| 摘要 |
A check valve (100, 200) for vacuum packing bags, installed on a suction nozzle (2) of a packing bag (1) to discharge air from the bag 1 to the outside. The check valve (100, 200) comprises: a valve body (10, 210) including a hole (11, 211) formed at a central of a bottom of the valve body (10, 210), an inner space defined within the valve body (10, 210) above the hole (11, 211) and a projected section (14, 214) for being inserted into the suction nozzle (2), the projected section (14, 214) being reduced in diameter as extended away from the hole (11, 211); and means for opening and closing the hole (11, 211) installed in the inner space of the valve body (10, 210). |
