US3651615A - Method of packaging between laminated webs with heat and ultrasonic seals - Google Patents

Method of packaging between laminated webs with heat and ultrasonic seals Download PDF

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US3651615A
US3651615A US3651615DA US3651615A US 3651615 A US3651615 A US 3651615A US 3651615D A US3651615D A US 3651615DA US 3651615 A US3651615 A US 3651615A
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package
heat
seal
sealed
method
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Thomas H Bohner
Vincent L Vaillancourt
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C L Band Inc
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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
    • 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
    • B29C65/08Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • 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
    • B29C65/76Making non-permanent or releasable 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
    • 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
    • B29C65/7888Means for handling of moving sheets or webs
    • B29C65/7891Means for handling of moving sheets or webs of discontinuously moving sheets or webs
    • 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
    • B29C66/1122Single lap to lap joints, i.e. overlap 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
    • B29C66/345Progressively making the joint, e.g. starting from the middle
    • B29C66/3452Making complete joints by combining partial 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
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/431Joining the articles to themselves
    • B29C66/4312Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • 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
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/431Joining the articles to themselves
    • B29C66/4312Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • B29C66/43121Closing the ends of tubular or hollow single articles, e.g. closing the ends of bags
    • 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
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/432Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • 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
    • B29C66/70General 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
    • 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
    • B29C66/73General 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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739General 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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392General 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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921General 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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B65B51/225Applying 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 ultrasonic welding
    • 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
    • B29C66/832Reciprocating joining or pressing tools
    • B29C66/8322Joining or pressing tools reciprocating along one axis
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS
    • B29K2023/00Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04Polymers of ethylene
    • B29K2023/06PE, i.e. polyethylene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00Layered products
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00Layered products
    • B29L2009/003Layered products comprising a metal layer
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/712Containers; Packaging elements or accessories, Packages
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/712Containers; Packaging elements or accessories, Packages
    • B29L2031/7128Bags, sacks, sachets
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S220/00Receptacles
    • Y10S220/31Sonic seal

Abstract

A sealed package of metal-foil-polyethylene laminates, at least one edge of which is sealed by ultrasonic means, to form a rupturable seal through which the contents of the package can be released by moderate pressure on the package walls; and the method of making and filling such a package singly or in groups and with or without integrally attached package portions for receiving articles to which the contents of the rupturable package may eventually be supplied.

Description

United States atet Bohner et a1.

[54] METHOD OF PACKAGING BETWEEN LAMINATED WEBS WKTH HEAT AND ULTRASONIC SEALS UNITED STATES PATENTS 3,355,854 12/1967 Lowry ..53/28 51 Mar. 28, 1972 3,345,988 10/1967 Vitello ..206/56 A X 3,306,292 2/1967 Specs ....206/63.2 X 3,224,915 12/1965 Balamuth et al. ..l56/73 3,156,352 11/1964 Hayhurst ....206/47 A 3,146,141 8/1964 Woodland ..156/73 3,036,894 5/1962 Forestiere ....206/47 A UX 3,022,814 2/1962 Bodine ..l56/73 UX 2,898,744 8/1959 Robbins ..206/47 A X Primary Examiner-Leonard Summer AttorneyW. Saxton Seward [5 7] ABSTRACT A sealed package of metal-foil-polyethylene laminates, at least one edge of which is sealed by ultrasonic means, to form a rupturable seal through which the contents of the package can be released by moderate pressure on the package walls; and the method of making and filling such a package singly or in groups and with or without integrally attached package portions for receiving articles to which the contents of the rupturable package may eventually be supplied.

3 Claims, 5 Drawing Figures 25 Ultro- Lomlnole 23 Sonic 27 29 H Seal eat Seal F l gg CD1) LU] (Cut) Patented March 28, 1972 F l G l 2 Sheets-Sheet l H 20 Ultra- Sonic Seal Cut [I] INVENTORS:

THQMAS H. BOHNER VINCENT L. VAILLANCOURT 8) WWW ATTORNEYS METHOD OF PACKAGING BETWEEN LAMINATED WEBS WITH HEAT AND ULTRASONIC SEALS It is common, in the medical and surgical field and elsewhere, to package liquid, semiliquid or solid materials in packages formed by sealing together the edges (other than folded edges) of flat sheets of polyethylene or other heatsealable material, either alone or laminated with other materials including metal foil. The seals thus formed are generally quite durable so that such packages can be opened most accurately by cutting or tearing an end or comer, in a well-known manner.

