Patent ID: 6299298
Filing Date: 2001-10-09
Classification: B41J

Abstract:
A liquid container comprising:a first chamber for containing a reservoir of liquid;a second chamber containing a negative pressure producing material;an air vent for fluid communication between said second chamber and ambient air;a liquid supply port for supplying liquid out of said second chamber;structure defining a communication opening for fluid communication between said first chamber and said second chamber wherein said first chamber is generally sealed from ambient air except through said communication opening; anda wall extending from said structure defining the communication opening;wherein said communication opening has a first portion and a second portion, said first portion being adjacent a top of said communication opening and said second portion being adjacent a bottom of said communication opening when the liquid container is used, said first portion maintaining fluid communication between said first chamber and said second chamber to permit movement of air from said second chamber to said first chamber, and said second portion maintaining fluid communication between said first chamber and said second chamber.