+

WO1996035614A1 - Closure for paperboard container - Google Patents

Closure for paperboard container Download PDF

Info

Publication number
WO1996035614A1
WO1996035614A1 PCT/US1995/005718 US9505718W WO9635614A1 WO 1996035614 A1 WO1996035614 A1 WO 1996035614A1 US 9505718 W US9505718 W US 9505718W WO 9635614 A1 WO9635614 A1 WO 9635614A1
Authority
WO
WIPO (PCT)
Prior art keywords
frame
paperboard
leading edge
channel
insert
Prior art date
Application number
PCT/US1995/005718
Other languages
French (fr)
Inventor
Robert W. Fox
Original Assignee
Combibloc, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Combibloc, Inc. filed Critical Combibloc, Inc.
Priority to PCT/US1995/005718 priority Critical patent/WO1996035614A1/en
Publication of WO1996035614A1 publication Critical patent/WO1996035614A1/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D17/00—Rigid or semi-rigid containers specially constructed to be opened by cutting or piercing, or by tearing of frangible members or portions
    • B65D17/50—Non-integral frangible members applied to, or inserted in, preformed openings, e.g. tearable strips or plastic plugs
    • B65D17/506—Rigid or semi-rigid members, e.g. plugs
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1425—Microwave radiation
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining 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"
    • B29C65/36—Joining 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
    • B29C65/3604—Joining 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
    • B29C65/3644—Joining 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
    • 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
    • B29C65/78—Means 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
    • B29C65/7858—Means 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
    • B29C65/7861—In-line machines, i.e. feeding, joining and discharging are in one production line
    • B29C65/787—In-line machines, i.e. feeding, joining and discharging are in one production line using conveyor belts or conveyor chains
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular 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
    • B29C66/2424—Particular 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 a closed polygonal chain
    • B29C66/24243—Particular 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 a closed polygonal chain forming a quadrilateral
    • B29C66/24244—Particular 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 a closed polygonal chain forming a quadrilateral forming a rectangle
    • 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
    • B29C66/545—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 one hollow-preform being placed inside the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons
    • B65B7/28—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons by applying separate preformed closures, e.g. lids, covers
    • B65B7/2842—Securing closures on containers
    • B65B7/2878—Securing closures on containers by heat-sealing
    • 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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining 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"
    • B29C65/36—Joining 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
    • B29C65/3672—Joining 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
    • B29C65/3676—Joining 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
    • B29C65/368—Joining 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
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining 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"
    • B29C65/36—Joining 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
    • B29C65/3672—Joining 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
    • B29C65/3684—Joining 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 non-metallic
    • B29C65/3696—Joining 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 non-metallic with a coating
    • 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
    • B29C66/541—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 a substantially flat extra element being placed between and clamped by the joined hollow-preforms
    • B29C66/5412—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 a substantially flat extra element being placed between and clamped by the joined hollow-preforms said substantially flat extra element being flexible, e.g. a membrane
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/001—Action for opening container
    • B65D2517/0013—Action for opening container pull-out tear panel, e.g. by means of a tear-tab
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0031—Reclosable openings
    • B65D2517/0037—Reclosable openings the tape being resealable
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/0059—General cross-sectional shape of container end panel
    • B65D2517/0061—U-shaped
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/0001—Details
    • B65D2517/0058—Other details of container end panel
    • B65D2517/008—Materials of container end panel
    • B65D2517/0083—Rigid plastic
    • 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
    • B65D2517/00—Containers specially constructed to be opened by cutting, piercing or tearing of wall portions, e.g. preserving cans or tins
    • B65D2517/50—Non-integral frangible members applied to, or inserted in, a preformed opening
    • B65D2517/504—Details of preformed openings
    • B65D2517/5056—Details of preformed openings the edge of the preformed opening having a covering element or coating, e.g. to prevent cutting or for sealing purposes

