Patent ID: 7513383

Claim:
An opening device for a can, which is formed on a top surface of a cylindrical can with contents contained therein, comprising: a first opening portion through which the contents flow out upon opening thereof and a second opening portion through which exterior air is introduced into the can upon opening thereof, the first opening portion defined by a first incision line on the top surface and the second opening portion defined by a second incision line on the top surface so that a part of each of the opening portions is attached to the top surface; and a tab mounted on the top surface of the can by a first rivet stub installed outside of the first opening portion and a second rivet stub installed within the second opening portion, wherein a center of the first opening portion and the first rivet stub are substantially aligned forming a first line, and a center of the second opening portion and the second rivet stub are substantially aligned forming a second line substantially parallel to the first line, wherein a third line substantially perpendicular to the first line and the second line substantially bisects the top surface, and the first opening portion is located on an opposite side of the third line from the second opening portion, wherein the second opening portion is opened while being lifted together with the second rivet stub, the first opening portion is opened while being pressed by a pressing portion around the first rivet stub, and the second rivet stub is formed to be closer to a grip of the tab than the first rivet stub.