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1. WO2003021158 - EMBALLAGE CHAUFFANT A CAPACITE D'EXPANSION

Note: Texte fondé sur des processus automatiques de reconnaissance optique de caractères. Seule la version PDF a une valeur juridique

[ EN ]

WHAT IS CLAIMED IS:
1. A disposable heating device comprising:
a container having a first zone, a second zone and a third zone;
a fuel contained within the first zone;
an oxidizing agent contained within the second zone;
a first frangible separator disposed between the first zone and the second zone, the first frangible separator being manually operable to provide communication therebetween, defining a reaction chamber;
a second frangible separator responsive to an exothermic chemical reaction within the reaction chamber, the second frangible separator being operable to provide communication between the reaction chamber and the third zone;
wherein communication between the first zone and the second zone allows mixing of the fuel and the oxidizing agent to initiate an exothermic chemical reaction; and
wherein an environmental parameter associated with the exothermic chemical reaction operates the second frangible separator.
2. The disposable heating device of claim 1 wherein the environmental parameter associated with the exothermic chemical reaction comprises an elevated temperature.
3. The disposable heating device of claim 1 wherein the environmental parameter associated with the exothermic chemical reaction comprises an elevated pressure.
4. The disposable heating device of claim 1 further comprising a heat sink thermally coupled to the third zone.
5. The disposable heating device of claim 4 wherein the heat sink comprises a phase change material.

6. The disposable heating device of claim 1 further comprising a non- fuel gelling agent solution in at least one of either the first zone, the second zone or the third zone;
wherein communication between the gelling agent and the reaction chamber initiates gelation of the gelling agent to produce a non-fuel gel that moderates the rate of the reaction independently of dissolution of the gelling agent; and
wherein a sufficient amount of the gelling agent exists to produce gel rapidly enough to prevent a temperature associated with the exothermic chemical reaction from exceeding a predetermined maximum value.
7. The disposable heating device of claim 1 further comprising:
a preformed stiffenable gel and a vaporizable solvent in the first zone;
wherein the oxidizing agent is embedded and dispersed throughout the second zone in a dissolvable binding agent;
wherein the dissolvable binding agent dissolves during the exothermic chemical reaction to controllably expose the oxidizing agent at a predetermined rate; wherein the vaporizable solvent vaporizes when a temperature associated with the exothermic chemical reaction reaches a predetermined maximum value, thereby causing stiffening of the gel; and
wherein a sufficient amount of preformed stiffenable gel exists to prevent the temperature associated with the exothermic chemical reaction from exceeding the predetermined maximum value.
8. The disposable heating device of claim 1 further comprising a plurality of at least one of the first zone and the second zone.
9. The disposable heating device of claim 1 wherein the third zone is balloonable.
10. The disposable heating device of claim 1 wherein the container is conformable to a shape defined by its surroundings.

11. The disposable heating device of claim 1 wherein the container comprises a material that is resistant to the exothermic chemical reaction.
12. The disposable heating device of claim 1 wherein the container comprises a polymeric material.
13. The disposable heating device of claim 1 wherein the exothermic chemical reaction is a reduction-oxidation type of reaction.
14. The disposable heating device of claim 1 wherein the oxidizing agent is potassium permanganate.
15. The disposable heating device of claim 1 wherein the fuel is an oxidizable organic compound.
16. The disposable heating device of claim 1 further comprising a valve coupled to the container and operable to provide communication between either the first zone, the second zone, or the third zone and atmosphere.
17. The disposable heating device of claim 16 wherein the valve is responsive to at least one of either temperature or pressure.
18. The disposable heating device of claim 1 further comprising a plurality of containers, each container being isolated from an adjacent container by a separator disposed there between.
19. The disposable heating device of claim 1 wherein the second frangible separator comprises frangible portions and sealed portions aligned in an alternating pattern.
20. The disposable heating device of claim 19 wherein each container comprises an independently operable first frangible separator.
21. The disposable heating device of claim 1 wherein the first zone and the second zone are in thermal contact with a product to be heated.
22. The disposable heating device of claim 21 wherein the product to be heated is food.

