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
  • 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 Investigationieschraubver gleich for containers and bottles, in particular for plastic bottles, according to the preamble of patent claim 1.
• plastic screw caps are usually in a Spritzgiessverf ears or produced in a die-casting. Most plastic closures are designed as so-called Investigationieschraubver till.
• the actual screw cap of the closure is connected to an annular guarantee strip, which is connected to the free edge of the jacket of the screw cap via sole breaker webs.
• the circumferential flange usually also to a certain extent ensures that the guarantee band can not join the axial movement of the screw cap and the predetermined breaking points are additionally broken by the tensile load between the screw cap and the guarantee band.
• the projecting from the inner wall of the guarantee strip protrusions are usually wedge-shaped in the direction of closing. This is to facilitate the screwing on the InvestigationieschraubverBankes.
• the projection of the protrusions on the inner wall of the guarantee band is only relatively small.
• the guarantee strip must be made relatively narrow, so that the inwardly projecting projections come into engagement with the corresponding projections on therobonhalswandung. Due to the design, this results in a relatively large Aufschraubkraft that must be applied so that the first time screwing the warranty screw cap on a container or a bottle, the guarantee strip can be pressed with the protruding projections on the peripheral flange. So that the predetermined breaking webs do not break when the warranty screw cap is first screwed on, they must be of relatively stable design. This in turn results in a relatively large unscrewing force that must be applied so that when unscrewing the ISieschraubverInstitutes the guarantee strip is separated from the screw cap.
• the screw cap must be pulled and pulled many times until the guarantee strip loosens completely. Often then runs the guarantee band in part above the peripheral flange of the bottle neck, which is a hindrance when re-screwing the screw cap to close the container or the bottle. If the guarantee strip does not come loose from the screw cap, it can happen that the entire warranty screw cap is unscrewed unscrewed if the dimensions of the neck are larger. In this case, the warranty screw cap fails completely in its function of indicating integrity, and the consumer may be given the impression that the contents of the container or bottle may be tampered with.
• the guarantee band has a Congressrandwulst and radially inwardly projecting lobes.
• the flaps are articulated via an articulated bending area with a thinner cross-section at the inner edge bead.
• the guarantee band has fishhook-like inwardly bent lobes.
• the guarantee band is connected via predetermined webs provided with predetermined edges with the mantle edge of the closure.
• the ImplantieschraubverInstitut described in GB-A-2269372 has a guarantee strip, which is connected via predetermined ribs with the jacket of the screw cap. Between the relatively stable formed ribs protrude from a lower edge of the guarantee ring wedge-shaped locking body radially inwardly. In the circumferential direction material taper form filrnscharnierieri bending joints for the wedge-shaped locking body, so that they can slide when bouncing the Investigationieschraubver gleiches a circulating on the bottle annular bead.
• the closure for milk bottles described in WO 97/35773 is not an actual screw cap. Rather, it is a snap, which can be unscrewed by turning.
• the snap closure has two locking systems that are adapted to a specially designed neck. It is also a guarantee ring provided, which is connected via thin, breakable Anbindestege with the cap. From the guarantee ring locking tabs protrude radially inward, which engage when placing the snap closure in special recesses on the circumference of the bottle neck. Window-like recesses on the guarantee ring are intended to guarantee the elasticity of the locking straps.
• US-6,325,227 B1 which forms the closest prior art, discloses a guarantee screw cap for bottles with a flange which extends annularly around the neck of the bottle and has a screw cap and an integrally formed guarantee strip.
• the screw cap has a cylindrical shell.
• the ring-shaped guarantee strip is provided with window-like recesses which extend between relatively solid webs. In the contact region between the webs and the free lower edge of the jacket of the screw cap breakaway webs are provided.
• wedge-shaped locking cams extend radially inward.
• the window-like recesses are formed in the manufacture of the screw from laterally and radially adjustable slides, which are delivered to the formation of the wedge-shaped locking cam on the injection mold.
• the object is to create a plastic guarantee screw cap for containers and bottles, in particular for plastic bottles, the guarantee band of which can be separated reliably from the screw cap during unscrewing and without excessive expenditure of force.
• Mass variations of the neck of the container or the bottle and ovality of the neck should be able to be compensated.
• the installation of the Informieschraubver- lock should be easy and without increased Auf loft mechanism or Aufklell mechanism betechnikstelligbar.
