Patent ID: 6628785
Filing Date: 2003-09-30
Classification: G01D,G01N,G09F

Abstract:
A water sinking confirmation device comprising:a lower case provided with a hole for confirming water sinking; a double side coated adhesive member for bonding both sides surrounding the hole; a transparent sheet allowing a state change of a water sinking confirmation seal to be seen through the hole and the sheet from a surface thereof; and the water sinking confirmation seal including a second double side coated adhesive member disposed at both ends of the transparent sheet and a paper, the second double side coated adhesive member being disposed between the transparent sheet and the paper, the transparent sheet and the paper defining a gap therebetween approximately equal to the thickness of the second double side coated adhesive member, the gap between the transparent sheet and the paper facilitating entrance of water between the transparent sheet and the paper, and the paper applied with printing with a water-soluble ink, the state change being irreversible distortion of the printing after the case has been sunk in water.