2/de
Publication of EP0308995A3 publication Critical patent/EP0308995A3/de
Withdrawn legal-status Critical Current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
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • 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
    • B65D41/32—Caps or cap-like covers with lines of weakness, tearing-strips, tags, or like opening or removal devices, e.g. to facilitate formation of pouring openings
    • B65D41/34—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt
    • B65D41/3423—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt
    • B65D41/3428—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with flexible tabs, or elements rotated from a non-engaging to an engaging position, formed on the tamper element or in the closure skirt the tamper element being integrally connected to the closure by means of bridges
    • 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/30—Tamper-ring remaining connected to closure after initial removal
    • 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/35—Vertical or axial lines of weakness
    • 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
    • B65D2401/00—Tamper-indicating means
    • B65D2401/15—Tearable part of the closure
    • B65D2401/40—Bridges having different cross-sections

Definitions

  • This invention relates to a pilfer-proof plastic closure for containers, and more specifically, to a pilfer-proof plastic closure for application to a container of the kind referred to in the pre-­characterizing portion of patent claim 1.
  • a closure is known from US-A- 4 418 828.
  • Pilfer-proof metallic closures for containers holding various drinks have recently been superseded by pilfer-proof plastic closures.
  • a typical example of such plastic container closures is disclosed in Japanese Laid-Open Patent Publication No. 74445/1981 and U.S. Patent No. 4,418,828.
  • the closure disclosed in these patent documents has a top panel wall and a cylindrical skirt wall extending downwardly from the peripheral edge of the top panel wall.
  • a circumferentially extending breakable line is formed in the skirt wall to divide it into a main portion above the breakable line and a pilfer-proof bottom portion below it.
  • the circumferentially extending breakable line composes of a plurality of circumferentially extending slits spaced from each other in the circumferential direction and a plurality of bridging portions positioned among the circumferential slits.
  • An internal thread is formed on the inner surface of the main portion, and a plurality of radially inwardly projecting engaging flaps are formed on the inner surface of the pilfer-proof bottom portion at circumferentially spaced positions.
  • the plastic closure of the above structure is applied to a container equipped with a mouth-neck portion having an external thread formed on its peripheral surface and a holding jaw portion located beneath the external thread.
  • the closure is put over the mouth-neck portion and turned in a closing direction to fit the external thread of the mouth-neck portion in the internal thread of the closure.
  • the closure turns in the closing direction with respect to the mouth-neck portion and at the same time, moves axially downwardly.
  • the holding jaw portion formed on the outer surface of the mouth-neck portion interferes with the engaging flaps formed on the inner surface of the pilfer-proof bottom portion to elastically bend them radially outwardly.
  • the closure is turned in an opening direction which is reverse to the closing direction.
  • the internal thread of the closure is moved along the external thread of the mouth-neck portion, and therefore, the closure turns in the opening direction and simultaneously moves axially upwardly.
  • the pilfer-­proof bottom portion of the closure cannot move axially upwardly because the engaging flaps formed on its inner surface engage the undersurface of the holding jaw portion of the mouth-neck portion. This results in a considerable stress on the bridging portions of the breakable line formed in the skirt wall of the closure.
  • the bridging portions are broken to separate the skirt wall into the main portion and the pilfer-proof bottom portion. Thereafter, the top panel wall and the main portion of the skirt wall are removed from the mouth-neck portion. The mouth-neck portion thus opened, and the pilfer-proof bottom portion remains attached to the mouth-neck portion.
  • container closure of the above structure and function should meet the following two requirements. Firstly, in closing the mouth-neck portion of the container with the closure, the engaging flaps should be easily bendable elastically in the radially outward direction during their passage over the holding jaw portion, so as to mount the closure on the mouth-­neck portion with a relatively low rotating torque and to accurately prevent generation of an excessive stress on the bridging portions of the breakable line which will result in its breakage.
  • the engaging flaps should fully accurately engage the holding jaw portion so as to accurately prevent the closure from slipping out of the mouth-neck portion without the breakage of the bridging portions of the breakable line as a result of the engaging flaps going past the holding jaw portion while being bent radially outwardly. It will be appreciated that if this slipping occurs, the pilfer-­proof characteristics of the closure will be impaired.
