Patent ID: 7850063

Claim:
A tamper evident envelope comprising: a main portion formed by front and back walls, a top portion and a bottom portion, each of said top and bottom portions including a fold extension for closing the respective top and bottom portion, said top and bottom portions each including a strip formed by first and second strip portions secured to each other, said first strip portion including a groove along the length of the strip extending from adjacent one end of the strip to adjacent an opposing end of the strip, said strips being secured between said top and bottom portion fold extensions, respectively and said front wall to form seams at the top and bottom portions of the envelope, a dye sealed within each said groove between said first strip portion and said second strip portion of each strip, means for opening said envelope to access the interior of the envelope, whereby separation of one of said seams damages the respective strip allowing said dye to escape from said strip onto adjacent portions of the envelope to form a visual indicator that the one seam has been opened.