Patent ID: 7748819
Filing Date: 2010-07-06
Classification: B41J

Abstract:
1. A liquid storage unit comprising: a case; a liquid chamber provided in the case and storing liquid; a gas chamber provided in the case and accommodating gas; a liquid port communicating with the liquid chamber and configured to lead out the liquid therefrom; a gas port communicating with the gas chamber and configured to introduce gas into the gas chamber; an inner frame portion provided in the case; an outer frame portion provided in the case and surrounding the inner frame portion, the outer frame portion being higher than the inner frame portion; an inner film thermally welded to the inner frame portion; and an outer film thermally welded to the outer frame portion, wherein the liquid chamber is defined by at least the inner film and the case; and wherein the gas chamber is defined by at least the outer film, the inner film and the case.