It is an object of the present invention to provide a package in which one edge, for instance, is closed by ultrasonic sealing, which provides security but which can be opened, to squeeze out liquid or pasty contents, with only moderate pressure and with the assurance that only the specially sealed edge will give way.

The method of making such packages, as described herein, has particular importance in assuring sterility of the contents and facilitating the sterile packing of other articles when a two-compartment package is involved.

Practical embodiments of the invention will be described with reference to the accompanying drawings, in which:

FIG. 1 represents an elevation of a simple package embodying this invention;

FIG. 2 is a flow diagram showing the steps followed in making the package ofFIG. 1;

FIG. 3 represents an elevation showing somewhat diagrammatically a group of packages in filling position, with indications of the nature of other steps to be taken to complete the process;

FIG. 4 is a flow diagram showing the steps followed in making the packages ofFIG. 3; and

FIG. 5 represents an elevation of a single completed package according to FIGS. 3 and 4.

Referring to the drawings, the package of FIG. 1 comprises front and back walls, each composed of a metal-foilpolyethylene laminate, the polyethylene faces being heat sealed together along both sides 10, 11 and across the bottom 12. Within the pouch or pocket thus formed there is inserted, in a customary manner, a quantity of lubricant 13 or other material up to a desired level 14, and the top of the package is sealed ultrasonically throughout the zone 15. The strength of the latter seal can be predetermined very accurately, ensuring that it is less than the heat seals along edges 10, 11 and 12. Additionally, a weakened point may be formed, as indicated at 16, to ensure breaking of the seal initially at that point when the package is squeezed to release the contents.

Packages of the type just described may conveniently be made by taking the steps indicated in FIG. 2, webs of foilpolyethylene laminate being brought into facing contact at 17, heat sealed at 18 in a pattern designed to produce units having sealed areas 10, 11 and 12 as shown in FIG. 1, filled at 19 with liquid, pasty or dry material, as desired, and then ultrasonically sealed across their top edges in a suitable apparatus 20, the horn of which is shaped and proportioned, preferably, to seal a plurality of adjacent packages in each cycle of operation, each sealed area being as indicated at in FIG. 1.

The welding device 20 is provided with a horn about one quarter inch wide and long enough to span, for instance, four package widths. It acts on the superimposed laminated webs through a Teflon" coated glass fiber buffer pad (not shown), with a pressure of 40 p.s.i. to 50 p.s.i. for a time of about 3 sec. The seal thus made will not rupture through normal sterilization cycles but ruptures readily, when desired, under a finger pressure of about 10 pounds. Since a normal adult female can exert a thumb pressure of 20-25 pounds without undue exertion, and a male adult can exert 40-45 pounds, it will be understood that a 10 pound squeeze is well within the competence of any prospective user (e.g., nurse or other hospital attendant).

Assuming that the packages have been filled and sealed in groups or in a strip, as would be most efficient, the final step of cutting apart the individual packages is effected at 21. If a sterilization step is required, it can be perfonned in any suitable manner without affecting the package seals.

In FIG. 3 is represented a group of four two-compartment packages, each designed to have a lubricant or other material enclosed in one compartment, a catheter or other medical or surgical device in the other compartment and a rupturable ultrasonic seal between the compartments.

The initial step in the making of such packages, according to the steps outlined in FIG. 4 involves the provision of a polyethylene (PE) web having a width corresponding to the total length of each package to be formed, and a foil web having a width corresponding to the length of the liquid material compartment, including end and rupturable seal zones. These webs may be laminated together in a known manner, and the laminations are brought together, with the polyethylene sides in contact, at the point 22. Foil-PE laminates are not broadly new, but a PE web with foil laminated only along one edge has a peculiar new utility in the present context.

The facing laminations are then heat sealed together at 23, along parallel transverse zones 23' (FIG. 3), to form a succession of open sleeves, which are cut apart, conveniently, in groups of four (24a, 24b, 24c, 24d) each group being subjected to welding action by the horn of an ultrasonic device 25, the shape of the welded area being shown at 25' in FIG. 3 as a narrow strip extending along one edge of the foil lamination, with wide V-shaped indentations 26 at the middle of each sleeve. The nozzles 27 of a filling machine 27 are inserted in the open ends of each compartment formed in the upper end of each sleeve by'the seals 23' and 25, material such as a lubricant is supplied through the nozzles from a source (not shown) to fill each compartment up to a line 28 (e.g., 65 percent to percent of capacity), and the nozzles are removed. The compartments are then heat sealed along the upper margin 29' in the sealing and cutting unit 29, and the packages are separated by cutting on the lines 30, along the center of each zone 23'.

