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
  • 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
  • B65D81/02—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 specially adapted to protect contents from mechanical damage
  • B65D81/05—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 specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents
  • B65D81/07—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 specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using resilient suspension means
  • B65D81/075—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 specially adapted to protect contents from mechanical damage maintaining contents at spaced relation from package walls, or from other contents using resilient suspension means the contents being located between two membranes stretched between opposed sides of the package
• • 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
  • B65B31/00—Packaging articles or materials under special atmospheric or gaseous conditions; Adding propellants to aerosol containers
  • B65B31/02—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas
  • B65B31/021—Filling, closing, or filling and closing, containers or wrappers in chambers maintained under vacuum or superatmospheric pressure or containing a special atmosphere, e.g. of inert gas the containers or wrappers being interconnected
• • 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
  • B65D77/02—Wrapped articles enclosed in rigid or semi-rigid containers
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
  • 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
  • B65D81/18—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 providing specific environment for contents, e.g. temperature above or below ambient
  • B65D81/20—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
  • B65D81/2069—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere
  • B65D81/2076—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 providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere in an at least partially rigid container
• • 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
  • B65D2565/00—Wrappers or flexible covers; Packaging materials of special type or form
  • B65D2565/38—Packaging materials of special type or form
  • B65D2565/381—Details of packaging materials of special type or form
  • B65D2565/388—Materials used for their gas-permeability

