Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
  • A47J36/00—Parts, details or accessories of cooking-vessels
  • A47J36/02—Selection of specific materials, e.g. heavy bottoms with copper inlay or with insulating inlay
• • 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
  • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
  • B21D51/22—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like pots, e.g. for cooking
• • 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
  • B65D81/38—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 with thermal insulation

Definitions

• the present invention relates to a cooking vessel having a side wall connected to a bottom consisting of at least three layers of materials including an upper layer, a lower layer and an intermediate layer, said bottom having a void space extending around its periphery and delimited between the upper layer, the lower layer, and the edge or a peripheral portion of the intermediate layer.
• a cooking utensil whose bottom has particular properties, for example by allowing a thermal break or mechanical discontinuity between the different layers of materials that constitute it.
• US Pat. No. 4,204,607 discloses a cooking utensil having a side wall connected to a bottom consisting of at least three layers of materials, including an upper layer, a lower layer and an intermediate layer.
• a brewing material contributes substantially to the adhesion of the different layers and is in no way intended to optimize the thermal properties.
• the thermal behavior of such an assembly can not be modified or adapted.
• the object of the present invention is to propose a solution making it possible to overcome the drawbacks associated with a poor diffusion of the temperature at the bottom of a cooking vessel or to provide a cooking vessel which has particular properties, particularly because of the existence of a thermal break or mechanical discontinuity between different layers of materials that constitute its background, as evoked above.
• the present invention relates to a cooking vessel having a side wall connected to a bottom consisting of at least three layers of materials including an upper layer, a lower layer and an intermediate layer, said bottom having a void space s' extending around its periphery and delimited between the inner layer, the upper layer and the peripheral edge or an upper peripheral annular face of the intermediate layer.
• the cooking vessel is characterized in that it comprises a filling element able to fill the empty space.
• a filling element able to fill the empty space.
• said filler element is at least partially made of a ductile material allowing it, if necessary, to easily deform during the manufacturing process of the cooking vessel.
• the filling element is at least partially made of a thermal conductive material, to ensure a homogeneous heat diffusion at the bottom of the cooking vessel.
• the thermal conductive material may be a metal selected from the group consisting of aluminum, copper, their alloys or any equivalent thermally conductive material.
• the filler element is at least partially made of a thermal insulating material, making it possible, if necessary, to provide a thermal break between the layers of material of which the bottom of the cooking vessel is made up.
• the thermal insulating material may be selected from the group consisting of silicone, zirconium or any equivalent thermally insulating material.
• said filling element may have a volume substantially complementary to that of the empty space to be filled.
• the filling element may initially have a toric shape.
• the invention also relates to a method of manufacturing a cooking vessel as defined above, in which at least three layers of materials are superimposed, including an upper layer, a lower layer and an intermediate layer intended to form the bottom of the container, while at least the upper layer is intended to also form the side wall of the container, then said container is formed by forming, embossing or stamping said layers of materials.
• This method is characterized in that a step is provided in which, by means of a filling element, a void space is filled with said bottom and extending around the periphery of said bottom between the lateral wall, the upper layer, the lower layer, and the peripheral edge or an upper peripheral annular face of the intermediate layer.
• a solid-state filling element is placed around the peripheral edge of the intermediate layer, between the upper layer and the lower layer.
• the filling element is arranged on an upper peripheral annular face of the intermediate layer.
• a filling element of substantially complementary shape to that of the empty space to be filled is preferably used.
• the manufacturing process consists in separately stamping the upper layer and the lower layer to form two tanks, joining one of said tanks to the intermediate layer, which is carried out disc form and assemble said tanks by integrating at least locally an insulating layer between said tanks.
• the inner vessel is then advantageously nested or inserted into the outer vessel by enclosing the intermediate layer and the filling element.
• the method according to the invention consists in using an intermediate layer in the form of a disc machined on its lower face, to deposit and to secure the possibly preformed filling element on an annular face upper peripheral of said intermediate layer.
• a filling element in the liquid or powder state is injected into said empty space after the drawing, forming or embossing step.
• the present invention also provides the possibility of performing the step of filling the empty space concomitantly with the stamping, embossing or forming step that is carried out by immersing said layers of materials in a bath of a filling element in the liquid state or in the state of microbeads or powder.
• the method according to the invention is also characterized by the possibility of using a filling element made of a composite material.
• FIG. 1 illustrates a sectional view of a cooking vessel according to the invention
• FIG. 2 illustrates a sectional view of a cooking vessel according to the invention obtained by forming, embossing or drawing the layers of materials of FIG. 1;
• FIG. 3 is an enlarged view of the detail D of FIG. 2, and
• the cooking vessel 1 comprises a side wall 2 and a bottom 3 and is obtained by forming, stamping or embossing a superposition 10 of four layers of materials of different kinds.
• the superposition 10 comprises an upper layer 4 and a lower layer 5 made of the same material, for example type 304 stainless steel 18-9D. In the example shown, they have a thickness of 0.4 mm, and a diameter of 350 mm.