Packages made as just described are suitable for use for packing such medical and surgical items as catheters, drainage tubes and the like which are placed in the enclosed spaces 31a, 31b, 31c and 31d through the open ends shown at the bottom of FIG. 3, said ends being then heat sealed (corresponding to seals 23) and the complete packages sterilized, as by gas, in a well-known manner. In this case the material supplied to the smaller sealed compartments may desirably be a lubricant which, at the time of use, is released by squeezing the compartment to break the seal 25 (starting at the indentation 26) so that the catheter or the like has its tip and at least adjacent portions covered with lubricant while maintained in completely sterile condition.

It is known that heat sealing techniques require that a threshold time-temperature relationship must be established before sealing takes place and it is difficult, if not impossible, to control accurately the seal strength in the face of such critical parameters. By using an ultrasonic seal, the strength of which is a function of easily controlled time and pressure factors, very precise variations in seal strength can be achieved.

What is claimed is:

1. The method of making a sealed package which includes providing two package elements each being a polyethylene web of extended length and limited width and each having a narrower strip of metal foil laminated adjacent a corresponding edge, bringing the polyethylene surfaces of said elements into facing contact, applying heat to selected areas of said contacting surfaces to heat seal said elements together in said areas, applying ultrasonic sealing means to laminated areas of said contacting surfaces to join said elements together in said laminated areas, the ultrasonic and heat seals cooperating to define a partially enclosed pocket, placing a material to be packaged in said pocket, additionally sealing the elements to complete the closure of the pocket, and severing the filled package from the webs.

2. The method according to claim 1 in which the additional seal is a heat seal.

3. The method according to claim 2 in which the first heat seals extend transversely across the width of the polyethylene webs, the ultrasonic seal extends longitudinally adjacent an edge of the laminated portions spaced from the first mentioned edge, and the additional heat seal extends longitu- 5 dinally adjacent said first mentioned edge.

Claims (2)

  1. 2. The method according to claim 1 in which the additional seal is a heat seal.
  2. 3. The method according to claim 2 in which the first heat seals extend transversely across the width of the polyethylene webs, the ultrasonic seal extends longitudinally adjacent an edge of the laminated portions spaced from the first mentioned edge, and the additional heat seal extends longitudinally adjacent said first mentioned edge.
US3651615A 1969-06-25 1969-06-25 Method of packaging between laminated webs with heat and ultrasonic seals Expired - Lifetime US3651615A (en)

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Cited By (62)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3762540A (en) * 1970-05-19 1973-10-02 Dentaire Ivoclar Ets Receptacle having at least three chambers
US3847279A (en) * 1969-11-20 1974-11-12 American Cyanamid Co Package for plural reactable components with rupturable ultrasonic seal
US3892620A (en) * 1974-01-07 1975-07-01 Evans Prod Co Apparatus for forming envelopes of thermoplastic sheet material
US3913789A (en) * 1974-02-13 1975-10-21 United States Banknote Corp Fluid container of the flexible wall capsule type
US3948387A (en) * 1973-06-25 1976-04-06 Kleen Test Products, Inc. Fabric package for a vaporizable anti-static and fabric softening bar
US3952868A (en) * 1973-06-20 1976-04-27 Focke & Pfuhl Cigarette packet of laminated sheeting and method for the production thereof
US3975885A (en) * 1972-03-02 1976-08-24 Carlisle Richard S Methods for producing filled containers
FR2456606A1 (en) * 1979-05-18 1980-12-12 Gen Electric Method and apparatus for making a tubular container, containing a smaller, from a material sheet
US4363205A (en) * 1976-11-08 1982-12-14 John P. Glass Packaging method
US4364474A (en) * 1976-09-02 1982-12-21 John P. Glass Packages
EP0078761A2 (en) * 1981-10-29 1983-05-11 Crown Zellerbach Corporation Container having a pressure-rupturable seal for dispensing contents
US4555354A (en) * 1978-11-17 1985-11-26 Lever Brothers Company Detergents products
US4642973A (en) * 1984-04-02 1987-02-17 Multiform Desiccants, Inc. Apparatus for fabricating dual compartment powder cartridge
US4709534A (en) * 1982-05-15 1987-12-01 Sengewald Karl H Bag for infusion solutions and the like and method of manufacturing the same
US5096052A (en) * 1991-01-25 1992-03-17 Raque Food Systems, Inc. Ultrasonic sealing method and assembly
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