  • the pilfer-proof bottom portion remains attached to the mouth-neck portion, it must be removed when the container is to be used again. This removing operation, however, is considerably complex. Moreover, when the pilfer-proof bottom portion remains in the mouth-neck portion and the top panel wall and the main portion of the skirt wall which have once been removed are again mounted on the mouth-neck portion, it is not rare that the bridging portions of the closure which have been broken at the time of opening the mouth-­neck portion look as if they were not broken, and the pilfer-proof characteristics of the closure are not sufficiently evident.
  • the axial breaking line is formed of a so-called perforation or score as in the case of metallic closures. It is desired in this case to provide the axial breaking line simultaneously with, or separately from, the provision of the circumferential slits in the circumferentially extending breakable line after forming a closure blank by injection molding, compression molding, etc. as is the case with the metallic closures. To provide the perforation or score on the pilfer-proof bottom portion, it is necessary to apply cutting tools to the pilfer-proof bottom portion from both its outside and inside surfaces.
  • the actuating projecting portion of an inside cutting tool to be applied from the inside surface of the pilfer-proof bottom portion is smaller than the circumferential distance between the adjoining engaging flaps and is properly positioned between the engaging flaps.
  • the actuating projecting portion of the inside cutting tool is not positioned between the engaging flaps but at least partly overlaps the engaging flaps, it will be readily understood that the actuating projecting portion of the inside cutting tool exerts a great pressing force on the engaging flaps and consequently a great degree of deformation is undesirably generated on the engaging flaps.
  • the object of this invention is to provide a pilfer-­proof plastic container closure which, without invol­ving the aforesaid problem, can meet the requirement that the pilfer-proof bottom portion is surely broken axially and opened in tape form at the time of con­tainer opening.
  • the present inventors have conducted extensive investigations and experiments on a process for manufacturing pilfer-proof plastic closures, and have found that (i) if an axial breaking line which may be a slit or score is formed on the pilfer-proof bottom portion extending from its upper end to the upper end of its lower part or to a point somewhat below it, the lower part of the pilfer-proof bottom portion is axially broken following the axial breaking line at the time of container opening and the pilfer-proof bottom portion is opened in tape form without any particular need to form a slit or score in at least a greater portion of the lower part of the pilfer-proof bottom portion; and (ii) if at least a greater portion of the base edge of each of the engaging flaps is positioned in the lower part of the pilfer-proof bottom portion in which the axial breaking line does not exist, the above axial breaking line can be formed without causing a drastic decrease in the speed of production and without a likelihood of greatly deforming the engaging flaps.
  • This discovery has led to the
  • a pilfer-proof plastic closure for a container equipped with a mouth-neck portion having an external thread on its peripheral surface and an holding jaw portion located beneath the external thread
  • said closure comprising a top panel wall and a cylindrical skirt wall extending downwardly from the peripheral edge of the top panel wall, said skirt wall having formed therein a circumferentially extending breakable line dividing the skirt wall into a main portion above the circumferential breakable line and a pilfer-proof bottom portion below it, said main portion having formed on its inner surface an internal thread to be engaged with the external thread of the mouth-neck portion of the container and said pilfer-proof bottom portion having formed on its inner surface a plurality of radially inwardly projecting engaging flaps at circumferentially spaced positions; wherein an axial breaking line is formed in the pilfer-proof bottom portion extending downwardly from the upper end of the pilfer-proof bottom portion but being non-existent in at least a greater portion of the lower part of the pilfer-proof bottom portion,
  • FIG. 1 shows a closure blank to be processed into one embodiment of the closure constructed in accordance with this invention.
  • the blank shown generally at 2 which is formed from a suitable plastic material such as polypropylene or polyethylene by injection molding, compression molding, etc., has a circular top panel wall 4 and a cylindrical skirt wall 6 extending downwardly from the peripheral edge of the top panel wall 4.
  • An annular protrusion 8 is formed in the upper end portion of the inner surface of the skirt wall 6 so that it projects radially inwardly from the upper end portion.
  • a step portion 10 displaced diametrically inwardly.
