US3673761A - Method of applying pilfer-proof closures - Google Patents

Method of applying pilfer-proof closures Download PDF

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Publication number
US3673761A
US3673761A US112735A US11273571A US3673761A US 3673761 A US3673761 A US 3673761A US 112735 A US112735 A US 112735A US 11273571 A US11273571 A US 11273571A US 3673761 A US3673761 A US 3673761A
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Prior art keywords
skirt portion
skirt
roller
security ring
failure line
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Expired - Lifetime
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US112735A
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English (en)
Inventor
Wilfried Leitz
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Novartis AG
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Ciba Geigy AG
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Publication date
Priority claimed from DE1779252A external-priority patent/DE1779252C3/de
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
    • B29B13/00—Conditioning or physical treatment of the material to be shaped
    • B29B13/02—Conditioning or physical treatment of the material to be shaped by heating
    • B29B13/023—Half-products, e.g. films, plates
    • B29B13/024—Hollow bodies, e.g. tubes or profiles
    • B29B13/025—Tube ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/007—Forming single grooves or ribs, e.g. tear lines, weak spots
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
    • B29C59/043—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for profiled articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/56—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits
    • B29C65/567—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B29C65/568—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using mechanical means or mechanical connections, e.g. form-fits using a tamping or a swaging operation, i.e. at least partially deforming the edge or the rim of a first part to be joined to clamp a second part to be joined using a swaging operation, i.e. totally deforming the edge or the rim of a first part to be joined to clamp a second part to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/65—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles with a relative motion between the article and the welding tool
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822—Transmission mechanisms
    • B29C66/8221—Scissor or lever mechanisms, i.e. involving a pivot point
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/824—Actuating mechanisms
    • B29C66/8244—Actuating mechanisms magnetically driven
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • 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
    • B65D41/3461—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being retracted by heat or by heat and pressure
    • B65D41/3466—Threaded or like caps or cap-like covers provided with tamper elements formed in, or attached to, the closure skirt the tamper element being retracted by heat or by heat and pressure and being integrally connected to the closure by means of bridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B3/00—Closing bottles, jars or similar containers by applying caps
    • B67B3/02—Closing bottles, jars or similar containers by applying caps by applying flanged caps, e.g. crown caps, and securing by deformation of flanges
    • B67B3/026—Closing bottles, jars or similar containers by applying caps by applying flanged caps, e.g. crown caps, and securing by deformation of flanges the caps being made of thermoplastic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67B—APPLYING CLOSURE MEMBERS TO BOTTLES JARS, OR SIMILAR CONTAINERS; OPENING CLOSED CONTAINERS
    • B67B3/00—Closing bottles, jars or similar containers by applying caps
    • B67B3/02—Closing bottles, jars or similar containers by applying caps by applying flanged caps, e.g. crown caps, and securing by deformation of flanges
    • B67B3/10—Capping heads for securing caps
    • B67B3/18—Capping heads for securing caps characterised by being rotatable, e.g. for forming screw threads in situ
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F2210/00—Perforating, punching, cutting-out, stamping-out, severing by means other than cutting of specific products
    • B26F2210/04—Making plastic pilferproof screw caps by cutting a tamper ring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
    • B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
    • B29C2035/046—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames dried air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/124—Tongue and groove joints
    • B29C66/1246—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove
    • B29C66/12461—Tongue and groove joints characterised by the female part, i.e. the part comprising the groove being rounded, i.e. U-shaped or C-shaped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
    • B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
    • 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 process for capping a container with a container cap incorporating a pilferproof seal in the form of a security ring joined to an upper portion of the cap across a failure line so that part of the ring can be rolled onto an undercut section of the container neck; the ring breaking away from the cap portion along the failure line on initial opening.
  • Rolled-on pilferproof caps are usually made of sheet metal such as aluminum which can be formed cold. The security ring is then cold rolled onto the undercut section of the container neck. Metal caps have several disadvantages, however, and there is a requirement for a similar type of cap made of plastic material.
  • a pilferproof closure member comprising a capping portion and joined thereto along a failure line of reduced strength a security ring which has adjacent said closure line an annular portion from which extends a skirt portion having a thickness less than that of the annular portion, the closure member being formed from plastic material and the thickness of the annular and skirt portions of the security ring being so chosen that application of heat and pressure to the skirt portion to roll it onto an undercut portion of the neck of a container to be closed by said closure member can be accomplished without the annular portion and the material along the failure line becoming plasticized and distorted.
