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
  • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
  • B65D1/12—Cans, casks, barrels, or drums
  • B65D1/14—Cans, casks, barrels, or drums characterised by shape
  • B65D1/16—Cans, casks, barrels, or drums characterised by shape of curved cross-section, e.g. cylindrical
  • B65D1/165—Cylindrical cans
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D51/00—Making hollow objects
  • B21D51/16—Making hollow objects characterised by the use of the objects
  • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
  • B21D51/2615—Edge treatment of cans or tins
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
  • B21D51/00—Making hollow objects
  • B21D51/16—Making hollow objects characterised by the use of the objects
  • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
  • B21D51/2653—Methods or machines for closing cans by applying caps or bottoms
• • 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
  • B65B3/00—Packaging plastic material, semiliquids, liquids or mixed solids and liquids, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
  • B65B3/02—Machines characterised by the incorporation of means for making the containers or receptacles
  • B65B3/027—Making containers from separate body and end-parts
• • 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
  • B65B55/00—Preserving, protecting or purifying packages or package contents in association with packaging
  • B65B55/02—Sterilising, e.g. of complete packages
  • B65B55/04—Sterilising wrappers or receptacles prior to, or during, packaging
  • B65B55/06—Sterilising wrappers or receptacles prior to, or during, packaging by heat
• • 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
  • B65B7/2892—Securing closures on containers by deformation of the container rim
• • 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
  • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
  • B65D7/12—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls
  • B65D7/34—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls
  • B65D7/36—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal characterised by wall construction or by connections between walls with permanent connections between walls formed by rolling, or by rolling and pressing
• • 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
  • B65D7/00—Containers having bodies formed by interconnecting or uniting two or more rigid, or substantially rigid, components made wholly or mainly of metal
  • B65D7/42—Details of metal walls
• • 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
  • B65D79/00—Kinds or details of packages, not otherwise provided for
  • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
  • B65D79/008—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars
  • B65D79/0081—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a rigid or semi-rigid container, e.g. in bottles or jars in the bottom part thereof
• • 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
  • B65D79/00—Kinds or details of packages, not otherwise provided for
  • B65D79/005—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting
  • B65D79/0087—Packages having deformable parts for indicating or neutralizing internal pressure-variations by other means than venting the deformable part being located in a closure, e.g. in caps or lids