Definitions

  • the present invention is designed to accomplish the aforementioned objectives.
  • the present invention includes a lid and opening feature for a paperboard container.
  • the present invention is designed to enable the container to be microwaved.
  • the present invention comprises
  • FIG. 1 shows an insert 20 in an
  • Figure 4 shows a plan view of the frame 26 apart from the container 10.
  • the frame 26 may take on any shape desirable to fit a particular shape of a container opening 14.
  • the rectangular shape shown in Figure 4 is provided for example purposes and should not be considered as limiting the scope of the present invention.
  • the adhesive polymer sealant material 22 may be placed within the channel 32 of the frame prior to assembly.
  • the sealant 22 may be

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Manufacturing & Machinery (AREA)
  • Packages (AREA)

Abstract

A closure for a microwavable paperboard food container (10) and a method of making it wherein the closure comprises a channel within a cover or frame. The cover or frame (16) is adhesively bonded to the leading edge of the container using an induction welding process.

Description

CLOSURE FOR PAPERBOARD CONTAINER
BACKGROUND AND SUMMARY OF THE INVENTION:
The present invention is generally related to containers for various products such as foods,
chemicals, drugs, powders, liquids and particulates, and more particularly, to a container including
a closure apparatus for sealing the container, using an induction heatable sealant.
Paperboard containers are known in the art. The present invention is concerned with
unique closure of containers and means by which opening of the container may be accomplished.
The present invention is concerned with providing a high quality cover or lid for paperboard
containers, which will enable ease of pouring of the contents from the container and/or ease of access to the contents, without sacrificing containment of the contents during periods of non-use. The present invention is not concerned with aerosol packages.
With popularity of microwave ovens, it is beneficial to have a container, designed to
accommodate foods, for example, which can be microwaved to heat the food contents without
removing the food from the container. One of the factors preventing the microwaving of some containers is that they include aluminum foil among the composite layers of paperboard which form the walls of such containers. Since metals cannot be microwaved, paperboard containers
having aluminum foil content are not suitable for microwaving. Recent innovation has allowed
for the removal of aluminum foil from paperboard containers. Another feature of the present
invention is that it will not exhibit undesirable reaction in response to microwave radiation.
In the case of foods in a paperboard container, it is desirable for the hd of the container
to accommodate pouring and/or access to the food from the container. The hd or opening should
be designed to maintain the hermetic nature of the container for aseptic packaging applications.
One of the important elements of any opening for a shelf-stable food package is the manner in which the feature connects to and seals onto the body or wall of the container. The seals preferably ήjMπt the outside air from entering the package.
The present invention is designed to accomplish the aforementioned objectives. The present invention includes a lid and opening feature for a paperboard container. The present invention is designed to enable the container to be microwaved. The present invention comprises
a plastic frame having a channel therein, the channel being adapted to receive the leading edge of
a paperboard container. The channel is preferably filled with a sealant material. The leading edge of the paperboard container resides in the channel amidst the sealant material and may be induction welded in place to form a bond between the frame, sealant material, and leading edge of the paperboard container, adequate for the formation ofa seal of hermetic quality. The frame
may comprise a number of different embodiments to accomplish pouring of the contents from the container. In one embodiment the interior of the frame may be a plastic thermoformed insert having a pop-up lid. In another embodiment the frame may have a removable flexible or semi¬ rigid seal secured to the frame to cover the opening defined by the frame. In yet another embodiment, the frame may have a paperboard insert covering the opening defined by the frame. Combinations of these materials may also be used in association with the frame to cover the opening defined by the frame.
The invention will be described in greater detail in the following drawings and detailed description ofa preferred embodiment.
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a perspective view ofa paperboard container of the present invention;
Figure 2A-E shows a dkgrammatical view of the steps ofa preferred manner of assembly of the closure of the present invention having a thermoformed insert lid; Figure 3A-E shows a ά^grammatical view of the steps ofa preferred manner of assembly
of the closure of the present invention having a paperboard plastic or combination thereof insert
hd;
Figure 4 is a plan view of the frame of the present invention;
Figure 5 shows a dkgrarmnatical overview of a preferred preparation of packages
incorporating the present invention;
Figure 6 is a sectional view of another embodiment ofa package closure apparatus of the present invention;
Figure 7 is a sectional view of another embodiment ofa package closure apparatus of the
present invention; and
Figure 8 shows a package filling assembly for use with the present invention.
DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS
Referring now to the drawings, and particularly Figure 1, there is shown a paperboard
container 10 including the present invention. The container 10 is comprised of a paperboard kminate structure which forms the walls 12 of the container. The opening 14 for the container