23. The disposable heating device of claim 21 wherein the product to be heated is a drink.
24. The disposable heating device of claim 21 wherein the product to be heated is a body part of a surgical patient.
25. The disposable heating device of claim 21 wherein the product to be heated is a body part of a patient undergoing therapy.
26. The disposable heating device of claim 21 wherein the product to be heated is an article of clothing or footwear.
27. A disposable heating device comprising:
a flexible upper sheet;
a flexible lower sheet attached to the upper sheet at edges thereby defining a compartment;
a manually operable first frangible separator disposed within the compartment to define a first zone containing a fuel and a second zone containing an oxidizing agent;
a second frangible separator responsive to an exothermic chemical reaction, the second frangible separator being disposed within the compartment to provide an interface between at least one of either the first zone or the second zone and a third zone;
wherein manual operation of the first frangible separator allows communication between the first zone and the second zone and initiation of an exothermic chemical reaction.
28. The disposable heating device of claim 27 wherein the exothermic chemical reaction operates the second frangible separator to provide communication between at least one of either the first zone or the second zone and the third zone.
29. The disposable heating device of claim 28 wherein operation of the second frangible separator is in response to an elevated pressure associated with the exothermic chemical reaction.

30. The disposable heating device of claim 28 wherein operation of the second frangible separator is in response to an elevated temperature associated with the exothermic chemical reaction.
31. The disposable heating device of claim 27 further comprising:
a non- fuel gelling agent solution in at least one of the first zone, the second zone or the third zone;
wherein communication between the gelling agent and the exothermic chemical reaction initiates gelation of the gelling agent to produce a non-fuel gel that moderates the exothermic chemical reaction.
32. The disposable heating device of claim 27 further comprising:
a preformed stiffenable gel and a vaporizable solvent in the first zone;
wherein the vaporizable solvent vaporizes when a temperature associated with the exothermic chemical reaction reaches a predetermined maximum value, thereby causing stiffening of the gel to moderate the exothermic chemical reaction.
33. The disposable heating device of claim 27 further comprising a heat sink thermally coupled to the third zone.
34. The disposable heating device of claim 33 wherein the heat sink comprises a phase-change type of material.
35. The disposable heating device of claim 27 wherein the upper sheet and the lower sheet are each conformable to a shape defined by their surroundings.
36. The disposable heating device of claim 27 wherein the upper sheet and the lower sheet comprise a material that is resistant to the exothermic chemical reaction.
37. The disposable heating device of claim 28 wherein the upper sheet and the lower sheet comprise a polymeric material.
38. The disposable heating device of claim 27 wherein the first zone and the second zone are in thermal contact with a product to be heated.

39. The disposable heating device of claim 27 wherein the second frangible separator comprises a plurality of frangible portions and a plurality of non-frangible portions.
40. The disposable heating device of claim 39 wherein the frangible portions and non-frangible portions are linearly aligned in an alternating manner across the frangible separator.
41. A disposable heating device comprising:
a reaction chamber defining an initial internal volume for initiating an exothermic chemical reaction therein;
an expansion chamber adjacent to the reaction chamber; and
a frangible seal disposed between the reaction chamber and the expansion chamber, the frangible seal being operable in response to the exothermic chemical reaction;
wherein operation of the frangible seal establishes communication between the reaction chamber and the expansion chamber thereby defining an increased internal volume for containing the exothermic reaction.
42. The disposable heating device of claim 41 wherein operation of the frangible seal results in a reduction of pressure associated with the chemical reaction.

43. The disposable heating device of claim 41 wherein the increased internal volume is approximately 101% to 200% greater than the initial internal volume.
44. The disposable heating device of claim 41 wherein the increased internal volume is approximately 110% to 150% greater than the initial internal volume.
45. The disposable heating device of claim 41 wherein the frangible seal is operable in response to an elevated temperature associated with the exothermic chemical reaction.

