US20090120936A1 - Tamper-Evident Screw Closure for Containers and Bottles, Especially for Plastic Bottles - Google Patents

Tamper-Evident Screw Closure for Containers and Bottles, Especially for Plastic Bottles Download PDF

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Publication number
US20090120936A1
US20090120936A1 US11/991,732 US99173206A US2009120936A1 US 20090120936 A1 US20090120936 A1 US 20090120936A1 US 99173206 A US99173206 A US 99173206A US 2009120936 A1 US2009120936 A1 US 2009120936A1
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US
United States
Prior art keywords
tamper
evident
strip
screw closure
screw
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.)
Abandoned
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US11/991,732
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English (en)
Inventor
Thomas Karl Zauser
Oliver Hoch
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.)
Alpla Werke Alwin Lehner GmbH and Co KG
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Individual
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
Application filed by Individual filed Critical Individual
Assigned to ALPLA WERKE ALWIN LEHNER GMBH & CO. KG reassignment ALPLA WERKE ALWIN LEHNER GMBH & CO. KG ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HOCH, OLIVER, ZAUSER, THOMAS KARL
Publication of US20090120936A1 publication Critical patent/US20090120936A1/en
Abandoned legal-status Critical Current

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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
    • 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
    • B65D41/3442—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container
    • B65D41/3447—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt with rigid bead or projections formed on the tamper element and coacting with bead or projections on the container the tamper element being integrally connected to the closure by means of bridges