• the warranty screw cap should allow the consumer to visibly and unambiguously recognize the integrity visually. He should be in one as simple and inexpensive tool in an injection molding or in a die-casting process to be produced. The service life of the tools should be higher than in machines for the production of the known Druckieschraubver barely. When manufacturing the warranty screw cap, material should be saved without compromising functionality and reliability.
• the invention provides a guarantee screw cap made of plastic for containers and bottles, in particular plastic bottles, consisting of a screw cap which has a cylindrical jacket with internal thread, and an annular guarantee strip which is connected via predetermined breaking webs or the like to the free edge of the shell and with locking elements equipped, which are designed for a positive engagement in a formed on a container or bottle neck abutment created.
• the guarantee strip has an outer diameter which is smaller than that of the jacket of the screw cap.
• the locking elements are formed by chamfered or chamfered undercut areas of the guarantee strip, each extending ring segment-like between two adjacent predetermined breaking webs and extending from an axially longer cylindrical inner wall to an axially shorter outer wall of the guarantee band.
• the locking elements are designed for positive cooperation with a peripheral flange provided on a container or bottleneck flange and extend in the axial direction perpendicular to the direction of twisting the Informieschraubver gleiches. In contrast to wing or flap-like barrier elements, they extend in the circumferential direction between two adjacent predetermined breaking webs.
• wing or flap-like barrier elements they extend in the circumferential direction between two adjacent predetermined breaking webs.
• Bottlenecks and out-of-roundness are compensated. As you continue to unscrew, the forces on the breakaway webs increase, and they always break off in the same quality and completely.
• the forces acting on the breakaway webs are primarily tensile forces, which are superimposed to some extent by shear forces. Since no positive connection of the guarantee band to
• Ruptured webs must be just large enough that they are not damaged during demolding and when applying or bouncing the closure on the bottleneck.
• the guarantee strip has a smaller outer diameter than the screw cap are in the assembled state of the InvestigationieschraubverInstitutes its undercut areas as close to the neck circumference arranged without rubbing during the unscrewing of this. Because of the lower use of material on the guarantee ring is on the one hand given sufficient elasticity during demolding and closure of a bottle and on the other hand still guarantees the functionality of the Informieschraubver gleiches. In addition, material can be saved by this measure.
• the guarantee screw lock formed according to the invention can be produced.
• adjustable slides or the like movable mold parts can be dispensed with in the mold.
• the tool is mechanically less heavily loaded and it has a longer service life.
• the simpler tool design also has an immediate beneficial effect on the cost of the tool.
• the guarantee strip must have a certain strength and yet be elastic enough to be able to be radially expanded during assembly onto the container or bottle neck until the undercut areas slide over the snap flange.
• a wall thickness proves to be advantageous , which is about 40% to about 80% of a wall thickness of the cylindrical shell of the screw cap in a thread-free area.
• the wall of the guarantee strip has an axial length which is 1/3 to 2/3 of an axial length of the predetermined breaking webs.
• the breakaway webs have an axial length which is 50% to 100% of the axial length of the adjoining to the undercut area outer wall of the guarantee band.
• the length of the predetermined breaking webs is dimensioned such that the interrupted by the breaking webs
• Annular gap between the screw cap and the guarantee strip has a width of about 0.5 mm to about 5 mm. For an even better recognition of the broken connections between the guarantee strip and the screw cap, it proves to be expedient if the separated guarantee strip can fall down a few millimeters at the container or bottleneck.
• An inner diameter measured at the undercut areas of the guarantee strip is expediently larger than the inner diameter of the screw cap at the inner thread sections. This ensures that the guarantee band can slide without obstruction over the external thread on the neck of the bottle during assembly of the guarantee screw cap and prevents tilting of the guarantee screw cap.
• the locking elements must have a certain rigidity. This is ensured, in particular, by its ring segment-shaped extent in the circumferential direction. It proves to be an advantage if the undercut segments extending in the manner of a ring segment between the breakaway webs have a circumferential extent which corresponds to 60% to 100% of the distance measured in the circumferential direction between two adjacent longitudinal edges of two adjacent breaker webs.
• Containers or plastic bottles which are equipped with a locking screw closure formed in accordance with the invention are characterized in the handling of the closure by the advantages described on the basis of the various design variants of the guarantee screw cap.
• a particularly advantageous variant provides that the area of the container neck or bottle neck, in which screwed! Informieschraubver gleich the guarantee strip is arranged, has a longer axial extent than that of the guarantee band.
