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WO1996004186A1 - Emballage de produit alimentaire pouvant passer au four - Google Patents

Emballage de produit alimentaire pouvant passer au four Download PDF

Info

Publication number
WO1996004186A1
WO1996004186A1 PCT/US1995/009605 US9509605W WO9604186A1 WO 1996004186 A1 WO1996004186 A1 WO 1996004186A1 US 9509605 W US9509605 W US 9509605W WO 9604186 A1 WO9604186 A1 WO 9604186A1
Authority
WO
WIPO (PCT)
Prior art keywords
package
base
projection
food product
flange
Prior art date
Application number
PCT/US1995/009605
Other languages
English (en)
Inventor
Paul W. Gics
Original Assignee
Gics & Vermee, L.P.
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 Gics & Vermee, L.P. filed Critical Gics & Vermee, L.P.
Priority to AU32721/95A priority Critical patent/AU3272195A/en
Publication of WO1996004186A1 publication Critical patent/WO1996004186A1/fr

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
    • 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
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint 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
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • 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
    • B29C66/23—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations
    • B29C66/232—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being multiple and parallel or being in the form of tessellations said joint lines being multiple and parallel, i.e. the joint being formed by several parallel joint lines
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/302—Particular design of joint configurations the area to be joined comprising melt initiators
    • B29C66/3022—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined
    • B29C66/30223—Particular design of joint configurations the area to be joined comprising melt initiators said melt initiators being integral with at least one of the parts to be joined said melt initiators being rib-like
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining 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
    • 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
    • B29C66/70—General 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
    • B29C66/72—General 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
    • B29C66/723—General 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B65D25/00—Details of other kinds or types of rigid or semi-rigid containers
    • B65D25/20—External fittings
    • B65D25/205—Means for the attachment of labels, cards, coupons or the like
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • 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
    • B29C66/70—General 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
    • B29C66/71—General 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
    • 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
    • B29C66/70—General 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
    • B29C66/72—General 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
    • B29C66/723—General 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
    • B29C66/7232—General 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
    • B29C66/72321—General 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
    • 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
    • B29C66/70—General 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
    • B29C66/72—General 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
    • B29C66/723—General 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
    • B29C66/7232—General 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
    • B29C66/72327—General 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 natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2711/00—Use of natural products or their composites, not provided for in groups B29K2601/00 - B29K2709/00, for preformed parts, e.g. for inserts
    • B29K2711/12—Paper, e.g. cardboard
    • B29K2711/123—Coated
    • 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
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
    • B65D2581/3439—Means for affecting the heating or cooking properties
    • B65D2581/3454—Microwave reactive layer having a specified optical density
    • 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
    • B65D2581/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D2581/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within
    • B65D2581/3437—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within specially adapted to be heated by microwaves
    • B65D2581/3486—Dielectric characteristics of microwave reactive packaging
    • B65D2581/3494—Microwave susceptor