Definitions

  • the invention relates to a tamper-evident screw closure for containers and bottles, especially for plastic bottles, as claimed in the preamble of claim 1 .
  • plastic screw closures are generally produced in an injection molding process or in a diecasting process.
  • plastic closures are made as so-called tamper-evident screw closures.
  • the actual screw cap of the closure is connected to a ring-shaped, tamper-evident strip which is connected to the free edge of the jacket of the screw cap by breakaway webs. Intactness of the connection of the tamper-evident strip to the screw cap is designed to indicate that the closure has not been opened since the container or bottle was filled and sealed.
  • the peripheral flange generally to a certain extent also provides for the tamper-evident strip not being able to follow the axial motion of the screw cap and the breakaway sites being additionally broken open by the tensile loading between the screw cap and the tamper-evident strip.
  • the projections protruding from the inside wall of the tamper-evident strip are generally made wedge-shaped in the closing direction of rotation. This is designed to facilitate the tamper-evident screw closure being screwed on.
  • the protrusion of the projections over the inside wall of the tamper-evident strip is however only relatively small.
  • the tamper-evident strip must be made relatively narrow so that the projections protruding to the inside engage the corresponding projections on the wall of the neck of the bottle.
  • the tamper-evident screw closure fails completely with respect to its function of indicating intactness, and the impression can be engendered in the consumer that the contents of the container or bottle could have been tampered with.
  • many known tamper-evident screw closures after unscrewing the screw cap and screwing it back onto the container or bottle again it is not directly apparent that the container or bottle has already been opened once and the tamper-evident strip has already been separated. For the consumer this can lead to confusion which should be avoided.
  • EP-A-0 916 587 discloses a tamper-evident screw closure with a tamper-evident strip which has an internal edge bead and tabs which project radially to the inside. The tabs are coupled to the internal edge bead via an articulated bending region with a thinner cross section.
  • U.S. Pat. No. 4,748,735 discloses a similar tamper-evident screw closure with a tamper-evident strip which has tabs bent to the inside in the manner of fish hooks.
  • 2001/0015341 discloses a tamper-evident screw closure with a tamper-evident strip which is connected to the jacket edge of the closure via webs which are provided with scoring. Between the webs there are window-like openings in which there are wings which are bent to the inside in the manner of a pivot-hung window. The wings are coupled on the lower edge of the tamper-evident strip.
  • the tamper-evident screw closure described in GB-A-2 269 372 has a tamper-evident strip which is connected to the jacket of the screw closure via ribs provided with scoring.
  • blocking bodies which are made wedge-shaped projecting radially to the inside from the lower edge of the tamper-evident ring.
  • Material tapering which runs in the peripheral direction forms bending joints in the manner of film hinges for the wedge-shaped blocking bodies so that they can slide over an annular bead which runs peripherally on the bottle when the tamper-evident screw closure is pressed on.
  • the closure for milk bottles which is described in WO 97/35773 is not an actual screw closure. Rather it is a snap closure which can be unscrewed by turning.
  • the snap closure has two locking systems which are matched to a specially made bottle neck.
  • tamper-evident ring which is connected to the closure cap via thin joining webs which can be broken off. From the tamper-evident ring locking clips project radially to the inside and engage special recesses on the periphery of the neck of the bottle when the snap closure is put into place. Window-like recesses on the tamper-evident ring are intended to ensure the elasticity of the locking clips.
  • U.S. Pat. No. 6,325,227 B1 which forms the most similar prior art discloses a tamper-evident screw closure for bottles with a flange which runs peripherally in a ring shape on the neck of the bottle which has a screw cap and a tamper-evident strip which is molded on in one piece.
  • the screw cap has a cylindrical jacket.
  • the ring-shaped tamper-evident strip is provided with window-like recesses which extend between relative solid webs. In the contact region between the webs and the free lower edge of the jacket of the screw cap there are breakaway webs.
  • locking cams which are made wedge shaped extend radially to the inside.
  • the window-like recesses are formed in the production of the screw closure from laterally and radially movable slides which are delivered to the injection mold to form the wedge-shaped locking cams.
  • the structure and the production of the tamper-evident screw closures known from the prior art are relatively complex and expensive and dictate special injection tools with laterally and radially movable slides and the like.
  • the more complex structure of the molding tool results in elevated tool costs. Due to the required mechanical movements of the additional tool parts the cycle speeds for producing the tamper-evident rotary closures are relatively low. Due to the larger number of moving parts the injection tools do not have the desired long service lives either and are more susceptible to being repaired.
  • the object of this invention is therefore to remedy these disadvantages of the tamper-evident screw closures of the prior art.
