US2937481A - Method of producing a package - Google Patents

Method of producing a package Download PDF

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US2937481A
US2937481A US74312158A US2937481A US 2937481 A US2937481 A US 2937481A US 74312158 A US74312158 A US 74312158A US 2937481 A US2937481 A US 2937481A
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bottle
diaphragm
neck
material
border
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Palmer Jack
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Fr Corp
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Fr Corp
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B29C66/7232General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer
    • B29C66/72321General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered comprising a non-plastics layer consisting of metals or their alloys
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3644Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a ribbon, band or strip
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3656Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint being a layer of a multilayer part to be joined, e.g. for joining plastic-metal laminates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3672Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint
    • B29C65/3676Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic
    • B29C65/368Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the composition of the elements heated by induction which remain in the joint being metallic with a polymer coating
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7858Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus characterised by the feeding movement of the parts to be joined
    • B29C65/7861In-line machines, i.e. feeding, joining and discharging are in one production line
    • B29C65/787In-line machines, i.e. feeding, joining and discharging are in one production line using conveyor belts or conveyor chains
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112Single lapped joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/10Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114Single butt joints
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/05Particular design of joint configurations
    • B29C66/20Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General 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
    • B29C66/51Joining 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
    • B29C66/53Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/81General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8181General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the cooling constructional aspects
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65BMACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B51/00Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10Applying or generating heat or pressure or combinations thereof
    • B65B51/22Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding
    • B65B51/227Applying or generating heat or pressure or combinations thereof by friction or ultrasonic or high-frequency electrical means, i.e. by friction or ultrasonic or induction welding by induction welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS 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
    • B65D41/00Caps, 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
    • B65D41/02Caps or cap-like covers without lines of weakness, tearing strips, tags, or like opening or removal devices
    • B65D41/04Threaded or like caps or cap-like covers secured by rotation
    • B65D41/0435Threaded or like caps or cap-like covers secured by rotation with separate sealing elements
    • B65D41/045Discs
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/80General aspects of machine operations or constructions and parts thereof
    • B29C66/82Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
    • B29C66/822Transmission mechanisms
    • B29C66/8223Worm or spindle mechanisms

Description

May 24, 1960 J. PALMER 2,937,481

METHOD OF PRODUCING A PACKAGE Filed June 19, 1958 (28 ATTORNEY United States Patent O METHOD F PRODUCING A PACKAGE Jack Palmer, Bronx, N.Y., assignor to The FR Corporation, New York, N.Y., a corporation of New York Filed June 19, 1958, Ser. No. 743,121

Claims.v (Cl. 53--39) The present invention relates generally to the art of packaging, and in particular it relates to an improved method for the bottling of liquids in an hermetically sealed state, and to the improved resulting package.

In the packaging or bottling of liquids, it is frequently desirable or necessary to effect positive hermetic sealing of the liquid carrying receptacle. Such sealing is particularly required in cases where the packaged liquid deteriorates on exposure to air, or is of a corrosive, toxic, inilamm-able or explosive nature. When the liquid is packaged in a glass bottle having a threaded neck and provided with a screw cap, the use of a resilient disc shaped or annular gasket between the cap top and the upper edge of the bottle neck effects a satisfactory hermetic seal as long as the screw cap is tight. However, the seal is broken at the mere loosening of the cap. It has been proposed to cement the gasket to the top of the bottle neck by means of various adhesives. However, such an expedient is highly unfeasible in many cases and possesses numerous drawbacks and disadvantages. The above methods cannot be satisfactorily applied to the sealing of liquid-containing thermoplastic bottles since the occurrence of non-hermetic seals is much too frequent.

It is thus a principal object of the present invention to provide an improved method of packaging.

Another object of the present invention is to provide an improved method for hermetically sealing bottled liquids.

A further object of the present invention is to provide an improved method for hermetically sealing liquids in plastic bottles.

A further object of the present invention is to provide an improved method of hermetically sealing bottled liquids quickly, simply and uniformly effectively.