46. The disposable heating device of claim 41 wherein the frangible seal is operable in response to an elevated pressure associated with the exothermic chemical reaction.
47. The disposable heating device of claim 41 further comprising a heat sink in thermal contact with the expansion chamber.
48. The disposable heating device of claim 41 further comprising a valve coupled to the reaction chamber, the valve being responsive to at least one of either pressure or temperature, and being operable to provide communication between the reaction chamber and atmosphere.
49. A method of heating a product, the method comprising:
providing a heating device in thermal contact with the product, the heating device comprising:
a container having a first zone, a second zone and a third zone;
a fuel contained within the first zone;
an oxidizing agent contained within the second zone; a first frangible separator disposed between the first zone and the second zone, the first frangible separator being manually operable to provide communication between the first zone and the second zone;
a second frangible separator responsive to temperature and pressure, the second frangible separator being operable to provide communication either between the first zone and the third zone, or between the second zone and the third zone, or between the first zone and the third zone and between the second zone and the third zone, wherein communication between the first zone and the second zone allows mixing of the fuel and the oxidizing agent to create an exothermic chemical reaction generating vapor in the first zone and the second zone, and wherein a pressure and temperature associated with generating the vapor operates the second frangible separator to allow the vapor to move into the third zone; and compromising the first frangible separator to establish communication between the first zone and the second zone thereby initiating the exothermic chemical reaction and heating the product.
50. The method of claim 49 wherein the product to be heated comprises food.
51. The method of claim 49 wherein the product to be heated comprises a drink.
52. The method of claim 49 wherein the product to be cooled comprises a body part of surgical patient.
53. The method of claim 49 wherein the product to be cooled is an article of clothing or footwear.
54. The method of claim 49 wherein the heating device further comprises a plurality of containers, each container comprising a respective first frangible separator that is manually operable, the method further comprising compromising another first frangible separator to initiate a second exothermic chemical reaction.
55. A system for heating an object, the system comprising:
a thermally conductive package; and
a heating device disposed within the package, the heating device comprising:
a container having a first zone, a second zone and a third zone;
a fuel contained within the first zone;
an oxidizing agent contained within the second zone;
a first frangible separator disposed between the first zone and the second zone, the first frangible separator being manually operable to provide communication therebetween, defining a reaction chamber;
a second frangible separator responsive to an exothermic chemical reaction within the reaction chamber, the second frangible separator being operable to provide communication between the reaction chamber and the third zone;

wherein communication between the first zone and the second zone allows mixing of the fuel and the oxidizing agent to initiate an exothermic chemical reaction; and
wherein an environmental parameter associated with the exothermic chemical reaction operates the second frangible separator.
56. The system of claim 55 wherein the environmental parameter associated with the exothermic chemical reaction comprises an elevated temperature.

57. The system of claim 55 wherein the environmental parameter associated with the exothermic chemical reaction comprises an elevated pressure.
58. The system of claim 55 wherein the heating device further comprises a non- fuel gelling agent solution in at least one of either the first zone, the second zone or the third zone;
wherein communication between the gelling agent and the reaction chamber initiates gelation of the gelling agent to produce a non- fuel gel that moderates the rate of the reaction independently of dissolution of the gelling agent; and
wherein a sufficient amount of the gelling agent exists to produce gel rapidly enough to prevent a temperature associated with the exothermic chemical reaction from exceeding a predetermined maximum value.
59. The system of claim 55 wherein the heating device further comprises: a preformed stiffenable gel and a vaporizable solvent in the first zone;
wherein the oxidizing agent is embedded and dispersed throughout the second zone in a dissolvable binding agent;
wherein the dissolvable binding agent dissolves during the exothermic chemical reaction to controllably expose the oxidizing agent at a predetermined rate; wherein the vaporizable solvent vaporizes when a temperature associated with the exothermic chemical reaction reaches a predetermined maximum value, thereby causing stiffening of the gel; and wherein a sufficient amount of preformed stiffenable gel exists to prevent the temperature associated with the exothermic chemical reaction from exceeding the predetermined maximum value.
60. The system of claim 55 wherein the package is conformable to a shape defined by its surroundings.
61. The system of claim 55 wherein the oxidizing agent is potassium permanganate.
62. The system of claim 55 wherein the fuel is an oxidizable organic compound.
63. The system of claim 55 further comprising a fastening device for fastening the package to an object to be heated.
64. The system of claim 55 wherein the package is a sleeve.
65. The system of claim 55 wherein the third zone is thermally coupled to a product to be heated.
66. The system of claim 55 wherein the third zone is thermally isolated from a product to be heated.