  • the process for capping the neck of a container having an undercut portion to provide a pilferproof seal therefor comprises applying heat and pressure to plasticize the skirt portion and roll it onto the undercut portion, the supply of heat being controlled so as to prevent the annular portion becoming plasticized.
  • the process according to the invention thus utilizes a closure member incorporating a security ring divided into a thicker and a thinner zone with the required difference in mass. It has been found quite feasible to deform the thinner zone, that is the skirt portion, thermoplastically without softening the thicker one, that is the annular portion, so that the latter retains both its shape and strength. Local control of heat is not critical, although at least the same amount of heat should be supplied to the thinner zone per unit of volume as to the thicker one, preferably more.
  • FIG. 1 a closure-cap blank shaped according to the invention
  • FIGS. 2 to 4 the main stages in the process of capping a container according to the invention.
  • FIG. 5 a completed pilferproof closure
  • FIG. 6 the pilferproof closure during initial opening of the container
  • FIGS. 7 and 8 is an enlarged view of the skirt of a screw-cap blank in position on the container neck before shaping of the security ring (FIG. 7) and afterwards (FIG. 8),
  • FIG. 9 depicts a section perpendicular to the cap axis through the failure line
  • FIG. 10 is a schematic view of a means for monitoring the softness of the plastic material of the skirt and subsequently applying pressure
  • FIG. 11 is an enlarged sectional view similar to FIG. 4 showing the use of a notched cutting roller.
  • closure caps comprise two main parts, i.e. the actual cap 3 and a security ring 4 attached to it through webs 6 illustrated in plan view in FIG. 9, the section of the connecting portion between the portions of the cap being referred to as a failure line S.
  • the neck of a container marked 2 is provided with an annular beading 5 for locating the security ring.
  • the security ring 4 is made up of a thicker zone 4a and a thinner one 4b.
  • the cap blank is molded by conventional molding means with the failure line S present in the cap blank before the pilferproof seal is created as shown in FIG. 1.
  • a pilferproof seal for a container can be produced as illustrated in FIGS. 2 to 4, for instance.
  • the stages involve (a) screwing the cap blank 1 made of thermoplastic material as shown in FIG. 1 onto the container neck 2, (b) then applying pressure to the thinner zone of the security ring 4b by at least one roller 7 (FIG. 2), the pressure being adjusted so that it is suflicient to deform the zone of the ring 4b after it has been plasticized, (c) rotating either the container 2 complete with the screw cap 1 and/or the support of the roller 7 about the center line of the container or the cap, (d) blowing hot air onto the security ring zone 4b through at least one jet nozzle 8 until the zone has been plasticized (FIG.
  • a sensor can be used which continuously monitors the thermoplastic condition of the thinner zone 4b of the security ring as heat is being applied so that the deforming pressure can be exerted by a separate pressure applying means when an adequate degree of plasticity is detected.
  • FIG. 10 An example of a separate sensor and a separate pressure applying means is shown schematically in FIG. 10.
  • a sensing roller 105 is mounted on an am 104 pivoted at 103, and spring pressure is exerted on the arm 104 by a spring 106 to urge the arm 104 around the pivot 103 so as to urge the roller 105 toward the skirt portion 4b of the security ring on the cap 3.
  • Contacts 101 are disposed on the side of the arm 104 toward which it is urged by the spring 106, and the contacts are in a circuit with a power supply 102 and an electromagnet which is positioned opposite an armature 1000 on an arm 70 pivoted at 71 and carrying a pressure roller 7 at the free end thereof.
  • the supply of heat is interrupted at the latest simultaneously with the application of the deforming pressure or is at least reduced to such a degree that the temperature of the thinner zone 4b no longer rises.
  • An alternative solution involves subjecting the thinner zone 4b to the full deforming pressure from the moment heat is first applied so that as soon as the required degree of plasticity is detected pressure can take effect immediately and shaping then occurs suddenly.
  • the roller(s) 7 can be adapted to sense the thermoplastic condition of the thinner zone 4b so that they not only detect the softness of the thinner zone 4b but can also apply the deforming pressure to roll the thinner zone 4b over the beaded portion 5 of the container 2.