  • a portion 12 above the step portion 10 has a considerable wall thickness, whereas the thickness of a portion 14 below the step portion 10 is descreased.
  • a step portion 16 is formed also on the inner circumferential surface of the skirt wall 6 below the step portion 10, and the portion 14 has a relatively thick portion 18 above the step portion 16 and a relatively thin portion 20 below the step portion 16.
  • the thickness t1 of the portion 20 is sufficiently small, and preferably 0.05 to 0.75 mm, especially 0.20 to 0.50 mm.
  • the thickness t2 of the relatively thick portion 18 is conveniently 0.50 to 1.10 mm, especially 0.75 to 0.85 mm. If desired, the thickness t2 of the portion 18 can be made sufficiently small as in the portion 20 (therefore, the step portion 16 does not exist).
  • a raised and depressed or knurled portion 22 is formed on the peripheral surface of the portion 12 of the skirt wall 6 in order to prevent slippage of a finger which engages it.
  • An internal thread 24 is formed on the inner circumferential surface of the portion 12 of the skirt wall 6.
  • a plurality of circumferentially spaced engaging flaps 26 are formed on the inner circumferential surface of the portion 14 of the skirt wall 6. Each of the engaging flaps 26 is projected radially inwardly from its base edge 28 connected to the inner circumferential surface of the portion 14. As will be clear from a description given hereinbelow, it is important that at least a greater portion of the base edge 28 of each of the engaging flaps 26 be positioned in the relatively thin portion 20 below the step portion 16 in the portion 14. In the illustrated embodiment, the upper end of the base edge 28 of each of the engaging flaps 26 is positioned in alignment with the step portion 16. Hence, the entire base edge 28 of each of the engaging flaps 26 is positioned in the relatively thin portion 20 below the step portion 16.
  • each of the engaging flaps 26 is bent along a bending line 30 and defined by a first portion 32 extending from the base edge 28 to the bending line 30 and a second portion 34 extending from the bending line 30 to its free end.
  • the base edge 28 extends substantially parallel,and therefore substantially vertically,to the central axis 36 ( Figure 1) of the blank 2.
  • the base edge 28 may be inclined in a suitable direction with respect to the central axis 36 ( Figure 1) of the blank 2; namely it may be inclined downwardly at a suitable angle to the closing direction of the closure for mounting the closure on the mouth-neck portion of the container (the clockwise direction as viewed from above in Figure 1, the direction shown by arrow 36 in Figures 2 and 3) or in an opposite direction.
  • the first portion 32 is inclined in a direction opposite to the aforesaid closing direction and extends radially inwardly from the base edge 28.
  • the angle ⁇ of inclination of the first portion 32 to the inner surface of the portion 20 is preferably 5° ⁇ 85°, more preferably 20° ⁇ 80°, especially preferably 30° ⁇ 70°.
  • the angle ⁇ of inclination of the second portion 34 to the first portion 32 is preferably 0° ⁇ 90°, more preferably 0° ⁇ 70°, especially preferably 5° ⁇ 45°.
  • the bending line 30 may extend substantially parallel, and therefore substantially vertically to the central axis 36 ( Figure 1) of the blank 2, or may be inclined downwardly approaching the inner surface of the portion 20. Preferably, it is inclined downwardly in a direction away from the inner surface of the portion 20.
  • the angle ⁇ of inclination of the bending line 30 to the downward direction away from the inner surface of the portion 20 is preferably 5° ⁇ 80°, more preferably 10° ⁇ 60°, especially preferably 20° ⁇ 50°.
  • the upper edge 38 of the first portion 32 conveniently extends downwardly inclinedly in a radially inward direction forming a gentle curve, and the upper edge 40 of the second portion 34 extends nearly horizontally.
  • the lower edge 42 of the first portion 32 and the lower edge 44 of the second portion 34 extend upwardly inclinedly in a radially inward direction.
  • the angle ⁇ 2 of inclination of the lower edge 44 of the second portion 34 is slightly larger than the angle ⁇ 1 of inclination of the lower edge 42 of the first portion 32.
  • the angle ⁇ 1 of inclination is 10° ⁇ 1 ⁇ 30°
  • the inclination angle ⁇ 2 is 20° ⁇ 2 ⁇ 50°.
  • a circumferential breakable line 46 is formed in the blank 2, and preferably simultaneously with the provision of the circumferential breakable line 46, axial breaking line 48 are formed in the blank 2.
  • the circumferential breakable line 46 is disposed immediately below the step portion 10, and therefore, the portion 12 having a considerable thickness located above the step portion 10 constitutes a main portion of the skirt wall 6, and the portion 14 having a decreased thickness below the step portion 10 composed of the relatively thick portion 18 and the relative thin portion 20 constitutes a pilfer-proof bottom portion.
  • the circumferential breakable line 46 itself is comprised of a plurality of circumferentially spaced and circumferentially extending slits 50 and a plurality of bridging portions 52 located among the slits 50.
  • the portion 14, i.e. the pilfer-proof bottom portion 14, is connected to the portion 12, i.e. the main portion 12 of the skirt wall 6, via the bridging portions 52.