An associated principal object of the present invention is to provide an improved package.

Another object of the present invention is to provide an improved liquid-containing hermetically sealed plastic bottle.

The above and other objects of the present invention will become apparent from a reading of the following description taken in conjunction with the accompanying drawings, wherein Figure l is an exploded perspective view of the elements forming the improved package, the bottle being illustrated broken away and partly in section;

Figure 2 is a front view o-f an induction heating electrode and bottles passing through the field of the electrode, the bottles being illustrated partially broken away;

Figure 3 is a side elevational view thereof;

Figure 4 is an enlarged detailed sectional view of the capped bottle before sealing, taken along line 4-4 of` Figure 2; and

Figure 5 is an enlarged detailed sectional view of the sealed bottle taken along line 5--5 in Figure 2.

In a sense, the present invention contemplates the provision of an improved packaging method comprising introducing -a material to be packaged into a receptacle of a synthetic organic thermoplastic material provided with a neck portion having an Iopening surrounded by a peripheral border of upwardly directed convex transverse cross section, applying a sealing diaphragm over said -opening and in contact with said border, said diaphragm being formed of a second synthetic organic thermoplastic material compatible and fusible with said first thermoplastic material and having superimposed thereon and in heat transfer relationship therewith a metal sheet, applying pressure to said diaphragm in contact with said border to increase the area of contact therebetween, inductively heating said metal sheet to a temperature below the melting point thereof and above the melting points of said plastic materials to effect the fusion of said diaphragm and said neck into an integral unitary body.

Another feature of the present invention is the improved package comprising a relatively heavy walled receptacle formed of a synthetic organic thermoplastic material and having an opening surrounded by a peripheral border and a relatively thin diaphragm of a synthetic organic thermoplastic material having its peripheral border integrally fused to said border surrounding said opening.

Referring now to the drawings, which illustrate a receptacle yand closure arrangement, as well as an electrode system by which the present improved method may be practiced, reference numeral 10 generally designates a self-supporting bottle-type receptacle formed of a synthetic organic thermoplastic material, such as a relatively heavy gauge polyethylene, for example of about lA thickness. Although polyethylene is preferred, other suitable organic thermoplastic materials may be likewise employed, such as vinylidine chloride, vinyl chlorideacetate copolymer, etc.

Bottle 10 includes a neck portion 11 joined to the body of the bottle by a shoulder 12 and of a somewhat greater thickness than the body of the bottle. Neck 11 is provided with a heavy external thread defining a helical bead 13 on the outer face thereof, extending from substantially the top of neck 11 to a point short of the bottom thereof. Opening 14 of neck 11 is surrounded by an upwardly directed border 16 of arcuate convex transverse cross section (see Figure l), an important structural feature of my invention. While the border 16 is illustrated as being curved, it may be formed of one or more flat surfaces provided that they do not lie in a horizontal plane for any significant portion thereof. There should be no topmost area present which will permit the accumulation of any liquid. Furthermore, the convexity should be such `as to permit the compression of a portion thereof to a planar configuration upon the application of reasonable pressure, as will be developed hereinafter.

In order to effect the hermetic sealing of opening 14, l provide a multi-layer gasket 17 of circular configuration and of a diameter approximately equal to the outer diameter of neck 11. Gasket 17 includes a thin circular sheet or diaphragm 18 of a synthetic organic thermoplastic material which is compatible and fusible with the matrial forming bottle 10. Diaphragm 18 should be of a frangible nature and preferably formed of the same material as bottle 10, for example polyethylene, and may be formed of other materials such as vinyl chloride, vinylidene chloride and polyesters such as polyethylene perphthalate (Mylar). superimposed upon diaphragm 18 is a thin metallic, intermediate circular disc 19 preferably formed of aluminum or similar metal, and in heat transfer relationship with diaphragm 18. A cushioning member 20, also in the form of a circular disc, is superimposed upon metal disc 19 and is formed of a suitably resilient material such as paper or the like. Discs 18, 19 and 2t) may be permanently or temporarily secured to each other by any suitable adhesive. In its preferred form, the material forming the multi-layer gaskets is supplied as a sheet and the gaskets punchedl therefrom.