  • FIG. 5 The neck of the container with the completed pilferproof closure is shown in FIG. 5.
  • the upper part of the screw cap 3- which provides the actual closure-is of necessity sheared off from the security ring 4 along the failure line S, the ring remaining on the neck of the container as shown in FIG. 6.
  • FIG. 7 once again depicts part of the container neck 2 and the cap blank.
  • the zone 4a of the security ring 4 is twice the thickness of the zone 4b; in practice thickness ratios can vary from about 2:1 to 3:].
  • FIG. 8 also illustrates an enlarged section of the pilferproof closure after rolling the zone 4b of the security ring over the neck beading 5.
  • the portion connecting the cap 3 and the security ring 4 at which the failure line S is located is normally made up of slits and webs, the most successful design incorporating one web 6 which is weaker than the others. It has been demonstrated that such a design not only ensures a satisfactory connection between the security ring and the upper part of the cap but that it also considerably reduces the force needed to shear 011 the security ring during initial opening.
  • the web designated with 6' in FIG. 9 is weaker than the three others (6).
  • the thickness b of the webs 6 and 6' is preferably only a fraction of the wall thickness of the screw cap, the webs being set in from the outer surface of the cap.
  • the webs 6 and 6 can be formed in the cap blank when the cap blank is formed by conventional molding processes prior to its being placed on the container. However, it is also possible to form it as the cap is being acted on to secure it to the container.
  • a notched cutting roller 107 which is urged against the periphery of the cap blank between the cap 3 and the security ring 4 in order to form the failure line 8.
  • the notched cutting roller removes material from the cap leaving only the webs 6, which can be all the same size, or some of which can be slightly smaller than the others depending on the sizes of the notches in the roller 107.
  • the notched cutting roller 107 is applied to the cap after the cap blank is placed on the container, and at the latest when the pressure roller 7 is applied.
  • thermoplastic materials can be used for the closure cap, for example polystyrol. The majority of these plastics only retain their shape up to about 80 to 90 C.
  • the temperature of the hot air provided by the jet(s) 8 is best set to between 200 and 250 C. or between about 1.3 to 3.5 (preferably between about 2.2 to 3.1) times the temperature needed for plasticizing the thinner zone 4b.
  • the jet nozzle is positioned as close as possible to the zone being plasticized to reduce to a minimum the heat loss from the hot air. Since the temperature of this air is well above that required for plasticizing, the softening process is very short.
  • applying the shaping pressure to the thinner zone 4b virtually as soon as plasticizing takes place and interrupting or reducing the supply of heat or hot air as soon as the material becomes soft, the shaping of the thermoplastic material of the thinner zone 4b is already complete before the thicker zone 4a can distort.
  • the period of time during which heat is applied is adjusted, so that the supply of heat is stopped just before the plastic state is reached or at least reduced to such an extent that the temperature in the zone being shaped no longer rises.
  • the process timing can readily be adopted in mass production.
  • Switching the supply of hot air on and off or varying its intensity is best achieved by altering the distance between the jet nozzle and the zone being plasticized.
  • Optimum temperatures can be obtained by suitably adjusting the control sequence. solidification of the softened zone is achieved merely by interrupting or cutting down the supply of hot air coupled with the cooling effect of the pressure rollers 7.
  • rollers themselves for producing the plasticizing temperature, for instance by raising their rolling speed and slip to the point where the heat generated by friction becomes adequte for the purpose.
  • the speed of rotation of the screw cap (blank) or of the rollers, i.e. the relative speed, must then be increased to between 5,000 and 9,000 revolutions per minute.
  • closures illustrated in the drawings are all equipped with an internal screw thread but a cap without threads could obviously also be used. These screwless closures could be used in conjunction with an existing top, e.g. a stopper or an ordinary screw cap.
  • their security ring is rolled over the container-neck beading as described above. It is also possible to roll threads in smooth cap blanks using the container-neck thread as a former so that after the security ring has been broken away, the cap can be unscrewed.