is defined by a cover 16. Any one of several different materials (as described in greater detail
below) may be used to seal the open area defined by the cover 16.
Referring now to Figure 2A, a cross-sectional view of the cover 16 is shown. The cover
16 may be of a unitary construction, such as a thermoformed or injection molded plastic. A
channel 18 is formed in the cover 16 at its outer edge. Figure 2B shows an insert 20 in an
opening 14 of the cover 16. The insert 20 would be in the closed position (not shown) while the
product is on store shelves. For pouring contents of the container, the insert 20 may be opened
as shown in Figure 2B. The insert 20 may be comprised of a plastic material, a paperboard irjaterial, a flexible material, other suitable materials, and combinations thereof Furthermore, the insert material may be entirely removed, as in the case with plastic or foil based peel-off
membranes (prior to use in a microwave), or it may have a hinged opening feature such as shown
in Figure 2B.
Figure 2C shows the introduction ofa sealant material 22 or coupling agent inside the channel 18 formed in the cover 16. The sealant material may be an adhesive polymer containing carbon or a metal such as iron, steel or other. To enable the container to be microwaved, the metal content in the adhesive polymer is preferably held to a minimum content to allow for
induction heating but not so great as to interfere with the microwave process.
Figure 2D shows the leading edge 24 of the paperboard container 10 about to come into contact with the adhesive polymer 22 within the channel 18. Figure 2E shows the leading edge 24 of the paperboard in contact with the adhesive polymer 22. At this point the induction heating process (also known as induction weldiαg to those of ordinary skill in the art) is used to melt the excitable material characteristics of the adhesive polymer which acts to bond the paperboard leading edge 24 within the channel 18 to form a hermetic seal. In addition to preferably preventing outside bacterial contaminants from entering the container around the sealed edge, the seal must also prevent leakage of the contents from the package. Between the steps shown in Figure 2D and 2E the content is placed into the container and as shown in Figure 2E, the insert is closed.
Figures 3A-E reveal much the same steps as shown in Figures 2A-E, except Figure 2A-E is for an insert made of paperboard. A frame 26 is shown in Figure 3A. A separate member 28
is secured to the frame 26 as shown in Figure 3B. The frame is preferably made from plastic material, while the member 28 may be of plastic, paperboard, or other suitable materials, or combinations thereof The renaming steps shown in Figures 3C-E are generally the same as described with respect to Figures 2C-E. In a preferred embodiment of the present invention, the cover 16 and frame 26 as shown in Figures 2A and 3A respectively, include a guiding edge 30 for assisting the leading edge 24 of the paperboard into proper position within the channel 18, 32.
Figure 4 shows a plan view of the frame 26 apart from the container 10. The frame 26 may take on any shape desirable to fit a particular shape of a container opening 14. The rectangular shape shown in Figure 4 is provided for example purposes and should not be considered as limiting the scope of the present invention. The adhesive polymer sealant material 22 may be placed within the channel 32 of the frame prior to assembly. The sealant 22 may be
comprised ofa carbon or metallic material and a polymer, such as polypropylene.
Figure 5 reveals a preferred embodiment of the steps for the preparation ofa package hd incorporating the features of the present invention. Step 1 shows the initial loading step of arranging a plurality of preformed Ms or inserts onto machinery, such as an injection molding machine. In Step 2 the inserts are injection molded into the frames comprising the Ms. The frames may actually be created at this stage of the process, in the injection molding machine. In Step 3 the frames are filled with the sealant material. The material is preferably placed in a channel formed in the frame. In Step 4 the Ms may be off-loaded for application to a package filling process to be prepared for assembly onto a package.
The present invention may be further configured to advance the purpose of packaging as shown in Figures 6 and 7. A polyethylene membrane 34 may be secured to the undersurface 36 of the frame and insert prior to placement onto the package. Other portions of the frame and insert may also have a membrane layer thereon, which is left to the manufacturer's discretion according to his particular application for the present invention. For example, in Figure 7 the entire Kd structure is encapsulated by a membrane layer. Once in position on the package opening
the membrane may be heat sealed creating a bond between the package and the frame in much the same way as the sealant material creates a bond as described above. In this embodiment, the polyethylene membrane will form a bond inside the channel causing the paperboard and frame to
be secured together in the channel. For access to the package contents, the membrane would be
punctured when a portion of the insert is opened. Specific areas of the membrane, around critical joints, would adhere to the insert. Figure 8 shows a preferred package filling arrangement in which the packages of the present invention may be filled with product, closed, sealed, and prepared for shipment.
The present invention is not intended to be construed as limited to the particular embodiments described above. It will be apparent to those skilled in the art that numerous modifications, variations, substitutions, and equivalents for features of the invention described herein, do not materially depart from the scope of this invention. The embodiments disclosed are to be regarded as illustrative rather than restrictive. Accordingly, it is expressly intended that all such modifications, variations, substitutions, and equivalents which fall within the spirit and scope of the invention as defined by the claims be embraced thereby.