A screw cap 21 is provided, of a non-metallic material, such as a thermoset organic plastic material, and of conventional construction, including a top wall 22 and a depending peripheral collar 23 provided on its inner face with a thread 24 which mates with thread 13 on bottle neck 11. Gasket 17 nests in the screwl cap 21 and the layer 20 abuts the underface of the top` Wall 22 thereof.

In order to effect a hermetic seal between gasket 1'7 and the opening into bottle 16, there is provided a solenoid electrode 26 which, in the preferred form, includes three turns of a metal tubing, such as copper, each turn including a pair of lower transversely spaced longitudinal arms and upper longitudinally spaced transverse arms to provide a longitudinally extending channel shaped electrode having a downwardly directed trough so as to provide a zone of high intensity magnetic field.

The ends of the solenoid electrode 26 are provided with coupling members 27, and the electrode is connected to a source (not shown) of circulating, cooling water. The terminals of the electrode 26 are also connected to a source of high frequency inductive heating current in the usual manner. A frequency of 450 kilocycies per second and a power source having a capacity of about 21/2 kilowatts has been found to be highly satisfactory. An endless belt having a longitudinally extending horizontal run 28 is disposed below the electrode 26.

ln practicing the improved method of the present invention, a material to be packaged, such as a liquid, is introduced into bottle 10 and screw cap 21 carrying gasket 17 is applied to the neck of the bottle. The cap 21 is tightly screwed into position to effect a deformation or flattening of the upper end of the border 16, as illustrated in Figure 4 of the drawing. Thereafter, the capped bottle is placed on conveyor 28 and transported therealong so that the upper portion of the cap neck of the bottle passes through and along the electrode trough in the high frequency magnetic field of high intensity. As a result, metal disc 19 is heated by induction to a temperature sufficiently high to soften and melt the thermoplastic diaphragm 18 as well as the abutting section of the bottle 16. A fusion is effected between the peripheral border of diaphragm 18 and neck 16 of bottle 10, as illustrated in Figure of the drawings, to provide an integral mass. It should be noted that, upon the melting and fusion of diaphragm 18 and bottle 16, the area of contact increases and there is a slight release of the downward pressure of the screw cap 21. The dimensions of diaphragm 18 and metal disc 19, as well as the intensity of the magnetic field, the time of exposure thereto and the pressure on the screw cap, are highly important and are dependent upon the materials employed and the dimensions of the bottle.

The improved method has been successfully employed under the following conditions. There were employed thin walled blown polyethylene bottles having necks with a 1" diameter opening and upwardly directed borders substantially as illustrated in the drawing. The bottle wall thickness was approximately lAG inch and the neck wall thickness approximately Ms inch. The gasket 17 includes a diaphragm 18 of 4 mil. polyethylene, a disc 19 formed of 1 mil. aluminum, and a cushioning disc 2f? formed of 50 lb. kraft paper. The cap was screwed on the neck of the bottle with a torque of approximately 25 to 40 inch pounds. As a result, the top of the arcuate convex bottle '16 was compressed to a relatively flat annulus of 1/16 width. The bottle was then placed on conveyor 28 and transported along electrode 26, being exposed to the high frequency magnetic induction field for a period of one second. The high frequency magnetic field raised the temperature of aluminum disc 18, which effected the fusion of the peripheral border of diaphragm 18 to the bottle neck 11, forming a zone of integral material at the area of contact which increased by reason of the softening of the material and the pressure of the screw cap to a width of about '0){32 inch.

