Stock material or miscellaneous articles – All metal or with adjacent metals – Composite; i.e. – plural – adjacent – spatially distinct metal...
Reexamination Certificate
2006-01-31
2006-01-31
Koehler, Robert R. (Department: 1775)
Stock material or miscellaneous articles
All metal or with adjacent metals
Composite; i.e., plural, adjacent, spatially distinct metal...
C428S548000, C428S553000, C428S554000, C428S555000, C428S557000, C428S577000, C428S596000, C428S607000, C428S609000, C428S615000, C428S629000, C428S652000, C428S662000, C428S674000, C428S680000, C428S469000, C428S940000, C029S017200, C029S017300, C029S017900, C029S428000, C228S107000, C228S121000, C228S175000, C228S178000, C228S208000, C228S225000, C228S226000, C228S234300, C228S245000, C228S246000, C228S247000, C228S249000, C228S252000, C228S902000
Reexamination Certificate
active
06991856
ABSTRACT:
Reactive foils and their uses are provided as localized heat sources useful, for example, in ignition, joining and propulsion. An improved reactive foil is preferably a freestanding multilayered foil structure made up of alternating layers selected from materials that will react with one another in an exothermic and self-propagating reaction. Upon reacting, this foil supplies highly localized heat energy that may be applied, for example, to joining layers, or directly to bulk materials that are to be joined. This foil heat-source allows rapid bonding to occur at room temperature in virtually any environment (e.g., air, vacuum, water, etc.). If a joining material is used, the foil reaction will supply enough heat to melt or soften the joining material, which upon cooling will form a strong bond, joining two or more bulk materials. If no joining material is used, the foil reaction supplies heat directly to at least two bulk materials, melting or softening a portion of each bulk, which upon cooling, form a strong bond. Additionally, the foil may be designed with openings that allow extrusion of the joining (or bulk) material through the foil to enhance bonding.
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L. Battezzati et al., “Solid State Reactions in Al/Ni Alternate Foils Induced By Cold Rolling and Annealing,” Acta Mater., vol. 47, No. 6, pp. 1904-1914 (1999), no month given.
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Hufnagel Todd
Knio Omar
Reiss Michael
Swiston, Jr. Albert Joseph
van Heerden David
Johns Hopkins University
Koehler Robert R.
Lowenstein & Sandler PC
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