Definitions

• Metal tin can for a food product.
• the present invention relates to a metal can, for the preservation of a sterilized food product by a heat treatment after closing the box.
• the cans were formed by a portion of rectangular sheet 10 folded and welded to form a body, a bottom 11 and a cover 12 formed of sheet metal plates being assembled at both ends thereof.
• a can is called a "three-piece" box because it implements three separate elements assembled by welding or crimping.
• cans have been produced by stamping a sheet, said flank, so as to form in a single one-piece body 20 the bottom and the side wall of the body of the box. .
• a lid 23 formed of a sheet metal plate then makes it possible to close this box.
• Such boxes, whose bottom and side wall form a single piece, are called "two-piece" boxes.
• this box has a variable thickness, depending on the height in the box, in a range of + 25% to -25% of the initial thickness of the box. flank.
• FIG. 4 is a section of such a box 30.
• the thickness "e” of the center of the bottom 31 of this box is substantially equal to the thickness of the sidewall having been stamped.
• the thickness of the bottom is between + 0% and -15% of this thickness "e", its shaping may cause local thinning slightly.
• the thickness "e” of the wall 33 is reduced to 20% of the thickness "e” of the center of the bottom.
• the cover 32 has the thickness "e” of the sheet in which it has been formed.
• This DWI technology makes it possible to produce boxes, called “stretched wall boxes", which are lighter than other types of boxes. Their characteristics make them advantageous for use as a beverage can, but they remain unsuitable for use as cans of food products. Indeed, the latter must be subjected, after their closure, sterilization by heat treatment which induces variations, positive and negative, the internal pressure in the box.
• the present invention aims to overcome these disadvantages of the prior art.
• the invention aims to provide metal cans for the preservation of a sterilized food product by heat treatment after closing the box, using an optimized amount of material.
• Another object of the invention is to provide such boxes whose sterilization by heat treatment, after closure, is facilitated and consumes a minimum amount of energy.
• the invention also aims to enable the manufacture and easy implementation of such boxes, using the maximum material and elements identical or similar to those used for boxes of the prior art.
• a metal tin for the preservation of a sterilized food product by a heat treatment after the closure of the box, consisting of a body monobloc forming the bottom and the side wall of the box, and a lid assembled on the body to close it, the minimum thickness of the side wall being between 20% and 60% of the thickness of the center of the bottom , the height of the box being, according to the invention, between 1.5 and 3.5 times its width, and preferably between 1.7 and 3 times, and the bottom and / or the lid of the box having a central wall of convex shape outwardly connected to the side wall by a peripheral groove opening outwardly.
• Such a can can be manufactured with an optimized amount of material, and can undergo sterilization heat treatment without damage and consuming less energy than the prior art cans.
• the internal pressure of the box is greater than the atmospheric pressure.
• This feature in combination with the other features of the box according to the invention, contributes to the rigidity of the box.
• said peripheral groove has a first wall connected to the convex central wall, a second wall connected to a peripheral zone of connection to the side wall of the box, and a bottom forming a rounded, and: the first wall forms an angle of between 2 ° and 45 ° with the axis of the box,
• connection between the first wall and the central wall forms a radius of radius greater than 0.5 mm, the depth of the groove is between 1 mm and 7 mm, and
• the rounding of the bottom of the groove has a radius less than 5 mm.
• a bottom or cover having these characteristics allows the box to have a good resistance to internal pressure.
• the lid consists of a disk made of steel-based material, the capacity of the box is 212 ml, 425 ml or 850 ml, and these contents are respectively associated diameter lids 52 mm, 65 mm or 83 mm.
• the lid consists of an aluminum disk
• the capacity of the box is 212 ml, 425 ml or 850 ml
• these contents are respectively associated lids with a diameter of 52 mm, 63 , 7 mm and 81.5 mm.
• moldings are formed on the side wall of the box so as to increase its resistance to external pressure.
• the present invention also relates to a one-piece body of metal tin, for the preservation of a sterilized food product by a heat treatment after closing the box, the body having a bottom and a side wall, the minimum thickness of the wall Lateral being between 20% and 60% of the thickness of the center of the bottom, the height of the body being, according to the invention, between 1.5 times and 3.5 times its width, and preferably between 1.7 and 3 times, and the bottom having a central wall of convex shape outwardly connected to the side wall by a peripheral groove opening outwardly.
• This body makes it possible to manufacture a can as described above.
• the peripheral groove of this body has a first wall connected to the convex central wall, a second wall connected to a peripheral zone of connection to the side wall of the box, and a bottom forming a rounded, and:
• the first wall forms an angle of between 2 ° and 45 ° with the axis of the box
• connection between the first wall and the central wall forms a radius of radius greater than 0.5 mm
• the depth of the groove is between 1 mm and 7 mm
• the rounding of the bottom of the groove has a radius less than 5 mm.
• moldings are formed on the side wall of the body so as to increase its resistance to external pressure.
• Figure 1 is a schematic representation of the elements constituting a can of the type "three pieces" of the prior art
• Figure 2 is a schematic representation of the elements constituting a can of the type "two pieces" of the prior art;
• Figure 3 is a section of the box of Figure 2;
• FIG. 4 is a section of a stretched wall box of the prior art
• FIG. 5 is a section of a can according to one embodiment of the invention.
• FIG. 5 is a schematic section of a cylindrical box 40 according to a preferred embodiment of the invention.
• the side wall 43 of this box has been stretched with "DWI" technology.
• DWI thinnest thickness
• e ' is between 20% and 60%, and preferably between 30% and 50%, of the thickness "e" of the middle of the bottom 41.