  • a plastic tamper-evident screw closure for containers and bottles, especially for plastic bottles, will be devised with a tamper-evident strip which can be reliable separated from the screw cap during unscrewing without unduly great expenditure of force. Dimensional fluctuations of the neck of the container or bottle and lack of roundness of the neck are to be equalized. Mounting of the tamper-evident screw closure will be easily possible without increased pressing or untwisting forces.
  • the tamper-evident screw closure is designed to enable the consumer to more easily and reliably visually recognize intactness.
  • the invention devises a plastic tamper-evident screw closure for containers and bottles, especially plastic bottles, consisting of a screw cap which has a cylindrical jacket with an internal thread, and a ring-shaped tamper-evident strip which is connected via breakaway webs or the like to the free edge of the jacket and is equipped with locking elements which are made for positive engagement with an abutment which is made on the neck of the container or bottle.
  • the tamper-evident strip has an outside diameter which is smaller than that of the jacket of the screw cap.
  • the locking elements are formed by bevelled undercut regions of the tamper-evident strip which each run in the manner of a ring segment between two adjacent breakaway webs and which extend from the axially longer cylindrical inside wall to the axially shorter outside wall of the tamper-evident strip.
  • the locking elements are made for positive interaction with a peripherally running snap flange provided on the neck of the container or bottle and extend in the axial direction perpendicular to the unscrewing direction of the tamper-evident screw closure. To distinguish them from blocking elements made in the manner of a wing or tab, they extend in the peripheral direction between two adjacent breakaway webs.
  • the execution of the locking elements as claimed in the invention can equalize larger fluctuations of dimensions of the neck of the container or bottle and lack of roundness.
  • the forces acting on the breakaway webs are first of all tensile forces which are superimposed to a certain extent by shearing forces. Since there is no positive connection of the tamper-evident strip toward the wall of the neck and the tamper-evident strip when the tamper-evident screw closure is unscrewed does not experience friction on the neck, the unscrewing forces are relatively small.
  • the screw-on forces or press-on forces are comparatively small, since only towards the end of the mounting process do the ring segment-like undercut regions of the tamper-evident strip come into contact with the peripherally running snap flange on the neck of the container or bottle. Then the tamper-evident ring is stretched slightly in the radial direction beyond the undercut regions and finally will slide behind the snap flange. Due to the relatively small screw-on or press-on forces the breakaway webs need not be especially strong. This is expressed in turn in reduced unscrewing forces. The strength of the breakaway webs must be so great that they are not damaged upon removal from the mold and when the closure is applied or pressed onto the bottle neck.
  • the tamper-evident strip having a smaller outside diameter than the screw cap, in the mounted state of the tamper-evident screw closure its undercut regions are located as near as possible to the periphery of the neck without in doing so rubbing against it in the unscrewing motion. Due to the lower material use on the tamper-evident strip on the one hand there is sufficient elasticity in mold removal and when the bottle is closed, on the other hand, the functionality of the tamper-evident screw closure is ensured. Moreover material can be saved by this measure.
  • the tamper-evident screw closure made as claimed in the invention can be produced with relatively simple tools for example in an injection molding process or in a diecasting process. Movable slides or similar movable mold parts can be omitted in the molding tool. In this way the tool is mechanically less strongly loaded and it has a longer service life. Due to the lack of additional movable mold parts, faster production cycles can be achieved. The simpler execution of the tool directly benefits the tool costs.
  • the tamper-evident strip must have a certain strength and must still be elastic enough to be able to be radially widened when installed on the neck of the container or bottle until the undercut regions slide over the snap flange.
  • the wall thickness be roughly 40 to roughly 80% of the wall thickness of the cylindrical jacket of the screw cap in a thread-free region.
  • the beveled undercut region of the wall of the tamper-evident strip has an axial length which is 1 ⁇ 3 to 2 ⁇ 3 of the axial length of the breakaway webs.
  • the breakaway webs have an axial length which is 50% to 100% of the axial length of the outside wall of the tamper-evident strip adjoining the undercut region.
  • the length of the breakaway webs is such that the annular gap interrupted by the breakaway webs between the screw cap and the tamper-evident strip has a width from roughly 0.5 mm to roughly 5 mm.
  • the inside diameter measured on the undercut regions of the tamper-evident strip is feasibly larger than the inside diameter of the screw cap on the internal thread sections. This ensures that the tamper-evident strip can slide without obstruction over the outside thread on the neck of the bottle when the tamper-evident screw closure is mounted and tilting of the tamper-evident screw closure is prevented.