It is important to note that disc 19 should be raised to a temperature below its melting point but above the melting point of the diaphragm 18. Exposing the disc 19 to the induction field for too long a time would result in the melting of the disc 19 and for too short a time would not effect the proper fusion between the diaphragm 18 and the bottle neck 11. lt should be noted that if diaphragm 18 is too thin, it would rupture before an adequate sealing is effected, and if it is too thick there is not sufcient heat transfer to bottle 16 to effect proper fusion thereof with diaphragm 18. Furthermore, if the metal disc 19 is too thin, it would melt before proper fusion is effected and if it were too thick the resulting heat generated would be excessive.

After the bottle has passed under electrode 26, cap 21 is slightly loosened by reason of the release of pressure resulting from the fusion of diaphragm 18 to bottle neck 11.

In employing the method above set forth, caps 21 were tightened onto the bottle necks by conventional automatic means. The bottles sealed by the method hereof are hermetically tight, and no defects were noted although large numbers of bottles were continuously sealed in the manner above set forth. In order to lgain access to the contents of the sealed bottle, it is necessary to puncture or fracture the diaphragm 18. It cannot be readily separated from the bottle neck 11 since it forms an integral part therewith.

While there has been described and illustrated preferred embodiments of the present invention, it is apparent that numerous alterations and omissions may be made without departing from the spirit thereof.

I claim:

l. An improved packaging method comprising introducing a material to be packaged into a receptacle of synthetic organic thermoplastic material, provided with a neck portion having an opening surrounded by a peripheral border of upwardly directed, convex, transverse cross-section, applying a sealing diaphragm over said opening and in contact with said border, said diaphragm being formed of a second synthetic organic thermoplastic material compatible and fusible with said first thermoplastic material, and having superimposed thereon and in heat transfer relationship therewith a metal sheet, applying pressure to said diaphragm in contact with said border to distort the interface and to increase the area of contact therebetween, inductively heating the metal sheet to a temperature below the melting point thereof and above the melting points of said plastic materials thereby to effect fusion of said diaphragm and said neck into an integral unitary body.

2. An improved packaging method comprising introducing a material to be packaged into a receptacle of synthetic organic thermoplastic material, provided with a neck portion having an opening surrounded by a peripheral border of upwardly directed, curved, convex, transverse cross-section, applying a sealing diaphragm over said opening and in contact with said border, said diaphragm being formed of a second synthetic organic thermoplastic material compatible and fusible with said first thermoplastic material, and having superimposed thereon and in heat transfer relationship therewith a metal sheet, applying pressure to said diaphragm in contact with said border at least partially to flatten said convex border to increase the area of contact between said diaphragm and said border, thereafter, inductively heating the metal sheet to a temperature below the melting point thereof and above the melting points of said plastic materials thereby to effect fusion of said diaphragm. and said. neck into an integral unitary body..

3. An improved packaging method comprising introducing a material to be packaged into a bottle formed of a synthetic organic, thermoplastic material and provided with yan externally threaded neck portion surrounded by a peripheral border of upwardly directed, convex, transverse cross-section, applying a sealing diaphragm over said opening and in contact with said border, said diaphragm being formed of -a second synthetic organic thermoplastic material and having superimposed thereon and in Iheat transfer relationship therewith a metal sheet, Iapplying a screw cap to said threaded neck and tightening said screw cap to apply pressure to said idiaphragm in contact with said border at least partially to Hatten said convex border to increase the area of contact between said diaphragm and said border, thereafter, inductively heating said metal sheet to a temperature below the melting point thereof and above the melting points of said plastic materials to eiect the fusion of said diaphragm and said neck Ainto an integral unitary body.

4. An improved packing method in accordance with claim 3, wherein the neck of said bottle is continuously moved through `a high Ifrequency magnetic ield to effect the inductive heating thereof.

5. The improved method in Vaccordance with claim 2, wherein said receptacle and sealing diaphragm are formed of polyethylene.

