Patent ID: 7475972
Filing Date: 2009-01-13
Classification: B41J

Abstract:
1. A one-way valve unit assembly comprising: a bottom cover with a through hole for holding a valve; a pressing cover with a through hole; and an elastic valve disposed between the bottom cover and the pressing cover, the elastic valve including wherein, the pressing cover is maintained selectively in contact with said head support portion through hole of said elastic valve by a pressure difference wherein, a circumference side is at the downside of the foot support portion of the valve; said foot support portion of the valve is provided with a curved part; said bottom cover is composed of a cylindrical wall, a plane portion, and a circumferential wall protruded from the inner surface portion of the through hole of said bottom cover; said pressing cover includes a top cover and a cylindrical wall, there is a valve plane in the middle of the top cover for connecting with the head support portion of said valve, and the through hole of the pressing cover is provided in the non-valve plane region and said curved part of said valve is disposed between said circumferential wall of said bottom cover and the end of said vertical wall of said pressing cover.