Definitions

• This invention relates to improved packaging and relates particularly, but not exclusively, to packaging for fresh red meats wherein the packaging can be placed on shelves for a considerable period of time without apparent degradation as to colour and/or growth of bacteria.
• Description of Prior Art Hitherto there have been several proposals by us for the production of packaging of this type. Examples are seen in co-pending Patent Applications PCT/AU84/00131, PCT/AU85/00131, PCT/AU86/00339,
• the present invention relates to an improvement or modification in the invention shown " in at least one or more of PCT/AU86/00339, PCT/AU87/00243 and
• PCT/AU87/00297 It has been found necessary to provide for desired packaging of red meats to have a flexible web of gas permeable plastics material stretchingly engage across the meat. This arrangement places tension forces in the flexible web and makes the product more consumer acceptable.
• PCT/AU86/00339 describes a packaging of the type shown by Figures 1 and. 2 herein.
• PCT Patent Application PCT/AU87/00297 describes a packaging of the type shown by Figure 3 herein.
• FIGS 1 and 2 there is shown packaging of clear plastics material comprising a relatively rigid base 1 with an upper lid .
• Goods 3 are packaged within the base 1 and a skin wrapping material 7 skin wraps the goods 3 relative to the base 1.
• the skin wrapping material 7 and the lid 9 are bonded around a peripheral lip 5 as by heat bonding which seals the packaging.
• the lid 9 is relatively rigid and of similar thickness to that of the base 1.
• Both the base 1 and the lid 9 are substantially gas impervious in certain embodiments and the skin wrapping material 7 is a relatively thin web which is gas permeable.
• a free space 11 is provided above the skin wrapping material 7 and the lid 9 and a gas is provided within the free space 11 for enhancing preservation of the packaged goods 3.
• the gas can be provided to enhance the colour keeping properties as well as the non-bacteria growth properties.
• the flexible web 7 is gas permeable such that the gas within the free space 11 can permeate the web 7 to contact the goods 3 to enhance the keeping properties of the goods 3. It has been found that after an extended period of time, as for example several weeks, as the gas in free space 11 permeates the web 7 there is at least partial pressure equalization so that the web 7 is no longer tightly skin wrapping the goods 3. The appearance of the package can then be unpleasant and thus the package can be rejected by an intending purchaser.
• Certain embodiments enable the goods to be suspended between the base and the lid of the packaging and thus it is possible to enable the preserving gas to contact all surfaces of the goods by permeating through the gas permeable webs which are employed.
• This enables both the lid and base, in certain embodiments to be made of clear transparent plastics material so that all surfaces of the goods can be observed by an intending purchaser.
• a method of packaging goods within an outer packaging casing comprising providing a first outer packaging casing part and a second outer packaging casing part, at least one of the casing parts having a cup-shaped depression therein, and a web of skin packaging material over the depression, placing goods to be packaged between said web of skin 'packaging material and the other casing part, bringing the two casing parts together so that the goods stretch said web of skin packaging material, and sealing the two casing parts together so said web of skin packaging material is maintained stretchingly engaged with said goods.
• apparatus for producing packaged goods within an outer packaging casing comprising means for placing a first outer casing packaging part over a second outer casing packaging part at least one of the casing parts having a depression therein with a web of skin packaging material over the depression, means for relatively moving the casing parts together with goods between the casing parts so that when the casing parts are together the web of skin packaging material will be stretched by contacting with said goods, and means for sealing the two casing parts together so said web of skin packaging material will be stretchingly engaged with said goods.
• Figures 1 to 3 are prior art as referred to previously;
• Figure 4 is a side sectional view of one form ' of .preferred packaging according to the present invention prior to loading of goods therein;
• Figure 5 is a view similar to Figure 4 showing goods loaded therein;
• Figure 6 is a view similar to Figure 4 and 5 showing closing of the packaging
• Figure 7 is a top perspective view of the closed package
• Figure 8 is a side cross-sectional view showing a variation of a manufacturing method for providing the packaging;
• Figure 9 is a schematic view.,showing in diagrammatic form a typical packaging machine for producing the packaging shown in Figures 4 through 7; and
• Figure 10 is a schematic view showing in diagrammatic form a typical packaging machine for performing the method shown in Figure 8.
• a preferred package is comprised of an outer casing 201 and an inner envelope webs 203.
• the outer casing is composed of two parts - a first part 205 and a second part 207 which is substantially identical in size and shape to that of first part 205.
• the first part 205 is preferably hinged to the second part 207 as shown by the hinge centre line 209.
• Preferably the first part 205 and the second part 207 are thermo-formed in line end for end in a single web of plastics " material.
• the outer casing 201 is preferably of a plastics material such as P.V.C./P.E. formed into two distinct trays as shown.