  • One bridging portion 52A among the plurality of bridging portions 52 is formed as a high strength bridging portion which has a larger circumferential length than the other bridging portions 52 and higher strength than the others. If desired, two or more of them may be formed as high strength bridging portions.
  • two axial breaking lines 48 are provided circumferentially at predetermined intervals (the intervals will be described further hereinafter), although the number of such axial breaking lines 48 may be 1 or 3 or more.
  • One of the axial breaking lines 48 is disposed adjacent to one end of the high strength bridging portion 52A as viewed circumferentially, and the other, adjacent to the other end of the high strength bridging portion 52A as viewed circumferentially.
  • the axial breaking lines 48 extend downwardly from the upper end of the pilfer-proof bottom portion 14, but terminate at the upper end (therefore, the step portion 16) of the relatively thin portion 20 of the pilfer-proof bottom portion 14 or at a point slightly below it, and that they do not exist at least in a greater portion of the relatively thin portion 20.
  • the axial breaking lines 48 may extend substantially parallel to the axis 36, or with a slight inclination to the axis 36, as shown in the drawing.
  • the axial breaking lines 48 themselves may be formed of a slit made by completely cutting a material, or of a score of a perforation made by partly cutting the material in the thickness direction.
  • each of the illustrated axial breaking lines 48 is comprised of a slit 54 extending from the upper end of the pilfer-­proof bottom portion 14 to the step portion 16 (therefore, along the entire portion 18 of the pilfer-­proof bottom portion 14) and a score 56 following the slit 54 and extending downwardly over some distance (therefore, along the relatively thin portion 20 of the pilfer-proof bottom portion 14).
  • the cut depth of the material is progressively descreased as it extends downwardly. Accordingly, the thickness of the remaining material is progressively increased as it extends downwardly.
  • the axial breaking lines 48 With regard to the axial breaking lines 48, the following fact should be noted.
  • an outside cutting tool having cutting blades corresponding to the slit 50 and the slits 54 and 56 formed at its peripheral edge to the blank 2 from its peripheral surface and at the same time, apply an inside cutting tool having actuating projecting portions cooperating with the cutting blades to it from its inner circumferential surface.
  • the axial breaking line 48 terminates at the upper end of the relatively thick portion 20 of the pilfer-proof bottom portion 14 or at a point slightly below it and does not exist in at least a greater portion of the relatively thin portion 20. Hence, it is not at all necessary to apply the actuating projecting portion of the inside cutting tool to at least a greater portion of the relatively thin portion 20. In addition, at least a greater portion of the base edge 28 of each of the engaging flaps 26 is positioned in the relatively thin portion 20. Accordingly, the axial breaking line 48 can be formed without the need for an operation of setting the angular relation between the blank 2 and the inside cutting tool at a predetermined one, which is complex and cause a drastic decrease in efficiency. Furthermore, this can be achieved while surely avoiding the deformation of the engaging flaps 26 by the great pressing force of the actuating projecting portion of the inside cutting tool.
  • the axial breaking line 48 is formed at an arbitrary angular position. As will be understood from a description given hereinafter, in opening the closure, the relatively thin portion 20 of the pilfer-­proof bottom portion 14 should be broken following the axial breaking line 48.
  • the engaging flaps 26 are arranged circumferentially at equal intervals in the illustrated embodiment, and moreover, the circumferential distance CD of the two axial breaking lines 48 is set as follows with respect to the circumferential pitch P of the engaging flap 26 and the circumferential width W of the base edge 28 of the engaging flap 26. (n+1)P - W>CD>nP + W
  • n is 0 or a positive integer.
  • at least one of the two axial breaking lines 48 is at an angular position at which it is not aligned with, or does not overlap, the base edge 28 of the engaging flap 26. Accordingly, at the time of opening the closure, the relatively thin portion 20 of the pilfer-proof bottom portion 14 can be surely and easily broken following the breaking of at least one of the two axial breaking lines 48.
  • a sealing liner 58 of a suitable plastic material may be formed on the inside furface of the top panel wall 4 of the blank 2, or more specifically on the annular projection 8 formed on the inside surface of the top panel wall 4, after or before the provision of the circumferential breakable line 46 and the axial breaking lines 48.
  • the formation of the sealing liner 58 can be effected by a molding method known per se .
  • a sealing protrusion of a suitable shape may be integrally formed on the inner surface of the top panel wall 4 of the blank 2.
  • the finished closure 60 so formed is applied to a container having a mouth-neck portion 62 of the form indicated in Figure 6.