  • a process for capping the neck of a container having an undercut portion to provide a pilferproof seal therefor comprising fomiing from plastic material a cap blank having a capping portion and having a security ring connected thereto along a failure line of reduced thickness, the security ring having adjacent said failure line an annular portion and extending therefrom a skirt portion having a uniform thickness around the entire periphery of at the most one-half that of the annular portion, placing said cap blank on the container, applying heat to plasticize the skirt portion by directing a jet of hot air at the skirt portion, monitoring continuously the plasticity of the skirt portion as said heat is being applied, applying a pressure to the outer surface of said thinner skirt portion by engaging the surface of a roller with the periphery of the skirt portion and moving the roller around the security ring in order to roll it under said undercut portion when a predetermined degree of plasticity is detected, and controlling the application of heat so that there is no substantial further increase in temperature of the skirt portion, whereby only the skirt portion is plasticized and the security
  • monitoring step is carried out by placing a monitoring means against said skirt which is responsive to the plasticity of the skirt, and operating said pressure applying roller only after said monitoring means senses that the material of the skirt portion has been plasticized.
  • a process for capping the neck of a container having an undercut portion to provide a pilferproof seal therefor comprising forming from plastic material a cap blank having a capping portion and having a security ring thereon of substantially the same thickness as that of said capping portion, the security ring being comprised of an annular portion and extending therefrom a skirt portion having a uniform thickness around the entire periphery of at the most one-half that of the annular portion, placing said cap blank on the container, applying heat to plasticize the skirt portion by directing a jet of hot air at the skirt portion, monitoring continuously the plasticity of the skirt portion as said heat is being applied, applying a pressure to the outer surface of said thinner skirt portion by engaging the surface of a roller with the periphery of the skirt portion and moving the roller around the security ring in order to roll it under said undercut portion when a to the security ring, whereby only the skirt portion is plasticized and the temperature of the annular portion and the material at the failure line of the cap blank is prevented from rising to the plastic material

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Closures For Containers (AREA)
  • Sealing Of Jars (AREA)
  • Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
US112735A 1968-03-30 1971-02-04 Method of applying pilfer-proof closures Expired - Lifetime US3673761A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEL0047079 1968-03-30
DE1779252A DE1779252C3 (de) 1968-07-23 1968-07-23 Verfahren und Vorrichtung zum Anbringen eines Behalterverschlusses auf einer Behältermündung

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BE (1) BE730697A (enrdf_load_stackoverflow)
BR (1) BR6907674D0 (enrdf_load_stackoverflow)
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Cited By (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773205A (en) * 1971-03-04 1973-11-20 Klm Co Stratford Thermoformed closures which are sealed to containers by the use of sonic energy and the method of sealing the same
US3788509A (en) * 1972-01-28 1974-01-29 Klm Co Method and apparatus for sealing plastic closures to plastic containers
US3944102A (en) * 1972-04-05 1976-03-16 Hermann Grau Safety screw closure
US4021524A (en) * 1975-08-15 1977-05-03 American Can Company Method of making a collapsible tube with an integral cap
US4033472A (en) * 1974-08-19 1977-07-05 Albert Obrist Ag Closure for containers