Claims

WHAT IS CLAIMED IS:
1. An apparatus comprising:
A paperboard structure forming a receptacle, said structure terminating at a leading edge of said paperboard, said leading edge defining an opening;
A frame having a channel formed therein, said channel adapted to receive said leading edge of said paperboard structure;
An adhesive polymer contained wWiin said channel, said adhesive polymer, said
frame, and said leadmg edge of said paperboard to be induction heated to form a bond thereby
securing said leading edge within said channel.
2. The apparatus of Claim 1, wherein said frame channel includes a guiding edge to facilitate the introduction of said leading edge into said channel.
3. The apparatus of Claim 1, further comprising a paperboard insert secured wfthin said frame, thereby covering the opening defined by said frame.
4. The apparatus of Claim 1, further comprising a thermoformed insert secured within said frame, thereby covering the opening defined by said frame.
5. The apparatus of Claim 4, further comprising:
a reclosable spout formed in said insert.
6. The apparatus of Claim 1, wherein said container having said frame secured thereto, may be microwaved.
7. A method for making an aseptic container: providing a paperboard receptacle, said receptacle terminating at a leading edge of said paperboard, said leading edge defining an opening to said receptacle; providing a frame having a channel formed therein for receiving said leading edge
of said receptacle; introducing an adhesive polymer into said channel; inserting said leading edge into said adhesive polymer within said channel; bonding the leading edge, the adhesive polymer and the frame, using an induction welding process to activate said adhesive polymer.
8. The method of Claim 7, wherein said frame is of a plastic material.
9. The method of Claim 7, further comprising:
securing an insert material component to the interior of said frame, thereby
covering the opening defined by said frame.
10. The method of Claim 9, wherein said insert is of paperboard material.
11. The method of Claim 9, wherein said insert is of a plastic material.
12. An apparatus comprising:
A paperboard structure forming a receptacle, said structure terminating at a leadmg edge of said paperboard, said leading edge defining an opening;
A unitary cover having a channel formed therein, said channel adapted to receive said leading edge of said paperboard structure;
A polymer capable of having adhesive qualities contained within said channel, said
polymer, said unitary cover, and said leading edge of said paperboard to be induction heated to
form a bond thereby securing said leading edge within said channel .
13. The apparatus of Claim 12, wherein the polymer is a layer of olefin film which surrounds the entire cover.
14. The apparatus of Claim 12, wherein the polymer is a layer of olefin film secured
to the underside of said cover.
PCT/US1995/005718 1995-05-09 1995-05-09 Closure for paperboard container WO1996035614A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1995/005718 WO1996035614A1 (en) 1995-05-09 1995-05-09 Closure for paperboard container

