CARTRIDGE COVER, CARTRIDGE, INKJET PRINTING HEAD AND INKJET PRINTER Russian patent published in 2025 - IPC B41J2/175 

FIELD: printing.

SUBSTANCE: present invention relates to inkjet printing technology. Cartridges, the paint reservoir of which communicates with the external environment through the vent hole, are subject to paint leakage with significant changes in the external pressure relative to the external pressure after paint filling, in particular, due to possible air bubbles trapped in the paint tank. In the present invention, the cartridge cover is provided with an expansion gap made between the outer cover element and the inner cover element. Expansion gap communicates with ambient medium through vent hole and has inlet hole through which paint can flow into expansion gap. Present invention also provides a cartridge, an inkjet printing head and an inkjet printer.

EFFECT: providing a low evaporation rate and at the same time maintaining a balance of pressure inside and outside the ink tank even during printing, avoiding distortion of internal pressure in a sealed container, which could easily lead to spraying of paint from the vent hole.

13 cl, 15 dwg