US4103900A (en) * 1975-09-08 1978-08-01 Goldwell Gmbh Chemische Fabrik H.E. Dotter Originality seal for disposable receptacles
US4106622A (en) * 1977-08-01 1978-08-15 Sherwood Medical Industries Inc. Tamper-resistant rigid syringe package and method of making the same
US4126240A (en) * 1975-07-10 1978-11-21 Zeller Plastik Tamper indicating closure
US4147268A (en) * 1976-09-24 1979-04-03 Patel Chandrakant S Pilfer-proof closure for containers
US4190169A (en) * 1979-01-15 1980-02-26 Pehr Harold T Tamperproof package
US4206851A (en) * 1979-02-23 1980-06-10 Ethyl Products Company Tamperproof closure
US4206852A (en) * 1979-01-26 1980-06-10 Aluminum Company Of America Linerless closure for pressurized container
US4291813A (en) * 1978-02-17 1981-09-29 Buckeye Molding Company Containers and closures
US4345692A (en) * 1980-02-14 1982-08-24 Albert Obrist Ag Closure cap for a container
US4346811A (en) * 1978-03-28 1982-08-31 Captocap Limited Pilfer-proof closure cap of plastic material
US4378893A (en) * 1979-09-21 1983-04-05 H-C Industries, Inc. Composite closure
WO1983002436A1 (en) * 1982-01-19 1983-07-21 Merctech Inc Safety cap for container particularly for medicines
US4401227A (en) * 1981-08-17 1983-08-30 Pehr Harold T Tamper indicating closure cap
US4444329A (en) * 1982-09-29 1984-04-24 Vollers Gary L Container cap and seal formation of indicia
US4461390A (en) * 1980-04-21 1984-07-24 General Kap (P.R.) Corporation Tamper-evident plastic closure
US4487329A (en) * 1983-10-13 1984-12-11 Maryland Cup Corporation Tamper-evident closure
DE3323487A1 (de) * 1983-06-30 1985-01-03 Alcoa Deutschland Gmbh Verpackungswerke, 6520 Worms Verschlusskappe fuer einen behaelterhals mit gegenring aus einem formteil aus thermoplastischem material mit einem kontrollring sowie verfahren zu dessen herstellung und verfahren zum verschliessen eines behaelterhalses mit einer solchen verschlusskappe
US4497765A (en) * 1979-09-21 1985-02-05 H-C Industries, Inc. Process for making a closure
US4506795A (en) * 1983-02-18 1985-03-26 Kerr Glass Manufacturing Corporation Tamper-evident closure
US4511054A (en) * 1984-04-13 1985-04-16 Kerr Glass Manufacturing Corporation Tamper-evident closure and method of manufacture
US4526282A (en) * 1983-05-05 1985-07-02 Sun Coast Plastics, Inc. Tamper proof closure cap, method, and tool for making same
US4545496A (en) * 1981-07-24 1985-10-08 H-C Industries, Inc. Plastic closure with mechanical pilfer band
US4546893A (en) * 1984-10-22 1985-10-15 Gene Stull Tamper-evident closure cap construction
US4549667A (en) * 1984-03-15 1985-10-29 Owens-Illinois, Inc. Tamper indicating package
US4552328A (en) * 1984-01-05 1985-11-12 Sun Coast Plastics, Inc. Mold for making tamper-proof closure
EP0132154A3 (en) * 1983-07-19 1985-12-18 National Plastics Limited Container closure
US4595547A (en) * 1983-02-18 1986-06-17 Kerr Glass Manufacturing Corporation Method of manufacturing a tamper evident closure
US4604853A (en) * 1984-12-03 1986-08-12 Aluminum Company Of America Method and apparatus for sealing a container with a tamper-evident closure
EP0239176A2 (en) 1983-02-18 1987-09-30 Kerr Glass Manufacturing Corporation Tamper-evident closures
US4697714A (en) * 1985-02-04 1987-10-06 Tbl Development Corporation Break-away container closure
US4706828A (en) * 1986-09-19 1987-11-17 Kardon Industries Tamper resistant cap
US4767587A (en) * 1985-02-04 1988-08-30 Tbl Development Corporation Method for making a break-away container closure
US4771923A (en) * 1987-11-03 1988-09-20 Kardon Industries, Inc. Tamper evidencing cap
US4881656A (en) * 1988-10-24 1989-11-21 Sandusky Plastics, Inc. Tamper evident container lid and method of making the same
USD311494S (en) 1987-08-24 1990-10-23 Kardon Industries, Inc. Bottle closure
US5253772A (en) * 1991-05-21 1993-10-19 Sweetheart Cup Company, Inc. Tamper evident container assembly
US5400913A (en) * 1992-12-23 1995-03-28 Crown Cork & Seal Company Tamper-indicating closure
