Patent ID: 9346281
Filing Date: 2016-05-24
CPC Classification: B41J,F16K,G05D

Claim Text:
1. A liquid supply unit configured to be connectable to a supply passage that supplies liquid to a liquid ejection head including a nozzle opening from which the liquid is ejected, the liquid supply unit comprising: a pressure adjusting valve portion that includes: a liquid outlet connectable to an upstream end of the supply passage; a liquid inlet that draws in the liquid from a liquid supply source, which contains the liquid; a pressure chamber connected to the liquid outlet and the liquid inlet, wherein the pressure chamber is at least partially formed by a flexible portion configured to be deformed when pressure of the pressure chamber changes; and an opening-closing valve configured to allow the liquid to be drawn from the liquid supply source to the pressure chamber through the liquid inlet in accordance with a deformation of the flexible portion.