• Fig. 1 and Fig. 2 is a side view and a plan view of a InvestigationieschraubverInstitutes of the prior art
• FIG. 3 is a sectional view of the screwed on a container or bottleneck InvestigationieschraubverInstitutes according to section line D - D in Fig. 2.
• Fig. 4 is a detail view of the section of Fig. 3;
• FIG. 6 is a sectional view of the InvestigationieschraubverInstitutes according to FIG. 5;
• FIG 7 is a sectional view of the InvestigationieschraubverInstitutes according to FIG 5 in a Aufschraubposition ..;
• Fig. 8 is a detail view of the section of Fig. 7;
• FIG. 9 is a sectional view of the ISieschraubverInstitutes according to Figure 5 in the screwed state ..;
• Fig. 10 is a detail view of the section of Fig. 9;
• FIG. 11 is a sectional view of the ISieschraubverInstitutes according to FIG. 5 in a state shortly before the breaking of the predetermined breaking webs.
• a state-of-the-art guarantee screw cap represented in various views and sections in FIGS. 1-4 bears the reference numeral 101 as a whole.
• the illustrations show the guarantee screw cap 101 in the state screwed onto a container or bottleneck, the container being indicated at 120 is.
• the ISieschraubver gleich 101 consists of a screw 102 with a jacket 103 and a guarantee strip 104 which is connected via predetermined breaking webs 105 with the screw 102.
• the guarantee band 103 has the same outer diameter as the shell 103 of the screw cap 102.
• the screw cap 102 and the guarantee strip 104 are manufactured 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 a Rif feiung or with axially extending grooves 106 or the like, which facilitate the gripping and holding the InvestigationieschraubverInstitutes 101.
• 101 designates again the guarantee screw cap with the screw cap 102 and the guarantee strip 104.
• the casing of the screw cap 102 bears the reference numeral 103.
• a predetermined breaking web is indicated by the reference numeral 105 on the annular edge of the casing 103.
• the container or the bottle 120 has a neck, which is provided with the reference numeral 121.
• Male thread portions 122 on the container or bottle neck 121 are in engagement with female threaded portions 107 of the shell 103 of the screw cap 102.
• the container neck or bottle neck 121 is provided with projections 123 which correspond with a cooperating profiling 108 which is formed on the inner wall 109 of the guarantee strip 104 (FIG. 4).
• Fig. 4 shows the dashed in Fig. 3 bounded section on a larger scale. It shows that the profiling 108 of the inner wall 109 of the shell 103 are formed, for example, as longitudinal grooves or axial strips, in which engage the annularly arranged on the container or bottle neck 121 projections 123.
• the projections 123 and the profilings 108 form a twist lock, which becomes effective when the warranty screw cap 101 is unscrewed from the container neck or bottle neck 121.
• the lock prevents the tamper-evident tape 104 from being locked
• a circumferential annular bead 110 is provided which prevents the detached guarantee strip 104 from falling off the container or bottleneck 121.
• the annular bead 110 engages behind the projections 123 on the container or bottle neck 121 and supports when unscrewing the InvestigationieschraubverInstitutes 101 breaking the breakaway webs 105, by preventing the guarantee strip 104 the axial lifting movement of the screw 102 participates.
• An inventive Investigationieschraubver gleich shown in FIGS. 5 and 6 is provided overall with the reference numeral 1. He surrounds a screw cap 2 with a cylindrical shell 3 and a guarantee strip 4, which is connected via predetermined breaking webs 5 with the free edge of the shell 3 of the screw cap 2.
• the outer surface of the shell 3 is provided with a reef elung or with longitudinal grooves 6 or the like to facilitate the gripping and holding the InformieschraubverInstitutes when unscrewing and screwing on a container or bottleneck.
• the guarantee strip 4 has an outer diameter which is smaller than an outer diameter of the jacket 3 of the screw cap 2.
• locking elements 4 are formed on the guarantee strip 4, which form the shape of chamfered or beveled undercut regions 8 exhibit.
• the undercut areas 8 have an axial length t, which is about 1/3 to 2/3 of an axial length s of the predetermined breaking webs 5. They each extend between two neighboring target Breaking webs 5.
• the length of the predetermined breaking webs 5 is in particular dimensioned such that an annular gap 9 between the screw cap 2 and the guarantee strip 4, which is interrupted in the circumferential direction in each case by the predetermined breaking webs 5, has a width which is about 0.5 mm to is about 5 mm.