US5405032A (en) * 1992-11-06 1995-04-11 Crown Cork & Seal Company, Inc. Tamper indicating closure and method and device for the manufacture of a tamper-indicating closure
US5490827A (en) * 1991-05-21 1996-02-13 Sweetheart Cup Company, Inc. Tamper evident container and related apparatus
EP0698559A2 (en) 1994-08-24 1996-02-28 Kerr Group, Inc. Tamper-evident closure and tamper-evident closure and container combination
US5575967A (en) * 1995-02-17 1996-11-19 Sunbeam Plastics Corporation Method of forming a tamper indicating closure
US5651299A (en) * 1994-03-08 1997-07-29 H-C Industries, Inc. Method for scoring a tamper-indicating plastic closure
US5658228A (en) * 1992-04-30 1997-08-19 Sweetheart Cup Company, Inc. Tamper evident container and related apparatus
US5685444A (en) * 1995-09-19 1997-11-11 Valley; Joseph P. Tamper-evident hinged closure cap construction
WO1999033618A1 (de) * 1997-12-29 1999-07-08 Alcoa Deutschland Gmbh Verpackungswerke SCHNEIDVORRICHTUNG FÜR EINEN KUNSTSTOFFVERSCHLUss
US6089390A (en) * 1992-07-16 2000-07-18 Closures And Packaging Services Limited Tamper evident closure
WO2002046043A1 (en) * 2000-12-08 2002-06-13 Becton Dickinson And Company Method of sealing medical container with a plastic closure
US6527132B1 (en) 1997-07-14 2003-03-04 Closures And Packaging Services Limited Closure with extended seal member
US20040200796A1 (en) * 2001-10-04 2004-10-14 Lucas Philip J. Method of sealing a container
EP1782915A3 (en) * 2003-06-19 2007-11-07 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Device for positioning a tool
US20150239009A1 (en) * 2012-08-03 2015-08-27 Homag Holzbearbeitungssysteme Gmbh Method and device for coating workpieces
US20180244416A1 (en) * 2015-10-05 2018-08-30 Tetra Laval Holdings & Finance S.A. An applying unit for applying a lid onto a container
US20190084728A1 (en) * 2017-09-18 2019-03-21 Ball Corporation Tamper evidence device for roll-on pilfer proof closures
WO2021191486A1 (es) 2020-03-27 2021-09-30 Jose Francisco Gonzalez Sanchez Tapón de cierre para envases
US12297011B2 (en) 2023-04-05 2025-05-13 Husky Injection Molding Systems Ltd. Method of securing a closure on a container

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322009A (en) * 1980-05-19 1982-03-30 Owens-Illinois, Inc. Tamper proof molded plastic closure
NL8802618A (nl) * 1988-10-25 1990-05-16 Kornelis Kunsthars Prod Ind Bv Garantiesluiting.

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US2669740A (en) * 1949-04-16 1954-02-23 Charles E Main Combined closure cap and brush dispenser
US3415403A (en) * 1966-12-14 1968-12-10 Bennett Ind Inc Closure apparatus

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FR1075405A (fr) * 1952-02-23 1954-10-15 Procédé pour l'obturation de bouteilles, avec son dispositif correspondant
FR1398069A (fr) * 1964-03-25 1965-05-07 Alca Sa Procédé pour le capsulage de récipients ou bouteilles et capsule obtenue
FR1462395A (fr) * 1965-11-03 1966-04-15 Rhone Poulenc Sa Nouvelle bague pour la fixation d'une valve sur un flacon pulvérisateur en matièreplastique et procédé pour son sertissage

Patent Citations (2)

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Publication number Priority date Publication date Assignee Title
US2669740A (en) * 1949-04-16 1954-02-23 Charles E Main Combined closure cap and brush dispenser
US3415403A (en) * 1966-12-14 1968-12-10 Bennett Ind Inc Closure apparatus

Cited By (72)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3773205A (en) * 1971-03-04 1973-11-20 Klm Co Stratford Thermoformed closures which are sealed to containers by the use of sonic energy and the method of sealing the same
US3788509A (en) * 1972-01-28 1974-01-29 Klm Co Method and apparatus for sealing plastic closures to plastic containers
US3944102A (en) * 1972-04-05 1976-03-16 Hermann Grau Safety screw closure
US4033472A (en) * 1974-08-19 1977-07-05 Albert Obrist Ag Closure for containers