• This box To enhance the rigidity of this box, is added to its contents, before closing, a substance which, by vaporizing, will bring an overpressure inside the box.
• This substance which may for example be liquid nitrogen, has the effect of stiffening the pressurized box and improve its resistance to both lateral external pressure and vertical force.
• Food cans unlike beverage cans, must be sterilized by heat treatment after they are closed.
• This sterilization which involves heating the contents of the can at a temperature of about 110 ° C to 150 ° C (preferably between 110 and 135 °), generates an increase in the pressure in the can to about 3 bar . This increase is greater for pressurized boxes, where the pressure can reach 5 bar.
• the side wall of the box deforms very little under the effect of this pressure. Only the bottom and lid deform, and allow expansion of the can, thus limiting the increase in internal pressure during the sterilization process. For a given volume box, the possible expansion of the bottom and lid is even more important that their sizes are important.
• the height "h" of the box must be greater than its diameter "D". This height must thus be between 1.5 and 3.5 times, and preferably between 1.7 and 3 times its diameter "D".
• the box 40 shown in Figure 5 has a height h which is between 1.7 and 3 times its diameter "D", which optimizes the amount of metal used for its manufacture.
• the cover 42 and the bottom 41 have a particular shape having a central wall, respectively 421 and 411, of convex shape towards the outside, connected to the wall lateral of the box by a peripheral groove, respectively 420 and 410, opening outwards.
• This particular shape facilitates the elastic deformation of the bottom and the lid in case of internal overpressure. Backgrounds and lids of this type are known in themselves, and are described in particular in document EP 1 813 540.
• the lid 42 thus has:
• peripheral groove 420 having a first wall 423 connected to the central wall 421, a second wall 424 connected to the peripheral zone 422, and a bottom 425 forming a rounded.
• the first wall 423 forms an angle of about 45 °, and in any case between 2 ° and 45 ° with the axis of the box; the connection between the first wall 423 and the central wall forms a radius of radius greater than 0.5 mm; the depth of the groove 422 is between 1 mm and 7 mm; and the rounding of the bottom 425 of the groove has a radius less than 5 mm.
• peripheral groove 410 having a first wall 413 connected to the central wall 411, a second wall 414 connected to the peripheral zone 412, and a bottom 415 forming a rounded.
• the first wall 413 forms an angle of about 5 °, and in any case between 2 ° and 45 ° with the axis of the box; the connection between the first wall 413 and the central wall 411 forms a radius of radius greater than 0.5 mm; the depth of the groove 410 is between 1 mm and 7 mm; and the rounding of the bottom 415 of the groove has a radius less than 5 mm.
• the grooves 410 and 420 having these features facilitate the deformation respectively of the bottom and the lid of the box 40.
• the increase in its internal pressure causes the deformation, temporary and reversible , bottom 41 and lid 42, thereby increasing the internal volume of the box.
• This increase in volume makes it possible to limit the effective pressure in the box 40 to values that are not likely to damage it.
• the lid 42 and the bottom 41 for a better resistance to the internal pressure, it is therefore possible to manufacture a pressurized stretched wall box that can be sterilized by heat treatment, and whose ratio between the height and the diameter can be chosen so to optimize the amount of metal used.
• the lid alone or that the bottom alone, is designed to have a good resistance to internal pressure.
• the volumes of the cans are standardized, in particular by the standards EN 13 025 to 13 029.
• the modifications of the proportions of boxes with a view to their optimization must therefore be made, preferably, while maintaining identical volumes.
• the sizes of the lids of cans are also standardized.
• the respect of these standards by the box manufacturers is important, the installation of the lid for closing boxes is not made by the manufacturer of the boxes, but by the canister that fills the box.
• the lids used must be adapted to the crimping machines used by the canner.
• lids with a diameter of 65 mm for 425 ml containers
• the boxes having the features of the invention can be thermally sterilized more quickly and using less energy than the boxes of the prior art. Indeed, the proportions of these boxes allow them to have a larger surface of heat exchange with the outside, which facilitates their heating. In addition, the thickness of food to be heated in the box is less important, because of the small width thereof. The side walls are less thick, they transmit better heat. Finally, the total amount of metallic material that is heated during sterilization a box is less important, which consumes less energy.
• the boxes having the features of the invention may also have dimensions making them suitable for more efficient and more compact storage.
• a type of pallet used has a length of 1200 mm, a width of 800 mm, and its height must be between 1000 and 1030 mm.
• the size of the lid is not necessarily equal to the width of the side wall of the box. It is indeed possible to provide a retreint at the top of this side wall, for crimping a cover of dimension smaller than the width of the wall. It is also possible in some cases to crimp a lid of larger size than the width of the box.
• the present invention can be implemented for boxes closed by covers of dimension between 20 mm and 153 mm. However, it is preferably implemented for boxes closed by covers of dimension between 52 mm and 99 mm.
• the present invention applies mainly to cylindrical cans, to quasi- cylindrical boxes, to polygonal section boxes (hexagonal, octagonal ...), to boxes whose side walls are slightly curved "in barrel", or to boxes of different shapes likely to have the same proportions.
• the body of the box constituting its bottom and its side walls, is also covered by the present application independently of its lid, in particular if it has the characteristics enabling it to form a box according to the invention when it is associated with a usual lid not being shaped to deform.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Ceramic Engineering (AREA)
• Rigid Containers With Two Or More Constituent Elements (AREA)
• Food Preservation Except Freezing, Refrigeration, And Drying (AREA)
• Containers Having Bodies Formed In One Piece (AREA)
• Packages (AREA)
• Stackable Containers (AREA)

