Accordingly, without additional improvements in the systems and methods used in food preparation for emergency and expedient circumstances, the results from preparation of food and beverages in harsh or extreme environments will continue to be suboptimal. 1 is a partially cut away plan view of a first embodiment of the flameless heater according to the invention; FIG. The sheets 12 and 14 are thermally bonded along three respective edges 16, 18, 20 and along substantially parallel lines 22, 24, 26 thereby defining four pockets 28, 30, 32, 34. Group meals are more efficient than individual meals because only a few soldiers need to be distracted from other duties for the preparation of the meal. 4,522,190 to Kuhn et al. To use the heater, the top of the bag is opened and water added until the water level reaches preprinted fill lines on the bag. -Flameless MRE Ration Heater US 75VAO Truetech inc., Riverhead, NY 11901-2535 US Patent 5611329-Sleve-Chewing Gum-Matches D.D. The heating element comprises powdered aluminum, calcium oxide, calcium carbonate, calcium dihydroxide, sodium carbonate and sodium hydroxide that is reacted with water in a two stage chemical reaction to create heat within the heating bag. 14. Each pocket is filled with a powder mixture of Mg--Fe alloy, NaCl, antifoaming agents, and an inert filler. Portfolios Listing. When activated with 45-65 milliliters of water, the heater generates enough heat to raise the temperature of an 8 ounce food package 100° F. above its starting temperature within 12 minutes. A flameless heater includes two non-woven polyester sheets which are thermally bonded together to form a number of pockets. The pad is packaged within a paperboard cover having holes die cut through each side and then is hermetically sealed within a high density polyethylene bag of sufficient size to hold the heater and a filled MRE pouch. 8. a first stage reaction wherein the effective amount of water reacts with the powdered calcium oxide to generate heat of reaction; and. 6 and 7 activated and supporting a food pouch in a tray. Certain of the foregoing and related objects are also attained in a method of making a flameless heater, which includes the initial steps of providing a first and second substantially rectangular sheet of relatively flexible polymer which is gas and water permeable and forming spaced pockets in at least one of said sheets. An important consideration for the proper design of the heating element used in the most preferred embodiments of the present invention is that the reaction temperature rises rapidly to temperatures of 90° C. and above immediately after the first step reaction, that is, the reaction of calcium oxide with water and that the temperatures are maintained for at least 50 minutes. The sheets 112 and 114 are thermally bonded along three respective edges 116, 118, 120 and along substantially parallel lines 122, 124, 126, 128, 130 thereby defining six pockets 132, 134, 136, 138, 140, 142. Recently, it has been proposed that the concepts of the MRE be applied to group meals. A flameless heater includes two non-woven polyester sheets which are thermally bonded together to form a number of pockets. Moreover, while the heaters described herein are substantially rectangular, it will be appreciated that other shapes may be utilized with similar results obtained. The assembled heater 10 has a gross weight of approximately 12 grams and an overall thickness of about 0.085". 5a. It is another object of the invention to provide an flameless heater which does not require a rigid container. When water is added to the container 240, it permeates the sheets 112, 116, and initiates exothermic chemical reactions in the pockets 132, 134, 136, 138, 140, 142. A method according to claim 15, wherein: 17. f) bonding said first and second sheets along the periphery thereof and along a plurality of substantially parallel lines so as to seal said pockets and define intervening channels between said pockets. 3, the parallel welds 22, 24, 26 which define the pockets also define lower channels 29, 31, 33 between the container 40 and the heater 10 as well as upper channels 29a, 31a, 33a between the heater 10 and the food pouch 42. PATENT NO: 5611329: SERIAL NO: 08511561: DOCKET NO: 0 Status Updates Download: Stats. and 4,264,362 to Sergev et al., the complete disclosures of which are hereby incorporated by reference herein. The element and the heat generated by the heating element is transferred to a packaged food item placed within the heating bag, thereby heating the food item to a desired temperature. You can obtain up-to-date Status indicator readings by ordering PAIR for the file.   |   Not registered? The polyester sheets are gas and water permeable over substantially their entire surfaces and the filled pockets define intervening channels where the polyester sheets are bonded. A. It is still another object of the invention to provide an FRH which requires less water to activate than conventional FRH units. It is therefore an object of the invention to provide a flameless heater which weighs less than conventional FRH units. you sure you want to cancel Monthly update? We may have questions about your feedback, please provide your email address. According to the second embodiment of the invention, the sheets 112 and 114 are approximately 9.75" by 12.75". Nos. The outer surfaces of the polyester sheets are preferably treated with a surfactant. In order to measure the amount of water, the heater bag 104 is provided with a fill line 106 which when filled to