• a circumferentially measured width of the ring segment-like undercut regions 8 is about 60% to about 100% of the circumferentially measured distance between two adjacent longitudinal edges of two adjacent breaker ridges.
• FIGS. 7 and 8 and FIGS. 9 and 10 and FIGS. 11 and 12 show the guarantee screw closure in three different screw-on or screw-off stages with associated detail representations of the area surrounded by a dashed line.
• the container or the bottle is indicated in each case by the reference numeral 20.
• the container or bottleneck bears the reference numeral 21.
• Fig. 7 and 8 show the Installerschraub closure 1, which is first mounted on the bottle neck 21.
• the guarantee strip 4 which has a smaller outer diameter than the shell 3 of the screw cap 2
• the guarantee strip 4 is elastically widened. The elasticity is ensured by the material, the smaller outside diameter of the guarantee band 4 and by the wall thickness of the guarantee band 4, which is smaller compared to the relatively rigid screw cap 2.
• the guarantee strip 4 has a wall thickness b which is about 40% to 80% of a wall thickness a of the screw cap 2 in the region of its jacket (FIG. 10).
• the warranty screw cap 1 is bounced or screwed on.
• the container or bottle neck 21 is provided for this purpose with male threaded portions 22 which engage in female threaded portions 7 on the screw cap 2.
• Figs. 9 and 10 the warranty screw cap 1 is completely mounted on the container or bottle neck 21.
• the guarantee strip 4 and the predetermined breaking webs 5 are intact and run in the immediate vicinity of the container or bottle neck 21. From FIG. 9 it can be clearly seen that the guarantee strip 4 has a smaller outer surface.
• the ring-segment-like undercut areas 8 of the guarantee strip 4 engage behind the container or bottle neck 21 circumferential snap bead 23.
• the detail in Fig. 9 shows that the ring segment-like undercut areas 8 of an axially longer inner wall 42nd extend to an axially shorter outer wall 41 of the guarantee strip 4.
• the predetermined breaking webs 5 have an axial length which amounts to 50% to 100% of the axial length of the outer wall 41 of the guarantee strip 4 adjoining an undercut area 8. It can also be seen that the area of the container or bottle neck 21 in the immediate vicinity of the guarantee strip 4 has a greater axial extent than the guarantee strip. This allows the separated during unscrewing of the screw cap 2 guarantee strip 4 on Be bachelorerectiv. Bottle neck 21 slip down a few millimeters.
• Fig. 11 and the detailed view in Fig. 12 finally show the Investigationieschraubver- final 1 when unscrewing from the container or bottle neck 21.
• the guarantee strip 4 is further tilted outwards and the positive connection of the undercut areas 8 with the snap bead 23 increases. A further increase in the tensile forces finally leads to a break-up connection of the breakaway webs 5 with the jacket 3 of the screw cap 2. This separates the guarantee strip 4 from the screw cap 2 and it can slide down on the container neck or bottleneck 21. The Schnappwulst 23 prevents the guarantee strip 4 can be lost. If the screw cap 2 is screwed onto the container or bottle neck 21 again, it is immediately apparent that the warranty screw cap 1 has already been opened.
• the warranty screw cap according to the invention is made of plastic and can be manufactured, for example, in an injection molding process or in a die casting process.
• the design of the warranty screw cap allows the consumer to immediately and unequivocally determine if the warranty screw cap has already been opened.
• the ISieschraubver gleich has been explained using the example of a screw cap and a guarantee band with a circular cross-section. It is understood that the cross section of the screw cap can also be polygonal or elliptical or egg-shaped or the like. This also applies analogously to the exterior design of the guarantee band. Also, the screw cap may have a double jacket.
• the inventive design is based on the inner shell.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Closures For Containers (AREA)

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Publications (1)

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Cited By (1)

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Citations (5)

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• 2006
  • 2006-08-12 US US11/991,732 patent/US20090120936A1/en not_active Abandoned
  • 2006-08-12 EP EP06776821A patent/EP1926669A1/de not_active Withdrawn
  • 2006-08-12 BR BRPI0616530-3A patent/BRPI0616530A2/pt not_active IP Right Cessation
  • 2006-08-12 WO PCT/EP2006/008008 patent/WO2007031162A1/de active Application Filing

Patent Citations (5)

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