Multiple copy thermal record sheet
 A thermal-sensitive record sheet copy system provides multiple copies by applying a coating to one record sheet. The single coating formulation includes ingredients which react to heat to provide a tacky condition having a desirable adhering property and thereby produce images on the two sheets. The coating includes a binder of synthetic polyterpene in the mixture in combination with a thermochromic dye and a phenolic resin. 
NCR Corporation
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Y10S Y10S B41M
additional additional inventional
Stephen D. Maurice W.
Lakes Lewis