INK CARTRIDGE Russian patent published in 2008 - IPC B41J2/175 

FIELD: polygraphy.

SUBSTANCE: ink cartridge contains an ink vessel, an outlet to feed ink communicating with the said vessel via ink overflowing channel and a mechanism to create a negative pressure selectively opening and closing the aforesaid channel according to ink consumption and an elastic element. The elastic element has the first and second surfaces, the first flowing channel facing the surface and communicating with the said vessel, an opening part arranged so that the elastic element first surface comes in contact with the opening part and gets separated there from and communicates with the ink fee outlet, and a part in the form of a space gap facing the elastic element second surface and communicating with the ink feed outlet via the third flowing channel. The cartridge reduces the flowing channel drag around the through hole in the mechanism creating the negative pressure, regulates the ink feed into the writing head.

EFFECT: production of cartridges with a high yield of high-quality products.

17 cl, 34 dwg