References Cited in the file of this patent UNITED STATES PATENTS 2,236,491 `Campbell Mar. 25, 1941 2,372,885 Derby Apr. 3, 1945 2,431,114 Golding Nov. 18, 1947 2,553,259 Hagedorn May 15, 1951 2,588,604 Archer Mar. 1'1, 1952 2,620,939 Weisgerber Dec. 9, 1952 2,681,296 Dobbs et al .Tune 15, 1954 2,799,981 Baker-Carr et al. July 23, 1957 2,833,683 Quandt May 6, 1958

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Cited By (50)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106441A (en) * 1960-01-04 1963-10-08 Grace W R & Co Method of making preforms or blanks from polyethylene
US3119216A (en) * 1960-05-05 1964-01-28 Phillips Petroleum Co Heat sealing of thermoplastic containers
US3129867A (en) * 1961-01-30 1964-04-21 American Can Co Lined container
US3146564A (en) * 1961-06-08 1964-09-01 Bemis Bro Bag Co Apparatus for closing and sealing bag tops
US3243070A (en) * 1964-12-02 1966-03-29 Dow Chemical Co Cap for polystyrene container
US3323670A (en) * 1964-09-09 1967-06-06 Standard Cap & Seal Inc Bottle closure
DE1297520B (en) * 1964-12-09 1969-06-12 United Glass Ltd Method and device for tight sealing of containers made of non-metallic material with a metal foil
US3494093A (en) * 1967-06-23 1970-02-10 Owens Illinois Inc Container closure and method of filling containers
US3612326A (en) * 1969-03-20 1971-10-12 Tenneco Chem Extension seal for a plastic container
US3632004A (en) * 1969-09-17 1972-01-04 Shell Oil Co Fused container closure and means facilitating removal of the same
US3767076A (en) * 1971-08-12 1973-10-23 Owens Illinois Inc Plastic container
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
US3805993A (en) * 1970-04-14 1974-04-23 Gen Foods Corp Closure for metal container
US3815314A (en) * 1972-09-11 1974-06-11 Phoenix Closures Inc Packaging method
US3906070A (en) * 1970-09-28 1975-09-16 Colgate Palmolive Co Method of protectively covering metal threads
USB337023I5 (en) * 1973-03-01 1976-03-30
US3973719A (en) * 1974-07-12 1976-08-10 The Procter & Gamble Company Container having a membrane-type closure
US4015401A (en) * 1973-03-07 1977-04-05 American Hospital Supply Corporation Method of forming closure system for medical liquid container
US4095390A (en) * 1976-04-01 1978-06-20 Mckenna Equipment Company, Inc. Machine and process for capping and sealing containers
US4109815A (en) * 1976-12-08 1978-08-29 Aluminum Company Of America Induction heat sealed containers
US4180961A (en) * 1976-12-08 1980-01-01 Aluminum Company Of America Induction heat sealed containers
US4364485A (en) * 1981-05-15 1982-12-21 Schering Corporation Injectable fluid container and method
US4539456A (en) * 1983-02-10 1985-09-03 Continental Can Company, Inc. Induction heating system and method of bonding container end unit to body utilizing the same
US4576297A (en) * 1983-11-21 1986-03-18 Minnesota Mining And Manufacturing Company Tamper resistant closure
US4632265A (en) * 1983-06-24 1986-12-30 Cochrane Benjamin A Press-on cap and seal