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1995/005718 WO1996035614A1 (en) 1995-05-09 1995-05-09 Closure for paperboard container

Publications (1)

Publication Number Publication Date
WO1996035614A1 true WO1996035614A1 (en) 1996-11-14

Family

ID=22249101

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/005718 WO1996035614A1 (en) 1995-05-09 1995-05-09 Closure for paperboard container

Country Status (1)

Country Link
WO (1) WO1996035614A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1998036969A1 (en) * 1997-02-21 1998-08-27 Alfelder Kunststoffwerke Herm. Meyer Gmbh Method and device for induction sealing

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756493A (en) * 1972-07-07 1973-09-04 G Holmes Container
US4418834A (en) * 1982-09-13 1983-12-06 Container Corporation Of America Overcap ring with an integral peelable laminated structure
US4433808A (en) * 1982-05-03 1984-02-28 International Paper Company Pourable, recloseable lid
US4453666A (en) * 1982-05-03 1984-06-12 International Paper Company Tamper-evident top closure
US4495209A (en) * 1982-06-07 1985-01-22 Whiteside Michael G Method of forming, filling and hermetically sealing containers
US5252793A (en) * 1989-09-27 1993-10-12 Waddington Cartons Limited Microwave container assembly

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3756493A (en) * 1972-07-07 1973-09-04 G Holmes Container
US4433808A (en) * 1982-05-03 1984-02-28 International Paper Company Pourable, recloseable lid
US4453666A (en) * 1982-05-03 1984-06-12 International Paper Company Tamper-evident top closure
US4495209A (en) * 1982-06-07 1985-01-22 Whiteside Michael G Method of forming, filling and hermetically sealing containers
US4418834A (en) * 1982-09-13 1983-12-06 Container Corporation Of America Overcap ring with an integral peelable laminated structure
US5252793A (en) * 1989-09-27 1993-10-12 Waddington Cartons Limited Microwave container assembly

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Similar Documents

Publication Publication Date Title
US4459793A (en) Composite container construction
EP0356831A1 (en) Packaging container and blank therefor
EP0068718B1 (en) Hermetically sealable containers and method of sealing
EP3797077B1 (en) Flexible membrane with valve
OA10228A (en) Sealing cover for an opening of a container
JP2005206247A (en) Container cover provided with desiccating agent layer
EP0242720B1 (en) a method and an arrangement for the finishing of an opening arrangement on a packing container
MXPA03003649A (en) Apparatus for producing lined carton.
US4848649A (en) Package with tear opening strip device
US5157901A (en) Method for sealing retort container
GB2052455A (en) Container lid, and package and packaging method using same
GB2123786A (en) Covered containers
EP2001765B1 (en) A method for sealing a package and a package
US5308418A (en) Packing container for liquid, especially pressurized contents
EP2097334B1 (en) A cover of a package, a method for manufacturing the same and a package sealed with a cover and a method for sealing a package
WO1996035614A1 (en) Closure for paperboard container
TW338758B (en) A lid of a container for beverages and method of manufacturing the same
US20020190109A1 (en) Packing drum with a melt adhesive and charging with adhesive
GB2284585A (en) Sleeved trays
JP2836898B2 (en) Packaging container
EP1714907A1 (en) Reclosable food package
GB2120200A (en) Lidded containers
JP3744284B2 (en) Top sealing method for paper containers
EP0726211A1 (en) Recyclable package and method of forming it
EP4296192A1 (en) Method of producing packaging container comprising a valve

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CA JP

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载