  • the locking elements In order to be able to preclude manipulation of the tamper-evident screw closure with high reliability, the locking elements must have a certain stiffness. This is ensured especially also by their ring segment-shaped extension in the peripheral direction. In this connection it is advantageous if the undercut regions which run in the manner of a ring segment between the breakaway webs have a peripheral extension which corresponds to 60% to 100% of the distance measured in the peripheral direction between two adjacent lengthwise edges of two adjacent breakaway webs.
  • Containers or plastic bottles which are equipped with a tamper-evident screw closure made as claimed in the invention are characterized in handling of the closure by the advantages described using the various versions of the tamper-evident screw closure.
  • One especially advantageous version calls for the region of the neck of the container or bottle in which the tamper-evident strip is located when the tamper-evident screw closure has been screwed on to have a longer axial extension than that of the tamper-evident strip. In this way the tamper-evident strip which has been separated the first time the tamper-evident screw closure is unscrewed can slide down somewhat on the neck. With the screw cap screwed on again, it is thus immediately apparent to the consumer that the tamper-evident screw closure has already been opened once.
  • FIGS. 1 and 2 show a side view and a top view of a tamper-evident screw closure of the prior art
  • FIG. 3 shows a section of the tamper-evident screw closure which has been screwed onto the neck of a container or bottle according to cutting line D-D in FIG. 2 ;
  • FIG. 4 shows a detail of the section from FIG. 3 ;
  • FIG. 5 shows a side view of a tamper-evident screw closure as claimed in the invention
  • FIG. 6 shows a section of the tamper-evident screw closure as shown in FIG. 5 ;
  • FIG. 7 shows a section of the tamper-evident screw closure as shown in FIG. 5 in the screw-on position
  • FIG. 8 shows a detail of the section from FIG. 7 ;
  • FIG. 9 shows a section of the tamper-evident screw closure as shown in FIG. 5 in the screwed-on state
  • FIG. 10 shows a detail of the section from FIG. 9 ;
  • FIG. 11 shows a section of the tamper-evident screw closure as shown in FIG. 5 in the state briefly before the breakaway webs break off;
  • FIG. 12 shows a detail of the section on FIG. 11 .
  • the tamper-evident screw closure of the prior art which is shown in FIGS. 1-4 in different views and sections is labelled with reference number 101 overall.
  • the figures show the tamper-evident screw closure 101 in the state screwed onto the neck of a container or bottle, the container being labelled 120 .
  • the tamper-evident screw closure 101 consists of a screw cap 102 with a jacket 103 and a tamper-evident strip 104 which is connected via the breakaway webs 105 to the screw cap 102 .
  • the tamper-evident strip 103 has the same outside diameter as the jacket 103 of the screw cap 102 .
  • Tamper-evident closures are also known in which the tamper-evident strip has a greater outside diameter than the screw cap.
  • the screw cap 102 and the tamper-evident strip 104 are produced in one piece in a plastic injection molding process or in a plastic diecasting process.
  • the jacket 103 of the screw cap 102 is provided on its outside with fluting or with axially running grooves 106 or the like which facilitate gripping and holding of the tamper-evident strip 101 .
  • FIG. 3 again 101 labels the tamper-evident screw closure with the screw cap 102 and the tamper-evident strip 104 .
  • the jacket of the screw cap 102 is labelled with reference number 103 .
  • On the edge of the jacket 103 which runs annularly the breakaway web is labelled with reference number 105 .
  • the container or the bottle 120 has a neck which is provided with reference number 121 .
  • External thread sections 122 on the neck 121 of the container or bottle engage the internal thread sections 107 of the jacket 103 of the screw cap 102 .
  • the neck 121 of the container or bottle is provided with projections 123 which interact with the corresponding profiling 108 which is made on the inside wall 109 of the tamper-evident strip 104 ( FIG. 4 ).
  • FIG. 4 shows the section surrounded by the broken line in FIG. 3 on a larger scale. It shows that the profiling 108 of the inside wall 109 of the jacket 103 is made for example as lengthwise grooves or axial strips which are engaged by the projections 123 which are located in a ring shape on the neck 121 of the container or bottle.
  • the projections 123 and profiling 108 form a rotary lock which becomes active when the tamper-evident screw closure 101 is unscrewed from the neck 121 of the container or bottle.
  • the lock prevents the tamper-evident strip 104 from turning concomitantly with the screw cap 102 and the breakaway webs 105 are finally sheared off upon further unscrewing.
  • annular bead 110 On the inside wall 109 of the tamper-evident strip 104 there is a peripheral annular bead 110 which prevents the separated tamper-evident strip 104 from dropping off the neck 121 of the container and bottle.
  • the annular bead 110 extends behind the projections 123 on the neck 121 of the container or bottle 121 and when the tamper-evident screw closure 101 is unscrewed supports the breaking of the breakaway webs 105 by its preventing the tamper-evident strip 104 from following the axial lifting motion of the screw cap 102 .
  • the tamper-evident screw closure as claimed in the invention which is shown in FIGS. 5 and 6 is labelled overall with reference number 1 . It comprises a screw cap 2 with a cylindrical jacket 3 and a tamper-evident strip 4 which is connected via breakaway webs 2 to the free edge of the jacket 3 of the screw cap 2 .