Definitions

  • This invention relates to an ovenable food package, and more particularly to an ovenable food package having a base, a sidewall extending from the base which terminates in a flange and at least one projection made of a meltable plastic material extending from at least a portion of the flange.
  • the projection facilitates heat sealing of a lid to the flange in order to enclose the package.
  • Packaged foods and more particularly, the so-called "eat-in-box” foods are becoming increasingly popular with consumers. These foods offer the consumer a fast and convenient way to prepare and serve a meal. Typically, these packaged foods are bought in the frozen foods section of a supermarket, brought home and then cooked either in a conventional or microwave oven.
  • the "eat-in-box” foods offer the added convenience of allowing the consumer to merely place the entire food package into the oven, and when cooked, eat the food right out of the package. Thus, there is no need to transfer the packaged food to a separate cooking container or to a dish.
  • the first is a die cut paperboard container having a paperboard lid.
  • the paperboard is coated with a plastic material, such as polyester, in order to make the paperboard ovenable.
  • microwave susceptor material such as aluminum, is interposed between the paperboard and the plastic material in order to make the package microwavable.
  • the lid is removed from the container and the container is placed directly in the oven. After cooking, the consumer can eat right out of the container.
  • These paperboard containers while effective, lack some rigidity and strength and are generally associated with lower cost frozen dinners and entrees.
  • the second type of "eat-in-box” package involves the use of a plastic container, made of crystalized polyethylene terephthalate (hereinafter referred to as "c-PETE") which is covered by a flexible aluminum foil lid.
  • c-PETE crystalized polyethylene terephthalate
  • the container with the aluminum foil lid is then subsequently placed in a cardboard box.
  • the consumer In order to cook these foods, the consumer must first remove the container having the lid from the box, remove the lid and then place the container without the lid into the oven. After cooking, the consumer can then eat the food right out of the container.
  • this package requires more steps to cook than the paperboard container, but does offer the advantage of providing a sturdy, aesthetically pleasing container out of which the consumer can eat.
  • a package for containing a food product which comprises a base, a sidewall extending from the base, the sidewall terminating in a flange and at least one projection made of a meltable plastic material extending from at least a portion of the flange.
  • the projection facilitates heat sealing of a paperboard lid coated with plastic to the flange in order to enclose the food product in the package.
  • the projection is triangular in cross-section having a base disposed adjacent to the flange and tapering to a point opposite the base.
  • the projection preferably extends about 0.10 to 0.50 inches from the flange.
  • Figure 1 is a perspective view of the base and sidewall of the food package.
  • Figure 2 is a top plan view of the food package shown in Figure 1.
  • Figure 3 is a bottom plan view of the food package shown in Figure 1 also showing the label.
  • Figure 4 is a cross-sectional view taken along line 4-4 of Figure 2.
  • Figure 5 is a detailed cross-sectional view taken along line 5-5 of Figure 2.
  • Figure 6 is a cross-sectional view showing how the lid is heat sealed onto the base.
  • Figure 7 is a top plan view of the food package after the lid has been secured thereto.
  • Figure 8 is a cross-sectional view similar to Figure 6 only showing the lid being removed and the food package, with the food product disposed therein, resting on the support surface of a microwave oven.
  • Figure 9 is a perspective view of another embodiment of the base and sidewall showing two sets of projections, one continuous and one discontinuous.
  • Figure 10 is a cross-sectional view taken along line 10-10 of Figure 9.
  • This package 20 includes a non-circular base 22, which is shown in the Figures in the form of a square.
  • the base 22 is preferably made of C-PETE embedded with microwave susceptor material, such as aluminum or alumina although it will be understood that other materials, such as paperboard coated with a high temperature coating, such as polyester, can be used.