  • a mouth-neck portion 62 of the form indicated in Figure 6.
  • an external thread 64 and a holding jaw portion 66 beneath it are formed on the cylindrical peripheral surface of the mouth-neck portion 62.
  • each of the engaging flaps 26 completely goes past the holding jaw portion 66 and is released from interference by the holding jaw portion 66. As a result, the engaging flaps 26 elastically returned to their original state.
  • the closure 60 is turned in the opening direction, i.e. counterclockwise as viewed from above in Figure 6.
  • the internal thread 24 of the closure 60 moves along the external thread 64 of the mouth-neck portion 62, and therefore, the closure 60 moves axially upwardly as it is turned.
  • the pilfer-proof bottom portion 14 cannot move axially upwardly since the engaging flaps 26 formed on its inner surface and engaged with the undersurface of the holding jaw portion 66 of the mouth-neck portion 62. Consequently, a considerable stress is generated on the circumferential breakable line 46, and more specifically on its bridging portions 52.
  • the bridging portion 52 of the circumferential breakable line 46 are therefore broken while leaving the high strength bridging portion 52A as shown in Figure 7. Furthermore, as shown in Figure 7, the relatively thin portion 20 of the pilfer-proof bottom portion 14 is broken following the breaking of at least one of the two axial breaking lines 48. As a result, the pilfer-proof bottom portion 14 is opened in tape form, and the engaging flaps 26 are disengaged from the undersurface of the holding jaw portion 66.
  • the portion 20 is surely broken following the axial breaking lines 48 without the need to form a score or the like.
  • the entire closure 60 including the pilfer-proof bottom portion 14 linked to the main portion 12 by the high strength briding portion 52A remaining unbroken is moved axially upwardly as it is turned. As a result, the entire closure 60 is removed from the mouth-neck portion 62 and the mouth-neck portion 62 is opened.
  • the engaging flaps 26 engage the undersurface of the holding jaw portion 66 more strongly in the closure 60 improved in accordance with this invention than in the conventional closure in which the second portion 34 of each engaging flap 26 is not bent with respect to the first portion 32 but extends in a straight line with the first portion 32 as shown by the two-dot chain line in Figure 3.
  • the required upwardly rotating torque which must be exerted on the closure 60 of this invention when the engaging flaps 26 are passed in the elastically bent state over the holding jaw portion 66 in the axially upward direction is made considerably higher than that on the conventional closure.
  • the closure 60 is surely prevented from being removed from the mouth-neck portion 62 without the desired breakage of the breakable line 46 and the breaking lines 48, and the pilfer-proof characteristics of the closure 60 can be retained.
  • a holding protrusion on the outside surface of the pilfer-proof bottom portion 14, preferably adjacent to the right side of one of the breaking lines48, so that in opening the mouth-neck portion 62 by removing the closure 60 from it, the holding protrusion is pulled to break the breakable line 46 and simultaneously the breaking line 48 in its entirety, and thereafter, the closure 60 is turned counterclockwise as viewed from above in Figure 6.
  • Ten blanks having substantially the same form as the blank 2 shown in Figures 1 to 3 were molded from poly­propylene having a melt index of 2.0 and a density of 0.90.
  • Each blank has an internal thread inside diameter d of 25.4 mm, an upper portion outside diameter D of 30.0 mm and a total height H of 19.0 mm.
  • Each of the engaging flaps 26 formed on the inner surface of the portion 20 had the following specification.
  • Thickness W 0.35 mm Length l1 of the lower edge 42 of the first portion 32: 1.9 mm Length l2 of the lower edge 44 of the second portion 34: 2.0 mm Inclination angle ⁇ : 50° Inclination angle ⁇ : 10° Inclination angle ⁇ : 30° Inclination angle ⁇ 1: 20° Inclination angle ⁇ 2: 45°
  • the upper edge 38 of the first portion 32 was of an arcuate shape having a radius of 0.5 mm, and the upper edge 40 of the second portion 34 was substantially horizontal.
  • Each of the blanks was mounted on the mouth-neck portion 62 of a glass container having the form shown in Figure 6 and a nominal diameter of 28 mm, and the required downwardly rotating torque was measured.
  • each of the engaging flaps 26 formed on the inner surface of the portion 20 had the form shown by the two-dot chain line in Figure 3 (namely, the second portion 34 was not bent with respect to the first portion 32 but extended in a straight line with the first portion 32).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
EP88116832A 1984-01-18 1985-01-17 Diebstahlsicherer Plastikverschluss für Behälter Withdrawn EP0308995A3 (de)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP59005756A JPS60158048A (ja) 1984-01-18 1984-01-18 ピルフア−プル−フ特性を有する合成樹脂製容器蓋
JP5756/84 1984-01-18
JP138904/84 1984-07-06
JP59138904A JPS6121355A (ja) 1984-07-06 1984-07-06 ピルフア−ブル−フ特性を有する合成樹脂製容器蓋
JP59224126A JPS61104959A (ja) 1984-10-26 1984-10-26 ピルフア−プル−フ特性を有する合成樹脂製容器蓋
JP224126/84 1984-10-26