  • the outside surface of the jacket 3 is provided with fluting or with lengthwise ribs 6 or the like in order to facilitate gripping and holding of the tamper-evident screw closure when screwing onto or off of the neck of a container or bottle.
  • the tamper-evident strip 4 has an outside diameter which is smaller than the outside diameter of the jacket 3 of the screw cap 2 . As is apparent from FIGS.
  • the undercut regions 8 have an axial length t which is roughly 1 ⁇ 3 to 2 ⁇ 3 of the axial length s of the breakaway webs 5 . They each extend between two adjacent breakaway webs 5 .
  • the length of the breakaway webs 5 is especially such that an annular gap 9 between the screw cap 2 and the tamper-evident strip 4 which is interrupted in the peripheral direction by the breakaway webs 5 has a width which is roughly 0.5 to roughly 5 nm.
  • the width of the ring segment-like undercut regions 8 measured in the peripheral direction is roughly 60% to roughly 100% of the distance measured in the peripheral direction between two adjacent lengthwise edges of two adjacent breakaway webs.
  • FIGS. 7 and 8 and FIGS. 9 and 10 and FIGS. 11 and 12 show the tamper-evident screw closure in three different stages of screwing on and off with the pertinent detail of the area surrounded by the broken line.
  • the container or bottle is indicated by reference number 20 .
  • the neck of the bottle or container is labelled with reference number 21 .
  • FIGS. 7 and 8 show the tamper-evident screw closure 1 which is mounted for the first time on the neck 21 of the bottle.
  • the tamper-evident strip 4 which has a smaller outside diameter than the jacket 3 of the screw cap 2 is pressed over a snap flange 23 which is used as the abutment for the ring segment-like undercut regions 8 .
  • the tamper-evident strip 4 is elastically widened. Elasticity is ensured by the material, the smaller outside diameter of the tamper-evident strip 4 , and by the wall thickness of the tamper-evident strip 4 which is less compared to the relatively rigid screw cap 2 .
  • the tamper-evident strip 4 has a wall thickness b which is roughly 40% to 80% of the wall thickness a of the screw cap 2 in the region of its jacket ( FIG. 10 ).
  • the tamper-evident screw closure 1 is pressed on or screwed on.
  • the neck 21 of the container or bottle is provided with sections 22 of the external thread which engage the sections 7 of the internal thread on the screw cap 2 .
  • FIGS. 9 and 10 the tamper-evident screw closure 1 is mounted entirely on the neck 21 of the container or bottle.
  • the tamper-evident strip 4 and the breakaway webs 5 are intact and run in the immediate vicinity to the neck 21 of the container or bottle.
  • FIG. 9 clearly shows that the tamper-evident strip 4 has a smaller outside diameter than the jacket 3 of the screw cover 2 .
  • the ring segment-like undercut regions 8 of the tamper-evident strip 4 extend behind the snap bead 23 which runs peripherally on the neck 21 of the container or bottle.
  • the ring segment-like undercut regions 8 extend from an axially longer inside wall 42 to an axially shorter outside wall 41 of the tamper-evident strip 4 .
  • the breakaway webs 5 have an axial length which is 50% to 100% of the axial length of the outside wall 41 of the tamper-evident strip 4 which adjoins the undercut region 8 .
  • the region of the neck 21 of the container or bottle in the immediate vicinity of the tamper-evident strip 4 has a greater axial extension than the tamper-evident strip. In this way the tamper-evident strip 4 which has been separated from the screw cap 2 when unscrewed can slide down a few millimeters on the neck 21 of the container or bottle.
  • FIG. 11 and the detail in FIG. 12 finally show the tamper-evident screw closure 1 when unscrewed from the neck 21 of the container or bottle.
  • the undercut regions 8 which form a largely sharp-edged transition with the inside wall 42 of the tamper-evident strip 4 positively adjoin the bottom of the snap bead 23 .
  • the tamper-evident strip 4 is slightly widened by the tensile forces and by the bevel of the undercut regions 8 and is tilted to the outside. As the tamper-evident screw closure 1 continues to be unscrewed, the tensile forces acting on the tamper-evident strip 4 and the breakaway webs 5 increase. This is indicated in FIG.
  • the tamper-evident screw closure as claimed in the invention consists of plastic and can be produced for example in an injection molding process or in a diecasting process. Due to the simplicity of its construction it can be produced with relatively simple tools which have a smaller number of movable components. This results in longer service lives and faster cycle times.
  • the construction of the tamper-evident screw closure allows the consumer to ascertain directly and unmistakably whether the tamper-evident screw closure has already been opened once.
  • the tamper-evident screw closure has been explained on the example of a screw cap and a tamper-evident strip with a circular cross section.
  • the cross section of the screw cap can also be made polygonal or elliptical or egg-shaped or the like.
  • the screw cap can also have a double jacket.
  • the execution as claimed in the invention is referenced to the inside jacket.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Closures For Containers (AREA)
US11/991,732 2005-09-15 2006-08-12 Tamper-Evident Screw Closure for Containers and Bottles, Especially for Plastic Bottles Abandoned US20090120936A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH1500/05 2005-09-15
CH15002005 2005-09-15
PCT/EP2006/008008 WO2007031162A1 (de) 2005-09-15 2006-08-12 Garantieschraubverschluss für behälter und flaschen, insbesondere für kunststoffflaschen