  • the materials used, the method of making these materials and the method of forming the base 22 are disclosed in co-pending and commonly owned United States Patent Application (Attorney Reference No. 120693-5) which is expressly incorporated by reference herein.
  • the base 22 consists of a floor portion 24 and a sidewall portion 26.
  • the sidewall portion 26 terminates in a horizontal flange portion 30 that extends generally horizontally from the sidewall portion 26.
  • the base 22 has integrally formed therein a plurality of raised ovals with two smaller ovals such as ovals 40 and 42 being sandwiched by two larger ovals 44 and 46 with this pattern being repeated around the base 22.
  • the ovals, such as larger oval 44 has sidewall 50 ( Figure 4) that extends upwardly and inwardly from the floor portion 24 of the base 22 and then terminates in a central plateau 51.
  • smaller oval 52 is raised from floor portion 24 and has a sidewall 54 that extends upwardly and inwardly from the floor portion 24 and terminates in a central plateau 56.
  • ovals are shown having a central plateau, it will be appreciated that the upper portion of the oval can be rounded or can form any other shape (such as - 5 - coming to a point) and still be considered within the scope of the invention.
  • a label 60 is shown disposed on the underside 24a of floor portion 24.
  • This label 60 can contain food product identification indicia 62 and nutritional information 64 which does not fit (or which is not desired for marketing reasons) on other portions of the food package.
  • the label 60 is made of paper and is secured to the underside 24a of the floor portion 24 by an adhesive coating. As is known to those skilled in the art, the label 60 can be applied with label application machinery.
  • a projection 70 is shown extending from the horizontal flange portion 30.
  • This projection 70 is made of a meltable plastic material, such as C-PETE. It will be appreciated that the projection 70 can be integrally formed with the horizontal flange portion 30 although the invention is not limited to an integrally formed projection 70 but also contemplates other methods of forming the projection.
  • the projection 70 is solid and is triangular in cross-section and consists of a base portion 72 adjacent to the horizontal flange portion 30.
  • the projection 70 which is not shown to scale in Figure 5 for purposes of ease of understanding and visualizing the invention, preferably extends about .010 to .050 inches from base portion 72 to point 74.
  • the projection 70 is shown as being continuous around the horizontal flange portion 30.
  • the projection 70 facilitates the sealing of a lid 76 to the package 20.
  • the base 22, holding a pizza 80 is shown.
  • the lid 76 which is preferably made of paperboard 76a coated at least on its underside with a polyester coating 76b, is positioned over the package 22 containing the pizza 80.
  • a heat seal die 82 is then brought into contact with the top of the lid 76 and presses the lid 76 into contact with the projection 70.
  • An anvil 84 is provided underneath flange 30 in order to provide support for pressing the lid 76 against flange 30.
  • the heat seal die 82 applies heat to the lid 76, which heat is transferred through the lid 76 and then to the projection 70.
  • the heat melts the polyester coating 76b to the projection 70 to form a tight secure bond between the lid 76 and the horizontal flange portion 30.
  • Another, less preferred, method of securing the lid to the base is to provide a lid having a nickel coated mica surface which is subsequently electromagnetically secured to the flange.
  • the projection 70 provides several advantages. First, it provides a starting point to facilitate melting of the coating 76b to the horizontal flange portion 30. That is, the polyester coating 76b of the lid 76 initially contacts the projection at point 74 and thus initially contacts the package 22 at a smaller surface area. It will be appreciated that it is much easier to start to melt the point 74 because it has a smaller cross-sectional area, than it would be if there was no projection and the lid 76 would have to be melted directly onto horizontal flange portion 30. This allows a paperboard lid coated with polyester to be applied to a C-PETE base, something those skilled in the art have been unable to do successfully up to this time.