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP85100467.1 Division 1985-01-17
EP85100467A Division EP0149496B1 (de) 1984-01-18 1985-01-17 Orginalitätsgesicherter Verschluss für Behälter

Publications (2)

Publication Number Publication Date
EP0308995A2 true EP0308995A2 (de) 1989-03-29
EP0308995A3 EP0308995A3 (de) 1989-04-05

Family

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Family Applications (2)

Application Number Title Priority Date Filing Date
EP85100467A Expired - Lifetime EP0149496B1 (de) 1984-01-18 1985-01-17 Orginalitätsgesicherter Verschluss für Behälter
EP88116832A Withdrawn EP0308995A3 (de) 1984-01-18 1985-01-17 Diebstahlsicherer Plastikverschluss für Behälter

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP85100467A Expired - Lifetime EP0149496B1 (de) 1984-01-18 1985-01-17 Orginalitätsgesicherter Verschluss für Behälter

Country Status (3)

Country Link
EP (2) EP0149496B1 (de)
KR (1) KR890002821B1 (de)
DE (1) DE3575115D1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507706A1 (de) * 1991-04-02 1992-10-07 Astra Plastique Schraubverschlusskappe mit Originalitätsband
EP0539316A2 (de) * 1991-09-20 1993-04-28 Dbi Plastics A/S Verschlusskappe für Entleerungsventile
US5413235A (en) * 1994-09-28 1995-05-09 Decelles; Gilles Tamper-evident closure