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US20090120936A1 true US20090120936A1 (en) 2009-05-14

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Application Number Title Priority Date Filing Date
US11/991,732 Abandoned US20090120936A1 (en) 2005-09-15 2006-08-12 Tamper-Evident Screw Closure for Containers and Bottles, Especially for Plastic Bottles

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US (1) US20090120936A1 (pt)
EP (1) EP1926669A1 (pt)
BR (1) BRPI0616530A2 (pt)
WO (1) WO2007031162A1 (pt)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070138180A1 (en) * 2005-12-21 2007-06-21 Terry Vovan Enhanced tamper evident bowl with blocked tab
US20100065567A1 (en) * 2005-06-10 2010-03-18 Pwp Industries Tamper-evident container with extended band
US20100319331A1 (en) * 2009-01-16 2010-12-23 Wagner Wayne M Diesel Particulate Filter Regeneration System Including Shore Station
US8028851B2 (en) 2006-06-05 2011-10-04 Pwp Industries Enhanced tamper evident container with tear-apart parts
US8083089B2 (en) 2005-07-13 2011-12-27 Pwp Industries Inc. Versatile tamper-evident food container
US8127961B2 (en) 2007-11-10 2012-03-06 Pwp Industries Double ribbed secure container
US8146766B2 (en) 2009-04-29 2012-04-03 Pwp Industries Enhanced secure container
US8360262B2 (en) 2005-12-21 2013-01-29 Pactiv Packaging Inc. Integrated food packaging system having a cup, a container, and a cover
US8443999B1 (en) * 2012-04-16 2013-05-21 Robert C. Reinders Cap, cap/container combination
US20160297574A1 (en) * 2013-12-02 2016-10-13 Nestec S.A. Closure cap
US9475618B2 (en) 2012-10-11 2016-10-25 Capartis Ag Closing cap, container neck, tamper-evident closure, and method for producing a tamper-evident closure
US20160318673A1 (en) * 2015-04-28 2016-11-03 Brett D. Mouser Safe container package disposed on substrate
US11059633B2 (en) 2019-10-31 2021-07-13 Cheer Pack North America Flip-top closure for container

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Publication number Priority date Publication date Assignee Title
CH707198A1 (de) * 2012-11-08 2014-05-15 Alpla Werke Dosiersystem.