US4638134A (en) * 1981-02-07 1987-01-20 Deutsche Gesellschaft Device for evacuating, filling and closing final storage containers for radioactive materials
US4722447A (en) * 1986-11-20 1988-02-02 Northern Engineering And Plastics Corp. Closure assembly with two tamper indicators
US4771903A (en) * 1986-11-14 1988-09-20 Leon Levene Glass container sealing method
US4778698A (en) * 1987-03-26 1988-10-18 Minnesota Mining And Manufacturing Company Innerseal for container for use with liquid contents
WO1989002402A1 (en) * 1987-09-09 1989-03-23 Stanpac Inc; Sealing member for a container
EP0356525A1 (en) * 1988-02-09 1990-03-07 Taiyo Fishery Co., Ltd. Method and apparatus for vacuum sealing a precooked-food container
US4934544A (en) * 1989-02-27 1990-06-19 Minnesota Mining And Manufacturing Company Z-tab innerseal for a container and method of application
US5004111A (en) * 1989-02-27 1991-04-02 Minnesota Mining & Manufacturing Company Internally delaminating tabbed innerseal for a container and method of applying
US5012946A (en) * 1989-02-27 1991-05-07 Minnesota Mining & Manufacturing Company Innerseal for a container and method of applying
USRE33764E (en) * 1983-06-24 1991-12-10 Press-on cap and seal
US5226281A (en) * 1989-02-27 1993-07-13 Minnesota Mining And Manufacturing Company Z-tab innerseal for a container and method of application
US5514442A (en) * 1987-09-09 1996-05-07 Stanpac, Inc. Sealing member for a container
WO1998036969A1 (en) * 1997-02-21 1998-08-27 Alfelder Kunststoffwerke Herm. Meyer Gmbh Method and device for induction sealing
US5915577A (en) * 1997-04-30 1999-06-29 Selig Sealing Products, Inc. Separating seal system for containers and method of making same
US6196450B1 (en) 1999-09-02 2001-03-06 Sonoco Development, Inc. Easy-open composite container with a membrane-type closure
EP1228976A2 (en) * 2001-01-31 2002-08-07 Adelholzener Alpenquellen GmbH Seal for sealing a container as well as method of controlling the seal status of a closed container
WO2003043889A1 (en) * 2001-11-15 2003-05-30 Sonoco Development, Inc. Method for induction sealing a plastic part to a composite container
US20050247712A1 (en) * 2002-07-26 2005-11-10 Wallis Andrew J Peelable lid structure
US6974045B1 (en) 1999-05-04 2005-12-13 Alfelder Kunststoffwerke Herm. Meyer Gmbh Sealing disc and film composite for a closure of a container
US20070157824A1 (en) * 2006-01-11 2007-07-12 Aac Trade Ltd. Cooking device particularly useful for cooking pasta, and hot receptacle holder especially useful therewith
US20080197099A1 (en) * 2007-02-20 2008-08-21 Adam Pawlick Non-removable closure
US20090008392A1 (en) * 2007-07-05 2009-01-08 De Cleir Piaras Valdis Food Containers Adapted For Accommodating Pressure Changes and Methods of Manufacture
US20120048825A1 (en) * 2010-08-31 2012-03-01 Kristi Bina Averett Long-term packaging of food for consumer use
US20120193267A1 (en) * 2009-09-23 2012-08-02 Boehringer Ingelheim International Gmbh Induction seal disk
WO2014130170A1 (en) * 2013-02-22 2014-08-28 Heyn William M Induction heat sealed container closures