  • the projection 70 upon melting can absorb variations in the wall thickness of the horizontal flange portion 30.
  • a problem in the prior art was that sealing a lid directly to the horizontal flange, if the horizontal flange had variations in thickness, can create gaps so that heat from the sealing die was not transferred from the lid to the horizontal portion. Because there is no melting of the lid to the flange at these gaps, the lid sometimes is not properly sealed, thus creating gaps through which air and contaminants could get into the package and through which the food in the package can leak out of the package.
  • the projection 70 when melted will tend to flow and even out the variations in wall thickness so that a secure and tight seal is made between the lid 76 and the horizontal portion 30.
  • the package 22 itself may be formed such that portions of the horizontal flange portion 30 are at different heights. Without projection 70 this would mean that the lid would not contact the portions of the horizontal flange portion 30 that are lower than other portions of the horizontal portion. This causes the problems mentioned above. With the projection 70, even if the package is formed so that the horizontal flange portion 30 is disposed at different heights, the lid 76 contacts the point 74 of the projection 70 all around the horizontal flange portion 30 thus insuring a tight and secure seal between the lid 76 and the horizontal flange portion 30.
  • the lid 76 contains score lines 90 which facilitates removing a portion of the lid 76 from the package. It is further preferred to provide a finger tab, defined by score lines 92. In use, a consumer breaks the score lines 92 and places a finger underneath the lid 76 and pulls the lid 76 away from the corner in which score lines 92 are disposed. Score lines 90 facilitate tearing of a portion of the lid 76. Score lines 90 and 92 define a removable portion 94. The removable portion 94 of the lid means is totally removed from the portion 96 of the lid that remains secured to the flange 30.
  • the removable portion 94 can be discarded, or, more preferably can be used during microwave ovening of the food product, as is described in co-pending and commonly owned United States Patent Application (Attorney Reference No. 120693-5).
  • pizza 80 is shown having toppings 102 placed thereon.
  • the pizza 80 is supported on the plateaus of the ovals such as plateaus 51 and 56.
  • an interior gap 104 is maintained between the bottom portion of the pizza crust 106 and floor portion 24.
  • the interior gaps, such as gap 104, created between the pizza 80 and the base enhance the uniform heating of the pizza 80.
  • the steam created by moisture in the frozen pizza which is heated is able to be vented from the bottom of the pizza 80 thus preventing sogginess of the pizza and creating a crispy crust.
  • This steam also creates a "steam blanket" above the pizza 80 that enhances melting of the cheese on top of the pizza 80.
  • the exterior gap 110 is created by a plurality of leg members, four of which, leg members 130, 132, 134 and 136 are shown in Figures 1-3.
  • the leg members 130, 132, 134 and 136 extend from the corners of the base 22 in order to maximize the exterior gap 110 created between the base 22 and the support surface 112 of the food heating apparatus.
  • the leg members 130, 132, 134, 136 are further preferably integrally formed in the base 22. It will be appreciated that the exterior gap 110 also prevents the label 60 from coming into contact with support surface 112. This resists undesired transfer of the printing on the label 60 to the support surface 112.
  • Figures 9 and 10 show another embodiment of the ovenable food package in which like reference characters to those referred to in Figures 1-8 refer to like features in this embodiment.
  • Figures 9 and 10 illustrate an embodiment in which there is one continuous projection 210 and a plurality of smaller discontinuous projections 212, 214, 216, 218, 220, 222, 224 and 226.
  • projections 210 and 212 have a similar cross-sectional shape and positioning of the projections can be varied and still be within the scope of this invention.
  • an ovenable food package includes a C-PETE base having a projection which facilitates heat sealing a lid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Package Specialized In Special Use (AREA)