• the superposition 10 further comprises an additional layer 7 of a material composed of 80% nickel, with a thickness of 0.2 mm and disposed between the lower layer 5 and the intermediate layer 6. This additional layer 7 is however optional, and does not make any particular contribution to the present invention.
• the upper and lower layers 5 define the side wall 2 of the cooking vessel 1 while the bottom 3 consists of the upper and lower layers 4, 5 of the intermediate layer 6 and the additional layer 7.
• the bottom 3 comprises a void space 8 delimited by the internal faces 12, 13 of the upper layers 4, lower 5 and the peripheral edge 11 of the intermediate layer 6.
• the layer 5 is covered by the additional layer 7 and this at the bottom 3.
• this empty space 8 is filled by means of a filling element 9 preferably made of a ductile material which can for example be introduced in the solid state before the forming step, repoussage or In this case, it preferably has a toroidal shape substantially complementary to that of the empty space 8 to fill.
• the filling element 9 in the solid state can simply be conveniently arranged between the different layers of material 4, 5, 6. It can also be assembled to the peripheral edge 11 of the intermediate layer 6, previously machined to the shape free space 8, for example by brazing or welding or any other equivalent assembly technique.
• the filling element 9 can be introduced during the forming, embossing or embossing step, by simultaneously dipping the superposition 10 in a bath of a filling element 9 in the liquid state, in the form of microbeads or powder.
• Another alternative that can be envisaged furthermore provides the possibility of injecting the filling element 9 into the empty space 8 after the step of forming, embossing or stamping the cooking vessel.
• the filling element 9 may be designed from a material having thermal conduction properties, such as in particular aluminum, copper, their alloys or any other material with equivalent properties.
• the filling element 9 can also be designed from a material having thermal insulation qualities, making it possible to break the thermal continuity between the different layers of materials constituting the bottom 3 of the cooking vessel 1.
• a material having thermal insulation qualities such as in particular zirconium.
• the invention also provides the possibility of filling the empty space 8 by means of a filling element 9 made of a composite material, consisting for example of materials of different types mixed or pre-agglomerated.
• the filling element 9 can also act as an interface between the different materials constituting the bottom 3, the respective expansion coefficients of which differ from each other, which advantageously allows to confer an additional degree of freedom on certain materials and consequently to avoid an untimely deformation of the bottom 3.
• the filling element 9 is preferably made of a material different from that of the intermediate layer 6, so as to have the properties of ductility, insulation or thermal conductivity of which the intermediate layer 6 is, where appropriate, devoid of , or to allow a mechanical discontinuity.
• the filling element 9 initially having a substantially toroidal shape is shown once deformed after the stamping operation of the bottom 3 and of the lateral wall 2.
• an intermediate layer 6 in the form of a disc machined on its lower face is used so as to have a rounded peripheral edge.
• the latter can thus be intimately wrapped by the lower layer 5 after the stamping operation.
• the filling element 9 may advantageously be preformed so as to have substantially the shape of the empty space 8 located between the upper and lower layers 4 and 5 and an upper peripheral annular face of said intermediate layer 6.
• the filling element 9 is thus disposed and secured to said intermediate layer 6 for example by welding or brazing.
• the upper 4 and lower 5 layers are advantageously pre-drilled separately and then assembled to grip the filling element 9 arranged on the intermediate layer 6.
• the previously stamped lower layer 5 is for example welded beforehand to the intermediate layer 6 before bringing back the filling element 9.
• the upper layer 4, previously stamped, is then inserted into the bottom layer 5, so as to form the bottom 3 and the double side wall 2 of the cooking vessel thus formed. .
• the container according to the invention has the remarkable advantage that the filling element 9 constitutes an interface between the materials whose coefficient of expansion is different, thus giving an additional degree of freedom to certain materials and thus avoiding bottom deformations. 3.
• the filling element 9 can advantageously have a diameter or height, of greater cross section than that of the intermediate layer 6, thus ensuring the best filling of the empty space 8 after the stamping or forming operation.
• the filling element 9 can also fill only a part of the peripheral empty space and then deform sufficiently after the stamping or forming operation to extend throughout said empty space 8 .
• the filling element 9 can be introduced directly around the intermediate layer 6 before attachment to an inner vessel or an outer vessel or on a capsule.
• the use of a filling element 9 has the enormous advantage that it avoids a machining operation of the intermediate layer 6. This is particularly advantageous when this intermediate layer is a steel disc.
• the filling element 9 prevents any piercing of the outer vessel or the capsule. Such piercing is often observed when the intermediate layer 6 has a sharp edge on which are folded by stamping or forming one or more outer layers.
• the lower layer 5 may be sized to be welded, once pressed to the tank formed by the upper layer 4 to form a capsule corresponding to the bottom 3 of the container.

Landscapes

• Engineering & Computer Science (AREA)
• Food Science & Technology (AREA)
• Mechanical Engineering (AREA)
• Cookers (AREA)
• Details Of Rigid Or Semi-Rigid Containers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=51688224

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Citations (1)

Family Cites Families (3)

• 2014
  • 2014-07-03 FR FR1456354A patent/FR3023154B1/fr not_active Expired - Fee Related
• 2015
  • 2015-07-03 WO PCT/FR2015/051846 patent/WO2016001603A1/fr active Application Filing
  • 2015-07-03 EP EP15753096.5A patent/EP3164037A1/fr not_active Withdrawn
  • 2015-07-03 JP JP2017520014A patent/JP2017521209A/ja active Pending
  • 2015-07-03 CN CN201580036502.2A patent/CN106470581A/zh active Pending
  • 2015-07-03 US US15/322,196 patent/US20170150845A1/en not_active Abandoned

Patent Citations (1)

Non-Patent Citations (1)

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