US4126240A (en) * 1975-07-10 1978-11-21 Zeller Plastik Tamper indicating closure
US4021524A (en) * 1975-08-15 1977-05-03 American Can Company Method of making a collapsible tube with an integral cap
US4103900A (en) * 1975-09-08 1978-08-01 Goldwell Gmbh Chemische Fabrik H.E. Dotter Originality seal for disposable receptacles
US4147268A (en) * 1976-09-24 1979-04-03 Patel Chandrakant S Pilfer-proof closure for containers
US4106622A (en) * 1977-08-01 1978-08-15 Sherwood Medical Industries Inc. Tamper-resistant rigid syringe package and method of making the same
US4291813A (en) * 1978-02-17 1981-09-29 Buckeye Molding Company Containers and closures
US4346811A (en) * 1978-03-28 1982-08-31 Captocap Limited Pilfer-proof closure cap of plastic material
US4190169A (en) * 1979-01-15 1980-02-26 Pehr Harold T Tamperproof package
US4206852A (en) * 1979-01-26 1980-06-10 Aluminum Company Of America Linerless closure for pressurized container
US4206851A (en) * 1979-02-23 1980-06-10 Ethyl Products Company Tamperproof closure
US4378893A (en) * 1979-09-21 1983-04-05 H-C Industries, Inc. Composite closure
US4497765A (en) * 1979-09-21 1985-02-05 H-C Industries, Inc. Process for making a closure
US4345692A (en) * 1980-02-14 1982-08-24 Albert Obrist Ag Closure cap for a container
US4461390A (en) * 1980-04-21 1984-07-24 General Kap (P.R.) Corporation Tamper-evident plastic closure
US4545496A (en) * 1981-07-24 1985-10-08 H-C Industries, Inc. Plastic closure with mechanical pilfer band
US4401227A (en) * 1981-08-17 1983-08-30 Pehr Harold T Tamper indicating closure cap
WO1983002436A1 (en) * 1982-01-19 1983-07-21 Merctech Inc Safety cap for container particularly for medicines
US4444329A (en) * 1982-09-29 1984-04-24 Vollers Gary L Container cap and seal formation of indicia
US4506795A (en) * 1983-02-18 1985-03-26 Kerr Glass Manufacturing Corporation Tamper-evident closure
EP0239176A2 (en) 1983-02-18 1987-09-30 Kerr Glass Manufacturing Corporation Tamper-evident closures
US4595547A (en) * 1983-02-18 1986-06-17 Kerr Glass Manufacturing Corporation Method of manufacturing a tamper evident closure
US4526282A (en) * 1983-05-05 1985-07-02 Sun Coast Plastics, Inc. Tamper proof closure cap, method, and tool for making same
DE3323487A1 (de) * 1983-06-30 1985-01-03 Alcoa Deutschland Gmbh Verpackungswerke, 6520 Worms Verschlusskappe fuer einen behaelterhals mit gegenring aus einem formteil aus thermoplastischem material mit einem kontrollring sowie verfahren zu dessen herstellung und verfahren zum verschliessen eines behaelterhalses mit einer solchen verschlusskappe
US4565293A (en) * 1983-07-19 1986-01-21 National Plastics Limited Container closure
EP0132154A3 (en) * 1983-07-19 1985-12-18 National Plastics Limited Container closure
US4487329A (en) * 1983-10-13 1984-12-11 Maryland Cup Corporation Tamper-evident closure
EP0138592A3 (en) * 1983-10-13 1986-08-13 Maryland Cup Corporation Tamper-evident closure for a container
US4552328A (en) * 1984-01-05 1985-11-12 Sun Coast Plastics, Inc. Mold for making tamper-proof closure
US4549667A (en) * 1984-03-15 1985-10-29 Owens-Illinois, Inc. Tamper indicating package
US4511054A (en) * 1984-04-13 1985-04-16 Kerr Glass Manufacturing Corporation Tamper-evident closure and method of manufacture
US4546893A (en) * 1984-10-22 1985-10-15 Gene Stull Tamper-evident closure cap construction
US4604853A (en) * 1984-12-03 1986-08-12 Aluminum Company Of America Method and apparatus for sealing a container with a tamper-evident closure
US4697714A (en) * 1985-02-04 1987-10-06 Tbl Development Corporation Break-away container closure
US4767587A (en) * 1985-02-04 1988-08-30 Tbl Development Corporation Method for making a break-away container closure
US4706828A (en) * 1986-09-19 1987-11-17 Kardon Industries Tamper resistant cap
USD311494S (en) 1987-08-24 1990-10-23 Kardon Industries, Inc. Bottle closure
US4771923A (en) * 1987-11-03 1988-09-20 Kardon Industries, Inc. Tamper evidencing cap
US4881656A (en) * 1988-10-24 1989-11-21 Sandusky Plastics, Inc. Tamper evident container lid and method of making the same