Abstract

Emballage servant à contenir un produit alimentaire. Cet emballage comprend une base (24), une paroi latérale s'étendant depuis la base et se terminant par un rebord (30), ainsi qu'au moins une saillie (70) en matière plastique fusible s'étendant depuis au moins une partie du rebord (30). La saillie facilite le thermosoudage d'un couvercle en carton (76), revêtu de plastique, sur le rebord, afin de confiner le produit alimentaire (102) dans l'emballage.
PCT/US1995/009605 1994-08-03 1995-07-27 Emballage de produit alimentaire pouvant passer au four WO1996004186A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU32721/95A AU3272195A (en) 1994-08-03 1995-07-27 Ovenable food package

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US28536994A 1994-08-03 1994-08-03
US08/285,369 1994-08-03

Publications (1)

Publication Number Publication Date
WO1996004186A1 true WO1996004186A1 (fr) 1996-02-15

Family

ID=23093937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1995/009605 WO1996004186A1 (fr) 1994-08-03 1995-07-27 Emballage de produit alimentaire pouvant passer au four

Country Status (2)

Country Link
AU (1) AU3272195A (fr)
WO (1) WO1996004186A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999024331A1 (fr) * 1997-11-06 1999-05-20 Gics & Vermee, L.P. Emballage pour produits alimentaires constitue d'une barquette et d'une enveloppe entourant ladite barquette
FR2856657A1 (fr) * 2003-06-30 2004-12-31 Bonduelle Sa Ets Procede et installation de conditionnement de produits alimentaires sous atmosphere modifiee.
EP1762503A1 (fr) * 2005-09-07 2007-03-14 Alcan Technology & Management Ltd. Récipient semi-rigide stérilisable avec opercule et étiquette
CZ298747B6 (cs) * 1998-04-01 2008-01-16 Janssen Pharmaceutica N. V. Derivát pyridinu, způsob jeho výroby a použití a farmaceutická kompozice s jeho obsahem
EP1681245A4 (fr) * 2003-11-04 2008-01-23 Toyo Seikan Kaisha Ltd Recipient en polyester, procede de production du recipient et procede de scellement du recipient en polyester
US20100297310A1 (en) * 2009-05-20 2010-11-25 Garbe Joanne J Tray including a flow restricting element for food products
US20210002018A1 (en) * 2019-06-04 2021-01-07 Silver Plastics Gmbh & Co. Kg Packaging tray with a profiled sealing edge

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0063108A2 (fr) * 1981-04-10 1982-10-20 AB Akerlund & Rausing Matériau d'emballage
US4373636A (en) * 1981-02-18 1983-02-15 Hoffman Louis S Container
FR2545470A1 (fr) * 1983-05-03 1984-11-09 Monoplast Sa Procede de fermeture etanche de recipients en matiere plastique et recipients obtenus selon ce procede
DE3733133A1 (de) * 1987-10-01 1989-04-13 Aluminium Walzwerke Singen Becher aus kunststoff mit einer deckfolie
EP0399981A2 (fr) * 1989-05-24 1990-11-28 Ab Cerbo Procédé pour la fermeture d'un emballage
EP0492052A2 (fr) * 1990-12-28 1992-07-01 Nippla Co., Ltd. Récipient étiqueté dans le moule avec saillie allongée de fond et son procédé de fabrication

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4373636A (en) * 1981-02-18 1983-02-15 Hoffman Louis S Container
EP0063108A2 (fr) * 1981-04-10 1982-10-20 AB Akerlund & Rausing Matériau d'emballage
FR2545470A1 (fr) * 1983-05-03 1984-11-09 Monoplast Sa Procede de fermeture etanche de recipients en matiere plastique et recipients obtenus selon ce procede
DE3733133A1 (de) * 1987-10-01 1989-04-13 Aluminium Walzwerke Singen Becher aus kunststoff mit einer deckfolie
EP0399981A2 (fr) * 1989-05-24 1990-11-28 Ab Cerbo Procédé pour la fermeture d'un emballage
EP0492052A2 (fr) * 1990-12-28 1992-07-01 Nippla Co., Ltd. Récipient étiqueté dans le moule avec saillie allongée de fond et son procédé de fabrication

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999024331A1 (fr) * 1997-11-06 1999-05-20 Gics & Vermee, L.P. Emballage pour produits alimentaires constitue d'une barquette et d'une enveloppe entourant ladite barquette
CZ298747B6 (cs) * 1998-04-01 2008-01-16 Janssen Pharmaceutica N. V. Derivát pyridinu, způsob jeho výroby a použití a farmaceutická kompozice s jeho obsahem
FR2856657A1 (fr) * 2003-06-30 2004-12-31 Bonduelle Sa Ets Procede et installation de conditionnement de produits alimentaires sous atmosphere modifiee.
EP1681245A4 (fr) * 2003-11-04 2008-01-23 Toyo Seikan Kaisha Ltd Recipient en polyester, procede de production du recipient et procede de scellement du recipient en polyester
US8465817B2 (en) 2003-11-04 2013-06-18 Toyo Seikan Kaisha, Ltd. Polyester container
EP1762503A1 (fr) * 2005-09-07 2007-03-14 Alcan Technology & Management Ltd. Récipient semi-rigide stérilisable avec opercule et étiquette
US20100297310A1 (en) * 2009-05-20 2010-11-25 Garbe Joanne J Tray including a flow restricting element for food products
US20210002018A1 (en) * 2019-06-04 2021-01-07 Silver Plastics Gmbh & Co. Kg Packaging tray with a profiled sealing edge

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