Lerner, David, Littenberg & Samuel
Thrusting cock
 A thrusting cock which is used for pouring out the liquid contents of a paper container by being thrust into the wall portion of said container, and comprises: a cylindrical body portion; a flange portion integrally formed on the front end of said body portion; a double-edged knife attached to the front face of said flange portion; auxiliary knives attached to both surfaces of said double-edged knife; a spiral ridge formed between the rear ends of said auxiliary knives and the front portion of said flange; and a gasket provided between the rear end of said spiral ridge and the front face of said flange. 
Toppan Printing Co., Ltd.
B
B67B
inventional
Noriyoshi
Kato