indicates approximately 30 milliliters of water. FIG. 5b). g) coating said first and second sheets with a surfactant. Water is often scarce in the field and every ounce of water in a soldier's canteen is precious under field conditions. Turning now to FIG. 5e so that the heater 10 is below the food pouch 42 and the top of the pouch 104 is elevated. The MRE is heated in the field with a device militarily referred to as a "Flameless Ration Heater" ("FRH"). selecting a number of degassing valves to be installed in the resealable heating bag based on the interior space of the resealable heating bag. A flameless heater according to claim 12, wherein: said powder mixture includes approximately 82.5 grams magnesium with 5 atomic weight percent iron supercorroding alloy, approximately 7.7 grams inert filler, approximately 5.5 grams NaCl, approximately 3.3 grams antifoaming agents. By avoiding sintering processes, the heater can be easily and economically mass produced. As mentioned above, these rations are individually packaged and designed for use in situations where more conventional heaters cannot be used. The most preferred embodiments of the present invention comprise a heating element with 30% to 45% of powdered aluminum, 10% to 20% of powdered calcium oxide, 15% to 25% powdered calcium carbonate, 10% to 15% calcium dihydroxide, 10% to 15% powdered sodium carbonate and 0.1% to 1% of sodium hydroxide on the basis of the total weight of the heating element (approximately 50 g) that is contacted with approximately 6 oz (177.44 ml) of water to react the powdered calcium with water in a first reaction step to generate heat of reaction. Find upcoming programs related to IP policy and international affairs. The box 102 is then held horizontally for one minute as shown in FIG. MAGNESIUM ELEKTRON LIMITED, UNITED KINGDOM, Free format text: After the water has been added to the pouch, the top of the pouch is folded over and the pouch 104 is returned to the box 102 as shown in FIG. From the foregoing description, it should be appreciated that a unique system and method for heating and cooking food in a bag is provided by the various preferred embodiments of the present invention and that the various preferred embodiments offer significant benefits that would be apparent to one skilled in the art. The preferred embodiments of the present invention will hereinafter be described in conjunction with the appended drawings, wherein like designations denote like elements, and: A heating bag, containing a heating element is that is reacted with water to generate a chemical reaction to create heat and/or steam in a multi-stage chemical reaction process. 5c. A well-known construction for a flameless heater element is shown in U.S. Pat. An application with the status "Published" (which means it is pending) may be recently abandoned, but not yet updated to reflect its abandoned status. This prevents moisture from getting to the heating element prematurely, providing an isolation barrier that protects the heating element from contacting water until it is opened for use and placed in the heating bag. At least one degassing valve is embedded in the surface of the heating bag, providing for a way for steam to be released from the interior of the bag. It is anticipated that when the element is wrapped in the foil PET12/AL7/LLDPE40 material, it can be submerged under water for up to 40 hours without compromising the integrity of heating element, When pressure inside a sealed package increases beyond the valve opening pressure associated with the one way valve, the rubber disk in valve, Typical Valve Performance Data—open pressure: 20-70 mm H2O and close pressure: 5-45 mm H2O. The invention relates to a flameless heater utilizing an exothermic chemical reaction to produce heat and a method of making the heater. Please note that data in portions of the Examination Report will not be meaningful if: Accordingly, the most preferable particle size of calcium oxide used in the most preferred embodiments of the present invention is within a range from 100 mesh (90% and above of −150/inn) to 200 mesh (95% and above of −750/inn). The outer surface of the sheets 112, 114 is then preferably coated with a food grade surfactant which helps water permeate the sheets. It is also an object of the invention to provide an FRH which meets or exceeds the performance requirements of Military Specification MIL-R-44398B. 4. The paperboard cover adds approximately 9 grams to the overall weight of the heater, bringing the total weight of the heater to approximately 30 grams. U.S. Pat. It is another object of the invention to provide an flameless heater which may be manufactured without sintering the component powders. Current PAIR data will be loaded within twenty four hours. A standard group meal is 6.6 pounds. dia.×0.031 in. The flameless heater uses a simple chemical reaction to provide sufficient heat to warm the MRE to a more desirable level. In use, both the channels and the permeability of the sheets allow water to wet the powder rapidly and initiate the chemical reactions quickly. To add this patent to one, or more, of Check trademark application status and view all documents associated with an application/registration. 8, the parallel welds 122, 124, 126, 128, 130 which define the pockets also define lower channels 133, 135, 137, 139, 141 between the container 240 and the heater 110 as well as upper channels 133a, 135a, 137a, 139a, 141a between the heater 110 and the food pouch 242.

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