Patent ID: 7658103

Claim:
A residual liquid quantity detecting method characterized by a residual liquid quantity detecting method of a liquid supply container comprised by a container body that has a liquid supply opening and a liquid storage chamber formed inside said container body, is linked to said liquid supply opening, and seals the liquid, wherein said liquid is supplied from said liquid supply opening to the outside of said container by means of a primary supply pressure generated by reducing the capacity of said liquid storage chamber under pressurization, said residual liquid quantity detecting method detects said primary supply pressure of said liquid and then detects the residual quantity of said detected liquid inside said liquid storage chamber; said residual liquid quantity detecting method characterized by correcting said detected residual quantity of liquid based on the ambient temperature of said liquid storage chamber; said residual liquid quantity detecting method characterized by said residual quantity of liquid V being measured by the following equation; V = P - P b P 0 - P 1 × ( V 0 - V 1 ) EQUATION in this equation V is the residual quantity of liquid, P is the primary pressure while being monitored, P b is a fixed number, V 0 is an arbitrary residual quantity of liquid, P 0 is the primary pressure of the residual quantity of liquid V 0 , V 1 is a residual quantity of liquid smaller than V 0 , and P 1 is the primary pressure of the residual quantity of liquid V 1 .