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US2431114A (en) * 1942-12-09 1947-11-18 Golding James Leonard Device and method for applying thermoplastic caps to containers
US2553259A (en) * 1946-09-02 1951-05-15 Nordisk Insulinlab Process of joining plastic substances
US2620939A (en) * 1948-09-09 1952-12-09 Johnson & Johnson Sealing closure for containers
US2588604A (en) * 1949-10-15 1952-03-11 Injection Molding Company Method of sealing hollow bodies, such as bottles and similar containers of plastic material
US2681296A (en) * 1951-08-13 1954-06-15 Frank G Dobbs Manufacture of sealed enclosures
US2799981A (en) * 1953-10-09 1957-07-23 Glaxo Lab Ltd Sealing of bottles, vials and the like
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Cited By (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3106441A (en) * 1960-01-04 1963-10-08 Grace W R & Co Method of making preforms or blanks from polyethylene
US3119216A (en) * 1960-05-05 1964-01-28 Phillips Petroleum Co Heat sealing of thermoplastic containers
US3129867A (en) * 1961-01-30 1964-04-21 American Can Co Lined container
US3146564A (en) * 1961-06-08 1964-09-01 Bemis Bro Bag Co Apparatus for closing and sealing bag tops
US3323670A (en) * 1964-09-09 1967-06-06 Standard Cap & Seal Inc Bottle closure
US3243070A (en) * 1964-12-02 1966-03-29 Dow Chemical Co Cap for polystyrene container
US3460310A (en) * 1964-12-09 1969-08-12 United Glass Ltd Container closures
DE1297520B (en) * 1964-12-09 1969-06-12 United Glass Ltd Method and device for tight sealing of containers made of non-metallic material with a metal foil
US3494093A (en) * 1967-06-23 1970-02-10 Owens Illinois Inc Container closure and method of filling containers
US3612326A (en) * 1969-03-20 1971-10-12 Tenneco Chem Extension seal for a plastic container
US3632004A (en) * 1969-09-17 1972-01-04 Shell Oil Co Fused container closure and means facilitating removal of the same
US3805993A (en) * 1970-04-14 1974-04-23 Gen Foods Corp Closure for metal container
US3906070A (en) * 1970-09-28 1975-09-16 Colgate Palmolive Co Method of protectively covering metal threads
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
US3767076A (en) * 1971-08-12 1973-10-23 Owens Illinois Inc Plastic container
US3815314A (en) * 1972-09-11 1974-06-11 Phoenix Closures Inc Packaging method
USB337023I5 (en) * 1973-03-01 1976-03-30
US4013188A (en) * 1973-03-01 1977-03-22 General Foods Corporation Induction sealed closure
US4015401A (en) * 1973-03-07 1977-04-05 American Hospital Supply Corporation Method of forming closure system for medical liquid container
US3973719A (en) * 1974-07-12 1976-08-10 The Procter & Gamble Company Container having a membrane-type closure
US4095390A (en) * 1976-04-01 1978-06-20 Mckenna Equipment Company, Inc. Machine and process for capping and sealing containers
US4109815A (en) * 1976-12-08 1978-08-29 Aluminum Company Of America Induction heat sealed containers
US4180961A (en) * 1976-12-08 1980-01-01 Aluminum Company Of America Induction heat sealed containers
US4638134A (en) * 1981-02-07 1987-01-20 Deutsche Gesellschaft Device for evacuating, filling and closing final storage containers for radioactive materials
US4364485A (en) * 1981-05-15 1982-12-21 Schering Corporation Injectable fluid container and method
US4539456A (en) * 1983-02-10 1985-09-03 Continental Can Company, Inc. Induction heating system and method of bonding container end unit to body utilizing the same
US4632265A (en) * 1983-06-24 1986-12-30 Cochrane Benjamin A Press-on cap and seal
USRE33764E (en) * 1983-06-24 1991-12-10 Press-on cap and seal
US4576297A (en) * 1983-11-21 1986-03-18 Minnesota Mining And Manufacturing Company Tamper resistant closure
US4771903A (en) * 1986-11-14 1988-09-20 Leon Levene Glass container sealing method
US4722447A (en) * 1986-11-20 1988-02-02 Northern Engineering And Plastics Corp. Closure assembly with two tamper indicators
US4778698A (en) * 1987-03-26 1988-10-18 Minnesota Mining And Manufacturing Company Innerseal for container for use with liquid contents