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1191796B (it) * 1986-05-30 1988-03-23 Guala Angelo Spa Chiusura di garanzia,per bottiglie di liquori e simili
DE3762328D1 (de) * 1986-07-11 1990-05-23 Interplastic Ag Sicherheitsband an einem gebindeverschluss.
GB8817365D0 (en) * 1988-07-21 1988-08-24 Metal Closures Ltd Container closure
DE4121618A1 (de) * 1991-06-29 1993-01-14 Alcoa Gmbh Verpackwerke Kunststoff-verschluss fuer behaelter
DK1397296T3 (da) 2001-06-18 2005-12-19 Bericap Holding Gmbh Skruehætte med sikringsbånd
DE102005025581A1 (de) * 2005-06-01 2006-12-07 Bericap Gmbh & Co. Kg Verschlußkappe mit integriertem Garantieband und Verfahren und Vorrichtung zu deren Herstellung
BR302014001174S1 (pt) 2013-09-18 2015-05-12 Bericap Configuração ornamental aplicada em tampa
FR3015442B1 (fr) 2013-12-24 2016-02-05 Bericap Dispositif de bouchage articule avec indicateur de premiere ouverture
USD833278S1 (en) 2014-09-03 2018-11-13 Bericap Closure for a container

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2529306A1 (de) * 1975-07-01 1977-02-10 Obrist Ag Albert Verfahren und vorrichtung zur herstellung eines garantieverschlusses
FR2457813A1 (fr) * 1979-05-31 1980-12-26 Grussen Jean Capsule a vis en matiere plastique pour bouteilles
FR2499519A1 (fr) * 1981-02-11 1982-08-13 Grussen Jean Capsule de bouchage a vis avec anneau d'inviolabilite
EP0073334A1 (de) * 1981-07-24 1983-03-09 H-C Industries, Inc. Verfahren und Vorrichtung zur Herstellung einer Verschlusskappe
US4418828A (en) * 1981-07-24 1983-12-06 H-C Industries, Inc. Plastic closure with mechanical pilfer band

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5832105B2 (ja) * 1979-11-10 1983-07-11 日本クラウンコルク株式会社 ピルフア−プル−フ特性を有する合成樹脂製容器蓋

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2529306A1 (de) * 1975-07-01 1977-02-10 Obrist Ag Albert Verfahren und vorrichtung zur herstellung eines garantieverschlusses
FR2457813A1 (fr) * 1979-05-31 1980-12-26 Grussen Jean Capsule a vis en matiere plastique pour bouteilles
FR2499519A1 (fr) * 1981-02-11 1982-08-13 Grussen Jean Capsule de bouchage a vis avec anneau d'inviolabilite
EP0073334A1 (de) * 1981-07-24 1983-03-09 H-C Industries, Inc. Verfahren und Vorrichtung zur Herstellung einer Verschlusskappe
US4418828A (en) * 1981-07-24 1983-12-06 H-C Industries, Inc. Plastic closure with mechanical pilfer band

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0507706A1 (de) * 1991-04-02 1992-10-07 Astra Plastique Schraubverschlusskappe mit Originalitätsband
FR2674823A1 (fr) * 1991-04-02 1992-10-09 Astra Plastique Bouchon a vis avec bague d'inviolabilite.
EP0539316A2 (de) * 1991-09-20 1993-04-28 Dbi Plastics A/S Verschlusskappe für Entleerungsventile
EP0539316A3 (en) * 1991-09-20 1993-08-04 Dbi Plastics A/S A protective cap for container discharge valves, in particular beer taps for draught beer kegs
US5413235A (en) * 1994-09-28 1995-05-09 Decelles; Gilles Tamper-evident closure

Also Published As

Publication number Publication date
EP0149496A3 (en) 1987-05-27
EP0149496A2 (de) 1985-07-24
EP0149496B1 (de) 1990-01-03
DE3575115D1 (de) 1990-02-08
KR890002821B1 (ko) 1989-08-04
EP0308995A3 (de) 1989-04-05
KR850005356A (ko) 1985-08-24

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