US5653382A (en) * 1991-05-21 1997-08-05 Sweetheart Cup Company, Inc. Tamper evident container and related apparatus
US5253772A (en) * 1991-05-21 1993-10-19 Sweetheart Cup Company, Inc. Tamper evident container assembly
US5490827A (en) * 1991-05-21 1996-02-13 Sweetheart Cup Company, Inc. Tamper evident container and related apparatus
US5658228A (en) * 1992-04-30 1997-08-19 Sweetheart Cup Company, Inc. Tamper evident container and related apparatus
US6089390A (en) * 1992-07-16 2000-07-18 Closures And Packaging Services Limited Tamper evident closure
US6705479B2 (en) 1992-07-16 2004-03-16 Closures And Packaging Services Limited Tamper evident closure
US6325225B1 (en) 1992-07-16 2001-12-04 Closures And Packaging Services Limited Tamper evident closure
US5405032A (en) * 1992-11-06 1995-04-11 Crown Cork & Seal Company, Inc. Tamper indicating closure and method and device for the manufacture of a tamper-indicating closure
US5400913A (en) * 1992-12-23 1995-03-28 Crown Cork & Seal Company Tamper-indicating closure
US5651299A (en) * 1994-03-08 1997-07-29 H-C Industries, Inc. Method for scoring a tamper-indicating plastic closure
EP0698559A2 (en) 1994-08-24 1996-02-28 Kerr Group, Inc. Tamper-evident closure and tamper-evident closure and container combination
US5575967A (en) * 1995-02-17 1996-11-19 Sunbeam Plastics Corporation Method of forming a tamper indicating closure
US5685444A (en) * 1995-09-19 1997-11-11 Valley; Joseph P. Tamper-evident hinged closure cap construction
US6527132B1 (en) 1997-07-14 2003-03-04 Closures And Packaging Services Limited Closure with extended seal member
US20030116523A1 (en) * 1997-07-14 2003-06-26 Closures And Packaging Services Limited Closure with extended seal member
US6991123B2 (en) 1997-07-14 2006-01-31 Closures And Packaging Services Limited Closure with extended seal member
WO1999033618A1 (de) * 1997-12-29 1999-07-08 Alcoa Deutschland Gmbh Verpackungswerke SCHNEIDVORRICHTUNG FÜR EINEN KUNSTSTOFFVERSCHLUss
US6681475B2 (en) 1998-04-20 2004-01-27 Becton Dickinson And Company Method of sealing a medical container with a plastic closure
WO2002046043A1 (en) * 2000-12-08 2002-06-13 Becton Dickinson And Company Method of sealing medical container with a plastic closure
US6957524B2 (en) * 2001-10-04 2005-10-25 Coors Global Properties, Inc. Method of sealing a container
US20040200796A1 (en) * 2001-10-04 2004-10-14 Lucas Philip J. Method of sealing a container
EP1782915A3 (en) * 2003-06-19 2007-11-07 Sacmi Cooperativa Meccanici Imola Societa' Cooperativa Device for positioning a tool
US20150239009A1 (en) * 2012-08-03 2015-08-27 Homag Holzbearbeitungssysteme Gmbh Method and device for coating workpieces
US10807121B2 (en) * 2012-08-03 2020-10-20 Homag Gmbh Method and device for coating workpieces
US20180244416A1 (en) * 2015-10-05 2018-08-30 Tetra Laval Holdings & Finance S.A. An applying unit for applying a lid onto a container
US10351286B2 (en) * 2015-10-05 2019-07-16 Tetra Laval Holdings & Finance S.A. Applying unit for applying a lid onto a container
US20190084728A1 (en) * 2017-09-18 2019-03-21 Ball Corporation Tamper evidence device for roll-on pilfer proof closures
WO2021191486A1 (es) 2020-03-27 2021-09-30 Jose Francisco Gonzalez Sanchez Tapón de cierre para envases
EP4129853A1 (en) * 2020-03-27 2023-02-08 Jose Francisco Gonzalez Sanchez Closing cap for containers
US12297011B2 (en) 2023-04-05 2025-05-13 Husky Injection Molding Systems Ltd. Method of securing a closure on a container

Also Published As

Publication number Publication date
CH505005A (de) 1971-03-31
BE730697A (enrdf_load_stackoverflow) 1969-09-29
AT292490B (de) 1971-08-25
NL6904879A (enrdf_load_stackoverflow) 1969-10-02
SE358370B (enrdf_load_stackoverflow) 1973-07-30
JPS546957B1 (enrdf_load_stackoverflow) 1979-04-02
BR6907674D0 (pt) 1973-01-30
GB1254930A (en) 1971-11-24
FR2005154A1 (en) 1969-12-05

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