• P.V.C. or P.V.C./E.V.A.
• the thickness of the outer casing 201 is in the order of 400 microns.
• P.V.C./E.V.A. the P.V.C. can be 400 micron thick and the E.V.A. 50 micron thick ⁇ T
• Layers of different plastics materials can be utilized to provide a multi-layered web to permit heat sealing together of the plastics packaging components and to provide for substantial exclusion of atmosphere into the package.
• the material of the inner envelope 203 is typically of a web of flexible plastics skin wrapping material and is comprised of polyethylene or a multi-layered web of polyethylene/E.V.A. or like material(s).
• a typical thickness for the inner envelope 203 is approximately 20 to 25 microns thick.
• the inner envelope 203 can be of a- linear low density polyethylene or a linear low density E.V.A. material.
• the inner envelope 203 is preferably heat sealed but it may otherwise be sealed around the peripheral edges of each of the portions 205 and 207 which define the outer casing 201.
• a suitable gas to enhance the keeping qualities of the packaged goods, particularly the colour keeping qualities, is retained between the inner envelope 203 and the outer casing 201.
• a suitable gas for enhancing the keeping qualities of red meat can conveniently be a combination of 0_ and C0 2 and/or nitrogen or any one of those gases .
• gases known for enhancing the keeping properties of the packaged goods can be used if desired.
• the gas is in the percentage of 20% C0 2 and 80% 0-.
• the 0 2 assists in retaining the red colour of red meats whilst the CO.- inhibits the growth of bacteria.
• the gas is at a -pressure slightly less than atmospheric pressure and hence the inner envelope web 203 is urged by atmospheric pressure into each respective casing 205 and 207.
• the plastics material chosen for webs of the inner envelope 203 is preferably such that certain gas can permeate therethrough. It is particularly preferred that the webs of inner envelope 203 allow 0 2 to readily permeate therethrough.
• Goods 213, such as red meats or other fresh foods or other goods, are then placed on one of the halves of the package. It can be seen that the goods 213 are placed onto the web of the inner envelope 203 causing it to stretch downwardly slightly. This is shown in the second part 207 in Figure 5.
• the first part 205 is then swung about hinge centre line 209 like the swinging of a clam shell, so that the first part 2- ⁇ 5 lies directly above the second part 207.
• the goods 213 cause deformation of the web of the inner envelope 203 in the first part 205 and possibly further deformation of the web of the inner envelope 203 in the second part 207.
• the webs of the inner envelope 203 are stretched both in the first part 205 and in the second part 207.
• the webs are also stretched across the flanges of each of the trays of the outer casing 201.
• a suitable gas such as of the type previously described may be provided in the space between the webs of the inner envelope 203 in the first part 205 and second part 207.
• This gas can be at a pressure less than atmospheric and less than the pressure of the gas between the respective webs of inner envelopes 203 and the first part 205 and the second part 207.
• the flanges of the trays of the outer casing 201 will align and can then be heat sealed together to form a sealed closed packaging as shown in Figure 7.
• the above packaging suspends the goods between the outer casing 201.
• the webs of the inner casing 203 are of a material which allows certain gases such as 0 2 to pass and thus the 0 2 in the gas which is in the spaces 211 can pass through the webs of the inner casing 203 and contact the outer surface "of the goods 213. Certain gases which may exude or be generated by the packaged goods can pass through the webs of the inner casing 203.
• the webs of the inner casing 203 are stretched over the goods 3, the webs will remain stretched should there be a tendency for gas pressure equalization between the space inside the inner casing 203 of the package, and between the inner casing 203 and the first part 205 and second part 207 after a period of time.
• Figure 8 shows a variation where instead of having a hinge connection between a first part 205 and a second part 207 so that the portions hinge together in a clam shell arrangement, there is provided two distinct webs of outer casing material 201, each with a plurality of tray depressions formed therein. Respective inner casing webs 203 can be provided across the depressions in each of outer casing webs 201. Suitable gases for enhancing the keeping properties of the packaged goods can be provided in the space 211 between the webs of outer casings 201 and webs of inner casings 203, in each web. The webs of inner casing 203 can be heat sealed to the outer casing 201 in each web thereby retaining that gas in the space 211.
• the two webs of outer casings 203 can be brought together so that each depression is in alignment, and prior to the two being brought together, goods 213 can be placed on the lower of the webs.
• goods 213 can be placed on the lower of the webs.
• the two webs of outer casing 203 can then be sealed by a heat sealing member to provide individual sealed packages.
• Figure 9 shows a schematic diagram of a 5 preferred machine for producing packages in accordance with Figures 4 through 7.
• a web of outer casing material 201 is fed from a stock roll supply 215.
• the web 201 passes to a thermo-forming station 216 where two tray shaped
• the ' two tray shaped depressions can be considered as a pair 217 one of which will constitute the first part 205 and the other of which will constitute the second part 207.
