Insertable Thermotic Module for Self-Heating Can

Abstract

A self-heating container having a container body with an internal beverage section and a thermic cavity. A liquid reactant is positioned in a first section of the thermic cavity and a solid reactant is positioned in a second section of the thermic cavity. The solid reactant may be an amount of CaO ranging from about 80 to 99 percent by weight combined with a wax based inhibitor ranging from about 1 to 20 percent by weight. The wax based inhibitor has a melting point ranging from above 100° C. to about 120° C.

1 . A container having a thermotic module and a label attached to a surface of said container, said label comprising an irreversible ink which gives an irreversible indicia when said thermotic module has been activated. 
   
   
       2 . The container according to  claim 1 , wherein said irreversible ink is a thermochromic ink. 
   
   
       3 . The container according to  claim 2 , wherein said indicia comprises lettering formed by said irreversible ink. 
   
   
       4 . The container according to  claim 2 , wherein said indicia comprises the negative image of lettering formed by said irreversible ink. 
   
   
       5 . The container according to  claim 2 , wherein said irreversible ink is a thermochromic leuco dye ink. 
   
   
       6 . The container according to  claim 2 , wherein said label comprises a PVC film and said ink is printed on a surface of said film which attaches to said container. 
   
   
       7 . The container according to  claim 2 , wherein said label comprises said ink applied directly to a metal surface of said container. 
   
   
       8 . The container according to  claim 2 , wherein said ink changes color state at a temperature of at least about 40 degrees Celsius. 
   
   
       9 . The container according to  claim 5 , wherein said ink changes color state at a temperature of at least about 40 degrees Celsius. 
   
   
       10 . The container according to  claim 6 , wherein said ink changes color state at a temperature of at least about 40 degrees Celsius. 
   
   
       11 . The container according to  claim 6 , wherein said ink changes color state at a temperature of at least about 40 degrees Celsius. 
   
   
       12 . The container according to  claim 2 , wherein said label is applied to a metal surface of said container. 
   
   
       13 . A self-heating container comprising:
 a. a metal container body having an enclosed volume for receiving a beverage and a bottom end with a cavity formed of metal internal walls extending upward into said enclosed volume;   b. a solid reactant positioned within said cavity;   c. a liquid reactant cup having a top and bottom end and a breakable barrier covering said top end to retain a liquid reactant therein;   d. said liquid reactant cup having a an outer shoulder with a vent passage formed therethrough such that no pressure differential is created in a space above and a space below said cup; and   e. a label attached to a surface of said container, said label comprising an irreversible ink which gives an irreversible indicia when said thermotic module has been activated.   
   
   
       14 . The self-heating container according to  claim 13 , further comprising a metal end ring with a second breakable barrier attached thereto, said end ring being crimped onto a bottom of said metal container body to form a substantially moisture tight seal between an interior of said cavity and an environment outside said container. 
   
   
       15 . The container according to  claim 13 , wherein said label comprises said ink applied directly to a metal surface of said container.