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US4748735A (en) * 1986-06-16 1988-06-07 Anchor Hocking Corporation Method of manufacturing tamper evident composite closure
US4899898A (en) * 1987-09-03 1990-02-13 Metal Closures Limited Closures for containers
US5131550A (en) * 1989-07-13 1992-07-21 Nigel Thompson Closures for containers
US5356020A (en) * 1992-03-12 1994-10-18 Mcg Closures Limited Container closure with tamper evident band
US20010015341A1 (en) * 1999-10-26 2001-08-23 Phillip Higgins Tamper evident closure
US6325227B1 (en) * 2000-03-20 2001-12-04 Phoenix Closures, Inc. Tamper-indicating closure with horizontal undercuts

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GB2269372A (en) * 1992-08-06 1994-02-09 Lawson Mardon Cap with tamper-evident band
GB2311285A (en) * 1996-03-22 1997-09-24 Beeson & Sons Ltd Snap-on, twist-off container closure assemblies

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Publication number Priority date Publication date Assignee Title
US4748735A (en) * 1986-06-16 1988-06-07 Anchor Hocking Corporation Method of manufacturing tamper evident composite closure
US4899898A (en) * 1987-09-03 1990-02-13 Metal Closures Limited Closures for containers
US5131550A (en) * 1989-07-13 1992-07-21 Nigel Thompson Closures for containers
US5356020A (en) * 1992-03-12 1994-10-18 Mcg Closures Limited Container closure with tamper evident band
US20010015341A1 (en) * 1999-10-26 2001-08-23 Phillip Higgins Tamper evident closure
US6325227B1 (en) * 2000-03-20 2001-12-04 Phoenix Closures, Inc. Tamper-indicating closure with horizontal undercuts

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8251242B2 (en) 2005-06-10 2012-08-28 Pwp Industries Tamper-evident container with extended band
US20100065567A1 (en) * 2005-06-10 2010-03-18 Pwp Industries Tamper-evident container with extended band
US8083089B2 (en) 2005-07-13 2011-12-27 Pwp Industries Inc. Versatile tamper-evident food container
US8851315B2 (en) 2005-07-13 2014-10-07 Pactiv Packaging Inc. Versatile tamper-evident food container
US8360262B2 (en) 2005-12-21 2013-01-29 Pactiv Packaging Inc. Integrated food packaging system having a cup, a container, and a cover
US8833589B2 (en) 2005-12-21 2014-09-16 Pactiv Packaging Inc. Enhanced tamper evident bowl with blocked tab
US20070138180A1 (en) * 2005-12-21 2007-06-21 Terry Vovan Enhanced tamper evident bowl with blocked tab
US8123064B2 (en) 2005-12-21 2012-02-28 Pwp Industries, Inc. Tamper evident container having a pull-open section
US8028851B2 (en) 2006-06-05 2011-10-04 Pwp Industries Enhanced tamper evident container with tear-apart parts
US8127961B2 (en) 2007-11-10 2012-03-06 Pwp Industries Double ribbed secure container
US20100319331A1 (en) * 2009-01-16 2010-12-23 Wagner Wayne M Diesel Particulate Filter Regeneration System Including Shore Station
US8146766B2 (en) 2009-04-29 2012-04-03 Pwp Industries Enhanced secure container
US8443999B1 (en) * 2012-04-16 2013-05-21 Robert C. Reinders Cap, cap/container combination
US9617045B2 (en) * 2012-04-16 2017-04-11 Robert C. Reinders Cap, cap/container combination
US9475618B2 (en) 2012-10-11 2016-10-25 Capartis Ag Closing cap, container neck, tamper-evident closure, and method for producing a tamper-evident closure
US20160297574A1 (en) * 2013-12-02 2016-10-13 Nestec S.A. Closure cap
US20160318673A1 (en) * 2015-04-28 2016-11-03 Brett D. Mouser Safe container package disposed on substrate
US11059633B2 (en) 2019-10-31 2021-07-13 Cheer Pack North America Flip-top closure for container

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WO2007031162A1 (de) 2007-03-22
BRPI0616530A2 (pt) 2011-06-21
EP1926669A1 (de) 2008-06-04

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