• the station 219 is substantially identical to the station for gas flushing and sealing shown in aforementioned PCT Patent Specification PCT/AU84/00131.
• a web of inner casing material 203 is supplied from a
• the pair of depressions 217 leave the inner casing and gas sealing station 219, they pass to a goods loading station 233 where goods 213 can be placed into 5 the second part 207 of the pair of depressions 217.
• the pair of depressions 217 then pass to a severing station 235 where only the first part 205 is severed from the web by a punch 236 around three sides of its depression. It is left interconnected with the flange along the edge which adjoins the depression of the second part 207.
• the severing station 235 may precede the goods loading station 233 if desired.
• the pair of depressions 217 then advance to a casing closing station 237 where the first part 205 is caused to swing by a casing moving part 218 upwardly relative to the web 201 to close the packaging.
• the closed packaging 239 is then advanced to a- gas flushing and heat sealing station 241.
• the gas flushing and heat sealing station 241 comprises an upper chamber part 243 and a lower chamber part 245 which are closed and in which a gas is injected so as to supply such gas between the webs of inner casings 203 and to contact the goods 213.
• Electrical impulse heat sealing surfaces (not shown) on the edges of the upper chamber part 243 which abut with the lower chamber part 245 can then be activated to heat seal the first part 205 to the second part 207.
• the packaging 239 is therefore sealed closed with a desired gas in the space 211 and with the inner casing 203 stretched over the goods 213. A desired gas is also between the inner casings 203 and contacting the goods 213.
• the closed packaging 239 is still retained in the web 201. Accordingly, it then passes to a punching station 247 where it is punched from the web 201 to cause it to fall by gravity to be discharged to a suitable collection area.
• the waste material in the web 201 can be rolled into a waste roll 249 for subsequent re-use.
• Figure 10 there is shown an embodiment of apparatus for producing packaging according to the method shown in Figure 8. Like components to those shown in the machine in Figure 9 have been provided with the same designations.
• the schematic diagram is basically self explanatory.
• each of the upper and lower webs 201 provides respectively the first container part 205 and the second container part 207.
• the depressions pass to the heat sealing station 241 where the first container parts 205 and the second container parts 207 are brought together and heat sealed.
• the second container parts 207 pass over a roll 271 and then under a further toothed roll 273 so that the respective depressions in each of the webs can be brought into alignment.
• the machines shown in Figures 9 and 10 can be arranged to produce a series of pairs of depressions 217 across a wide web 201 so that more than one pair of depressions 217 is processed simultaneously at each of the various stations.
• the first container part 205 may be of relatively flexible material such that the first container part 205 and the integrally attached web of inner casing 203 form a flexible bag onto which the goods 213 are received.
• the first container part 205 can be made of a strong plastics material sufficient to withstand the pressure of a person's finger pressing thereon to feel the goods 213 packaged within the package. In this connection it has been found that with red meat some purchasers like to press the meat to see if it meets their degree of firmness. By having the first container part 205 of such a flexible material it will inhibit rupturing of the first container part 205 when this pressing action occurs .
• the desired gas is sealed relative to the first casing part 205 and web of inner casing 203 prior to the goods 213 being loaded into the packaging.
• problems which could be encountered by contamination of the sealing surfaces such as at the upper peripheral lip by contamination from the goods 213 as they are loaded is avoided. Accordingly, the gas can be securely retained within the first container part 205.
• the second container part 207 - the lid - may be sealed around the upper peripheral lip 283 prior to being sealed to the first container part 205.
• the necessary desired gas may be placed between the web of inner casing 203 and the second cpntainer part 207 prior to such sealing.
• any of the embodiments described herein it is not essential to include a gas to enhance the keeping qualities of the packaged goods .
• the gas which is in the package between the web of skin packaging i.e. the web of inner casing 203 and the first container part 205, the web of inner casing 203 and the second container part 207, may be atmosphere.
• Such packaging may have use in certain applications and for certain goods.

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• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Chemical & Material Sciences (AREA)
• Dispersion Chemistry (AREA)
• Packages (AREA)
• Containers And Plastic Fillers For Packaging (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=3695608

Family Applications (1)

Country Status (3)

Families Citing this family (15)

Citations (1)

Family Cites Families (8)

• 1988
  • 1988-10-28 JP JP50857088A patent/JPH02501918A/ja active Pending
  • 1988-10-28 WO PCT/AU1988/000424 patent/WO1989003789A1/en not_active Application Discontinuation
  • 1988-10-28 EP EP19880909275 patent/EP0341275A4/en not_active Withdrawn

Patent Citations (1)

Non-Patent Citations (1)

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