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Applications Claiming Priority (2)

Related Child Applications (2)

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Family Applications (1)

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Cited By (2)

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Citations (6)

Family Cites Families (17)

• 2009
  • 2009-12-23 FR FR0959527A patent/FR2954296B3/fr not_active Expired - Lifetime
• 2010
  • 2010-12-21 US US13/518,609 patent/US20120312824A1/en not_active Abandoned
  • 2010-12-21 KR KR1020127016715A patent/KR101835088B1/ko active IP Right Grant
  • 2010-12-21 CN CN201080062087.5A patent/CN102834321B/zh not_active Expired - Fee Related
  • 2010-12-21 AU AU2010334722A patent/AU2010334722A1/en not_active Abandoned
  • 2010-12-21 EP EP10812984.2A patent/EP2516281B1/fr not_active Not-in-force
  • 2010-12-21 ES ES10812984.2T patent/ES2615525T3/es active Active
  • 2010-12-21 JP JP2012545385A patent/JP2013515651A/ja active Pending
  • 2010-12-21 PL PL10812984T patent/PL2516281T3/pl unknown
  • 2010-12-21 BR BR112012015724A patent/BR112012015724A2/pt not_active IP Right Cessation
  • 2010-12-21 WO PCT/FR2010/052849 patent/WO2011077034A1/fr active Application Filing
  • 2010-12-21 RU RU2012131130/12A patent/RU2555949C2/ru not_active IP Right Cessation
  • 2010-12-21 NZ NZ600781A patent/NZ600781A/xx not_active IP Right Cessation
  • 2010-12-21 CA CA2785866A patent/CA2785866A1/fr not_active Abandoned
• 2012
  • 2012-06-22 MA MA34994A patent/MA33841B1/fr unknown
  • 2012-07-17 ZA ZA2012/05338A patent/ZA201205338B/en unknown
• 2014
  • 2014-11-26 US US14/554,103 patent/US20150082749A1/en not_active Abandoned
• 2015
  • 2015-08-21 JP JP2015163417A patent/JP2016027984A/ja active Pending

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