US5514442A (en) * 1987-09-09 1996-05-07 Stanpac, Inc. Sealing member for a container
US5433992A (en) * 1987-09-09 1995-07-18 Stanpac Inc. Sealing member for a container
WO1989002402A1 (en) * 1987-09-09 1989-03-23 Stanpac Inc; Sealing member for a container
US4961986A (en) * 1987-09-09 1990-10-09 Stanpac Inc. Sealing member for a container
EP0356525A4 (en) * 1988-02-09 1990-09-26 Taiyo Fishery Co., Ltd. Method and apparatus for vacuum sealing a precooked-food container
EP0356525A1 (en) * 1988-02-09 1990-03-07 Taiyo Fishery Co., Ltd. Method and apparatus for vacuum sealing a precooked-food container
US5004111A (en) * 1989-02-27 1991-04-02 Minnesota Mining & Manufacturing Company Internally delaminating tabbed innerseal for a container and method of applying
US5012946A (en) * 1989-02-27 1991-05-07 Minnesota Mining & Manufacturing Company Innerseal for a container and method of applying
US5226281A (en) * 1989-02-27 1993-07-13 Minnesota Mining And Manufacturing Company Z-tab innerseal for a container and method of application
US4934544A (en) * 1989-02-27 1990-06-19 Minnesota Mining And Manufacturing Company Z-tab innerseal for a container and method of application
WO1998036969A1 (en) * 1997-02-21 1998-08-27 Alfelder Kunststoffwerke Herm. Meyer Gmbh Method and device for induction sealing
US6362461B1 (en) 1997-02-21 2002-03-26 Alfelder Kunststoffwerke Herm. Meyer Gmbh Method and device for induction sealing
US5915577A (en) * 1997-04-30 1999-06-29 Selig Sealing Products, Inc. Separating seal system for containers and method of making same
US6974045B1 (en) 1999-05-04 2005-12-13 Alfelder Kunststoffwerke Herm. Meyer Gmbh Sealing disc and film composite for a closure of a container
US6196450B1 (en) 1999-09-02 2001-03-06 Sonoco Development, Inc. Easy-open composite container with a membrane-type closure
EP1228976A2 (en) * 2001-01-31 2002-08-07 Adelholzener Alpenquellen GmbH Seal for sealing a container as well as method of controlling the seal status of a closed container
EP1228976A3 (en) * 2001-01-31 2004-11-17 Adelholzener Alpenquellen GmbH Seal for sealing a container as well as method of controlling the seal status of a closed container
WO2003043889A1 (en) * 2001-11-15 2003-05-30 Sonoco Development, Inc. Method for induction sealing a plastic part to a composite container
US6725630B2 (en) * 2001-11-15 2004-04-27 Sonoco Development, Inc. Method for induction sealing a plastic part to a composite container
US20050247712A1 (en) * 2002-07-26 2005-11-10 Wallis Andrew J Peelable lid structure
US7766183B2 (en) * 2002-07-26 2010-08-03 Crown Packaging Technology, Inc. Peelable lid structure
US20070157824A1 (en) * 2006-01-11 2007-07-12 Aac Trade Ltd. Cooking device particularly useful for cooking pasta, and hot receptacle holder especially useful therewith
US8113367B2 (en) * 2007-02-20 2012-02-14 Con Agra Foods RDM, Inc. Non-removable closure having a dispensing aperture extending therethrough
US20080197099A1 (en) * 2007-02-20 2008-08-21 Adam Pawlick Non-removable closure
US20090008392A1 (en) * 2007-07-05 2009-01-08 De Cleir Piaras Valdis Food Containers Adapted For Accommodating Pressure Changes and Methods of Manufacture
US8584876B2 (en) * 2007-07-05 2013-11-19 Kraft Foods Group Brands Llc Food containers adapted for accommodating pressure changes using skip seals and methods of manufacture
US20120193267A1 (en) * 2009-09-23 2012-08-02 Boehringer Ingelheim International Gmbh Induction seal disk
JP2013505176A (en) * 2009-09-23 2013-02-14 ベーリンガー インゲルハイム インターナショナル ゲゼルシャフト ミット ベシュレンクテル ハフツング Induction seal disk
US9302796B2 (en) * 2010-08-31 2016-04-05 Foodwise Trn, Llc Long-term packaging of food for consumer use
US20120048825A1 (en) * 2010-08-31 2012-03-01 Kristi Bina Averett Long-term packaging of food for consumer use
WO2014130170A1 (en) * 2013-02-22 2014-08-28 Heyn William M Induction heat sealed container closures

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